SEA - IDA

$167 Find Cheap Flights from Seattle to Idaho Falls

This is the cheapest round-trip flight price found by a KAYAK user in the last 72 hours by searching for a flight from Seattle to Idaho Falls departing on 2/24. 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 Falls

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

Cheap Flights from Seattle to Idaho Falls (SEA-IDA)

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

Tue, Feb 24 - Wed, Mar 4
Alaska Airlines Logo
12:40 pm - 3:23 pmSEA-IDA
1h 43mnonstop
Alaska Airlines Logo
4:00 pm - 4:59 pmIDA-SEA
1h 59mnonstop
$167Alaska Airlines
Find Deal
Thu, Dec 4 - Mon, Dec 8
Alaska Airlines Logo
9:15 pm - 11:59 pmSEA-IDA
1h 44mnonstop
Alaska Airlines Logo
5:07 pm - 6:16 pmIDA-SEA
2h 09mnonstop
$177Alaska Airlines
Find Deal
Tue, Feb 17 - Wed, Feb 25
Delta Logo
4:55 pm - 10:21 pmSEA-IDA
4h 26m1 stop
Delta Logo
6:45 pm - 12:11 amIDA-SEA
6h 26m1 stop
$238Delta
Find Deal
Sun, Dec 7 - Wed, Dec 10
Delta Logo
5:00 pm - 10:21 pmSEA-IDA
4h 21m1 stop
Delta Logo
1:17 pm - 4:54 pmIDA-SEA
4h 37m1 stop
$258Delta
Find Deal
Wed, Nov 26 - Wed, Dec 3
Multiple Airlines Logo
12:51 pm - 1:02 pmSEA-IDA
23h 11m2 stops
Multiple Airlines Logo
12:19 pm - 10:06 amIDA-SEA
22h 47m1 stop
$388Multiple Airlines
Find Deal
Sun, Dec 28 - Sun, Jan 4
Multiple Airlines Logo
6:05 pm - 4:12 pmSEA-IDA
21h 07m1 stop
Multiple Airlines Logo
6:21 pm - 6:53 pmIDA-SEA
25h 32m1 stop
$409Multiple Airlines
Find Deal
Sun, Dec 7 - Wed, Dec 10
American Airlines Logo
7:00 am - 10:36 pmSEA-IDA
14h 36m1 stop
American Airlines Logo
7:00 am - 6:20 pmIDA-SEA
12h 20m2 stops
$467American Airlines
Find Deal
Tue, Feb 17 - Wed, Feb 25
United Airlines Logo
3:16 pm - 1:30 pmSEA-IDA
21h 14m1 stop
United Airlines Logo
2:40 pm - 11:18 amIDA-SEA
21h 38m2 stops
$480United Airlines
Find Deal
Tue, Feb 17 - Wed, Feb 25
United Airlines Logo
3:16 pm - 1:30 pmSEA-IDA
21h 14m1 stop
United Airlines Logo
2:40 pm - 11:18 amIDA-SEA
21h 38m3 stops
$492United Airlines
Find Deal
Sun, Dec 7 - Wed, Dec 10
American Airlines Logo
7:00 am - 10:36 pmSEA-IDA
14h 36m1 stop
American Airlines Logo
7:00 am - 6:20 pmIDA-SEA
12h 20m2 stops
$512American Airlines
Find Deal

Everything you should know

Top airlines
Alaska Airlines
Cheapest • from $167 (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 60% compared to booking last minute.
Insights
Insights
Insights
Insights
When to travel
May
Cheapest • 27% price drop
June
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
Cheapest round-trip
$167
Overall average: $253
Alaska Airlines
Tue 2/24Wed 3/4
SEA - IDA • Non-stop
Cheapest one-way
$189
Typical prices: $111-$236
Alaska Airlines
Fri 11/14
SEA - IDA • Non-stop
Start a new search
KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to Idaho Falls!
Booking Insights

KAYAK's insights & trends for Seattle to Idaho Falls flights

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

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

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

When flying from Seattle to Idaho Falls, you should consider leaving on a Monday and avoid Sundays if you are looking for the best rates. For your return to Seattle, you’ll find the best rates on Thursdays and the most expensive ones on Sundays.

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

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Seattle to Idaho Falls, 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 Falls is May, where tickets cost $238 (return) on average. On the other hand, the most expensive months are March and June, where the average cost of round-trip tickets is $448 and $427 respectively.

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

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 $287, prices are generally cheapest when you fly direct.

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

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 Falls, 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 Falls, 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 23 weeks before departure.

Good to know

Low seasonMarch
Cheapest flight$167
Best time to beat the crowds but there is an average 37% increase in price.
Most popular time to fly with an average 30% increase in price.
Flight from Seattle to Idaho Falls

When to book flights from Seattle to Idaho Falls

Are your dates flexible? Find out the best times to travel from Seattle to Idaho Falls 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 Seattle to Idaho Falls

  • What is the cheapest flight from Seattle to Idaho Falls?

    In the last 3 days, the lowest price for a flight from Seattle to Idaho Falls was $189 for a one-way ticket and $167 for a round-trip.

  • Do I need a passport to fly between Seattle and Idaho Falls?

    No

  • Which airlines offer Wi-Fi service onboard planes from Seattle to Idaho Falls?

    Only Alaska Airlines offers inflight Wi-Fi service on the Seattle to Idaho Falls flight route.

  • Which aircraft models fly most regularly from Seattle to Idaho Falls?

    The Embraer 175 is the aircraft model that flies most regularly on the Seattle to Idaho Falls flight route.

  • Which airline alliances offer flights from Seattle to Idaho Falls?

    SkyTeam, and oneworld are the airline alliances operating flights between Seattle and Idaho Falls, with SkyTeam being the most commonly used for this route.

  • On which days can I fly direct from Seattle to Idaho Falls?

    There are nonstop flights from Seattle to Idaho Falls on a daily basis.

  • Which is the best airline for flights from Seattle to Idaho Falls, Alaska Airlines or Delta?

    The two airlines most popular with KAYAK users for flights from Seattle to Idaho Falls are Alaska Airlines and Delta. With an average price for the route of $316 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 $567 and an overall rating of 7.9.

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

    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 Falls.

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

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

    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 Idaho Falls with an airline and back to Seattle with another airline. Booking your flights between Seattle and IDA 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 Seattle to Idaho Falls?

    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 Idaho Falls from Seattle 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 Seattle to Idaho Falls

  • Looking for a cheap flight? 25% of our users found flights on this route for $254 or less one-way and $197 or less round-trip.

Prefer to fly direct from Seattle to Idaho Falls?

 
Direct data is based off flight results for the next 60 days. Find direct flights from all airlines flying direct from Seattle/Tacoma Intl to Idaho Falls Fanning Field.
Find which airlines fly direct from Seattle/Tacoma Intl Airport to Idaho Falls Fanning Field Airport, which days they fly and book direct flights.

Direct departures

Seattle/Tacoma Intl to Idaho Falls Fanning Field

Monday

Alaska Airlines

Alaska Airlines

Tuesday

Alaska Airlines

Alaska Airlines

Wednesday

Alaska Airlines

Alaska Airlines

Thursday

Alaska Airlines

Alaska Airlines

Friday

Alaska Airlines

Alaska Airlines

Saturday

Alaska Airlines

Alaska Airlines

Sunday

Alaska Airlines

Alaska Airlines

See more direct flights

Direct returns

Idaho Falls Fanning Field to Seattle/Tacoma Intl

Monday

Alaska Airlines

Alaska Airlines

Tuesday

Alaska Airlines

Alaska Airlines

Wednesday

Alaska Airlines

Alaska Airlines

Thursday

Alaska Airlines

Alaska Airlines

Friday

Alaska Airlines

Alaska Airlines

Saturday

Alaska Airlines

Alaska Airlines

Sunday

Alaska Airlines

Alaska Airlines

See more direct flights

Reviews of the top 3 airlines serving from Seattle to Idaho Falls

 
See real verified KAYAK customer reviews for airlines flying from Seattle to Idaho Falls. 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 Falls? 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 11214 reviews
7.1Food
8.5Crew
7.8Comfort
8.1Boarding
7.0Entertainment
Airline reviews

Its bumpy but I can say its safe flight ,Thanks Alaska airline for bringing me in my destination😊.

8.0 ExcellentMary Grace, Oct 2025SEA - BNA
Read more Alaska Airlines reviews

Its bumpy but I can say its safe flight ,Thanks Alaska airline for bringing me in my destination😊.

Almost 3 hr delay in Settle with very little information available to passengers. They boarded the plane and we waited for a long time inside the plane as well.

This was our first time flying with Alaska. It was a seamless experience, with comfortable seats and leg room. Staff were friendly and helpful.

Flight on time. Crew good. Seating Bad. Have to pay extra on a not cheap flight to avoid being next to toilet.

The crew was great! Passengers were nice. Just an fyi that I heard several of them complain that the snack was not gluten free. Many people got handed the snack and then promptly gave it back to the flight attendant. Might be good to look into another option as such a high percentage of people in CO and WA are gf. Cheers!

Food and entertainment not applicable - standard drinks and cinnamon cookies; crew did not do a song and dance for us so no entertainment. I like the slightly better leg room than American Airlines - at least it felt that way. Flight crew and atmosphere seemed more welcoming than American, too.

It was fine, mostly I was just happy to be on my last leg home. No in flight entertainment but that's forgivable since it was only a 2 hour flight.

Was delayed in Newark 24 hours due to mechanical problems. The staff was very helpful in trying to make the best of a trying situation. In SeaTac, they changed gates and times. Usually have no problems from SeaTac.

Flight was cancelled, then rebooked on a flight that I was unable to get through since they had closed the gate.

Terrible. We were bumped off our flight to another and weren't sent notice until we were on our prior flight. We got home four hours later and the airline couldn't have cared less.

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.

Non stop on long haul is the way to go. Great experience

The flight used a B767 with a very old interior from before 2014. The entertainment system did not work at all during the flight despite attempts to reset the system. It was like they flew this route just to be competitive.

They changed planes and the new plane couldn’t carry enough fuel to fly across the country so we had to stop in Kansas City to refuel. Flight was delayed .

Flight was too crowded and seats are too small, especially since passengrs are getting larger. Having a middle seat is ALWAYS tough! Woman on my left was large & kept creeping in to my space. Flight personnel were great! Have more savory rather than sweet snacks please.

Flight was crowded and the woman sitting on my left was large & kept crouching in to my space. You need bigger seats or smaller passengers to fit into the seats you DO have! Snack were OK. Would appreciate if airlines had more savory rather than sweet snacks, thank you!

Delayed flight (1hour) plus a long layover after an overnight flight with no backup plane available.

We were delayed, which I think had to do with air traffic control. Otherwise, everything was great.

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.

The food options were limited and very specific. Some type of entertainment option for a 4.5 hour flight would have been nice.

Flight was smooth and comfortable. We were able to check a bag at counter due to full flight and boarded with an earlier group. We were there very early and didn’t hear the gate change just noticed our flight was no longer displayed st the gate. There were two other flights with gate shuffles - may be unavoidable but not desirable. First time I had to print my own luggage tag and attach at arrival. Not a fan of that process.

The crew was EXTREMELY helpful And sweet and the flight was smooth!

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

Information on your arrival and departure airports

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