A traditional Korean palace with a large, ornate building in the center, surrounded by a courtyard with stone pathways and red-roofed structures.

$349 Cheap Flights from San Francisco (SFO) to Seoul (ICN)

View $349 flight on Wed, Sep 9, 2026Opens in a new window

Popular airlines from San Francisco Intl. Airport (SFO) to Incheon Intl. Airport (ICN)

Cheap Flights from San Francisco to Seoul (SFO-ICN)

Prices were available within the past 7 days and start at $349 for one-way flights and $643 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Air Premia
Fri, Aug 28 - Sat, Sep 5
SFO
San Francisco
ICN
Seoul
$643 Roundtrip, just found
$643
Roundtrip
just found
Select Air Premia flight, departing Fri, Aug 28 from San Francisco to Seoul, returning Sat, Sep 5, priced at $643 just found
United
Fri, Sep 4 - Fri, Sep 11
SFO
San Francisco
ICN
Seoul
$646 Roundtrip, found 1 hour ago
$646
Roundtrip
found 1 hour ago
Select United flight, departing Fri, Sep 4 from San Francisco to Seoul, returning Fri, Sep 11, priced at $646 found 1 hour ago
Air China
Wed, Nov 18 - Tue, Dec 1
SFO
San Francisco
ICN
Seoul
$686 Roundtrip, just found
$686
Roundtrip
just found
Select Air China flight, departing Wed, Nov 18 from San Francisco to Seoul, returning Tue, Dec 1, priced at $686 just found
China Southern Airlines
Mon, Nov 30 - Mon, Dec 14
SFO
San Francisco
ICN
Seoul
$776 Roundtrip, found 6 hours ago
$776
Roundtrip
found 6 hours ago
Select China Southern Airlines flight, departing Mon, Nov 30 from San Francisco to Seoul, returning Mon, Dec 14, priced at $776 found 6 hours ago
Asiana Airlines
Tue, Sep 1 - Tue, Sep 8
SFO
San Francisco
ICN
Seoul
$801 Roundtrip, just found
$801
Roundtrip
just found
Select Asiana Airlines flight, departing Tue, Sep 1 from San Francisco to Seoul, returning Tue, Sep 8, priced at $801 just found
Philippine Airlines
Mon, Mar 8 - Mon, Mar 15
SFO
San Francisco
ICN
Seoul
$836 Roundtrip, found 19 hours ago
$836
Roundtrip
found 19 hours ago
Select Philippine Airlines flight, departing Mon, Mar 8 from San Francisco to Seoul, returning Mon, Mar 15, priced at $836 found 19 hours ago
Cathay Pacific
Tue, Sep 1 - Tue, Sep 8
SFO
San Francisco
ICN
Seoul
$843 Roundtrip, just found
$843
Roundtrip
just found
Select Cathay Pacific flight, departing Tue, Sep 1 from San Francisco to Seoul, returning Tue, Sep 8, priced at $843 just found
Vietnam Airlines
Thu, Sep 17 - Wed, Oct 7
SFO
San Francisco
ICN
Seoul
$847 Roundtrip, found 18 hours ago
$847
Roundtrip
found 18 hours ago
Select Vietnam Airlines flight, departing Thu, Sep 17 from San Francisco to Seoul, returning Wed, Oct 7, priced at $847 found 18 hours ago
China Eastern Airlines
Sat, Sep 5 - Fri, Oct 30
SFO
San Francisco
ICN
Seoul
$855 Roundtrip, just found
$855
Roundtrip
just found
Select China Eastern Airlines flight, departing Sat, Sep 5 from San Francisco to Seoul, returning Fri, Oct 30, priced at $855 just found
Alaska Airlines
Sat, Aug 29 - Wed, Sep 30
SFO
San Francisco
ICN
Seoul
$875 Roundtrip, just found
$875
Roundtrip
just found
Select Alaska Airlines flight, departing Sat, Aug 29 from San Francisco to Seoul, returning Wed, Sep 30, priced at $875 just found

Alternative airports near Seoul

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Gimpo Intl. GMP. Closest option available. Average driving time to city center is 20 minutes. Flights from $1,051
GMP
Gimpo Intl.
Closest
Average driving time to city center20 min
Flights from $1,051

Find the cheapest month to fly from San Francisco (SFO) to Seoul (ICN)

September is typically the cheapest month to fly

From $681 - $935 per traveler.

What you need to know for your flight from San Francisco Intl. to Incheon Intl.

San Francisco (SFO) to Seoul (ICN) at a glance

Travel from San Francisco (SFO) to Seoul (ICN) with a range of airlines on this international long-haul route. Choose from full-service options or budget-friendly carriers to discover the best prices and schedules that suit your travel plans. Whether you’re eager to explore Seoul's iconic attractions or vibrant neighborhoods, you'll find all the essential information for flights from San Francisco International Airport to Incheon International Airport right here.

  • Fastest flight duration: around 12h 45m non-stop
  • Route distance: roughly 5,700 miles (9,170 km)
  • Flights per week: around 25+ flights with multiple daily departures on average
  • Typical fares (one-way): economy tickets often range from $330–$950, depending on seasonality and how far ahead you book

Flights from San Francisco International Airport (SFO) to Incheon International Airport (ICN)

According to recent traveler bookings, here are the top airlines favored for flights from San Francisco to Seoul, highlighting both non-stop and one-stop options. Common layover points include Vancouver International Airport (YVR) with an approximate 2h 45m layover, Hong Kong International Airport (HKG) at about 2h 30m, and Seattle-Tacoma International Airport (SEA) with a 3h 30m layover. These choices offer you the opportunity to balance price, total travel time, and cabin class to discover the best travel itinerary.

  • United: This full-service airline provides non-stop flights, with one-way fares usually between $330 and $1205, representing around 41% of departures on this route, and a total travel time of 12 hours and 45 minutes.
  • Asiana Airlines: Another full-service carrier, Asiana offers non-stop options, with one-way prices generally ranging from $350 to $1405. They account for roughly 20% of departures on this route, with a total journey duration of 12 hours and 45 minutes.
  • Air Premia: A full-service airline offering non-stop services, Air Premia's one-way fares typically fall between $330 and $1100, covering about 15% of departure flights on this route, with a total journey time of 12 hours and 45 minutes.
  • Korean Air: This full-service airline provides both non-stop and one-stop services, with one-way fares generally ranging from $405 to $2280. Korean Air accounts for about 12% of departures, boasting a non-stop journey time of 12 hours and 45 minutes.
  • Delta: As a full-service carrier, Delta offers both non-stop and one-stop services, with one-way fares typically priced from $440 to $3355, representing roughly 4% of departures on this route, maintaining a non-stop journey time of 12 hours and 45 minutes.

Travelers have the option to enhance their journey from San Francisco to Seoul with upgraded flight choices. United Airlines provides both business class and premium economy, while Air Premia also features premium economy. Asiana Airlines showcases its business class for a luxurious experience.

Best time to fly from San Francisco (SFO) to Seoul (ICN)

The most popular months for travelers flying from San Francisco to Seoul are March, April, and June, when peak temperatures in Seoul reach up to 70.9°F in June. If you prefer quieter travel, consider August, the least busy time to visit with temperatures around 79°F and typically the lowest average one-way fare (around $465). Flight availability peaks in June, with approximately 37 flights per week, making it easier to find convenient departure times. January has the fewest flights, with approximately 20 flights per week.

  • Cheapest time to fly: August usually offers good deals with average one-way fare around $465, roughly 21% cheaper than the yearly average.
  • Another budget-friendly time to fly: January typically offers an average one-way fare of around $485.
  • Most flight options: June has the highest number of flights from San Francisco to Seoul, with approximately 37 flights per week, giving you more flexibility in scheduling your trip.
calendar iconMonthtemperature iconTemperaturecrowd level iconDemandflights iconWeekly Flightsprice iconAverage one-way Fare
January29.3°F (-1.5°C)Low20$485
February33.6°F (0.9°C)Average22$518
March43.0°F (6.1°C)High32$555
April52.7°F (11.5°C)High28$581
May62.4°F (16.9°C)Average29$587
June70.9°F (21.6°C)High37$769
July77.0°F (25.0°C)Low24$568
August79.0°F (26.1°C)Low25$465
September72.1°F (22.3°C)Average28$515
October61.0°F (16.1°C)Average29$634
November48.0°F (8.9°C)Average26$522
December33.4°F (0.8°C)Average25$887

*Average one-way fare is based on Expedia flight booking data from January 2025 to April 2026 for the specified route and travel class and may change depending on availability, dates, and demand.

Alternative route from San Francisco (SFO) to Seoul (ICN)

  • Oakland to Seoul (OAK-ICN): Located approximately 12 miles from San Francisco International Airport (SFO), Oakland International Airport (OAK) offers a convenient departure point. On this route, one-way economy ticket prices generally fall between $330 and $780, influenced by the time of year and when you make your reservation. Typically, travelers can expect one-stop flights, with common layover cities being Seattle-Tacoma International Airport (SEA) and Salt Lake City International Airport (SLC). Major airlines serving this route include Delta and Alaska Airlines.

How to find the best prices for flights from San Francisco (SFO) to Seoul (ICN)

Getting some of the best deals on flights from San Francisco to Seoul is all about timing and flexibility. Here are some key tips to help you save:

  1. Best times to book and fly: cheaper fares are usually found when booking at least two months in advance, which aligns with when most travelers make their reservations. Evening departures between 6 PM and midnight tend to offer these lower prices and are the most popular flight times. Additionally, flying on Friday provides both affordable rates and is the busiest travel day.
  2. Set up price alerts: stay updated on price changes by using Expedia's Price Tracker. Receive alerts when fares drop for your selected route.
  3. Bundle and save: bundle your flight and hotel to save on Expedia, or unlock a hotel deal after booking your flight.*
  4. Compare flight options: use Expedia's search tool to compare airlines, routes, direct vs. non-direct flights, and flight times. You can also sort by price to find the most affordable options.
  5. Stay flexible with dates: being open to different travel days can sometimes help you find better prices on flights and hotels.
  6. Think about luggage: nowadays, it's important to check the airline's baggage policies to find the best value. That may be paying for an additional carry-on bag or booking a ticket with checked luggage included. Either way, double-check your allowance before confirming your booking to avoid excess baggage fees at the airport.

*Members only. Savings vary and are not available on all bundles. Select hotels.

Arriving at Incheon International Airport from San Francisco International Airport

Seoul welcomes travelers from San Francisco with a range of transport options based on price, convenience, and proximity. Here's how to reach Seoul efficiently:

  • Hotel transfer: Transfers offer a convenient way to reach your hotel in Seoul, with private rides that can be arranged in advance.
  • Car rental: Renting a car from Incheon International Airport is a great option if you plan to explore and sightsee beyond the city. Browse cheap car rentals at Incheon International Airport on Expedia.
  • Taxi/ride-hailing: Taxis and ride-hailing services may be available from designated pickup areas outside the terminal, check locally on arrival.
  • Public transportation: From Incheon International Airport, Incheon Int'l Airport Terminal 2 Station, a metro station, is located about 0.1 miles from the airport and can be reached on foot, while Yongyu Station, a train station, is situated approximately 3.6 miles away and is accessible by car.

Frequently asked questions

How much does a flight from San Francisco, CA (SFO-San Francisco Intl.) to Seoul (ICN-Incheon Intl.) cost?
You can find cheap one-way flights from $349 and cheap return flights from $643 San Francisco, CA (SFO-San Francisco Intl.) to Seoul (ICN-Incheon Intl.) with Expedia. One-way flights usually range from $469 to $4371, and return flights typically cost between $907 and $7466. Flight prices vary based on the month and day of the week you want to travel, as well as the airline and how far in advance you book your ticket. Filter your search on Expedia by "Price (lowest to highest)" to see the cheapest fares first, and use the Price Tracking tool to receive alerts when San Francisco, CA (SFO-San Francisco Intl.) to Seoul (ICN-Incheon Intl.) ticket fares go up or down.*Typical price ranges based on flights available on Expedia in the last year. Prices include multi-airline options.
What is the cheapest month to fly from San Francisco, CA (SFO-San Francisco Intl.) to Seoul (ICN-Incheon Intl.)?
The cheapest month to fly from SFO to ICN is August when demand is low. Traveling in off-peak or shoulder months is usually a good way to secure cheap tickets, just remember to avoid flying during holidays if you're able to. Use the calendar view in your search to see which months have low fares on this route.
Which airlines fly direct from San Francisco, CA (SFO-San Francisco Intl.) to Seoul (ICN-Incheon Intl.)?
4 airlines operate nonstop service from SFO to ICN:

  • United operates around 14 direct flights from SFO to ICN every week
  • Asiana Airlines operates around 7 direct flights from SFO to ICN every week
  • Korean Air operates around 7 direct flights from SFO to ICN every week
  • Aero Lloyd operates around 7 direct flights from SFO to ICN every week

What is the cheapest airline that flies from San Francisco, CA (SFO-San Francisco Intl.) to Seoul (ICN-Incheon Intl.)?
EVA Airways is one of the cheapest airlines offering connecting flights from San Francisco, CA (SFO) to Seoul (ICN), with round-trip tickets starting from around $889. Use Expedia's search tool to compare the prices and schedules of airlines that fly this route to find the best option for your plans and budget.*Prices based on flights available on Expedia in the last year.
How do I find cheap flights from San Francisco, CA (SFO-San Francisco Intl.) to Seoul (ICN-Incheon Intl.)?
To find a cheap flight from San Francisco, CA (SFO-San Francisco Intl.) to Seoul (ICN-Incheon Intl.), be flexible with your dates. Traveling outside of peak vacation months and booking a mid-week flight can help you save. Early morning and late night flights are often more affordable, too. Expedia allows you to compare flight times, airlines and routes all in one place to find low fares. You can also set up Price Tracking and receive alerts when fares go up or down.
What is the best airline to fly with from San Francisco, CA (SFO-San Francisco Intl.) to Seoul (ICN-Incheon Intl.)?
The best airline to fly with from San Francisco (SFO) to Seoul (ICN) will differ from traveler to traveler. If you like to fly early, Korean Air offers early morning flights. If price is the most important factor, Aero Lloyd typically offers the lowest fares. United offers the most daily flights from SFO to ICN, which is great if flexibility is what you value most. The best carrier for this journey could also be the one you have a loyalty membership with, as flying with that airline or another airline within the same alliance could help you collect points or enjoy lounge access.
What is the best time to fly from San Francisco, CA (SFO-San Francisco Intl.) to Seoul (ICN-Incheon Intl.)?
The best time to fly is usually mid-week (Tuesday or Wednesday) and during early morning hours as flights tend to be cheaper, less crowded, and generally more on-time. Avoid major holidays and peak vacation seasons for smoother travel. Combining off-peak days and hours often gives the best combination of cost, comfort, and convenience.
How many flights per day from San Francisco, CA (SFO-San Francisco Intl.) to Seoul (ICN-Incheon Intl.)?
On average, there are around 5 nonstop flights per day from San Francisco Intl. (SFO) to Incheon Intl. (ICN). For more options, look at flights that include layovers.
What is the earliest flight from San Francisco, CA (SFO-San Francisco Intl.) to Seoul (ICN-Incheon Intl.)?
The earliest flight from San Francisco International Airport (SFO) to Incheon International Airport (ICN) typically leaves at around 12:05 AM, operated by Cathay Pacific and Air China. This seasonal service is active in August, giving you a great opportunity to start your journey to South Korea early. To compare early flights on Expedia, select the "Early Morning" and "Morning" filters in your search.
What are the most popular departure times for flights from San Francisco, CA (SFO-San Francisco Intl.) to Seoul (ICN-Incheon Intl.)?
The most popular departure times for flights from San Francisco International Airport (SFO) to Incheon International Airport (ICN) are in the late evening, from 9pm to midnight. About 21% of passengers prefer this time window. Many major carriers, including Cathay Pacific, United, and Asiana Airlines, offer flights during this window. This timing works well because it allows you to enjoy a full day in San Francisco before your flight.
How long does it take to fly from San Francisco, CA (SFO-San Francisco Intl.) to Seoul (ICN-Incheon Intl.)?
Flying nonstop from SFO to ICN takes around 13 hours, with the route covering approximately 5,646 miles. Flights with a layover typically take 4 hours 20 minutes longer than direct options. Keep in mind that actual flight times can vary due to wind patterns, weather, and air traffic.
Can you fly business or first class from San Francisco, CA (SFO-San Francisco Intl.) to Seoul (ICN-Incheon Intl.)?
You can fly business class between SFO and ICN. Airlines that offer business class service on this route include:

  • Cathay Pacific
  • Singapore Airlines
  • Korean Air
  • Air Canada
  • EVA Airways
  • United Airlines
  • Asiana Airlines
  • China Airlines
  • All Nippon Airways
  • Emirates

First class cabins are available on:

  • Emirates
  • American Airlines
  • Delta Air Lines
  • Korean Air
  • British Airways

How much is a business class flight from San Francisco, CA (SFO-San Francisco Intl.) to Seoul (ICN-Incheon Intl.)?
A direct, return business class ticket from San Francisco (SFO) to Seoul (ICN) typically costs between $6,431 - $11,457. A non-stop, one-way business class flight is usually around $3,762 - $8,239. Prices often fluctuate based on seasonality and how early you book. You may also be able to find a cheaper business class journey between San Francisco, CA (SFO-San Francisco Intl.) to Seoul (ICN-Incheon Intl.) if you opt for a connecting flight.*Prices based on flights available on Expedia in the last year.
How do I earn miles on a San Francisco, CA (SFO-San Francisco Intl.) to Seoul (ICN-Incheon Intl.) flight with Expedia?
It's easy to earn miles on a San Francisco, CA (SFO-San Francisco Intl.) to Seoul (ICN-Incheon Intl.) flight when you book with Expedia. Before you confirm your booking, simply select your frequent flyer program and enter your program number. As a member of One Key™, you can also earn OneKeyCash™* on top of your airline miles when you book with Expedia.*Excludes taxes and fees. OneKeyCash is not redeemable for cash and can only be used on Expedia and other participating brands.
What airports do you fly into for Seoul from San Francisco Intl. (SFO)?
When traveling from San Francisco Intl. (SFO) to Seoul, you can fly into Gimpo Intl. (GMP) and Incheon Intl. (ICN). Some flights may connect through major hubs like Los Angeles Intl. (LAX), Vancouver Intl. (YVR), Dallas-Fort Worth Intl. (DFW) before reaching Seoul. Compare routes and airports on Expedia to find the best flight options for your travel plans.
Is it cheaper to buy a plane ticket from San Francisco, CA (SFO-San Francisco Intl.) to Seoul (ICN-Incheon Intl.) at the last minute?
Typically, booking a last minute flight from San Francisco, CA (SFO-San Francisco Intl.) to Seoul (ICN-Incheon Intl.) will be more expensive than booking in advance. As the departure date approaches, there are usually fewer seats available which can drive up the cost. However, if there's some wiggle room with your travel dates and times, you could bag a cheap last-minute fare.
Is it cheaper to book a San Francisco, CA (SFO-San Francisco Intl.) to Seoul (ICN-Incheon Intl.) flight and hotel package?
Securing a San Francisco, CA (SFO-San Francisco Intl.) to Seoul (ICN-Incheon Intl.) Incheon Vacation Packages is usually cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your travels all in one place. Select from our extensive range of stays and then add flights, activities and car rentals to your booking. Bundle everything together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from San Francisco, CA (SFO-San Francisco Intl.) to Seoul (ICN-Incheon Intl.)?
If you booked your San Francisco, CA (SFO-San Francisco Intl.) to Seoul (ICN-Incheon Intl.) flight within the last 24 hours, you may be able to modify or cancel it without any fees. Depending on the airline and the type of ticket you have, additional charges may apply for changes beyond this timeframe. Airline policies and contact information can be found in your itinerary or confirmation email. Or, head to our Customer Service portal if you'd like more information.

Travel information

Origin airport
San Francisco Intl.
Destination airport
Incheon Intl.
Airlines serving
Aeromexico, Air Canada, Air China, Air Premia, Alaska Airlines, American Airlines, Asiana Airlines, Cathay Pacific, China Airlines, China Eastern Airlines, China Southern Airlines, Delta, EVA Airways, Emirates, Finnair, Korean Air, Philippine Airlines, United, Vietnam Airlines, WestJet
Roundtrip price
$642
Distance
5645 mi
Average flight time
28 hours 30 mins

Book with confidence

San Francisco to Seoul Flights

The cheapest times to fly from San Francisco to Seoul

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from San Francisco to Seoul are during the month of August. You can find some of the cheapest flights from San Francisco to Seoul with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from San Francisco to Seoul

Sunday is one of the best days to book for cheap flights from San Francisco to Seoul: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from San Francisco to Seoul

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from San Francisco to Seoul in 2026. You can also book with separate airlines for your outbound and return journeys, from $349 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap San Francisco to Seoul flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your San Francisco to Seoul airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

San Francisco to Seoul Flights

*Flight schedules are subject to change.

*Available to One Key members.

 

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