IDA - SEA

$113 Find Cheap Flights from Idaho Falls to Seattle - Compare and Save

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 10/30. 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

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Everything you should know

Cheapest round-trip
$229
Typical prices: $297-$372
Multiple Airlines
Mon 8/24Thu 8/27
IDA - SEA • 1 stop
Cheapest non-stop
$237
Typical prices: $297-$408
Alaska Airlines
Sat 9/12Sat 9/19
IDA - SEA • Non-stop
Top airlines
Cheapest • from $237 (round-trip)
Best reviews • 7.9 score
Airline reviews
Airline reviews
+1
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Airline reviews
Airline reviews
+1
Nonstop flights
You can fly direct with Alaska Airlines. Average duration is 2h 04m
Direct flights
Direct flights
+1
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Direct flights
Direct flights
+1
When to book
in advance
Our data shows that travelers who book at least 4 weeks in advance save around 57% compared to booking last minute.
Insights
Insights
Insights
Insights
When to travel
Cheapest • 27% price drop
Most popular
Good to know
Good to know
+1
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Good to know
Good to know
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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

Mon, Aug 24 - Thu, Aug 27
Multiple Airlines Logo
5:33 pm - 10:39 am
IDA
-
SEA
18h 06m
1 stop
Multiple Airlines Logo
9:29 pm - 10:22 am
SEA
-
IDA
11h 53m
1 stop
$229Multiple Airlines
Sat, Sep 12 - Sat, Sep 19
Alaska Airlines Logo
6:18 am - 7:20 am
IDA
-
SEA
2h 02mnonstop
Alaska Airlines Logo
12:28 pm - 3:20 pm
SEA
-
IDA
1h 52mnonstop
$237Alaska Airlines
Sat, Oct 10 - Wed, Oct 14
Alaska Airlines Logo
6:09 am - 7:20 am
IDA
-
SEA
2h 11mnonstop
Alaska Airlines Logo
8:10 pm - 10:59 pm
SEA
-
IDA
1h 49mnonstop
$237Alaska Airlines
Thu, Sep 17 - Sat, Sep 19
Alaska Airlines Logo
2:01 pm - 3:07 pm
IDA
-
SEA
2h 06mnonstop
Alaska Airlines Logo
8:05 pm - 10:56 pm
SEA
-
IDA
1h 51mnonstop
$247Alaska Airlines
Fri, Oct 9 - Wed, Oct 14
Delta Logo
6:56 pm - 11:59 pm
IDA
-
SEA
6h 03m
1 stop
Delta Logo
11:05 am - 6:16 pm
SEA
-
IDA
6h 11m
1 stop
$257Delta
Tue, Oct 27 - Fri, Oct 30
Delta Logo
6:56 pm - 10:05 pm
IDA
-
SEA
4h 09m
1 stop
Delta Logo
11:05 am - 6:16 pm
SEA
-
IDA
6h 11m
1 stop
$257Delta
Thu, Oct 29 - Wed, Dec 2
Delta Logo
6:00 am - 9:10 am
IDA
-
SEA
4h 10m
1 stop
Delta Logo
5:35 am - 12:15 pm
SEA
-
IDA
5h 40m
1 stop
$257Delta
Mon, Aug 24 - Thu, Aug 27
Multiple Airlines Logo
5:33 pm - 10:39 am
IDA
-
SEA
18h 06m
1 stop
Multiple Airlines Logo
11:54 am - 10:22 am
SEA
-
IDA
21h 28m
2 stops
$261Multiple Airlines
Mon, Oct 12 - Thu, Oct 15
Multiple Airlines Logo
9:33 pm - 10:00 am
IDA
-
SEA
13h 27m
1 stop
Multiple Airlines Logo
7:00 pm - 4:00 pm
SEA
-
IDA
20h 00m
1 stop
$286Multiple Airlines
Fri, Oct 16 - Sun, Oct 18
Multiple Airlines Logo
10:49 pm - 10:00 am
IDA
-
SEA
12h 11m
1 stop
Multiple Airlines Logo
7:00 pm - 2:39 pm
SEA
-
IDA
18h 39m
1 stop
$287Multiple 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 August.

Flight prices are below average for this route right now.

Flights to Seattle from Idaho Falls usually cost between $297 and $372 in August.
The lowest price found in the past 5 days was $229 on Multiple Airlines (Aug 24-Aug 27).

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 Thursday, and avoid Tuesdays 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 January, where tickets cost $243 (return) on average. On the other hand, the most expensive months are March and July, where the average cost of round-trip tickets is $393 and $392 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 4 weeks before departure, which saves you about 57% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 15 weeks before departure.

Good to know

Low season

April

Cheapest flight

$113
Best time to beat the crowds but there is an average 6% increase in price.
Most popular time to fly and prices are also 1% 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 5 days, the lowest price for a flight from Idaho Falls to Seattle was $113 for a one-way ticket and $229 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?

    American Airlines, Alaska Airlines, Hawaiian Airlines, and Delta 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 Canadair (Bombardier) Regional Jet 700 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 $338 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 $627 and an overall rating of 7.8.

  • 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 $208 or less one-way and $357 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 12755 reviews
7.8Comfort
7.0Food
7.0Entertainment
8.1Boarding
8.5Crew
Airline reviews

Eva Airlines attendants were wonderful. I really enjoyed the hot meals. They always greeted me with a warm smile. I'm looking forward to flying back to the USA with them again!

10.0 ExcellentPamela, Jun 2026
BOI - SEA
Read more Alaska Airlines reviews

Eva Airlines attendants were wonderful. I really enjoyed the hot meals. They always greeted me with a warm smile. I'm looking forward to flying back to the USA with them again!

Flight was cancelled which destroyed the rest of our journey.

The overhead storage was already packed full when I boarded (I fly peasant class), but the attendant played some Tetris and made a spot for my small suitcase. Thanks!

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

From Las Vegas to Boise all went well. However, our flight was delayed in Boise and I missed my connecting flight from Seattle to Pasco. Moreover, the last flight to Pasco was full and I was booked on the 11:30 flight Sunday and given a hotel accommodation. However, I was scheduled to deliver the Sunday morning service at my church and needed to arrive no later than 10:00. Therefore, I booked a Delta flight scheduled to arrive in Pasco at 23:09. My piece of luggage checked in Las Vegas arrived in Pasco earlier today. I waited at the airport for over an hour last night to speak with an Alaska agent to no avail. I went back after church this morning in search of my piece of luggage and it could not be located. After waiting for 40 minutes to speak to the agent authorized to take my claim, he announced that he was closing the counter to assist on the flight line but not before providing me with a telephone number that would help me with filing my claim. Before I was able to make the call (due to other factors) I received a call from Alaska agent informing me that my luggage had just arrived and I am now waiting for it to be delivered. I deliberately took the more complicated route home to ensure that I would be home in plenty of time to prepare for myself for the Sunday service and accommodate my relatives’ needs. I believe the airport is undermanned given the number of flights coming in and going out. It was fiasco last night with three flights waiting for luggage and another flight landing within minutes. Today’s problems stemmed from a lack of cross training and a serious amount of cargo/baggage going out and too few people scheduled to cover.

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.

Flight was on time. Staff was polite and efficient. The snacks were good - only an hour and a half flight. No entertainment but didn't expect that. We brought our own things to do.

Everything smooth (including the landing) and on time. Easy. Thanks.

It was delayed twice and they still want $8 for wifi so i had to sit for an hour.

The boarding in Idaho Falls was terrific. The plane was a bit sad, and the snax were subpar. Mostly, I was just grossed out by the Alaska gates in Seattle. EW! Smelly and cramped and dingy!

Not really a “Delta” problem but worth mentioning: Boarding was a difficult process. TSA seemed understaffed and Pre-Check took longer than regular TSA. The supervisor was frazzled and yelled at travelers. Once through TSA, we had to put our carry-ons through another x-ray machine. Then queue up to board with both boarding pass and ID. Then, when we got to the stairs on the tarmac, we had to show our boarding pass again. Maybe this is just normal for Kona since the terminal is outdoors (but still a “secured” area).

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 was delayed, we could have been notified earlier and in a consistent manner. App was not refreshing for another passenger to get the latest flight status. We could have stayed and waited at the hotel instead of waiting at the airport had we known the flight was going to delayed for more than 5 hours. The toilet is too tight, and needs to be cleaned more frequently (every hour). The entertainment screen froze, the touch screen not responding to touch. We were upgraded to comfort, it is more comfortable than regular economy seats.

It was fine. 55 minute flight. No snacks or beverage service offered. Boarding went smoothly and my walker was waiting for me on the jet way.

My flight was cencaled due with the bad weather on Sunday the crew was poorly mistaken my luggage supposed depart with my flight instead I didn’t have my luggage for almost 3 days the website is poorly respond to my complain until I have someone to do it my connection smooth their not even respon or email me even the have my luggage

8 hours late and the plane smelled like urine, that smell in the morning when your child wet the bed in the night.

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

My husband is very tall and we generally fly Delta Comfort. We used our companion benefit, and our seats were coach and extremely uncomfortable........ horrid even

Yall need to integrate your system with Alaska more efficiently. They booted me off the first flight because of a discrepancy on your end.

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.

Delayed and cancelled flights were hard and very stressful, both ways!

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

The entire crew had everything handled and truly worked together. More than once, I saw them hustle down the aisle and back just to serve customers.

The flight was great. But the problem is we actually booked a flight with Hawaiian Airlines. We even received a Hawaiian Airlines confirmation number. So this made it really difficult to check in the online. So I had to call Hawaiian Airlines to get our Alaskan Airlines confirmation code to check in. Also weren’t told we were flying on Alaskan, but once we got on the plane, everything went well!

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.

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.

No unruly passengers, started on time, easy transition to next flight.

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

Information on your arrival and departure airports