IDA - SEA

$89 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 4/18. 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 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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Everything you should know

Cheapest round-trip
$207
Typical prices: $206-$299
Alaska Airlines
Sat 4/4Mon 4/6
IDA - SEA • Non-stop
Cheapest one-way
$89
Typical prices: $108-$224
Alaska Airlines
Sat 4/18
IDA - SEA • Non-stop
Top airlines
Cheapest • from $207 (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. Average duration is 2h 04m
Direct flights
Direct flights
+1
+1
Direct flights
Direct flights
+1
Top layover airports
Cheapest • Avg $440 (round-trip)
Shortest trip • 5h 11m (one-way)
Insights
Insights
Insights
Insights
When to book
in advance
Our data shows that travelers who book at least 3 weeks in advance save around 39% 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
Good to know
Good to know
+1
Start a new search
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Flight Deals
Booking Insights
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

Sat, Apr 4 - Mon, Apr 6
Alaska Airlines Logo
6:00 am - 7:05 am
IDA
-
SEA
2h 05mnonstop
Alaska Airlines Logo
1:32 pm - 4:19 pm
SEA
-
IDA
1h 47mnonstop
$207Alaska Airlines
Sat, Apr 4 - Mon, Apr 6
Alaska Airlines Logo
6:00 am - 7:05 am
IDA
-
SEA
2h 05mnonstop
Alaska Airlines Logo
1:32 pm - 4:19 pm
SEA
-
IDA
1h 47mnonstop
$217Alaska Airlines
Sat, Apr 4 - Sun, Apr 5
Hawaiian Airlines Logo
6:00 am - 7:05 am
IDA
-
SEA
2h 05mnonstop
Hawaiian Airlines Logo
8:04 pm - 10:52 pm
SEA
-
IDA
1h 48mnonstop
$222Hawaiian Airlines
Sat, Apr 4 - Mon, Apr 6
Alaska Airlines Logo
6:00 am - 7:05 am
IDA
-
SEA
2h 05mnonstop
Alaska Airlines Logo
1:32 pm - 4:19 pm
SEA
-
IDA
1h 47mnonstop
$227Alaska Airlines
Tue, May 12 - Tue, May 19
Delta Logo
6:54 pm - 12:12 am
IDA
-
SEA
6h 18m
1 stop
Delta Logo
5:30 am - 10:47 am
SEA
-
IDA
4h 17m
1 stop
$237Delta
Fri, Apr 24 - Mon, May 4
Alaska Airlines Logo
4:06 pm - 5:00 pm
IDA
-
SEA
1h 54mnonstop
Alaska Airlines Logo
7:54 pm - 10:40 pm
SEA
-
IDA
1h 46mnonstop
$242Alaska Airlines
Fri, Apr 24 - Mon, May 4
Alaska Airlines Logo
4:06 pm - 5:00 pm
IDA
-
SEA
1h 54mnonstop
Alaska Airlines Logo
7:54 pm - 10:40 pm
SEA
-
IDA
1h 46mnonstop
$257Alaska Airlines
Tue, Apr 21 - Sat, Apr 25
Delta Logo
6:58 pm - 11:59 pm
IDA
-
SEA
6h 01m
1 stop
Delta Logo
5:55 pm - 10:40 pm
SEA
-
IDA
3h 45m
1 stop
$258Delta
Sun, Mar 29 - Tue, Mar 31
Alaska Airlines Logo
6:00 am - 7:05 am
IDA
-
SEA
2h 05mnonstop
Alaska Airlines Logo
8:04 pm - 10:52 pm
SEA
-
IDA
1h 48mnonstop
$277Alaska Airlines
Sat, Apr 18 - Tue, Apr 21
Alaska Airlines Logo
4:59 pm - 6:02 pm
IDA
-
SEA
2h 03mnonstop
Alaska Airlines Logo
8:04 pm - 10:52 pm
SEA
-
IDA
1h 48mnonstop
$297Alaska Airlines
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.

How much is a round-trip flight from Idaho Falls 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 Idaho Falls to Seattle departing in April.

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 Thursday and more expensive on a Sunday. On your return trip to Idaho Falls, you should consider flying back on a Wednesday, 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 March and November, where the average cost of round-trip tickets is $393 and $367 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.

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 $327 on average.

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 3 weeks before departure, which saves you about 39% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 12 weeks before departure.

Good to know

Low seasonJanuary
Cheapest flight$89
Best time to beat the crowds with an average 22% drop in price.
Most popular time to fly with an average 9% increase in price.
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 $89 for a one-way ticket and $207 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?

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

  • 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 $300 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 $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 $247 or less one-way and $332 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.
7.9
Alaska AirlinesOverall score based on 12052 reviews
7.1Food
7.0Entertainment
8.1Boarding
7.8Comfort
8.5Crew
Airline reviews

Snacks for our toddler could have been better, front the standpoint of variety but that’s not any different from other airlines.

8.0 ExcellentAllison, Mar 2026
BOI - SEA
Read more Alaska Airlines reviews

Snacks for our toddler could have been better, front the standpoint of variety but that’s not any different from other airlines.

Never got on because first part of trip was cancelled and we have no idea when we will get rebooked…

They cancelled the flight and provided no support to find another way home or how to get a refund. Links provided didn’t work and phone wait times were over eight hours. Battery on my phone couldn’t last long enough.

signage from the upper area to the tram down 2 escalator!

The WiFi worked for entertainment but a nearly 4 hour flight should have personal tvs

Generally very good. Waiting (due to de-icing and traffic) in plane to take off was a put-off. But it's not the airline's fault. I find Airbus more comfortable than Boeing.

Lot's of good food and free entanglement made the trip pleasurable and fun.

The food was terrible, worse that what you get with UA, an already one of the lowest standards to beat. How cheap one could be, providing that kind of junk food in first class. Unbelievable! The seats were not very comfortable either. And there were no screens either, not that I cared much but for you to know.

Easy check-in. Good customer service. Had to check carry-on due to lack of overhead space. Wish the airplane was configured with more overhead area so this doesn't usually happen.

Great flights, little turbulence, pilots kept stewardesses seated & safe, all staff friendly & professional

First class is comfortable. Enjoyed a movie and was able to relax compared to coach.

Loved flying First Class. Very comfortable. The seat was amazing. Enjoyed a movie and was able to relax so much better than in coach.

We landed and sat on the tarmac for 45 minutes because they only have one gate at the airport and there was another plane running late so we had to wait

The WiFi was not working. That made for a long flight.

Absolutely no communication on why there's a delay and multiple flight time reschedules. I would have canceled the flight and drove back home if I known it was going to be rescheduled 3 or 4 times.

Another late night flight and MORE men belligerently drinking and yelling. I had to move from first to economy because they were so obnoxious and disruptive. Crazy to go from a cozy chair to cardboard when you were supposed to be in first. Delta allows was too much drinking which leads to belligerent behavior.

I was in first class and literally the men behind me were so aggressively loud I moved myself to economy. This has become so common on Delta - people using audio without headphones, and men on 12am / late night flights drinking and yelling to talk to each other which prevents anyone around them from resting. Pretty crazy to have to move from first to economy (poorer service, less comfort...). Wild wild. Looking into other airlines.

Everything was good except wifi and a leaking drink chiller. The floor was all wet and my bag was soaked. Did not notice until debarking. Have not heard back from Delta. Even though this was leg one of an international flight in first class, they denied access to their Sky Club - very disappointing!

Prior to takeoff, the pilot told us there was a possibility of not being able to land and going to Portland. Well that happened, we took off and then did 8 loops around Spokane before the pilot told us we ran out of fuel and had to go to Portland. So for a 35 minute flight we have now been on the plane for 3 hours (boarded at 6:50 am and landed in Portland at 10:30). Then, we just sat in Portland's airport with no updates of when we can start heading back. All of a sudden, our pilots and crew just left, leaving us stranded in a different city and state. We continued to sit in Portland until we finally got a new crew assigned and boarded the plane (This was from 10:30-2). We then sat on the plane for an additional hour before take off because they had to count us multiple times. We finally landed in Spokane at 3:55 PM. So a flight that should have taken at max an hour took us 10 hours and we missed the majority of the recruiting event we went for.

Staff was great! Kind and cordial! Middle seat row 28 seat B has a hump in it. Trays were getting stuck when putting down and up. Good flight

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.

I liked the Starlink WiFi but didn't like how they said they were the only airline to offer a free meal and it turns out to be just a standalone sandwich and then charge for snacks to go with it. Rather have the free snacks like Southwest, but have the option to purchase a decent meal for a 5+ hour flight.

Flight scheduled to take off at 5.55pm but it did not take off until 7pm due to some food delivery delay.

Unfortunately, I was put into the middle seat in the first row of premium seating. Sounds nice right? No! that is the worst seat in the plane. I wish I was in economy rather than be in that seat! There is no seat back pocket, no tray table, no charger. Nothing! so unless you're row mates are willing to let you share their basic amenities any flyer should have, you are stuck. It was the worst experience ever! And the flight attendant forgot to take my drink order. I felt like the forgotten flyer.

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

Information on your arrival and departure airports