BOI - SEA

$109 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 6/17. 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
$197
Typical prices: $290-$157
Delta
Tue 10/6Tue 10/13
BOI - SEA • Non-stop
Cheapest one-way
$109
Typical prices: $129-$213
United Airlines
Wed 6/17
BOI - SEA • 1 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 $197 (round-trip)
Best reviews • 7.9 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 40m
Direct flights
Direct flights
+1
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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 66% compared to booking last minute.
Insights
Insights
Insights
Insights
When to travel
Cheapest • 28% price drop
Most popular
Good to know
Good to know
+1
+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

Tue, Oct 6 - Tue, Oct 13
Delta Logo
8:40 am - 9:37 am
BOI
-
SEA
1h 57mnonstop
Delta Logo
9:30 am - 12:06 pm
SEA
-
BOI
1h 36mnonstop
$197Delta
Sat, Aug 22 - Mon, Aug 24
Delta Logo
6:49 am - 7:35 am
BOI
-
SEA
1h 46mnonstop
Delta Logo
2:45 pm - 5:19 pm
SEA
-
BOI
1h 34mnonstop
$207Delta
Fri, Aug 21 - Sun, Aug 23
Delta Logo
12:23 pm - 1:12 pm
BOI
-
SEA
1h 49mnonstop
Delta Logo
7:50 pm - 10:30 pm
SEA
-
BOI
1h 40mnonstop
$217Delta
Tue, Jul 28 - Tue, Aug 4
Southwest Logo
7:55 pm - 11:35 pm
BOI
-
SEA
4h 40m
1 stop
Southwest Logo
8:30 am - 7:45 pm
SEA
-
BOI
10h 15m
1 stop
$222Southwest
Wed, Aug 12 - Wed, Aug 12
Alaska Airlines Logo
6:23 am - 7:00 am
BOI
-
SEA
1h 37mnonstop
Alaska Airlines Logo
10:10 am - 3:35 pm
SEA
-
BOI
4h 25m
1 stop
$225Alaska Airlines
Tue, Aug 25 - Wed, Aug 26
Southwest Logo
2:20 pm - 9:15 pm
BOI
-
SEA
7h 55m
2 stops
Southwest Logo
11:40 am - 10:25 pm
SEA
-
BOI
9h 45m
2 stops
$227Southwest
Tue, Jul 28 - Tue, Aug 4
Southwest Logo
3:00 pm - 12:45 am
BOI
-
SEA
10h 45m
2 stops
Southwest Logo
8:30 am - 7:45 pm
SEA
-
BOI
10h 15m
1 stop
$228Southwest
Fri, Aug 21 - Tue, Aug 25
Southwest Logo
10:50 am - 9:50 pm
BOI
-
SEA
12h 00m
1 stop
Southwest Logo
5:55 am - 2:00 pm
SEA
-
BOI
7h 05m
1 stop
$232Southwest
Mon, Aug 31 - Tue, Sep 1
Alaska Airlines Logo
10:14 am - 9:08 am
BOI
-
SEA
23h 54m
1 stop
Alaska Airlines Logo
11:50 am - 2:22 pm
SEA
-
BOI
1h 32mnonstop
$237Alaska Airlines
Sun, Oct 25 - Mon, Oct 26
Alaska Airlines Logo
10:12 am - 9:48 am
BOI
-
SEA
24h 36m
1 stop
Alaska Airlines Logo
12:45 pm - 3:23 pm
SEA
-
BOI
1h 38mnonstop
$239Alaska 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.

How much is a round-trip flight from Boise to Seattle?

This analysis is based on the cheapest round-trip price found on KAYAK in the last 12 months by searching for a flight from Boise to Seattle departing in October.

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 Monday. 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 July, where the average cost of round-trip tickets is $287 and $227 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.

Yes, flying with a layover may cost you more time, but you can also save money on the route, with a 1 stop layover the cheapest option at $209 on average.

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 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$109
Best time to beat the crowds with an average 22% drop in price.
Most popular time to fly with an average 47% 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 $109 for a one-way ticket and $197 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?

    All the following airlines offer inflight Wi-Fi service on the Boise to Seattle flight route: Alaska Airlines, Delta, American Airlines, Hawaiian Airlines, Virgin Atlantic, and JetBlue.

  • 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 $210 and an overall rating of 7.9, 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 $201 or less one-way and $352 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.
7.9
Alaska AirlinesOverall score based on 12422 reviews
8.1Boarding
8.5Crew
7.0Entertainment
7.8Comfort
7.1Food
Airline reviews

90 minute delay boarding the plane, 45 minute delay on the terminal, 2 hours late arriving, currently waiting 45 minutes on the tarmac for a gate so we can BEGIN deboarding. Absolute mess. Definitely will be my last flight with Alaska.

4.0 OkayAnonymous, May 2026
JFK - SEA
Read more Alaska Airlines reviews

90 minute delay boarding the plane, 45 minute delay on the terminal, 2 hours late arriving, currently waiting 45 minutes on the tarmac for a gate so we can BEGIN deboarding. Absolute mess. Definitely will be my last flight with Alaska.

Extremely professional crew there are very friendly and first class. Everything worked well on the plane. Food was to be expected. Drinks were very good. Shout out to Charlie in first class who was an excellent flight attendant.

The plug in for my charger didn’t work and on my return flight back home the passenger in the window seat got up seven times

The boarding pass had no gate published and there are many fewer large boards with arrivals and departures I almost missed my flight trying to find the gate

Everyone was so kind, flight was wonderful, check in and baggage were easy. Thank you guys so much for a great trip

For such a long flight, Tampa to Seattle, was shocked to learn that no food was served. Also, there were no TV monitors to be able to watch a movie.

The staff at the check-in counter was responsive to the long queue and intervened to redirect the traffic: foreigners can't complete check-in without human agents; that is the real line which moves quickly enough. On-boarding and off-boarding were smooth and civilized. Overall the operations were efficient and the experience was pleasant.

Ok, but nothing special. Long flight with no blanket/pillow set.

Flight was delayed by 3 hrs. Forcing missed connection and overnight stay. Terrible.

Made our reservations 6 months ago. When we arrived at the airport we were informed they no longer have assigned seating. We were placed in the last row next to the restrooms. Our seats did not recline. I do not like the fact you are assigning seats. I don’t feel it’s fair. People who make last minute reservations sit in the middle seats. It’s did Southwest now have assigned seating and you assign seats. Even Southwest was more fair than Alaska.

Weather caused a long delay, but the efficiency and updates from the pilot were helpful. We were able to make our connection fortunately.

Planes were clean, no water or snacks on either flight.

Free & relatively fast Wi-Fi. Would've liked a wider drink selection.

I continue to be satisfied with Delta’s excellent service out of LGA. The digit id works well and gets me through security in no time. Whenever possible, I choose Delta.

Was revoked with Jet Blue due to delay from Kenya Air

Enjoyed it very much. Especially liked the free WiFi that Delta offers.

Smooth flight. Left on time, and got in 15 minutes early. Onboard video was great

Much better than I expected. I had an economy ticket so I was really happy the flight was so comfy and the service so generous. Passengers were all polite too.

For some reason, TSA Atlanta didn’t have my bag on the flight on time and they don’t have to provide Delta a reason for that.

Flight was delayed, we could have been notified earlier and in a consistent manner. App was not refreshing for another passenger to get the latest flight status. We could have stayed and waited at the hotel instead of waiting at the airport had we known the flight was going to delayed for more than 5 hours. The toilet is too tight, and needs to be cleaned more frequently (every hour). The entertainment screen froze, the touch screen not responding to touch. We were upgraded to comfort, it is more comfortable than regular economy seats.

Flight delayed two hours , missed connection flight then connection cancelled- horrible experience with hotel

Omg the disaster at the security was on another level! “Go to this end, sorry closed now, go to that end”. Ridiculous! This took over an hour! As far as the airline was concerned although I booked nearly a year ago I couldn’t get my bag tag - stand in another 15 minute line or my seat on Hawaiian Airlines- 5 more minutes! Then my TSA status was denied. Like what the heck! Makes a person not want to travel with this amount of incompetence

The Honolulu Hub needs 2 to 3 times the amount of things to do as well as shuttles that transport to/from gates and terminals. Arriving from OCONUS locations; transferring to CONUS locations its a miserable experience. Fetching and re-checking bags, then returning to a gate across the airport take longer than any other large airport. If youre confused by what I mean, the process goes like this: Disembark plane Walk a mile to the main terminal Walk half a mile to baggage claim Wait 40 minutes for baggage Walk a mile to re-check-in baggage Wait 20 minutes for checking in those bags Fo back through the wrong TSA line because the signage is poor Almost miss the connecting flight because your gate is across the airport.

The checking was disaster, the crew wasn't behave well. It took us two hours to check in, after that thr line at the TSA was long, we barely make the flight. Bad airline

Fabulous if you have a portable wheelchair. They can store it in the galley and you can just walk out with it. Really nice and the flat seats are just incredible, very nice. iPads for movies, also pretty nice,

The crew were exceptionally nice and accommodating. My wife was tired after the flight from Haneda, Tokyo. They let her sleep and served her dinner later after she woke up, before we landed in PDX.

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.

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

Information on your arrival and departure airports