BOI - SEA

$61 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 2/12. 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
$118
Overall average: $196
Alaska Airlines
Sun 1/11Sat 1/17
BOI - SEA • Non-stop
Cheapest non-stop
$118
Typical prices: $174-$337
Alaska Airlines
Wed 12/17Wed 12/24
BOI - SEA • Non-stop
Our travelers' advice
AI-generated summary based on content written by travel experts
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
Video guide: How to find cheap flights to Seattle
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Top airlines
Alaska Airlines
Cheapest • from $118 (round-trip)
Alaska Airlines
Best reviews • 8.0 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
When to book
4 weeks
in advance
Our data shows that travelers who book at least 4 weeks in advance save around 66% compared to booking last minute.
Insights
Insights
Insights
Insights
When to travel
February
Cheapest • 9% price drop
December
Most popular
Good to know
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+1
+1
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+1
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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

Sun, Jan 11 - Sat, Jan 17
Alaska Airlines Logo
3:43 pm - 4:21 pmBOI-SEA
1h 38mnonstop
Alaska Airlines Logo
2:00 pm - 7:10 pmSEA-BOI
4h 10m1 stop
$118Alaska Airlines
Find Deal
Thu, Jan 22 - Sun, Jan 25
Alaska Airlines Logo
5:40 am - 8:14 amBOI-SEA
3h 34m1 stop
Alaska Airlines Logo
12:43 pm - 3:10 pmSEA-BOI
1h 27mnonstop
$127Alaska Airlines
Find Deal
Thu, Jan 15 - Sun, Jan 18
Alaska Airlines Logo
5:40 am - 10:18 amBOI-SEA
5h 38m1 stop
Alaska Airlines Logo
8:35 pm - 11:01 pmSEA-BOI
1h 26mnonstop
$128Alaska Airlines
Find Deal
Sun, Dec 14 - Sun, Dec 21
Delta Logo
9:00 am - 9:57 amBOI-SEA
1h 57mnonstop
Delta Logo
9:35 pm - 12:04 amSEA-BOI
1h 29mnonstop
$129Delta
Find Deal
Sat, Jan 17 - Wed, Jan 21
Alaska Airlines Logo
5:40 am - 10:18 amBOI-SEA
5h 38m1 stop
Alaska Airlines Logo
8:25 am - 12:54 pmSEA-BOI
3h 29m1 stop
$136Alaska Airlines
Find Deal
Sat, Dec 6 - Sun, Dec 14
Alaska Airlines Logo
7:25 am - 10:27 amBOI-SEA
4h 02m1 stop
Alaska Airlines Logo
8:00 am - 10:34 amSEA-BOI
1h 34mnonstop
$137Alaska Airlines
Find Deal
Tue, Jan 27 - Thu, Jan 29
Delta Logo
9:15 am - 10:14 amBOI-SEA
1h 59mnonstop
Delta Logo
7:30 pm - 9:58 pmSEA-BOI
1h 28mnonstop
$139Delta
Find Deal
Sun, Jan 11 - Sat, Jan 17
Alaska Airlines Logo
7:00 am - 10:28 amBOI-SEA
4h 28m1 stop
Alaska Airlines Logo
8:25 am - 12:54 pmSEA-BOI
3h 29m1 stop
$146Alaska Airlines
Find Deal
Thu, Jan 22 - Sun, Jan 25
Southwest Logo
11:20 am - 5:50 pmBOI-SEA
7h 30m1 stop
Southwest Logo
6:05 am - 1:15 pmSEA-BOI
6h 10m1 stop
$151Southwest
Find Deal
Wed, Dec 17 - Wed, Dec 24
Alaska Airlines Logo
7:25 am - 10:27 amBOI-SEA
4h 02m1 stop
Alaska Airlines Logo
9:15 pm - 11:37 pmSEA-BOI
1h 22mnonstop
$152Alaska Airlines
Find Deal
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.

Find cheap flights to Seattle
Find cheap flights to Seattle

Planning a trip from Boise to Seattle? KAYAK’s data-powered insights will help you find cheap flights. Learn the best time to fly, how early to book your ticket, and other tips to secure great prices.

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 February, where tickets cost $177 (return) on average. On the other hand, the most expensive months are November and December, where the average cost of round-trip tickets is $217 and $217 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 $147, 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 66% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 7 weeks before departure.

Expert advice

Expert advice for your flight from Boise to Seattle

 
Snippets provided in this section are AI-generated based on a summarization of KAYAK-commissioned articles. The articles are presented as-is, for general informational purposes only, and may not be up-to-date. The opinions contained in the articles are original to the author and reflect their authentic experience, which may vary significantly from the experience of others.
KAYAK teamed up with top travel experts to share the best tips for your journey.
Airlines
Alaska Airlines

Alaska Airlines offers a 20-minute baggage guarantee with compensation if delayed.


Alaska Airlines' Wine Flies Free program allows free wine check-in from select airports.

Delta

Delta offers free Wi-Fi for SkyMiles members on domestic flights.


Delta's Sky Priority offers faster check-in for premium cabin and elite status passengers.

Our travel experts
Harriet Baskas

Harriet Baskas

Expert on Alaska Airlines

Harriet Baskas

Harriet Baskas

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.

Read more
Stefanie Waldek

Stefanie Waldek

Expert on Delta

Stefanie Waldek

Stefanie Waldek

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.

Read more

Good to know

Low seasonOctober
Cheapest flight$61
Best time to beat the crowds with an average 10% drop in price.
Most popular time to fly with an average 11% 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 $61 for a one-way ticket and $118 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, Hawaiian Airlines, and American Airlines offer inflight Wi-Fi service on the Boise to Seattle flight route.

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

    The Embraer 175 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 $202 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 $127 or less one-way and $296 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 11309 reviews
7.1Food
8.5Crew
7.0Entertainment
8.1Boarding
7.8Comfort
Airline reviews

Flight from PSP delayed ~2hs and missed connection. Terrible service providing acommodations & food (no rides - just the hotel van every 30 min, which you have to call). 12 dollars in food for a 9 hour delay. 30+ minutes to get everything sorted out.

2.0 MediocreGaston, Nov 2025PSP - SEA
Read more Alaska Airlines reviews

Flight from PSP delayed ~2hs and missed connection. Terrible service providing acommodations & food (no rides - just the hotel van every 30 min, which you have to call). 12 dollars in food for a 9 hour delay. 30+ minutes to get everything sorted out.

Confusing now Hawaiian and Alaskan have merged, hard to check in - they need to uncomplicated things.

The crew in first class did an amazing job keeping me comfortable, well fed and with plenty to drink. They work hard and deserve to be recognized

I would have liked if the flight existed. To be fair the federal government canceled it. But, since it WAS canceled, I would have liked it if Alaska Airlines had moved a finger to assist me rather then abandoning me with my luggage, unable to check it, for 14 hours in Portland. So federal regulations forbid them from storing my bag? Then at least help me find storage or SOMETHING.

Hate this airline. Uncomfortable seats, no screens, no good food.

Have mounted entertainment for long flights instead of making customers use their own equipment

I wish my checked suitcase could have been checked since I arrived an hour before take off .

The staff was so kind and friendly! Boarding was efficient and communication was timely. I would seek out flying with Alaska Airlines in the future.

The cabin crew on this team was particularly kind and excellent.

Check in went pretty well and you didn't lose my bag. After I got a drink from the drink cart they charged me for it, and at the crazy overpriced airport rates. Never had that happen before, is that an american thing? what madness.

Service in business class was not impressive. I ordered coffee with dinner and then watched other people get 2 refills before I got my 1 cup of coffee, and only after I pressed the attendant button overhead. Furthermore, the seats in the forward cabin need maintenance on this 737-800: the upholstery is detaching from the seat frame, at least on the backs of seats 1C, 1D.

The ticket agents in West Palm Beach on Friday afternoon Nov. 7th were incredible in getting us on an earlier plane to Atlanta during the government shutdown. Had the taken our original flight we would have missed our connection. She did this on her own, We didn't even have to ask, and she did it all with a smile and showing genuine concern that we would be taken care of. We are very grateful and thankful. We fly often, and now we will be sure to fly Delta.

Flight delayed then cancelled. Misplaced luggage. Still do not have. Rented car 1100 mile drive. I had to buy some overnight Hotels clothes toiletries gas food at my expense. Still not home. Not sure where luggage is. Over 4 hours on hold to Felta

I truly love flying with Delta. They have always treated me with the upmost respect

Our flight attendant in FIRST CLASS was one of the worst I’ve ever had. She was not at all pleasant, nor particularly good at her service.

Everything went well and was good. Nothing exceptional, but no complaints either. Cheap seats are pretty comfortable.

DELTA does a terrific job making sure you are well taken care of during the flight, gives you assurance before the flight through numerous email notifications about your upcoming flight & lastly good follow up after the flight making sure your needs were mat. It has been, is & will continue to be my carrier of choice in all my future travels. Good Job DELTA

Staff were friendly and happy. Delta could make sure passengers that don't have the app know of changes. Without Kayak I would not have known about the change of gate or the delay. Kayak was faster to notify me.

They ended up paying for the bag twice, but the counter wouldn't take my baggage receipt. Left it to me to resolve. Not sure how to resolve the issue.

The customer service before board was very rude and when I expressed my concerns about making the connecting flight she laughed and told me I bought the wrong ticket. I explained once it showed the flight was delayed it no longer let me change seats or anything. I was trying to upgrade to make sure I would get to the next gate on time.

The crew was quite good, they came by often with drinks or to collect trash. But what wasn't nice was the flight was over weigh and several people had to be rebooked. I was questioned whether I should have a seat when I was getting to it. The in-flight entertainment kept buffering and interrupting. And the route took the airplane through high winds which caused us a longer flight

Wasn’t on the flight due to Alaska cancellation…also after all the rerouting, I was going to be on a later flight that left SFO at 7:47pm, which meant an almost 6 hour layover. That same Hawaiian flight was delayed for another 2hours.

I had to cancel the flight because with a 3 hour delay for 'unexpected maintenance' in getting to LAX, I couldn't connect to an overseas flight that I had booked on Scandinavian Air.

The flight was CANCELED!!! Can’t get much more “poor” than that. I had to switch to American Airlines, add another layover and got home in Honolulu 4 hours later than I was supposed to be home. One bright spot was Josh with Alaska Airlines at SFO. He got me on a United Flight that got me home a few hours before I would have. Without him I would have gotten home almost 7 hours after my originally scheduled flight.

Canceled my flight within 24 hours, causing me arriving home midnight. Will never book Hawaiian airlines anymore

I like Hawaiian, it was great that they had good internet connection across the Pacific Ocean, thanks to Star Link satellites. The seating was comfortable, ( I was in economy ). Maybe I missed it, but I only got offered a beverage once. It was a nonstop flight KOA to SMF. I would take it again next time I go that way.

I always love flying Hawaii and I have nothing to add

Previously flown Hawaiian Airlines on similar routes, I found Alaska Airlines to be noticeably more comfortable. The seats on Alaska Airlines provided better support and cushioning, which made a significant difference on the long flight to the islands. When you’re spending 5-6 hours in the air, seat comfort really matters, and Alaska Airlines delivered where it counts. After comparing both carriers, I’ve decided to book with Alaska Airlines for all my future Hawaii trips. The superior seat comfort alone makes it worth choosing Alaska over Hawaiian Airlines. If you’re planning a trip to Hawaii and prioritizing comfort, I’d recommend giving Alaska Airlines a try. You won’t be disappointed. Highly recommended for Hawaii travel!

I received several emails about my 3:10 flight. When I showed up to the airport at 12:30 to check my bags I was told the flight was actually at 1 pm. They grudgingly rebooked me for a flight at 5:22 to Vegas to get a connecting to LAX. I did find the gate for my original 3:10 flight but they were booked. I proceeded to receive status updates and gate change information for the 3:10 flight, even though I was apparently never supposed to be on that flight

My flight was delayed three hours and then cancelled. The gate agent proceeded to rebook me in a middle seat without telling me and I was placed between two large individuals who did not fit in their own seats and instead took up most of mine. It was an awful experience.

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

Information on your arrival and departure airports