BOI - SEA

$55 Find Cheap Flights from Boise to Seattle

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Boise to Seattle departing on 4/16. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

KAYAK searches hundreds of travel sites at once for deals on flights to Seattle

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Boise to Seattle, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Boise to Seattle, as well as popular online travel agencies
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Everything you should know

Cheapest round-trip
$99
Overall average: $157
Alaska Airlines
Mon 4/20Mon 4/27
BOI - SEA • Non-stop
Cheapest one-way
$55
Typical prices: $98-$233
Hawaiian Airlines
Thu 4/16
BOI - SEA • Non-stop
Advice from real travelers
AI-powered summary based on content written by travel experts. AI can make mistakes.
Alaska Airlines' Wine Flies Free program is a perk.
Delta provides free Wi-Fi for SkyMiles members.
Expert advice
Expert advice
Expert advice
Expert advice
Top airlines
Cheapest • from $99 (round-trip)
Best reviews • 8.0 score
Airline reviews
Airline reviews
+1
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Airline reviews
Airline reviews
+1
Nonstop flights
You can fly direct with Alaska Airlines and Delta. Average duration is 1h 41m
Direct flights
Direct flights
+1
+1
Direct flights
Direct flights
+1
Avoid delays
Most punctual • 93% on-time
Best time • Fewest delays
Insights
Insights
Insights
Insights
Top layover airports
Cheapest • Avg $146 (round-trip)
Shortest trip • 3h 23m (one-way)
Insights
Insights
Insights
Insights
When to book
in advance
Our data shows that travelers who book at least 4 weeks in advance save around 67% compared to booking last minute.
Insights
Insights
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Insights
When to travel
Cheapest • 23% price drop
Most popular
Good to know
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+1
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Flight Deals
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Flight Deals

Cheap Flights from Boise to Seattle (BOI-SEA)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Boise to Seattle that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Boise to Seattle

Mon, Apr 20 - Mon, Apr 27
Alaska Airlines Logo
2:22 pm - 3:00 pm
BOI
-
SEA
1h 38mnonstop
Alaska Airlines Logo
11:22 am - 1:52 pm
SEA
-
BOI
1h 30mnonstop
$99Alaska Airlines
Fri, Apr 3 - Sun, Apr 5
Delta Logo
10:35 am - 11:20 am
BOI
-
SEA
1h 45mnonstop
Delta Logo
7:15 am - 9:55 am
SEA
-
BOI
1h 40mnonstop
$108Delta
Thu, Apr 2 - Thu, Apr 9
Delta Logo
5:52 am - 6:40 am
BOI
-
SEA
1h 48mnonstop
Delta Logo
9:21 pm - 11:46 pm
SEA
-
BOI
1h 25mnonstop
$117Delta
Sat, Apr 11 - Sat, Apr 18
Alaska Airlines Logo
8:20 am - 9:04 am
BOI
-
SEA
1h 44mnonstop
Alaska Airlines Logo
9:53 am - 12:22 pm
SEA
-
BOI
1h 29mnonstop
$118Alaska Airlines
Sun, Apr 12 - Tue, Apr 14
Delta Logo
5:52 am - 6:40 am
BOI
-
SEA
1h 48mnonstop
Delta Logo
9:40 pm - 12:17 am
SEA
-
BOI
1h 37mnonstop
$119Delta
Tue, Apr 14 - Sat, Apr 18
Alaska Airlines Logo
2:22 pm - 3:00 pm
BOI
-
SEA
1h 38mnonstop
Alaska Airlines Logo
9:53 am - 12:22 pm
SEA
-
BOI
1h 29mnonstop
$128Alaska Airlines
Fri, Apr 24 - Mon, Apr 27
Alaska Airlines Logo
7:20 pm - 7:53 pm
BOI
-
SEA
1h 33mnonstop
Alaska Airlines Logo
7:10 am - 9:42 am
SEA
-
BOI
1h 32mnonstop
$137Alaska Airlines
Thu, Apr 9 - Sun, Apr 12
Delta Logo
9:00 am - 9:49 am
BOI
-
SEA
1h 49mnonstop
Delta Logo
7:15 am - 9:55 am
SEA
-
BOI
1h 40mnonstop
$138Delta
Mon, May 4 - Thu, May 7
Alaska Airlines Logo
7:20 pm - 7:53 pm
BOI
-
SEA
1h 33mnonstop
Alaska Airlines Logo
9:24 pm - 11:59 pm
SEA
-
BOI
1h 35mnonstop
$139Alaska Airlines
Thu, May 7 - Mon, May 11
Alaska Airlines Logo
5:50 am - 2:55 pm
BOI
-
SEA
10h 05m
1 stop
Alaska Airlines Logo
8:24 pm - 11:02 pm
SEA
-
BOI
1h 38mnonstop
$142Alaska Airlines
Booking Insights

KAYAK's insights & trends for Boise to Seattle flights

Get data-powered insights and trends into flights from Boise to Seattle to help you find the cheapest flights, the best time to fly and much more.

What’s the cheapest day of the week to fly from Boise to Seattle?

The average price of all round-trip flights from Boise to Seattle clicked on KAYAK for each day over the last 12 months.

Your flight ticket price will generally be cheaper if you fly to Seattle on a Friday and more expensive on a Sunday. On your return trip to Boise, you should consider flying back on a Saturday, and avoid Sundays for better deals.

What is the cheapest month to fly from Boise to Seattle?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Boise to Seattle, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from Boise to Seattle is January, where tickets cost $139 (return) on average. On the other hand, the most expensive months are June and March, where the average cost of round-trip tickets is $222 and $207 respectively.

Can I save money by flying with a layover from Boise to Seattle?

The average round-trip price for all non-stop flights, flights with one layover, and flights with two layovers for the route found by users searching on KAYAK in the last 2 weeks.

No, with an average price for the route of $199, prices are generally cheapest when you fly direct.

How far in advance should I book a flight from Boise to Seattle?

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from Boise to Seattle, removes the top 0.1% to account for outliers, and then takes the average of all the values for each week.

To get a below average price on the flight from Boise to Seattle, you should book around 4 weeks before departure, which saves you about 67% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 6 weeks before departure.

Expert advice

Expert advice for your flight from Boise to Seattle

 
AI-powered summary based on content written by travel experts. AI can make mistakes.
KAYAK teamed up with top travel experts to share the best tips for your journey.
Our travel experts
Harriet Baskas

Harriet Baskas

Expert on Alaska Airlines

Harriet is an award-winning journalist who is happiest in an airport or an unusual museum. Her stories about airports, air travel, and the business of travel have appeared on NBC News, CNBC, USA TODAY, The Points Guy and other outlets. She is the creator of the StuckatTheAirport.com blog and the author of nine books. When not out on the road or exploring the latest airport amenities, she’s home in Seattle getting ready for the next adventure.

Stefanie Waldek

Stefanie Waldek

Expert on Delta

Stefanie Waldek is a freelance space, travel, and design writer based in Saratoga Springs, NY. Her words have appeared in Space.com, Travel + Leisure, Condé Nast Traveler, Architectural Digest, and House Beautiful, among other publications. An expert in aviation and expedition cruising, Stefanie is frequently up in the air or on the sea, likely en route to Antarctica or the Arctic.

Good to know

Low seasonFebruary
Cheapest flight$55
Best time to beat the crowds with an average 16% drop in price.
Most popular time to fly with an average 9% increase in price.
Flight from Boise to Seattle

When to book flights from Boise to Seattle

Are your dates flexible? Find out the best times to travel from Boise to Seattle based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from Boise to Seattle

  • Which accessible services are offered at Boise Airport?

    The airport has provided step-free access by providing elevators and ramps around the airport. TTY telephones and visual paging monitors are also available inside the terminal to cater to all passengers with special needs. Accessible parking and public transport are also provided at BOI 24h a day, and so are the accessible restrooms on each floor of Boise Airport.

  • What are the transport options from Seattle-Tacoma International Airport?

    The first option is the bus, which you can get at the street opposite the Sea-Tac Airport LINK Light Rail station and on the lower drive of the main terminal. These buses head downtown and to the surrounding areas. The second option is the LINK Light Rail system. You’ll get these trains from the airport’s parking garage, fourth floor. Trains run every 6-15min. Taxis are also available at the airport garage third floor, and so are shared shuttles offering door-to-door services. If you want to get your own wheels, head to the rental car center, just outside baggage claim.

  • What are the most sustainable airlines flying from Boise to Seattle?

    Several nonstop flights from Boise to Seattle are offered. If you wish to travel sustainably, fly with Alaska Airlines and Delta. On average, around 990 kg of carbon is emitted per passenger on flights from Boise to Seattle. These airlines emit 91% and 81% less carbon per passenger, making them a very sustainable option. Moreover, they both offer nonstop flights from BOI to SEA.

  • Which family services are offered at Seattle-Tacoma International Airport?

    The Mother’s Room is a quiet private place where nursing mothers can feed their babies privately. These rooms have rocking chairs and adjustable lighting, allowing mothers to lull their babies to sleep. Strollers and baby seats are also available for rent at SEA. Around baggage claim, you’ll find the rental station, Smarte Carte Storage. The airport has provided a kids’ play area with toys and climbing structures between Central Terminal and Gate A for the older kids.

  • What is the cheapest flight from Boise to Seattle?

    In the last 3 days, the lowest price for a flight from Boise to Seattle was $55 for a one-way ticket and $99 for a round-trip.

  • Do I need a passport to fly between Boise and Seattle?

    No

  • Which airports will I be using when flying from Boise to Seattle?

    When flying out of Boise you will be using Boise Air Term. Gowen Fld. You will be landing at Seattle, also known as Seattle/Tacoma Intl.

  • Which airlines offer Wi-Fi service onboard planes from Boise to Seattle?

    Alaska Airlines, Delta, American Airlines, and Hawaiian Airlines offer inflight Wi-Fi service on the Boise to Seattle flight route.

  • Which aircraft models fly most regularly from Boise to Seattle?

    The Boeing 737-800 Passenger/BBJ2 (winglets) is the aircraft model that flies most regularly on the Boise to Seattle flight route.

  • Which airline alliances offer flights from Boise to Seattle?

    SkyTeam, and oneworld are the airline alliances operating flights between Boise and Seattle, with SkyTeam being the most commonly used for this route.

  • On which days can I fly direct from Boise to Seattle?

    There are nonstop flights from Boise to Seattle on a daily basis.

  • Which is the best airline for flights from Boise to Seattle, Alaska Airlines or Delta?

    The two airlines most popular with KAYAK users for flights from Boise to Seattle are Alaska Airlines and Delta. With an average price for the route of $197 and an overall rating of 8.0, Alaska Airlines is the most popular choice. Delta is also a great choice for the route, with an average price of $197 and an overall rating of 7.9.

  • How does KAYAK find such low prices on flights from Boise to Seattle?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Boise to Seattle.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Boise to Seattle?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Seattle from Boise is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Boise to Seattle?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Seattle with an airline and back to Boise with another airline. Booking your flights between Boise and SEA can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Boise to Seattle?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Seattle from Boise up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

KAYAK’s top tips for finding a cheap flight from Boise to Seattle

  • Looking for a cheap flight? 25% of our users found flights on this route for $149 or less one-way and $303 or less round-trip.
  • Do you have some last-minute business that you need to handle before your flight to Seattle? Head to the business center at Boise Airport (BOI), on the second floor of the main terminal building. Fax and photocopying services and computers with internet access are available at the business center.
  • Pets are welcome at BOI. However, TSA requires all pets to remain within their crates while traveling through the airport. BOI has provided a pet relief area outside the west exit around baggage claim and an indoor relief area just after the security screening checkpoint.
  • You’re welcome to relax at the airline lounges at Seattle-Tacoma International Airport (SEA) after your flight. Alaska Airlines, Delta, and United Airlines have pay-at-the-door lounges, which you can access, and American Express card members can access the Centurion Lounge.
  • If you have some time to pass at SEA, check out the art or catch a live music performance at the airport. The Art Walk at SEA showcases most of the airport’s breathtaking collection, including sculptures, glasswork, painting, photography, and more. There are also daily live music performances at SEA under the Experience the City of Music program.
  • Shop all the essentials at SEA duty-free before leaving the airport. You’ll find two duty-free locations at SEA in the Central Terminal. These are the Gate A and Gate S locations, with the latter open 24/7.

Prefer to fly direct from Boise to Seattle?

 
Direct data is based off flight results for the next 60 days. Find direct flights from all airlines flying direct from Boise Air Term. Gowen Fld to Seattle/Tacoma Intl.
Find which airlines fly direct from Boise Air Term. Gowen Fld Airport to Seattle/Tacoma Intl Airport, which days they fly and book direct flights.

Direct departures

Boise Air Term. Gowen Fld to Seattle/Tacoma Intl

Monday

Alaska Airlines,Delta

Alaska Airlines,Delta

Tuesday

Alaska Airlines,Delta

Alaska Airlines,Delta

Wednesday

Alaska Airlines,Delta

Alaska Airlines,Delta

Thursday

Alaska Airlines,Delta

Alaska Airlines,Delta

Friday

Alaska Airlines,Delta

Alaska Airlines,Delta

Saturday

Alaska Airlines,Delta

Alaska Airlines,Delta

Sunday

Alaska Airlines,Delta

Alaska Airlines,Delta

See more direct flights

Direct returns

Seattle/Tacoma Intl to Boise Air Term. Gowen Fld

Monday

Alaska Airlines,Delta

Alaska Airlines,Delta

Tuesday

Alaska Airlines,Delta

Alaska Airlines,Delta

Wednesday

Alaska Airlines,Delta

Alaska Airlines,Delta

Thursday

Alaska Airlines,Delta

Alaska Airlines,Delta

Friday

Alaska Airlines,Delta

Alaska Airlines,Delta

Saturday

Alaska Airlines,Delta

Alaska Airlines,Delta

Sunday

Alaska Airlines,Delta

Alaska Airlines,Delta

See more direct flights

Reviews of the top 3 airlines serving from Boise to Seattle

 
See real verified KAYAK customer reviews for airlines flying from Boise to Seattle. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Boise to Seattle? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
8.0
Alaska AirlinesOverall score based on 12014 reviews
7.8Comfort
8.5Crew
7.0Entertainment
7.1Food
8.1Boarding
Airline reviews

The WiFi worked for entertainment but a nearly 4 hour flight should have personal tvs

10.0 ExcellentTyler, Mar 2026
DTW - SEA
Read more Alaska Airlines reviews

The WiFi worked for entertainment but a nearly 4 hour flight should have personal tvs

Generally very good. Waiting (due to de-icing and traffic) in plane to take off was a put-off. But it's not the airline's fault. I find Airbus more comfortable than Boeing.

Lot's of good food and free entanglement made the trip pleasurable and fun.

The food was terrible, worse that what you get with UA, an already one of the lowest standards to beat. How cheap one could be, providing that kind of junk food in first class. Unbelievable! The seats were not very comfortable either. And there were no screens either, not that I cared much but for you to know.

Easy check-in. Good customer service. Had to check carry-on due to lack of overhead space. Wish the airplane was configured with more overhead area so this doesn't usually happen.

Great flights, little turbulence, pilots kept stewardesses seated & safe, all staff friendly & professional

There is no entertainment on the plane. The snack is minimal. The crew was nice and professional.

Smooth flight, on time despite Captain’s forecast of troublesome weather conditions.

The aircraft was extremely warm the entire flight. After we landed we were stuck on the plane for another 45 minutes without a gate to deboard from. The smell of exhaust from the engines in the cabin along with the heat inside the cabin made the flight uncomfortable.

in-flight wifi was not working well. also the cabin temperature was a bit hot.

Love delta smaller commuter plane so no entertainment and paid wifi on MKE-LGA leg was extremely unreliable and slow

Stop changing gates. Stop cancelling flights Stop moving my seat.

Extremely disappointed with Delta. They canceled flight last minute and then I rebooked the other flights and with which were delayed as well

Could not get my connecting flight boarding pass until four hrs before departure! Ver annoying especially since the staff could not explain why!

The flight was flying with 30% capacity. The flight my seat from preferred seating to back of the seat. Even though i can understand that this was to balance the flight weight. The flight attendance decided to do the serving near my seat and in the middle , their noices woke me up from sleep , when i realized that the service has ended and when they were going back asked for a coffee, for which they answered they have completed teh service in my location. That really upset me as they woke me up and also rejected the coffee i asked. I ended up landing with a headache, thanks to the crew that screwed up my travel

Delayed. Hot. Passenger next to me was so large I couldn’t move.

Same experience as the flight from Norfolk to Atlanta where people are boarded in zones that don't make sense. People behind you on the plane will get on before you and they take the luggage space on your row.

The boarding process doesn't make sense since some people that will sit behind your rows are boarded before you and then they take up the luggage space above your head. I then have to wait for people to get off the plane before I can go back to get my luggage.

Good flight. Connector flight was delayed so made a short turnaround in Atlanta which was stressful. Otherwise, great crew, Staff in ATL was very informative about the delay and ensured people their connections were fine. Notified the ones that were not. Great communication.

Everything was good except wifi and a leaking drink chiller. The floor was all wet and my bag was soaked. Did not notice until debarking. Have not heard back from Delta. Even though this was leg one of an international flight in first class, they denied access to their Sky Club - very disappointing!

No charging outlets worked. Other than collecting trash attendants didn’t come around. No one could hear flight attendants announcements during the flight. Seat pads were horrible. Sitting on a board for 5 hours. What happened to Hawaiian airlines comfort, hospitality, and extras? Our pilots did an excellent job trying to minimize turbulence and incredible job in landing in windy conditions.

I like that if they asked you to checked in a bag at the gate they give you priority to board

Horrible food and crew. Crew were laughing and talking loud while people were trying to sleep

Yall need to integrate your system with Alaska more efficiently. They booted me off the first flight because of a discrepancy on your end.

The crew at Hawaiian Airlines was fantastic. Kind and hard working. The pilots were great with giving us all the updates to make sure we were informed.

Very good. Nice plane and we sat in economy plus - bigger seats, more room. They served a meal and snacks, and the meal was an apple stuffed pancake that was very good! The snack for us was a hummus sandwich - also very good. The flight attendants were helpful and nice. They have plenty of movies and shows to watch. My only negative -- they changed our flights around and did not adjust the layovers, so we ended up with a very long and unnecessary layover in Honolulu.

I liked the Starlink WiFi but didn't like how they said they were the only airline to offer a free meal and it turns out to be just a standalone sandwich and then charge for snacks to go with it. Rather have the free snacks like Southwest, but have the option to purchase a decent meal for a 5+ hour flight.

Flight scheduled to take off at 5.55pm but it did not take off until 7pm due to some food delivery delay.

Unfortunately, I was put into the middle seat in the first row of premium seating. Sounds nice right? No! that is the worst seat in the plane. I wish I was in economy rather than be in that seat! There is no seat back pocket, no tray table, no charger. Nothing! so unless you're row mates are willing to let you share their basic amenities any flyer should have, you are stuck. It was the worst experience ever! And the flight attendant forgot to take my drink order. I felt like the forgotten flyer.

Delayed and cancelled flights were hard and very stressful, both ways!

Everything you need to know for your flight from Boise to Seattle

Information on your arrival and departure airports