BOI - SEA

$89 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 5/5. 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
$157
Typical prices: $277-$147
Alaska Airlines
Tue 5/5Tue 5/12
BOI - SEA • Non-stop
Cheapest one-way
$89
Typical prices: $98-$208
Southwest
Tue 5/5
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 $157 (round-trip)
Best reviews • 7.9 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
Nonstop flights
You can fly direct with Alaska Airlines and Delta. Average duration is 1h 43m
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 66% compared to booking last minute.
Insights
Insights
Insights
Insights
When to travel
Cheapest • 24% price drop
Most popular
Good to know
Good to know
+1
+1
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We hope you love your trip to Seattle!
Flight Deals
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Expert advice
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, May 5 - Tue, May 12
Alaska Airlines Logo
6:08 pm - 6:48 pm
BOI
-
SEA
1h 40mnonstop
Alaska Airlines Logo
12:55 pm - 3:33 pm
SEA
-
BOI
1h 38mnonstop
$157Alaska Airlines
Sat, May 2 - Sun, May 3
Alaska Airlines Logo
6:00 am - 6:40 am
BOI
-
SEA
1h 40mnonstop
Alaska Airlines Logo
9:24 pm - 11:59 pm
SEA
-
BOI
1h 35mnonstop
$163Alaska Airlines
Sat, May 2 - Sun, May 3
Alaska Airlines Logo
4:38 pm - 5:11 pm
BOI
-
SEA
1h 33mnonstop
Alaska Airlines Logo
8:24 pm - 11:02 pm
SEA
-
BOI
1h 38mnonstop
$167Alaska Airlines
Wed, May 20 - Thu, Jun 4
Alaska Airlines Logo
6:07 pm - 6:52 pm
BOI
-
SEA
1h 45mnonstop
Alaska Airlines Logo
8:26 am - 11:03 am
SEA
-
BOI
1h 37mnonstop
$172Alaska Airlines
Thu, Apr 30 - Sun, May 3
Alaska Airlines Logo
6:00 am - 6:40 am
BOI
-
SEA
1h 40mnonstop
Alaska Airlines Logo
8:24 pm - 11:02 pm
SEA
-
BOI
1h 38mnonstop
$174Alaska Airlines
Thu, May 7 - Mon, May 11
Delta Logo
6:00 pm - 6:42 pm
BOI
-
SEA
1h 42mnonstop
Delta Logo
7:15 am - 9:54 am
SEA
-
BOI
1h 39mnonstop
$177Delta
Tue, May 5 - Tue, May 12
Southwest Logo
5:00 pm - 10:55 pm
BOI
-
SEA
6h 55m
1 stop
Southwest Logo
11:40 am - 11:30 pm
SEA
-
BOI
10h 50m
2 stops
$182Southwest
Sat, May 2 - Mon, May 4
Southwest Logo
7:05 am - 12:05 pm
BOI
-
SEA
6h 00m
1 stop
Southwest Logo
9:40 am - 6:20 pm
SEA
-
BOI
7h 40m
1 stop
$187Southwest
Sat, May 2 - Sun, May 3
Southwest Logo
8:50 am - 5:55 pm
BOI
-
SEA
10h 05m
2 stops
Southwest Logo
4:45 pm - 11:40 pm
SEA
-
BOI
5h 55m
1 stop
$192Southwest
Fri, May 8 - Mon, May 11
Southwest Logo
6:55 pm - 10:30 pm
BOI
-
SEA
4h 35m
1 stop
Southwest Logo
5:35 pm - 12:45 am
SEA
-
BOI
6h 10m
1 stop
$197Southwest
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 May.

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 $242 and $202 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 $197, 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 10 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$89
Best time to beat the crowds with an average 18% drop in price.
Most popular time to fly with an average 7% 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

  • 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 $89 for a one-way ticket and $157 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 7.9, Alaska Airlines is the most popular choice. Delta is also a great choice for the route, with an average price of $195 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 $182 or less one-way and $302 or less round-trip.

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 12201 reviews
7.8Comfort
7.0Entertainment
8.1Boarding
7.0Food
8.5Crew
Airline reviews

This flight was all good. It was packed, but it took off on time and there were no problems. It would have been nice if they'd checked our bags for free, as they sometimes do.

8.0 ExcellentRichard, Apr 2026
EUG - SEA
Read more Alaska Airlines reviews

This flight was all good. It was packed, but it took off on time and there were no problems. It would have been nice if they'd checked our bags for free, as they sometimes do.

Exactly as anticipated. I've always preferred Alaska Airlines over all others.

Were on time, very efficient and pleasant. Families with children were treated well and boarded ahead which made it easier for the rest of the plane.

I truly can’t give a review regarding the food or entertainment it did not apply to my flight. But everything ran very smoothly.

Great. A to B no issues. Everyone did their jobs exceptionally. All great. God bless America.

The response was very helpful and quick. Overall, it was very professional.

No complimentary snacks or food. Had to buy drinks and food.

The last row was empty and I sat there for two minutes. I was treated like a criminal for doing so. My wife wanted to get past the cart in the aisle and she was treated like dirt by the same black attendent..

My suggestion is that they should provide USB-C charging ports for modern cell phones.

Overall, we had a very good experience with Alaska Airlines on our flight from Honolulu to Seattle. The First Class cabin was comfortable, boarding was smooth, and the crew was friendly and attentive. The meal service was solid and the overall flight felt well organized. One thing that stood out negatively was the drink service. I was in First Class and, while quietly watching movies and not causing any issues, I was cut off after four drinks. I understand safety policies, but the cutoff felt a bit premature given the context.

The crew bent over backwards to thank us for flying and make us comfortable. The food service was quick and efficient. The Captain communicated and said goodbye and thank you as we departed. They really stood out!

Okay considering we had weather delays which the Pilot notified us of immediately!

Generally on time departures and arrivals, clean planes, sky miles membership provides great benefits (complimentary upgrades, etc).

Flight from Fort Wayne to Atlanta was the smallest in terms of cabin space that I've ever seen. A carry on I've used for 20 years BARELY fit in overhead compartment. I'm 5'10" and felt very cramped. Not the best experience.

I am writing to express my dissatisfaction with the poor service and unprofessional staff we encountered when traveling with an infant. Our flight was delayed, and the gate staff failed to manage the boarding process appropriately. Due to incorrect, unavailable, or missing 'pink tag' stroller and car seat check-in procedures at the gate, we were forced to board last. Furthermore, the gate staff was rude and dismissive, causing significant distress to our infant. To make matters worse, one of our checked items—an infant sleeper/lounger—was returned to us broken. Given the unsafe handling of essential equipment and unprofessional treatment, I expect a prompt resolution regarding compensation for the damaged items.

We departed and landed early which was a nice surprise. The boarding process was slow.

N Everything was perfect from boarding to assistance to baggage in Tampa

Subpar. The seating on the plane is almost unbearable. We are literally touching and/or sitting on each other which is totally unacceptable and shameful. Pilots and crew was very accommodating and friendly.

It was fine. 55 minute flight. No snacks or beverage service offered. Boarding went smoothly and my walker was waiting for me on the jet way.

My flight was cencaled due with the bad weather on Sunday the crew was poorly mistaken my luggage supposed depart with my flight instead I didn’t have my luggage for almost 3 days the website is poorly respond to my complain until I have someone to do it my connection smooth their not even respon or email me even the have my luggage

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.

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.

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

Information on your arrival and departure airports