$366 Cheap Flights from San Francisco (SFO) to Seoul (ICN)

View $366 flight on Fri, Jul 4, 2025Opens in a new window

  • Plan, book, fly with confidence

  • trending down icon
    Be in the know
    Get alerts if flight prices drop or rise*
  • bex rewards loyalty icon
    Book smarter
    Save up to 30% on select hotels after you book a flight*
  • one key icon
    Earn twice
    Earn your airline miles on top of our OneKeyCash
    Learn about One Key
Find available prices by choosing your travel dates.

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

Prices were available within the past 7 days and start at $366 for one-way flights and $661 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Air Premia
Fri, May 2 - Fri, May 9
SFO
San Francisco
ICN
Seoul
$661 Roundtrip, just found
$661
Roundtrip
just found
Select Air Premia flight, departing Fri, May 2 from San Francisco to Seoul, returning Fri, May 9, priced at $661 just found
Hawaiian Airlines
Fri, Mar 6 - Fri, Mar 13
SFO
San Francisco
ICN
Seoul
$676 Roundtrip, found 2 hours ago
$676
Roundtrip
found 2 hours ago
Select Hawaiian Airlines flight, departing Fri, Mar 6 from San Francisco to Seoul, returning Fri, Mar 13, priced at $676 found 2 hours ago
Alaska Airlines
Thu, Jan 22 - Sun, Feb 1
SFO
San Francisco
ICN
Seoul
$693 Roundtrip, found 10 hours ago
$693
Roundtrip
found 10 hours ago
Select Alaska Airlines flight, departing Thu, Jan 22 from San Francisco to Seoul, returning Sun, Feb 1, priced at $693 found 10 hours ago
China Eastern Airlines
Mon, May 12 - Fri, May 30
SFO
San Francisco
ICN
Seoul
$702 Roundtrip, just found
$702
Roundtrip
just found
Select China Eastern Airlines flight, departing Mon, May 12 from San Francisco to Seoul, returning Fri, May 30, priced at $702 just found
Asiana Airlines
Sat, Aug 23 - Thu, Sep 11
SFO
San Francisco
ICN
Seoul
$758 Roundtrip, just found
$758
Roundtrip
just found
Select Asiana Airlines flight, departing Sat, Aug 23 from San Francisco to Seoul, returning Thu, Sep 11, priced at $758 just found
United
Tue, Jan 27 - Wed, Feb 11
SFO
San Francisco
ICN
Seoul
$766 Roundtrip, found 18 hours ago
$766
Roundtrip
found 18 hours ago
Select United flight, departing Tue, Jan 27 from San Francisco to Seoul, returning Wed, Feb 11, priced at $766 found 18 hours ago
Cathay Pacific
Mon, Apr 28 - Tue, May 13
SFO
San Francisco
ICN
Seoul
$780 Roundtrip, just found
$780
Roundtrip
just found
Select Cathay Pacific flight, departing Mon, Apr 28 from San Francisco to Seoul, returning Tue, May 13, priced at $780 just found
Air Canada
Sun, Oct 19 - Wed, Oct 29
SFO
San Francisco
ICN
Seoul
$851 Roundtrip, just found
$851
Roundtrip
just found
Select Air Canada flight, departing Sun, Oct 19 from San Francisco to Seoul, returning Wed, Oct 29, priced at $851 just found
Vietnam Airlines
Wed, Sep 10 - Wed, Nov 12
SFO
San Francisco
ICN
Seoul
$857 Roundtrip, just found
$857
Roundtrip
just found
Select Vietnam Airlines flight, departing Wed, Sep 10 from San Francisco to Seoul, returning Wed, Nov 12, priced at $857 just found
Korean Air
Sat, Aug 23 - Thu, Sep 11
SFO
San Francisco
ICN
Seoul
$863 Roundtrip, just found
$863
Roundtrip
just found
Select Korean Air flight, departing Sat, Aug 23 from San Francisco to Seoul, returning Thu, Sep 11, priced at $863 just found
Flights from San Francisco (SFO) to Seoul (ICN)
Origin airport
San Francisco Intl.
Destination airport
Incheon Intl.
Airlines serving
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, Hawaiian Airlines, Japan Airlines, Korean Air, Philippine Airlines, Turkish Airlines, United, Vietnam Airlines, WestJet
Roundtrip price
$661
Distance
5645 mi

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 May. 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 2025. You can also book with separate airlines for your outbound and return journeys, from $366 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.

Frequently asked questions

How much does a flight from San Francisco Intl. Airport (SFO) to Incheon Intl. Airport (ICN) cost?
Pick up cheap return fares starting from $585 from San Francisco Intl. Airport (SFO) to Incheon Intl. Airport (ICN). This information is based on the cheapest price found on Expedia for this return journey departing within the next three months. This airfare is for a Air Premia flight leaving SFO on May 21 2025 and touching down at ICN. The price was last updated on April 24 2025 and has not changed since.
What is the cheapest month to fly from SFO to ICN?
The cheapest flights from SFO to ICN are usually during off-peak season, when demand is lower. To save money, avoid flying during public holidays, school breaks and major local events.
Which airlines fly direct from San Francisco Intl. Airport (SFO) to Incheon Intl. Airport (ICN)?
Fly straight to Incheon Intl. Airport (ICN). 4 carriers operate direct routes from San Francisco Intl. Airport (SFO), including:

  • United Airlines
  • Asiana Airlines
  • Korean Air

What is the cheapest airline that flies from SFO to ICN?
Travel from SFO to ICN with Air Premia. This airline currently offers the cheapest one-way ticket on this route, starting from $352. This fare is based on the lowest price found on Expedia departing within the next three months. The flight takes off from SFO on July 16 2025. Prices were last updated on April 24 2025 and have not changed since.
How many flights per day from San Francisco Intl. Airport (SFO) to Incheon Intl. Airport (ICN)?
When taking off from San Francisco Intl. Airport (SFO), you can take your pick from an average of 5 daily direct flights to Incheon Intl. Airport (ICN).
What are the most popular departure times for flights from San Francisco Intl. Airport (SFO) to Incheon Intl. Airport (ICN)?
The 11 PM departures from SFO to ICN are the top choice for many travelers. These flights can come with a higher price due to their popularity. If you want to save on your fare, book during off-peak hours.
What day of the week has the most flights from SFO to ICN?
Friday has the most flights from San Francisco Intl. Airport (SFO) to Incheon Intl. Airport (ICN). Consider taking off on this day and you’ll have the best chance of finding a departure that fits your schedule.
What is the earliest flight from San Francisco Intl. Airport (SFO) to Incheon Intl. Airport (ICN)?
The earliest flight jetting off from San Francisco Intl. Airport (SFO) is at around 10:30AM UTC-8. Board this plane and you’ll arrive at Incheon Intl. Airport (ICN) at approximately 4:15PM UTC+9. The total flight duration is 12h 45m.
How long does it take to fly from San Francisco Intl. Airport (SFO) to Incheon Intl. Airport (ICN)?
The average flight duration from SFO to ICN is 12 hours and 55 minutes, covering a total distance of 5,700 mi.
What airline has the least delays from SFO to ICN?
Consider booking with Korean Air if you’d like to go straight from San Francisco Intl. Airport (SFO) to Incheon Intl. Airport (ICN) without any interruptions. This carrier has the best track record for punctuality, with an on-time score of 84%. Want to be updated if anything changes? You can check your flight status using the Expedia App.
What is the best time to fly from San Francisco Intl. Airport (SFO) to Incheon Intl. Airport (ICN)?
Opt for a flight from San Francisco Intl. Airport (SFO) to Incheon Intl. Airport (ICN) that takes off before 3 PM to reduce the risk of cancellations. Departures after this time are on average 22% more likely to be canceled.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG’s global flight data platform.
What airports do you fly into for Seoul from San Francisco Intl. Airport (SFO)?
If you’re taking a direct flight from San Francisco Intl. Airport (SFO) to Seoul, Incheon Intl. Airport (ICN) is the only airport you can land at.
Is it cheaper to buy a plane ticket from San Francisco Intl. Airport (SFO) to Incheon Intl. Airport (ICN) last-minute?
Holding off until just before your departure to book a flight from SFO to ICN generally means paying more. Although you may find some last-minute discounts, they’re not always guaranteed. Allow some flexibility in your schedule to maximize your chances of landing a bargain.
Is it cheaper to book a SFO to ICN flight and hotel package?
Booking a SFO to ICN flight and hotel package is usually cheaper than booking separately. With Expedia, you can enjoy the convenience of organizing your travels in one place. Select from our extensive range of stays and then add activities, car rentals and flights to your booking. Bundle it all together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from San Francisco Intl. Airport (SFO) to Incheon Intl. Airport (ICN)?
Typically, it’s possible to cancel or reschedule your SFO to ICN flight. However, for bookings made more than 24 hours ago, additional fees may apply. Check your airline’s policies in your itinerary to see what changes are possible and whether any costs are involved. You’ll also find further details on our Customer Service portal.

Explore a world of travel with Expedia

*Available to One Key members.