$68 Cheap Flights from Seattle (SEA) to Boise (BOI)

View $68 flight on Wed, Nov 19, 2025Opens in a new window

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

Today's featured flight deals from Seattle-Tacoma International Airport (SEA) to Boise Airport (BOI)

Nonstop
Carry-on included
Lower price than typical

Cheap Flights from Seattle to Boise (SEA-BOI)

Prices were available within the past 7 days and start at $68 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
Sat, Sep 27 - Tue, Sep 30
SEA
Seattle
BOI
Boise
$117 Roundtrip, just found
$117
Roundtrip
just found
Select Alaska Airlines flight, departing Sat, Sep 27 from Seattle to Boise, returning Tue, Sep 30, priced at $117 just found
Alaska Airlines
Sat, Sep 27 - Tue, Sep 30
SEA
Seattle
BOI
Boise
$136 Roundtrip, just found
$136
Roundtrip
just found
Select Alaska Airlines flight, departing Sat, Sep 27 from Seattle to Boise, returning Tue, Sep 30, priced at $136 just found
Alaska Airlines
Wed, Nov 19 - Tue, Nov 25
SEA
Seattle
BOI
Boise
$137 Roundtrip, just found
$137
Roundtrip
just found
Select Alaska Airlines flight, departing Wed, Nov 19 from Seattle to Boise, returning Tue, Nov 25, priced at $137 just found
Delta
Wed, Nov 19 - Tue, Nov 25
SEA
Seattle
BOI
Boise
$137 Roundtrip, just found
$137
Roundtrip
just found
Select Delta flight, departing Wed, Nov 19 from Seattle to Boise, returning Tue, Nov 25, priced at $137 just found
Alaska Airlines
Sat, Sep 27 - Tue, Sep 30
SEA
Seattle
BOI
Boise
$147 Roundtrip, just found
$147
Roundtrip
just found
Select Alaska Airlines flight, departing Sat, Sep 27 from Seattle to Boise, returning Tue, Sep 30, priced at $147 just found
Southwest Airlines
Tue, Sep 23 - Wed, Sep 24
SEA
Seattle
BOI
Boise
$154 Roundtrip, found 3 hours ago
$154
Roundtrip
found 3 hours ago
Select Southwest Airlines flight, departing Tue, Sep 23 from Seattle to Boise, returning Wed, Sep 24, priced at $154 found 3 hours ago
Alaska Airlines
Tue, Sep 23 - Wed, Sep 24
SEA
Seattle
BOI
Boise
$157 Roundtrip, found 3 hours ago
$157
Roundtrip
found 3 hours ago
Select Alaska Airlines flight, departing Tue, Sep 23 from Seattle to Boise, returning Wed, Sep 24, priced at $157 found 3 hours ago
Alaska Airlines
Wed, Nov 19 - Tue, Nov 25
SEA
Seattle
BOI
Boise
$158 Roundtrip, just found
$158
Roundtrip
just found
Select Alaska Airlines flight, departing Wed, Nov 19 from Seattle to Boise, returning Tue, Nov 25, priced at $158 just found
United
Mon, Nov 24 - Wed, Dec 3
SEA
Seattle
BOI
Boise
$168 Roundtrip, found 2 hours ago
$168
Roundtrip
found 2 hours ago
Select United flight, departing Mon, Nov 24 from Seattle to Boise, returning Wed, Dec 3, priced at $168 found 2 hours ago
American Airlines
Tue, Oct 7 - Thu, Oct 9
SEA
Seattle
BOI
Boise
$404 Roundtrip, just found
$404
Roundtrip
just found
Select American Airlines flight, departing Tue, Oct 7 from Seattle to Boise, returning Thu, Oct 9, priced at $404 just found

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, Southwest Airlines, United
Roundtrip price
$117
Distance
397 mi
Average flight time
2 hours 29 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 $68 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?
Grab a cheap one-way flight from $68 or cheap return flight from $117 from Seattle - Tacoma Intl. Airport (SEA) to Boise Airport (BOI) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to see our cheapest flight offers on this route.
What is the cheapest month to fly from Seattle - Tacoma Intl. Airport (SEA) to Boise Airport (BOI)?
The cheapest month to fly from SEA to BOI is September, when there's less demand. Off-peak season is typically when better flight deals are available between these airports.
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 Seattle - Tacoma Intl. Airport (SEA) to Boise Airport (BOI)?
The cheapest airline to offer flights between Seattle - Tacoma Intl. Airport (SEA) and Boise Airport (BOI) can change depending on when you want to travel. Delta Air Lines and Alaska Airlines are just some of the choices offering competitive fares. Use Expedia's search tool to compare airlines in one place and find the right SEA to BOI flight that fits your budget.
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.

Explore a world of travel with Expedia

*Available to One Key members.