$105 Find Cheap Flights from Seattle to Idaho

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Seattle to Idaho departing on 9/8. 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 Idaho

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Seattle to Idaho, 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 Seattle to Idaho, as well as popular online travel agencies
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Flight Deals

Cheap Flights from Seattle to Idaho

Cheapest round-trip prices found by our users on KAYAK in the last 72 hours
Boise
Boisenonstop$197
Idaho Falls
Idaho Fallsnonstop$277
Hailey
Haileynonstop$237
Lewiston
Lewistonnonstop$249
Twin Falls
Twin Falls1 stop$261
Pocatello
Pocatello1 stop$427
Spokane
Spokanenonstop$217
Boise
Boisenonstop$197
Idaho Falls
Idaho Fallsnonstop$277
Hailey
Haileynonstop$237
Lewiston
Lewistonnonstop$249
Twin Falls
Twin Falls1 stop$261
Pocatello
Pocatello1 stop$427
Spokane
Spokanenonstop$217

Book Cheap Seattle to Idaho Plane Tickets

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Seattle to Idaho 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 Seattle to Idaho

Sat, Sep 12 - Wed, Sep 16
Alaska Airlines Logo
3:41 pm - 6:07 pm
SEA
-
BOI
1h 26mnonstop
Alaska Airlines Logo
4:20 pm - 4:56 pm
BOI
-
SEA
1h 36mnonstop
$197Alaska Airlines
Sat, Sep 26 - Thu, Oct 1
Alaska Airlines Logo
5:54 pm - 8:24 pm
SEA
-
BOI
1h 30mnonstop
Alaska Airlines Logo
8:03 am - 8:42 am
BOI
-
SEA
1h 39mnonstop
$207Alaska Airlines
Wed, Aug 26 - Tue, Sep 1
Southwest Logo
1:45 pm - 11:20 pm
SEA
-
BOI
8h 35m
1 stop
Southwest Logo
12:35 pm - 6:10 pm
BOI
-
SEA
6h 35m
1 stop
$210Southwest
Wed, Aug 26 - Tue, Sep 1
Southwest Logo
9:25 am - 4:10 pm
SEA
-
BOI
5h 45m
1 stop
Southwest Logo
2:20 pm - 9:15 pm
BOI
-
SEA
7h 55m
2 stops
$216Southwest
Sat, Aug 22 - Sun, Aug 23
Delta Logo
1:57 pm - 3:19 pm
SEA
-
GEG
1h 22mnonstop
Delta Logo
1:00 pm - 2:27 pm
GEG
-
SEA
1h 27mnonstop
$227Delta
Sat, Aug 29 - Mon, Aug 31
United Airlines Logo
9:00 am - 3:31 pm
SEA
-
BOI
5h 31m
1 stop
United Airlines Logo
7:05 pm - 11:26 pm
BOI
-
SEA
5h 21m
1 stop
$227United Airlines
Wed, Sep 9 - Tue, Sep 15
Frontier Logo
7:00 am - 12:04 pm
SEA
-
BOI
28h 04m
1 stop
Frontier Logo
12:59 pm - 12:27 am
BOI
-
SEA
12h 28m
1 stop
$228Frontier
Mon, Sep 14 - Tue, Sep 22
Frontier Logo
7:41 pm - 12:04 pm
SEA
-
BOI
15h 23m
1 stop
Frontier Logo
12:59 pm - 12:27 am
BOI
-
SEA
12h 28m
1 stop
$229Frontier
Thu, Aug 27 - Sun, Aug 30
Delta Logo
10:45 am - 12:08 pm
SEA
-
GEG
1h 23mnonstop
Delta Logo
7:05 am - 8:29 am
GEG
-
SEA
1h 24mnonstop
$237Delta
Tue, Sep 15 - Thu, Sep 17
United Airlines Logo
8:40 am - 5:49 pm
SEA
-
JAC
8h 09m
1 stop
United Airlines Logo
4:25 pm - 11:04 pm
JAC
-
SEA
7h 39m
1 stop
$311United Airlines
Booking Insights

KAYAK's insights & trends for Seattle to Idaho flights

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

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

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

What is the cheapest Seattle to Idaho flight route?

Data is based on round-trip flight searches on KAYAK over the past month.

The cheapest ticket to Idaho from Seattle found in the last 5 days was to Boise, at $177 round-trip. The most popular route is from Seattle (SEA) to Boise (BOI), and the cheapest round-trip airline ticket found on this route in the last 5 days was $177.

What is the cheapest time of day to fly to Idaho?

The average price for all round-trip flights from Seattle to Idaho depending on the time of departure, clicked by users on KAYAK in the last 2 weeks.

The cheapest time of day to fly to Idaho is generally in the afternoon, when round-trip flights cost $215 on average. Morning departures are around 9% cheaper than evening flights, on average. The most expensive time of day to fly to Idaho is generally in the evening, which is peak travel time and where the average cost of a ticket is $249.

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

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 $370, prices are generally cheapest when you fly direct.

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

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Seattle to Idaho, 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 Seattle to Idaho is October, when tickets cost $59 (return) on average. On the other hand, the most expensive months are July and June, when the average cost of round-trip tickets is $167 and $137 respectively.

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

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

If your flying dates are flexible, you should consider flying to Idaho on a Saturday, as we generally find the cheapest rates on that day for this route. On the other hand, Sunday is the most expensive day to fly from Seattle to Idaho. For your return ticket, we recommend flying on a Friday and avoiding Sundays for the best deals.

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

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from Seattle to Idaho, 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 Seattle to Idaho, you should book around 4 weeks before departure, which saves you about 60% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 8 weeks before departure.

Good to know

Low seasonJanuary
Cheapest flight$105
Best time to beat the crowds with an average 27% drop in price.
Most popular time to fly and prices are also 7% lower on average.
Flight from Seattle to Boise

FAQs - booking Idaho flights

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

    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 Seattle to Idaho.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight from Seattle to Idaho 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 Seattle to Idaho?

    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 from Seattle to Idaho with an airline and back with another airline.

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

    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 from Seattle to Idaho up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top 3 airlines serving from Seattle to Idaho

 
See real verified KAYAK customer reviews for airlines flying from Seattle to Idaho. 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 Seattle to Idaho? 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 12509 reviews
8.5Crew
7.0Food
8.1Boarding
7.0Entertainment
7.8Comfort
Airline reviews

People were friendly. Flight was a little delayed. Maybe I missed the reason for it. Overall a nice experience.

8.0 ExcellentScott, Jun 2026
SEA - LAX
Read more Alaska Airlines reviews

People were friendly. Flight was a little delayed. Maybe I missed the reason for it. Overall a nice experience.

Crews were friendly enough. To help the airline I checked my carry on baggage. Typical "gonna be a full flight we need 19 carry on bags to be checked to help out". So I helped out only to have to wait 30+ mins for my luggage and risked not getting to my car rental on time. The return flight was delayed. Kept hearing employees say something about "they didn't have any power" which is kind of concerning. The air flow and air conditioning was insufficient. It was warm and stuffy during the flight. Plus no free wi-fi......Booooooo!

Didn’t even get on, check my flight to Seattle for details. Do better Alaska.

A five hour nonstop flight traveling over a few time zones and over the dinner hour and you get a small bag of pretzels. And no screens to watch movies. I

The flight kept getting delayed due to a maintenance issue. That happens, but there is no excuse for changing the gate FIVE TIMES, including one time nearly all the way across SeaTac. After we were delayed for 3+ hours, they did send us (via email) a $12 meal voucher...except you can't find a $12 meal anywhere in that airport, unless you consider a bag of M&M's and a bottle of water a meal. The plane had one problem after another but finally took off 4.5 hours late. This caused us to miss our hotel shuttle at ORD (they didn't run past midnight and it was 3 am) so we had to wait 25 minutes and pay for an Uber. I did get a $50 flight voucher from Alaska...big deal. Barely covers my Uber ride that I shouldn't have needed.

I upgraded to a better seat and it was much more comfortable. Nobody serves food anymore and actually on a 2+ hr flight not necessary. I didn’t even get water.

Check in & bag drop was straightforward. Alaskair changed the gate approx 40 min before departure, and I only became aware due to Google wallet update to my boarding pass. Had to move from gate N1 to C9 which required use of the Train, luckily I had time available.

Super impressed by staff courtesy, and assistance, Flight was one of the best I've had despite turbulence... Will definitely be flying Alaskan air as my preferred choice

My boarding passes were pulled from my Apple wallet and my 3 family members who were all sitting together in the same row all got put middle seats and were one of the last to board and barely were able to get our bags in the luggage bins.

Was disappointed not to have known Alaska Air offers no music, no flight aware, no films.

I have Precheck. Flew HPN to DEN and return this past weekend. Delta didn't attach my Precheck number to this trip. So it was waiting in general line especially in Denver. Unavailable.

Original flight was delayed, then cancelled and the gate staff did not expedite rebooking. Also, no instructions were given that a ticket number was needed before being called to facilitate rebooking. This could have been much more organized.

Be on time? When not on time a circling for over an hour offer more than 1 bag of chips to the passengers? It was a 7 hour flight by the time we got done.

Five hour delays every hour, I wish it were all at once

Flight delayed four separate times. I’m now one hour hours late to landing.

worst flight ever from Delta, it got delayed and kept on delaying..

Should never have had to go to Detroit from Orlando back to Tennessee!

Got rerouted from a straight flight from Orlando to Atlanta to Knoxville to a flight from Orlando to Detroit to Knoxville! Seriously!! Flight delay out of Detroit! Long day for what should have been a pretty easy travel day!

Two delays on two separate planes with parts they could not easily find and replace.

Checkin was good, fllight ws good. Onlly complaint is lack of foot on 6 hour flight from Seattle to Boston. Snacks were flimsy - chips and cookies. could have offered something more substantial for such a long flight. I know you can buy food in airport but for the price you pay for a ticket, they should step up for the passengers.

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.

There was no wifi available at any price -- the plane did not have wifi equipment. Movie choices were blah - hits from the past; nothing recent. The food was blah airplane food. They should have had Mai Tai drinks available as per the Hawaiian Airlines magazine, but they had none onboard.

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

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

Information on your arrival and departure airports