$76 Cheap Flights from Seattle (SEA) to Boise (BOI)

View $76 flight on Wed, Aug 20, 2025Opens in a new window

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

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Cheap Flights from Seattle to Boise (SEA-BOI)

Prices were available within the past 7 days and start at $76 for one-way flights and $117 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Alaska Airlines
Wed, Sep 3 - Tue, Sep 9
SEA
Seattle
BOI
Boise
$117 Roundtrip, just found
$117
Roundtrip
just found
Select Alaska Airlines flight, departing Wed, Sep 3 from Seattle to Boise, returning Tue, Sep 9, priced at $117 just found
Delta
Wed, Sep 3 - Tue, Sep 9
SEA
Seattle
BOI
Boise
$117 Roundtrip, just found
$117
Roundtrip
just found
Select Delta flight, departing Wed, Sep 3 from Seattle to Boise, returning Tue, Sep 9, priced at $117 just found
Alaska Airlines
Sat, Oct 25 - Tue, Oct 28
SEA
Seattle
BOI
Boise
$137 Roundtrip, found 1 hour ago
$137
Roundtrip
found 1 hour ago
Select Alaska Airlines flight, departing Sat, Oct 25 from Seattle to Boise, returning Tue, Oct 28, priced at $137 found 1 hour ago
Alaska Airlines
Wed, Sep 10 - Tue, Sep 16
SEA
Seattle
BOI
Boise
$147 Roundtrip, found 1 hour ago
$147
Roundtrip
found 1 hour ago
Select Alaska Airlines flight, departing Wed, Sep 10 from Seattle to Boise, returning Tue, Sep 16, priced at $147 found 1 hour ago
Southwest Airlines
Wed, Sep 3 - Tue, Sep 9
SEA
Seattle
BOI
Boise
$151 Roundtrip, just found
$151
Roundtrip
just found
Select Southwest Airlines flight, departing Wed, Sep 3 from Seattle to Boise, returning Tue, Sep 9, priced at $151 just found
Alaska Airlines
Wed, Sep 3 - Tue, Sep 9
SEA
Seattle
BOI
Boise
$154 Roundtrip, just found
$154
Roundtrip
just found
Select Alaska Airlines flight, departing Wed, Sep 3 from Seattle to Boise, returning Tue, Sep 9, priced at $154 just found
Delta
Wed, Sep 3 - Tue, Sep 9
SEA
Seattle
BOI
Boise
$154 Roundtrip, just found
$154
Roundtrip
just found
Select Delta flight, departing Wed, Sep 3 from Seattle to Boise, returning Tue, Sep 9, priced at $154 just found
Southwest Airlines
Sat, Oct 25 - Tue, Oct 28
SEA
Seattle
BOI
Boise
$156 Roundtrip, found 1 hour ago
$156
Roundtrip
found 1 hour ago
Select Southwest Airlines flight, departing Sat, Oct 25 from Seattle to Boise, returning Tue, Oct 28, priced at $156 found 1 hour ago
United
Wed, Sep 3 - Tue, Sep 9
SEA
Seattle
BOI
Boise
$177 Roundtrip, just found
$177
Roundtrip
just found
Select United flight, departing Wed, Sep 3 from Seattle to Boise, returning Tue, Sep 9, priced at $177 just found
Hawaiian Airlines
Wed, Sep 3 - Wed, Sep 10
PAE
Seattle
BOI
Boise
$246 Roundtrip, found 1 day ago
$246
Roundtrip
found 1 day ago
Select Hawaiian Airlines flight, departing Wed, Sep 3 from Seattle to Boise, returning Wed, Sep 10, priced at $246 found 1 day ago

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

January is typically the cheapest month to fly

From $76 - $197 per traveler.

Graph displaying average flight prices per month

Flights from Seattle (SEA) to Boise (BOI)
Origin airport
Seattle - Tacoma Intl.
Destination airport
Boise
Airlines serving
Alaska Airlines, American Airlines, Delta, Hawaiian Airlines, Southwest Airlines, United
Roundtrip price
$117
Distance
397 mi
Average flight time
2 hours 28 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 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 2025. You can also book with separate airlines for your outbound and return journeys, from $76 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 - Tacoma Intl. Airport (SEA) to Boise Airport (BOI) cost?
Cheap round-trip flights from Seattle - Tacoma Intl. Airport (SEA) to Boise Airport (BOI) start from $116. 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 Alaska Airlines flight leaving SEA on July 25 2025 and touching down at BOI. The price was last updated on July 3 2025 and has not changed since.
What is the cheapest month to fly from SEA to BOI?
The cheapest flights from SEA to BOI 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 Seattle - Tacoma Intl. Airport (SEA) to Boise Airport (BOI)?
If you're departing from Seattle - Tacoma Intl. Airport (SEA), you can hop on a direct flight to Boise Airport (BOI) with Alaska Airlines.
What is the cheapest airline that flies from SEA to BOI?
Currently, the cheapest airline operating one-way flights from SEA to BOI is Alaska Airlines. You can book a seat on this route from $79. This fare is based on the lowest price found on Expedia departing within the next three months. The flight takes off from SEA on September 20 2025. Prices were last updated on July 3 2025 and have not changed since.
How many flights per day from Seattle - Tacoma Intl. Airport (SEA) to Boise Airport (BOI)?
With an average of 14 nonstop flights that operate from Seattle - Tacoma Intl. Airport (SEA) to Boise Airport (BOI) every day, you'll be jetting off in no time.
What are the most popular departure times for flights from Seattle - Tacoma Intl. Airport (SEA) to Boise Airport (BOI)?
Flights between SEA and BOI are busiest at 9 PM. If you're after a quieter experience and possibly cheaper tickets, choose a time outside the usual busy windows.
What day of the week has the most flights from SEA to BOI?
Travel on a Friday if you're searching for the biggest selection of flights from Seattle - Tacoma Intl. Airport (SEA) to Boise Airport (BOI).
What is the earliest flight from Seattle - Tacoma Intl. Airport (SEA) to Boise Airport (BOI)?
Seattle - Tacoma Intl. Airport (SEA)'s first flight to Boise Airport (BOI) is at approximately 7:20AM UTC-8. With a travel time of 1h 34m, you'll touch down at around 9:54AM UTC-7.
How long does it take to fly from Seattle - Tacoma Intl. Airport (SEA) to Boise Airport (BOI)?
It takes about 1 hour and 25 minutes to cover the 400 mi from SEA to BOI.
What airline has the least delays from SEA to BOI?
Consider booking with Aeromexico if you'd like to go straight from Seattle - Tacoma Intl. Airport (SEA) to Boise Airport (BOI) without any delays. This carrier has the best track record for punctuality, with an on-time performance of 98%. Want real-time updates? You can check your flight status using the Expedia App.
What is the best time to fly from Seattle - Tacoma Intl. Airport (SEA) to Boise Airport (BOI)?
To touch down at Boise Airport (BOI) without delays, select a flight that leaves from Seattle - Tacoma Intl. Airport (SEA) before 3 PM. The chance of cancellations is 22% higher, on average, for departures after this hour.**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 Boise from Seattle - Tacoma Intl. Airport (SEA)?
If you've booked a direct flight from Seattle - Tacoma Intl. Airport (SEA) to Boise, Boise Airport (BOI) is the only airport you can touch down at.
Is it cheaper to buy a plane ticket from Seattle - Tacoma Intl. Airport (SEA) to Boise Airport (BOI) last-minute?
Waiting until just before your departure to book your flight from SEA to BOI often results in higher prices. Although you may find some last-minute deals, they aren't always guaranteed. Keep your travel plans flexible for the best chance of scoring a bargain.
Is it cheaper to book a SEA to BOI flight and hotel package?
Compared with arranging hotels and flights separately, booking a SEA to BOI flight and hotel package with Expedia could result in significant savings. What's more, having everything in one easy place will take the hassle out of planning your trip. Just pick your flights and select from our wide range of stays, then personalize your trip with extras like tours and car rentals.
Can I cancel or change the date of my flight from Seattle - Tacoma Intl. Airport (SEA) to Boise Airport (BOI)?
In most cases, you can reschedule or cancel your SEA to BOI flight. However, there may be additional charges, especially if you booked over 24 hours ago. Check your itinerary for the airline's rules and fees on flight changes, or if you need further information, head to our Customer Service portal.

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*Available to One Key members.