$79 Cheap Flights from Seattle (SEA) to Boise (BOI)

View $79 flight on Sat, May 16, 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 $79 for one-way flights and $137 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Alaska Airlines
Tue, May 12 - Sat, May 16
SEA
Seattle
BOI
Boise
$137 Roundtrip, found 2 hours ago
$137
Roundtrip
found 2 hours ago
Select Alaska Airlines flight, departing Tue, May 12 from Seattle to Boise, returning Sat, May 16, priced at $137 found 2 hours ago
Delta
Sat, Apr 18 - Mon, Apr 20
SEA
Seattle
BOI
Boise
$147 Roundtrip, found 1 hour ago
$147
Roundtrip
found 1 hour ago
Select Delta flight, departing Sat, Apr 18 from Seattle to Boise, returning Mon, Apr 20, priced at $147 found 1 hour ago
Southwest Airlines
Tue, May 5 - Wed, May 6
SEA
Seattle
BOI
Boise
$157 Roundtrip, found 3 hours ago
$157
Roundtrip
found 3 hours ago
Select Southwest Airlines flight, departing Tue, May 5 from Seattle to Boise, returning Wed, May 6, priced at $157 found 3 hours ago
Alaska Airlines
Wed, Apr 15 - Sun, Apr 19
SEA
Seattle
BOI
Boise
$157 Roundtrip, found 1 hour ago
$157
Roundtrip
found 1 hour ago
Select Alaska Airlines flight, departing Wed, Apr 15 from Seattle to Boise, returning Sun, Apr 19, priced at $157 found 1 hour ago
Southwest Airlines
Wed, Apr 22 - Sat, May 2
SEA
Seattle
BOI
Boise
$162 Roundtrip, found 8 hours ago
$162
Roundtrip
found 8 hours ago
Select Southwest Airlines flight, departing Wed, Apr 22 from Seattle to Boise, returning Sat, May 2, priced at $162 found 8 hours ago
Southwest Airlines
Thu, May 14 - Tue, May 19
SEA
Seattle
BOI
Boise
$164 Roundtrip, found 5 days ago
$164
Roundtrip
found 5 days ago
Select Southwest Airlines flight, departing Thu, May 14 from Seattle to Boise, returning Tue, May 19, priced at $164 found 5 days ago
Alaska Airlines
Tue, May 5 - Wed, May 6
SEA
Seattle
BOI
Boise
$167 Roundtrip, found 3 hours ago
$167
Roundtrip
found 3 hours ago
Select Alaska Airlines flight, departing Tue, May 5 from Seattle to Boise, returning Wed, May 6, priced at $167 found 3 hours ago
Southwest Airlines
Wed, May 6 - Fri, May 8
SEA
Seattle
BOI
Boise
$172 Roundtrip, found 1 hour ago
$172
Roundtrip
found 1 hour ago
Select Southwest Airlines flight, departing Wed, May 6 from Seattle to Boise, returning Fri, May 8, priced at $172 found 1 hour ago
United
Sat, Apr 18 - Mon, Apr 20
SEA
Seattle
BOI
Boise
$187 Roundtrip, found 1 hour ago
$187
Roundtrip
found 1 hour ago
Select United flight, departing Sat, Apr 18 from Seattle to Boise, returning Mon, Apr 20, priced at $187 found 1 hour ago
American Airlines
Tue, Apr 7 - Sat, Apr 11
SEA
Seattle
BOI
Boise
$654 Roundtrip, found 21 hours ago
$654
Roundtrip
found 21 hours ago
Select American Airlines flight, departing Tue, Apr 7 from Seattle to Boise, returning Sat, Apr 11, priced at $654 found 21 hours ago

Find the cheapest month to fly from Seattle (SEA) to Boise (BOI)

January is typically the cheapest month to fly

From $76 - $137 per traveler.
Flights from Seattle (SEA) to Boise (BOI)
Origin airport
Seattle - Tacoma Intl.
Destination airport
Boise
Airlines serving
Alaska Airlines, American Airlines, Delta, Southwest Airlines, United
Roundtrip price
$137
Distance
397 mi
Average flight time
2 hours 23 mins

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 May. 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 $79 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.

 

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 $79 and cheap return flights from $137 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 May 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.

*Flight schedules are subject to change.

Explore a world of travel with Expedia

*Available to One Key members.