IDA - SEA

$149 Find Cheap Flights from Idaho Falls 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 Idaho Falls to Seattle departing on 11/9. 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 Seattle

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

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

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

Tue, Dec 23 - Sat, Dec 27
Alaska Airlines Logo
6:00 am - 7:20 amIDA-SEA
2h 20mnonstop
Alaska Airlines Logo
9:21 pm - 12:07 amSEA-IDA
1h 46mnonstop
$197Alaska Airlines
Find Deal
Sat, Oct 18 - Tue, Oct 21
Delta Logo
6:53 pm - 10:22 pmIDA-SEA
4h 29m1 stop
Delta Logo
5:25 am - 12:33 pmSEA-IDA
6h 08m1 stop
$217Delta
Find Deal
Tue, Dec 23 - Thu, Dec 25
Alaska Airlines Logo
6:00 am - 7:20 amIDA-SEA
2h 20mnonstop
Alaska Airlines Logo
9:21 pm - 12:07 amSEA-IDA
1h 46mnonstop
$227Alaska Airlines
Find Deal
Tue, Feb 24 - Tue, Mar 24
Hawaiian Airlines Logo
8:00 am - 8:59 amIDA-SEA
1h 59mnonstop
Hawaiian Airlines Logo
12:40 pm - 3:20 pmSEA-IDA
1h 40mnonstop
$228Hawaiian Airlines
Find Deal
Tue, Feb 3 - Wed, Feb 25
Delta Logo
6:45 pm - 12:11 amIDA-SEA
6h 26m1 stop
Delta Logo
4:55 pm - 10:21 pmSEA-IDA
4h 26m1 stop
$237Delta
Find Deal
Tue, Feb 24 - Tue, Mar 24
Delta Logo
1:05 pm - 5:00 pmIDA-SEA
4h 55m1 stop
Delta Logo
4:55 pm - 10:21 pmSEA-IDA
4h 26m1 stop
$247Delta
Find Deal
Thu, Dec 25 - Thu, Dec 25
Alaska Airlines Logo
6:00 am - 7:20 amIDA-SEA
2h 20mnonstop
Alaska Airlines Logo
11:20 am - 2:06 pmSEA-IDA
1h 46mnonstop
$251Alaska Airlines
Find Deal
Thu, Dec 11 - Sun, Dec 21
Alaska Airlines Logo
5:04 pm - 6:13 pmIDA-SEA
2h 09mnonstop
Alaska Airlines Logo
9:21 pm - 12:07 amSEA-IDA
1h 46mnonstop
$257Alaska Airlines
Find Deal
Sun, Oct 5 - Tue, Oct 14
Alaska Airlines Logo
6:00 am - 7:11 amIDA-SEA
2h 11mnonstop
Alaska Airlines Logo
7:55 pm - 10:38 pmSEA-IDA
1h 43mnonstop
$258Alaska Airlines
Find Deal
Tue, Sep 30 - Thu, Oct 2
Hawaiian Airlines Logo
3:57 pm - 4:53 pmIDA-SEA
1h 56mnonstop
Hawaiian Airlines Logo
12:34 pm - 3:20 pmSEA-IDA
1h 46mnonstop
$358Hawaiian Airlines
Find Deal

Everything you should know

Top airlines
Alaska Airlines
Cheapest • from $197 (round-trip)
Alaska Airlines
Best reviews • 8.0 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
When to book
2 weeks
in advance
Our data shows that travelers who book at least 2 weeks in advance save around 32% compared to booking last minute.
Insights
Insights
Insights
Insights
When to travel
April
Cheapest • 26% price drop
May
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
Cheapest round-trip
$197
Overall average: $338
Alaska Airlines
Tue 12/23Sat 12/27
IDA - SEA • Non-stop
Cheapest non-stop
$197
Typical prices: $302-453
Alaska Airlines
Tue 12/23Tue 12/30
IDA - SEA • 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 Seattle!
Booking Insights

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

Get data-powered insights and trends into flights from Idaho Falls to Seattle 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 Idaho Falls to Seattle?

The average price of all round-trip flights from Idaho Falls 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 Saturday and more expensive on a Tuesday. On your return trip to Idaho Falls, you should consider flying back on a Tuesday, and avoid Sundays for better deals.

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

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Idaho Falls 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 Idaho Falls to Seattle is April, where tickets cost $227 (return) on average. On the other hand, the most expensive months are January and November, where the average cost of round-trip tickets is $373 and $368 respectively.

Can I save money by flying with a layover from Idaho Falls 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 $267, prices are generally cheapest when you fly direct.

How far in advance should I book a flight from Idaho Falls 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 Idaho Falls 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 Idaho Falls to Seattle, you should book around 2 weeks before departure, which saves you about 32% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 7 weeks before departure.

Good to know

Low seasonFebruary
Cheapest flight$149
Best time to beat the crowds with an average 23% drop in price.
Most popular time to fly and prices are also 4% lower on average.
Flight from Idaho Falls to Seattle

When to book flights from Idaho Falls to Seattle

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

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

    In the last 3 days, the lowest price for a flight from Idaho Falls to Seattle was $149 for a one-way ticket and $197 for a round-trip.

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

    Even though you are not required to have a passport, keep in mind that an official ID is needed to board the airplane.

  • Which airports will I be using when flying from Idaho Falls to Seattle?

    When flying out of Idaho Falls you will be using Idaho Falls Fanning Field. You will be landing at Seattle, also known as Seattle/Tacoma Intl.

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

    Alaska Airlines, Hawaiian Airlines, Delta, and American Airlines offer inflight Wi-Fi service on the Idaho Falls to Seattle flight route.

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

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

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

    oneworld is the only airline alliance operating flights between Idaho Falls and Seattle.

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

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

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

    The two airlines most popular with KAYAK users for flights from Idaho Falls to Seattle are Alaska Airlines and Delta. With an average price for the route of $303 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 $286 and an overall rating of 7.9.

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

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Seattle from Idaho Falls 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 Idaho Falls 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 Idaho Falls with another airline. Booking your flights between Idaho Falls 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 Idaho Falls 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 Idaho Falls 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 Idaho Falls to Seattle

  • Looking for a cheap flight? 25% of our users found flights on this route for $199 or less one-way and $376 or less round-trip.

Prefer to fly direct from Idaho Falls to Seattle?

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

Direct departures

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

Direct returns

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

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

 
See real verified KAYAK customer reviews for airlines flying from Idaho Falls 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 Idaho Falls 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.
8.0
Alaska AirlinesOverall score based on 10000 reviews
7.0Entertainment
8.5Crew
8.1Boarding
7.1Food
7.8Comfort
Airline reviews

My flight was delayed 2 hours which led me to lose my connection. As a consequence, I had to spend hours changing flights and hotel reservations to arrange my arrival to Vancouver.

2.0 MediocreAnonymous, Sep 2025BWI - SEA
Read more Alaska Airlines reviews

My flight was delayed 2 hours which led me to lose my connection. As a consequence, I had to spend hours changing flights and hotel reservations to arrange my arrival to Vancouver.

No Free Wifi and the flight was a tad late.

The plane was clean. They got us to the destination. It was very difficult to hear the announcements at the gate. The person was speaking way too quickly, and the sound system did not carry to all parts of the seating area at the gate. The flight left more than an hour late, which left many of the passengers missing connections.

The flights left both airports on schedule. The flight from Idaho Falls to Seattle was a typical commuter trip. The flight from Seattle to Maui was not good: It was too long for a flight in a single-aisle plane and too cramped. I kept asking myself if I would ever visit Maui again if airlines continue to run this long flight like a typical short commuter flight. I am not looking forward to the trip home.

The chicken salad was very small, the lettuce was wilted and there was no flavor. The hamburger was excellent.

Mid flight we were bothered by a bee. Kind of odd, but a bee allergy made it a bit stressful. Attendants passed by our aisle during service multiple times. Otherwise, it was fine.

5 1/2 hour flight with no food service or options is inexcusable.

Mostly good. Delayed which in my experience so far happens often with Alaska Airlines. Thank you.

Excellent overall, but had to wait 30 months while taxiing. In fact, I’m still on the plane now!

We received a check-in reminder the day before the flight, and it listed the flight at a later time. Correct flight number, same seats, etc. for 3 hours later. I called the airline to confirm and they had no record of the email. The info was wrong, and we would have missed our flight if we'd assumed it was correct. I want to know where/how we received this incorrect info.

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 Idaho Falls to Seattle

Information on your arrival and departure airports

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