$105 Cheap Flights from Seattle (SEA) to Boise (BOI)

View $105 flight on Wed, Aug 5, 2026Opens in a new window

Popular airlines from Seattle-Tacoma International Airport (SEA) to Boise Airport (BOI)

Cheap Flights from Seattle to Boise (SEA-BOI)

Prices were available within the past 7 days and start at $105 for one-way flights and $196 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Bargain Flight
Tue, Sep 1 - Sat, Sep 5
SEA
Seattle
BOI
Boise
$196 Roundtrip, just found
$196
Roundtrip
just found
Select Bargain Flight flight, departing Tue, Sep 1 from Seattle to Boise, returning Sat, Sep 5, priced at $196 just found
Delta
Tue, Sep 1 - Sat, Sep 5
SEA
Seattle
BOI
Boise
$197 Roundtrip, just found
$197
Roundtrip
just found
Select Delta flight, departing Tue, Sep 1 from Seattle to Boise, returning Sat, Sep 5, priced at $197 just found
Alaska Airlines
Wed, Aug 19 - Tue, Aug 25
SEA
Seattle
BOI
Boise
$202 Roundtrip, found 11 hours ago
$202
Roundtrip
found 11 hours ago
Select Alaska Airlines flight, departing Wed, Aug 19 from Seattle to Boise, returning Tue, Aug 25, priced at $202 found 11 hours ago
Bargain Flight
Wed, Sep 30 - Sun, Oct 4
SEA
Seattle
BOI
Boise
$206 Roundtrip, found 1 hour ago
$206
Roundtrip
found 1 hour ago
Select Bargain Flight flight, departing Wed, Sep 30 from Seattle to Boise, returning Sun, Oct 4, priced at $206 found 1 hour ago
Alaska Airlines
Sat, Aug 22 - Sat, Aug 29
SEA
Seattle
BOI
Boise
$207 Roundtrip, just found
$207
Roundtrip
just found
Select Alaska Airlines flight, departing Sat, Aug 22 from Seattle to Boise, returning Sat, Aug 29, priced at $207 just found
Southwest Airlines
Tue, Aug 25 - Wed, Sep 2
SEA
Seattle
BOI
Boise
$210 Roundtrip, found 7 hours ago
$210
Roundtrip
found 7 hours ago
Select Southwest Airlines flight, departing Tue, Aug 25 from Seattle to Boise, returning Wed, Sep 2, priced at $210 found 7 hours ago
Alaska Airlines
Thu, Aug 27 - Wed, Sep 2
SEA
Seattle
BOI
Boise
$212 Roundtrip, found 11 hours ago
$212
Roundtrip
found 11 hours ago
Select Alaska Airlines flight, departing Thu, Aug 27 from Seattle to Boise, returning Wed, Sep 2, priced at $212 found 11 hours ago
Southwest Airlines
Tue, Sep 1 - Sat, Sep 5
SEA
Seattle
BOI
Boise
$214 Roundtrip, just found
$214
Roundtrip
just found
Select Southwest Airlines flight, departing Tue, Sep 1 from Seattle to Boise, returning Sat, Sep 5, priced at $214 just found
Bargain Flight
Fri, Oct 23 - Sun, Oct 25
SEA
Seattle
BOI
Boise
$215 Roundtrip, just found
$215
Roundtrip
just found
Select Bargain Flight flight, departing Fri, Oct 23 from Seattle to Boise, returning Sun, Oct 25, priced at $215 just found
United
Tue, Aug 25 - Wed, Sep 2
SEA
Seattle
BOI
Boise
$217 Roundtrip, found 7 hours ago
$217
Roundtrip
found 7 hours ago
Select United flight, departing Tue, Aug 25 from Seattle to Boise, returning Wed, Sep 2, priced at $217 found 7 hours ago

What you need to know for your flight from Seattle - Tacoma Intl. to Boise

Seattle (SEA) to Boise (BOI) at a glance

Explore a range of options for Seattle to Boise flights, featuring various airlines that operate on this domestic short-haul route. You can easily compare full-service and low-cost carriers to discover the best itinerary that aligns with your budget and schedule. As you plan your trip to Boise, known for its iconic sights and vibrant neighborhoods, be sure to check out the latest deals on flights from Seattle - Tacoma International Airport (SEA) to Boise Airport (BOI).

  • Fastest flight duration: around 1h 30m non-stop
  • Route distance: roughly 400 miles (645 km)
  • Flights per week: around 50+ flights with multiple daily departures on average
  • Typical fares (one-way): economy tickets often range from $50–$290, depending on seasonality and how far ahead you book

Flights from Seattle - Tacoma International Airport (SEA) to Boise Airport (BOI)

Based on recent traveler bookings, here are the top airlines favored for flights from Seattle to Boise, including both non-stop and one-stop options. Popular layover spots include Portland International Airport (PDX) with a 1 hour and 15-minute layover, Spokane International Airport (GEG) with around a 3-hour layover, and San Francisco International Airport (SFO) offering about a 1 hour and 30-minute layover. This variety allows you to balance price, total travel time, and cabin class to secure the best itinerary.

  • Alaska Airlines: This full-service airline provides both non-stop and one-stop options, with one-way ticket prices generally falling between $60 and $310. It represents about 55% of the departures on this route, with a typical non-stop flight duration of 1 hour and 30 minutes.
  • Delta: Another full-service option, Delta offers non-stop flights with one-way fares usually ranging from $50 to $320. They account for around 43% of departures on this route, with an estimated travel time of 1 hour and 30 minutes.
  • Hawaiian Airlines: This full-service carrier specializes in non-stop flights, with one-way fares typically between $70 and $225. It makes up roughly 2% of the departures on this route, with an overall journey time of 1 hour and 30 minutes.
  • Southwest Airlines: As a low-cost airline, Southwest provides one-stop services, with one-way fares generally ranging from $55 to $280. Expect about 2 hours and 15 minutes in-flight, with a total travel time of approximately 5 hours and 30 minutes, including layover time.
  • United: This full-service airline offers various services, with one-way fares typically between $105 and $385. Flights take about 2 hours and 15 minutes, and the total journey time is around 5 hours and 30 minutes, including layovers.

Travelers flying from Seattle to Boise can enhance their journey by upgrading to a premium cabin. Delta provides both first class and premium economy options, while Alaska Airlines features first class and business class for added comfort.

Best time to fly from Seattle (SEA) to Boise (BOI)

The most popular months for travelers flying from Seattle to Boise are January, March, and April, when peak temperatures in Boise reach up to 48.6°F in April. If you prefer quieter travel, consider November, the least busy and relatively cheaper time to visit with fewer crowds and temperatures around 38.7°F. For better deals, April usually offers the lowest average one-way fare around $138. Flight availability peaks in May and December, with approximately 55 flights per week, making it easier to find convenient departure times. January, April, and October have the fewest flights, with approximately 46 flights per week.

  • Cheapest time to fly: April usually offers good deals with average one-way fare around $138, roughly 8% cheaper than the yearly average.
  • More budget-friendly months to fly: January, November, and August typically offer average one-way fares of around $144.
  • Most flight options: May and December have the highest number of flights from Seattle to Boise, with approximately 55 flights per week, giving you more flexibility in scheduling your trip.
calendar iconMonthtemperature iconTemperaturecrowd level iconDemandflights iconWeekly Flightsprice iconAverage one-way Fare
January29.5°F (-1.4°C)Moderately High46$143
February33.8°F (1.0°C)Average47$147
March41.7°F (5.4°C)Moderately High54$162
April48.6°F (9.2°C)Moderately High46$138
May57.7°F (14.3°C)Average55$151
June67.1°F (19.5°C)Moderately Low51$154
July78.1°F (25.6°C)Average53$158
August76.1°F (24.5°C)Average52$146
September66.4°F (19.1°C)Moderately Low47$161
October51.8°F (11.0°C)Average46$156
November38.7°F (3.7°C)Moderately Low49$144
December29.5°F (-1.4°C)Average55$149

*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 routes from Seattle (SEA) to Boise (BOI)

  • Seattle to Boise (BFI-BOI): Boeing Field Airport (BFI) is located approximately 6 miles from Seattle - Tacoma International Airport (SEA), providing a convenient option for travelers heading to Boise.
  • Seattle to Boise (LKE-BOI): Lake Union Seaplane Base Airport (LKE) is around 13 miles distant from Seattle - Tacoma International Airport (SEA), offering another viable route for those flying to Boise.

How to find the best prices for flights from Seattle (SEA) to Boise (BOI)

Getting some of the best deals on flights from Seattle to Boise 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 2-8 weeks in advance, which aligns with when most travelers make their reservations. Afternoon departures between 12pm and 6pm often provide lower prices and are the most popular flight times. Additionally, flying on Thursday typically offers better deals, even though Friday remains 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 Boise Airport from Seattle - Tacoma International Airport

Boise welcomes travelers from Seattle with a range of transport options based on price, convenience, and proximity. For departures, Seattle - Tacoma International Airport is roughly a 20-minute drive (covering about 14 miles) from central Seattle. Here's how to reach Boise efficiently:

  • Hotel transfer: Transfers offer a convenient way to reach your hotel in Boise, with private rides that can be arranged in advance.
  • Car rental: Renting a car from Boise Airport is a great option if you plan to explore and sightsee beyond the city. Browse cheap car rentals at Boise 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 Boise Airport, Boise Station, a train station, is located about 2.4 miles away by car, while Boise Bus Station, a bus station, is situated approximately 3.8 miles away by car, providing convenient options for travelers.

Frequently asked questions

How much does a flight from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Boise, ID (BOI) cost?
You can find cheap one-way flights from $105 and cheap return flights from $196 Seattle, WA (SEA-Seattle - Tacoma Intl.) to Boise, ID (BOI) with Expedia. One-way flights usually range from $72 to $970, and return flights typically cost between $183 and $969. 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 Seattle, WA (SEA-Seattle - Tacoma Intl.) to Boise, ID (BOI) 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 Seattle, WA (SEA-Seattle - Tacoma Intl.) to Boise, ID (BOI)?
The cheapest month to fly from SEA to BOI is September 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 Seattle, WA (SEA-Seattle - Tacoma Intl.) to Boise, ID (BOI)?
Delta offers around 50 weekly direct flights from SEA to BOI.
What is the cheapest airline that flies from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Boise, ID (BOI)?
Delta is one of the cheapest airlines offering nonstop flights from Seattle, WA (SEA) to Boise, ID (BOI), starting from around $118 for a round-trip ticket. 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 Seattle, WA (SEA-Seattle - Tacoma Intl.) to Boise, ID (BOI)?
To find a cheap flight from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Boise, ID (BOI), 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 Seattle, WA (SEA-Seattle - Tacoma Intl.) to Boise, ID (BOI)?
The best airline to fly with from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Boise, ID (BOI) will differ from traveler to traveler. If you like to fly early, Delta offers early morning flights. If price is the most important factor, Delta typically offers the lowest fares. Alaska Airlines offers the most daily flights from Seattle to Boise, 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 Seattle, WA (SEA-Seattle - Tacoma Intl.) to Boise, ID (BOI)?
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 Seattle, WA (SEA-Seattle - Tacoma Intl.) to Boise, ID (BOI)?
On average, there are around 7 nonstop flights per day from Seattle - Tacoma Intl. (SEA) to (BOI). For more options, look at flights that include layovers.
What is the earliest flight from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Boise, ID (BOI)?
Sort flights by "Departure (earliest)" on Expedia to find the earliest flight from SEA to BOI. To compare more early flights, use the "Early Morning" and "Morning" filters in your search.
What are the most popular departure times for flights from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Boise, ID (BOI)?
The most popular departure times for flights from Seattle - Tacoma Intl. (SEA) to Boise (BOI) are typically between 12pm and 3pm. About 22% of passengers prefer this time window. Many major carriers, including Alaska Airlines, United Airlines, and Delta, offer flights during this window. This timing works well because it allows you to travel after a leisurely morning.
How long does it take to fly from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Boise, ID (BOI)?
Direct flights from SEA to BOI usually take about 1 hour 30 minutes, traveling roughly 398 miles. If you opt for a connecting flight, expect to add around 6 hours 20 minutes to your journey. 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 Seattle, WA (SEA-Seattle - Tacoma Intl.) to Boise, ID (BOI)?
You can fly first class between SEA and BOI. First class cabins are available on:

  • Delta Air Lines
  • United Airlines
  • American Airlines

How much is a business class flight from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Boise, ID (BOI)?
A direct, return business class ticket from Seattle, WA (SEA) to Boise, ID (BOI) typically costs between $461 - $752. A non-stop, one-way business class flight is usually around $259 - $448. Prices often fluctuate based on seasonality and how early you book. You may also be able to find a cheaper business class journey between Seattle, WA (SEA-Seattle - Tacoma Intl.) to Boise, ID (BOI) 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 Seattle, WA (SEA-Seattle - Tacoma Intl.) to Boise, ID (BOI) flight with Expedia?
It's easy to earn miles on a Seattle, WA (SEA-Seattle - Tacoma Intl.) to Boise, ID (BOI) 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.
Is it cheaper to buy a plane ticket from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Boise, ID (BOI) at the last minute?
Typically, booking a last minute flight from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Boise, ID (BOI) 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 Seattle, WA (SEA-Seattle - Tacoma Intl.) to Boise, ID (BOI) flight and hotel package?
Securing a Seattle, WA (SEA-Seattle - Tacoma Intl.) to Boise, ID (BOI) Boise 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 Seattle, WA (SEA-Seattle - Tacoma Intl.) to Boise, ID (BOI)?
If you booked your Seattle, WA (SEA-Seattle - Tacoma Intl.) to Boise, ID (BOI) 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
Seattle - Tacoma Intl.
Destination airport
Boise
Airlines serving
Alaska Airlines, American Airlines, Delta, Southwest Airlines, United
Roundtrip price
$195
Distance
397 mi
Average flight time
2 hours 30 mins

Book with confidence

Seattle to Boise Flights

The cheapest times to fly from Seattle to Boise

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 Seattle to Boise are during the month of September. You can find some of the cheapest flights from Seattle to Boise with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Seattle to Boise

Sunday is one of the best days to book for cheap flights from Seattle to Boise: 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 Seattle to Boise

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 Seattle to Boise in 2026. You can also book with separate airlines for your outbound and return journeys, from $105 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 Seattle to Boise 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 Seattle to Boise 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.

 

Seattle to Boise Flights

*Flight schedules are subject to change.

*Available to One Key members.

 

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