$62 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 10/8. 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

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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Cheap Flights from Seattle to Idaho

Cheapest round-trip prices found by our users on KAYAK in the last 72 hours
Boise
Boisenonstop$137
Idaho Falls
Idaho Fallsnonstop$181
Hailey
Haileynonstop$277
Lewiston
Lewistonnonstop$289
Twin Falls
Twin Falls1 stop$356
Pocatello
Pocatello1 stop$377
Spokane
Spokanenonstop$157
Boise
Boisenonstop$137
Idaho Falls
Idaho Fallsnonstop$181
Hailey
Haileynonstop$277
Lewiston
Lewistonnonstop$289
Twin Falls
Twin Falls1 stop$356
Pocatello
Pocatello1 stop$377
Spokane
Spokanenonstop$157

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, Oct 18 - Sat, Oct 25
Alaska Airlines Logo
12:00 pm - 2:36 pmSEA-BOI
1h 36mnonstop
Alaska Airlines Logo
6:30 am - 7:13 amBOI-SEA
1h 43mnonstop
$137Alaska Airlines
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Tue, Oct 14 - Wed, Oct 15
Southwest Logo
1:20 pm - 11:05 pmSEA-BOI
8h 45m1 stop
Southwest Logo
5:30 pm - 10:45 pmBOI-SEA
6h 15m1 stop
$142Southwest
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Wed, Oct 15 - Wed, Oct 22
Multiple Airlines Logo
12:00 pm - 2:36 pmSEA-BOI
1h 36mnonstop
Multiple Airlines Logo
1:50 pm - 7:10 pmBOI-SEA
6h 20m1 stop
$148Multiple Airlines
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Fri, Oct 24 - Sun, Oct 26
Delta Logo
9:35 pm - 12:08 amSEA-BOI
1h 33mnonstop
Delta Logo
7:40 am - 8:28 amBOI-SEA
1h 48mnonstop
$157Delta
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Sat, Dec 20 - Wed, Dec 24
Delta Logo
10:55 pm - 12:04 amSEA-GEG
1h 09mnonstop
Delta Logo
5:00 am - 6:23 amGEG-SEA
1h 23mnonstop
$157Delta
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Sat, Oct 11 - Sun, Oct 12
Hawaiian Airlines Logo
7:10 pm - 8:13 pmSEA-GEG
1h 03mnonstop
Hawaiian Airlines Logo
8:54 pm - 10:10 pmGEG-SEA
1h 16mnonstop
$166Hawaiian Airlines
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Fri, Oct 24 - Mon, Oct 27
Hawaiian Airlines Logo
12:00 pm - 2:36 pmSEA-BOI
1h 36mnonstop
Hawaiian Airlines Logo
6:45 pm - 8:55 pmBOI-SEA
3h 10m1 stop
$167Hawaiian Airlines
Find Deal
Fri, Oct 31 - Mon, Nov 3
United Airlines Logo
2:40 pm - 11:28 pmSEA-BOI
7h 48m1 stop
United Airlines Logo
6:20 am - 12:18 pmBOI-SEA
6h 58m1 stop
$177United Airlines
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Thu, Oct 16 - Sun, Oct 26
United Airlines Logo
7:00 am - 1:43 pmSEA-BOI
5h 43m1 stop
United Airlines Logo
6:20 am - 12:18 pmBOI-SEA
6h 58m1 stop
$196United Airlines
Find Deal
Thu, Oct 2 - Mon, Oct 6
Multiple Airlines Logo
6:12 am - 11:37 amSEA-BOI
28h 25m1 stop
Multiple Airlines Logo
8:26 pm - 9:09 pmBOI-SEA
1h 43mnonstop
$245Multiple Airlines
Find Deal
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.

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 72 hours was to Boise, at $117 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 72 hours was $117.

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.

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 $483 on average.

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 January, when tickets cost $182 (return) on average. On the other hand, the most expensive months are September and December, when the average cost of round-trip tickets is $317 and $276 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 Thursday, 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 59% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 22 weeks before departure.

Good to know

Low seasonApril
Cheapest flight$62
Best time to beat the crowds with an average 10% drop in price.
Most popular time to fly and prices are also 0% 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.

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

    The cheapest time of day to fly to Idaho is generally in the evening, when round-trip flights cost $213 on average. Morning departures are around 4% more expensive than evening flights, on average. The most expensive time of day to fly to Idaho is generally in the afternoon, which is peak travel time and where the average cost of a ticket is $223.

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.
8.0
Alaska AirlinesOverall score based on 10000 reviews
7.8Comfort
8.1Boarding
7.0Entertainment
7.1Food
8.5Crew
Airline reviews

Flight was delayed as it always is with Alaska airlines. Particularly to smaller airports. No AC on the plane so it was miserably hot.

4.0 OkayKristina, Sep 2025SEA - GTF
Read more Alaska Airlines reviews

Flight was delayed as it always is with Alaska airlines. Particularly to smaller airports. No AC on the plane so it was miserably hot.

Slow boarding and the flight crew hit me with the food cart

It was very nice flight going to Seattle and coming back to Omaha. Even got in early. Very easy to check in using the Alaska Airlines App. Thank you.

They offer the only direct flight from Seattle to Pittsburgh.

Seattle airport is a mess. New bag tag system has potential, but you need more signage to guide passengers through the process as to where to go next. Told to go in one direction and then met with a very rude agent when we did. He blamed his attitude on all the folks flying over labor day that were paying his salary. Gate area for D3 is a mess compared to the North terminal. Overall Alaska is number 1 in my book.

After we boarded there was quite a long time before we actually took off, and there were no announcements from crew about why we were delayed. Later when they did make announcements they were largely inaudible. There was no food (other than for purchase) on the flight and no entertainment. Thats not a complaint, just explaining my ratings in those categories. The flight was smooth. Baggage claim was rapid.

The airline staff was great! The best safety review ive ever had!

Agent boarding us in San Diego lectured me on showing up on time for the flight, and said that if I had been three minutes later, he would have denied myself and my wife boarding. Our trusted traveler numbers were not in the system, even though I entered them when I bought the tickets. Our food orders were not in the system, even though I entered them prior to the flight. My wife requires a wheelchair, and that was delayed on both flights.

Why was I charged for a glass of wine on one flight and not on another? Why no movie or TVs? It was a long flight.

I liked that it didn't take 10 hours to drive here. Super short trip!

Perfect flight both ways. On time, courteous staff, plane comfortable and cool. Best domestic flights I’ve had in awhile.

Really low quality food especially for an international flight. The crew also was surprisingly unpleasant except couple of ladies. I know we were not in first class but that’s no reason to treat customers as less.

Flight delayed for two and half hours and then canceled altogether due to mechanical issues. No mechanic onsite to fix so had to send one from LAX.

Crew was good. The reservation got mixed up and they didn't have my TSA number. I am also a Silver Medallion and wasn't able to use Sky Priority.

Delta made it easy, comfortable and timely. The crew was fantastic.

This route with Delta always has delays or is cancelled. Aircrafts seem smaller and older. I fly Delta quite a bit - haven’t had issues with the international flights. But this route has always been the troublesome one

Three seats in first class were broken and while they were able to still acommodate us it was looking very touch and go and they had others they could not acommodate

Mechanic delay in addition to a 2 hour change in takeoff time was frustrating.

Delayed due to thunderstorms and no in-flight service due to rough weather — both of which are out of Delta’s control. Flight was good overall.

The flight attendants in SLC were rude. I arrived 40 minutes early to gate. Ticket said I needed check in for seat assignments and tried check in and attendants said they weren’t doing it. And proceeded to never call me to give me a ticket so when time to board I received the very last seat. Please relay to employees to do their job better..,

They we able to seat my companion and I next to each other. Plane’s temperature was very cool. Willl be more prepared on return trip.

All was good and they were able to seat my travel companion next to me. Thank you.

Like the ample leg room. May as well not bother with snacks if it's only a two ounce bag of pretzels. Didn't use the entertainment option. Was there one?

What an amazing flight. I haven’t experienced this level of service in a flight in years. This will be the only way to fly to Hawaii for me in the future.

Kayak sold me a ticket after check in time. Could not check in. Could not get on flight.

Love you guys are so friendly and kind and wonderful

Agents talk too fast over intercom. I know it’s memorized and we’ve all heard it before. Just slow down a little. Stop charging for checked bags. I was pleased to get my bags promptly at each end of my flight.

Everything was great except having to check in at Alaska. That was a surprise and took extra time and effort. Should have been explained somewhere maybe on the HA electronic ticket.

It was clean and the crew was great. I wish the chairs could recline just a little more and you would provide small pillows for people with bad backs. My back is fused and a little support would be great.

I accidentally made this purchase and they wouldn’t refund me even though I called immediately to cancel it.

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

Information on your arrival and departure airports

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