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

View $68 flight on Wed, Oct 29, 2025Opens in a new window

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

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

Nonstop
Carry-on included
Lower price than typical

Cheap Flights from Boise to Seattle (BOI-SEA)

Prices were available within the past 7 days and start at $68 for one-way flights and $99 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Alaska Airlines
Sat, Nov 8 - Mon, Nov 10
BOI
Boise
SEA
Seattle
$99 Roundtrip, just found
$99
Roundtrip
just found
Select Alaska Airlines flight, departing Sat, Nov 8 from Boise to Seattle, returning Mon, Nov 10, priced at $99 just found
Delta
Fri, Jan 23 - Mon, Jan 26
BOI
Boise
SEA
Seattle
$99 Roundtrip, just found
$99
Roundtrip
just found
Select Delta flight, departing Fri, Jan 23 from Boise to Seattle, returning Mon, Jan 26, priced at $99 just found
Alaska Airlines
Wed, Oct 29 - Sun, Nov 2
BOI
Boise
SEA
Seattle
$108 Roundtrip, just found
$108
Roundtrip
just found
Select Alaska Airlines flight, departing Wed, Oct 29 from Boise to Seattle, returning Sun, Nov 2, priced at $108 just found
Alaska Airlines
Tue, Dec 23 - Wed, Dec 31
BOI
Boise
SEA
Seattle
$117 Roundtrip, found 3 hours ago
$117
Roundtrip
found 3 hours ago
Select Alaska Airlines flight, departing Tue, Dec 23 from Boise to Seattle, returning Wed, Dec 31, priced at $117 found 3 hours ago
Alaska Airlines
Sat, Nov 8 - Mon, Nov 10
BOI
Boise
SEA
Seattle
$118 Roundtrip, just found
$118
Roundtrip
just found
Select Alaska Airlines flight, departing Sat, Nov 8 from Boise to Seattle, returning Mon, Nov 10, priced at $118 just found
Alaska Airlines
Wed, Dec 24 - Fri, Dec 26
BOI
Boise
SEA
Seattle
$127 Roundtrip, just found
$127
Roundtrip
just found
Select Alaska Airlines flight, departing Wed, Dec 24 from Boise to Seattle, returning Fri, Dec 26, priced at $127 just found
Alaska Airlines
Tue, Nov 4 - Wed, Nov 5
BOI
Boise
SEA
Seattle
$136 Roundtrip, found 1 hour ago
$136
Roundtrip
found 1 hour ago
Select Alaska Airlines flight, departing Tue, Nov 4 from Boise to Seattle, returning Wed, Nov 5, priced at $136 found 1 hour ago
Southwest Airlines
Thu, Nov 6 - Wed, Nov 12
BOI
Boise
SEA
Seattle
$144 Roundtrip, just found
$144
Roundtrip
just found
Select Southwest Airlines flight, departing Thu, Nov 6 from Boise to Seattle, returning Wed, Nov 12, priced at $144 just found
Hawaiian Airlines
Tue, Mar 3 - Sat, Mar 7
BOI
Boise
SEA
Seattle
$167 Roundtrip, found 5 days ago
$167
Roundtrip
found 5 days ago
Select Hawaiian Airlines flight, departing Tue, Mar 3 from Boise to Seattle, returning Sat, Mar 7, priced at $167 found 5 days ago
United
Tue, Nov 4 - Wed, Nov 5
BOI
Boise
SEA
Seattle
$177 Roundtrip, found 1 hour ago
$177
Roundtrip
found 1 hour ago
Select United flight, departing Tue, Nov 4 from Boise to Seattle, returning Wed, Nov 5, priced at $177 found 1 hour ago

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

January is typically the cheapest month to fly

From $76 - $197 per traveler.

Frequently asked questions

How much does a flight from Boise Airport (BOI) to Seattle - Tacoma Intl. Airport (SEA) cost?
Get a cheap one-way flight from $68 or cheap return flight from $99 from Boise Airport (BOI) to Seattle - Tacoma Intl. Airport (SEA) 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 Boise Airport (BOI) to Seattle - Tacoma Intl. Airport (SEA)?
Flying in November is a good way to save, as it's the cheapest month for flights between BOI and SEA. You'll usually find the lowest fares during off-peak months.
Which airlines fly direct from Boise Airport (BOI) to Seattle - Tacoma Intl. Airport (SEA)?
You can fly nonstop from Boise Airport (BOI) to Seattle - Tacoma Intl. Airport (SEA) on an Alaska Airlines flight.
What is the cheapest airline that flies from Boise Airport (BOI) to Seattle - Tacoma Intl. Airport (SEA)?
The cheapest airline to offer flights between Boise Airport (BOI) and Seattle - Tacoma Intl. Airport (SEA) will change depending on your travel plans. Delta Air Lines and Alaska Airlines are just some of the choices offering reasonable prices. Use Expedia's search tool to compare airlines in one place and find the right BOI to SEA flight for your budget.
How many flights per day from Boise Airport (BOI) to Seattle - Tacoma Intl. Airport (SEA)?
With an average of 14 nonstop flights that operate from Boise Airport (BOI) to Seattle - Tacoma Intl. Airport (SEA) daily, you'll be soaring through the skies in no time.
What are the most popular departure times for flights from Boise Airport (BOI) to Seattle - Tacoma Intl. Airport (SEA)?
More passengers fly between BOI and SEA at 9 AM than at any other time of day. Looking for a quieter experience? Pick a flight outside the busiest times and there's a chance you'll save on your fare as well.
What day of the week has the most flights from BOI to SEA?
Travel on a Friday if you're searching for the largest selection of flights from Boise Airport (BOI) to Seattle - Tacoma Intl. Airport (SEA).
What is the earliest flight from Boise Airport (BOI) to Seattle - Tacoma Intl. Airport (SEA)?
The earliest flight departing from Boise Airport (BOI) is at around 5:45AM UTC-7. Catch this flight and you'll reach Seattle - Tacoma Intl. Airport (SEA) at approximately 6:38AM UTC-8. The total time in the air is 1h 53m.
How long does it take to fly from Boise Airport (BOI) to Seattle - Tacoma Intl. Airport (SEA)?
The average flight time from BOI to SEA is 1 hour and 46 minutes, covering a total distance of 400 mi.
What airline has the least delays from BOI to SEA?
With 100% of journeys typically landing on time, Air France has the best on-time performance for nonstop flights from Boise Airport (BOI) to Seattle - Tacoma Intl. Airport (SEA). To check your flight status and get notified about any changes, simply head to the Expedia App.
What is the best time to fly from Boise Airport (BOI) to Seattle - Tacoma Intl. Airport (SEA)?
Choose a flight from Boise Airport (BOI) to Seattle - Tacoma Intl. Airport (SEA) that takes off before 3 PM to reduce the risk of cancellations. Later departures have a 22% higher chance of being canceled, on average.**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 Seattle from Boise Airport (BOI)?
Seattle - Tacoma Intl. Airport (SEA) is the only airport in Seattle with direct flights from Boise Airport (BOI). Consider the options and discover cheap fares on Expedia.
Is it cheaper to buy a plane ticket from Boise Airport (BOI) to Seattle - Tacoma Intl. Airport (SEA) last-minute?
Booking your ticket from BOI to SEA just before your journey is generally more expensive. However, if there's some wiggle room with your departure dates and times, you could snag a cheap last-minute fare.
Is it cheaper to book a BOI to SEA flight and hotel package?
You can save money by booking a BOI to SEA flight and hotel package compared to booking separately. In fact, travelers could save hundreds of dollars by bundling with Expedia. And it's simple to manage everything in one convenient place. After choosing your preferred flights and accommodations, you can add extras like tours, car rentals and activities.
Can I cancel or change the date of my flight from Boise Airport (BOI) to Seattle - Tacoma Intl. Airport (SEA)?
In most instances, you can cancel or reschedule your BOI to SEA flight. However, additional charges may apply, especially if you booked over 24 hours ago. Check your itinerary for the airline's guidelines and fees on flight changes, or if you'd like further details, go to our Customer Service portal.

Travel information

Travel information

0
Origin airport
Boise
Destination airport
Seattle - Tacoma Intl.
Airlines serving
Alaska Airlines, American Airlines, Delta, Frontier Airlines, Southwest Airlines, United
Roundtrip price
$97
Distance
397 mi

Book with confidence

Book with confidence

Boise to Seattle Flights

The cheapest times to fly from Boise to Seattle

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

 

The best time to book a flight from Boise to Seattle

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

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 Boise to Seattle 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 Boise to Seattle 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 Boise to Seattle 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.

 

Boise to Seattle Flights

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*Available to One Key members.