$84 Find Cheap Flights from Idaho Falls to Washington

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 Washington departing on 3/6. 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 Washington

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

Cheapest round-trip prices found by our users on KAYAK in the last 72 hours
Seattle
Seattlenonstop$157
Spokane
Spokane1 stop$257
Pasco
Pasco1 stop$259
Seattle
Seattlenonstop$157
Spokane
Spokane1 stop$257
Pasco
Pasco1 stop$259

Book Cheap Idaho Falls to Washington Plane Tickets

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

Mon, Mar 2 - Tue, Mar 10
Alaska Airlines Logo
5:20 pm - 6:21 pm
IDA
-
SEA
2h 01mnonstop
Alaska Airlines Logo
1:59 pm - 4:43 pm
SEA
-
IDA
1h 44mnonstop
$157Alaska Airlines
Wed, Feb 25 - Sun, Mar 1
Alaska Airlines Logo
5:20 pm - 6:21 pm
IDA
-
SEA
2h 01mnonstop
Alaska Airlines Logo
8:52 pm - 11:36 pm
SEA
-
IDA
1h 44mnonstop
$197Alaska Airlines
Fri, Mar 6 - Fri, Mar 13
Alaska Airlines Logo
8:00 am - 9:07 am
IDA
-
SEA
2h 07mnonstop
Alaska Airlines Logo
8:52 pm - 11:36 pm
SEA
-
IDA
1h 44mnonstop
$207Alaska Airlines
Fri, Mar 27 - Mon, Mar 30
Alaska Airlines Logo
5:59 pm - 7:02 pm
IDA
-
SEA
2h 03mnonstop
Alaska Airlines Logo
8:04 pm - 10:52 pm
SEA
-
IDA
1h 48mnonstop
$227Alaska Airlines
Wed, May 20 - Wed, May 27
Alaska Airlines Logo
4:08 pm - 11:53 am
IDA
-
SEA
20h 45m
1 stop
Alaska Airlines Logo
8:00 pm - 10:45 pm
SEA
-
IDA
1h 45mnonstop
$230Alaska Airlines
Mon, Mar 9 - Sat, Mar 21
Delta Logo
6:55 pm - 12:01 am
IDA
-
SEA
6h 06m
1 stop
Delta Logo
5:30 am - 12:27 pm
SEA
-
IDA
5h 57m
1 stop
$232Delta
Wed, Mar 11 - Mon, Mar 16
Alaska Airlines Logo
5:20 pm - 6:21 pm
IDA
-
SEA
2h 01mnonstop
Alaska Airlines Logo
8:52 pm - 11:36 pm
SEA
-
IDA
1h 44mnonstop
$237Alaska Airlines
Wed, May 20 - Sun, May 24
Alaska Airlines Logo
4:08 pm - 8:15 pm
IDA
-
SEA
5h 07m
1 stop
Alaska Airlines Logo
8:00 pm - 10:45 pm
SEA
-
IDA
1h 45mnonstop
$250Alaska Airlines
Mon, Mar 9 - Tue, Mar 17
Alaska Airlines Logo
5:20 pm - 6:21 pm
IDA
-
SEA
2h 01mnonstop
Alaska Airlines Logo
8:52 pm - 11:36 pm
SEA
-
IDA
1h 44mnonstop
$252Alaska Airlines
Mon, Mar 9 - Sat, Mar 21
Delta Logo
6:55 pm - 12:01 am
IDA
-
SEA
6h 06m
1 stop
Delta Logo
5:30 am - 12:27 pm
SEA
-
IDA
5h 57m
1 stop
$262Delta
Booking Insights

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

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

What is the cheapest Idaho Falls to Washington flight route?

Data is based on round-trip flight searches on KAYAK over the past month.

The cheapest ticket to Washington from Idaho Falls found in the last 72 hours was to Seattle, at $177 round-trip. The most popular route is from Idaho Falls (IDA) to Seattle (SEA), and the cheapest round-trip airline ticket found on this route in the last 72 hours was $177.

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

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 $297, prices are generally cheapest when you fly direct.

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

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Idaho Falls to Washington, 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 Washington is February, when tickets cost $227 (return) on average. On the other hand, the most expensive months are January and November, when the average cost of round-trip tickets is $418 and $367 respectively.

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

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

Your flight ticket price will generally be cheaper if you fly to Washington 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.

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

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 Washington, 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 Washington, you should book around 2 weeks before departure, which saves you about 20% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 20 weeks before departure.

Good to know

Low seasonOctober
Cheapest flight$69
Best time to beat the crowds but there is an average 3% increase in price.
Most popular time to fly and prices are also 9% lower on average.
Flight from Idaho Falls to Portland

FAQs - booking Washington flights

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

    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 Washington.

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

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

    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 Idaho Falls to Washington 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 Idaho Falls to Washington?

    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 Idaho Falls to Washington 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 Washington?

    The cheapest time of day to fly to Washington is generally in the evening, when round-trip flights cost $400 on average. Morning departures are around 11% more expensive than evening flights, on average. The most expensive time of day to fly to Washington is generally in the afternoon, which is peak travel time and where the average cost of a ticket is $553.

Top tips for finding cheap flights to Washington

  • Looking for a cheap flight? 25% of our users found tickets from Idaho Falls to the following destinations at these prices or less: Portland $73 one-way - $287 round-trip; Seattle $189 one-way - $297 round-trip

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

 
See real verified KAYAK customer reviews for airlines flying from Idaho Falls to Washington. 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 Washington? 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 11847 reviews
7.0Entertainment
7.8Comfort
7.1Food
8.1Boarding
8.5Crew
Airline reviews

Wheelchair assistant was on the spot, and very helpful. Gate agent was kind, and made sure I boarded the plane without having to try to hurry with my painful hip. My seat was so comfortable, 20A. I am tall, 5'9 and I need to stretch out my legs due to chronic nerve pain in my back that runs down my right leg, in addition to the bursitis in my right hip. Alaska air has the best economy seating in the market. So much room for legs, elbows, etc. When I arrived in SEA, the next Wheelchair was waiting to take me to the next gate. Great communication.

10.0 ExcellentMonica, Feb 2026
EUG - SEA
Read more Alaska Airlines reviews

Wheelchair assistant was on the spot, and very helpful. Gate agent was kind, and made sure I boarded the plane without having to try to hurry with my painful hip. My seat was so comfortable, 20A. I am tall, 5'9 and I need to stretch out my legs due to chronic nerve pain in my back that runs down my right leg, in addition to the bursitis in my right hip. Alaska air has the best economy seating in the market. So much room for legs, elbows, etc. When I arrived in SEA, the next Wheelchair was waiting to take me to the next gate. Great communication.

I had to cancel my trip due to health reasons three days after making the reservation. I was stunned to find out that the ticket was not able to be credited for future travel. $734 loss. Not happy that this was not my experience with Southwest Airlines. I will stick with SW in the future. Boo Alaskan Air and Kayak.

The staff was extremely helpful and accommodating. The only thing I could have done without was the long layover in between flights but I was going to a less popular destination so it was understandable.

All went well, right on time, easy boarding. We ordered the evergreens grain bowl and were surprised and pleased how adequate it was for vegan lunch! Landing was smooth and gate exit was easy

My seat and tray were filthy. Someone’s used straw was in the seat pocket and there were coffee stains and food crumbs on the tray table

On time, good boarding process very quick. Clean planes. Planes are tight, not much leg room ( i am only 5'8"). Some attendants are moving through aisles fiercely and pushing passengers. Got yelled for a tiny man bag that it is an extra personal tem ( size of a wallet) Wi-Fi on the plane does not work well with android phones.

I didn’t go, and can’t use a no refundable ticket.

good food and service and the seats were much better than anything comparable provided by US airlines. The entire experience was light years better than flying with a US company.

On time departure and early arrival giving more than ample time for connecting flight.

Flights were on time, easy boarding, comfort, flight was smooth.... Best travel experience I have ever had

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.

It was delayed but other than that it was great.

Got on the plane and sat there for an hour before departure.

Second flight in a row where the entertainment system is broken. 5 hour long flight with no entertainment and flight attendants did not seem interested in resolving the matter. Very shocked to be treated this poorly considering I paid for a first class experience and have Diamond Medallion status.

They double booked seats, the gate staff changed my ticket as I was boarding she went over to the computer and changed it without telling me. She messed up an entire three row section for me and others. Other travelers were outraged but the gate staff were so rude, so condescending saying it wasn't their problem to solve. I would rate this a zero if I could. Will not fly Delta again I'll stick with United and American.

Comfort seating was on the tight side. Maybe it was a smaller plane(?)

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

This flight was no comparison to our prior flight. I'm thinking it all has to do with the age of the aircraft.

This flight was a first class choice and left much to be desired. Seat backs on seats were falling apart and torn. Seats actually didn't come to a "full & upright position". Pull out table was sprung. Not any significant leg room. All in all we were on an obviously older plane and felt overcharged for what we received as first class.

2 of the seats in row 31 the entertainment system was not working, and one seat the tray table did not go all the way down. Flight arrived early and departed on time which was great.

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.

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

The crew was quite good, they came by often with drinks or to collect trash. But what wasn't nice was the flight was over weigh and several people had to be rebooked. I was questioned whether I should have a seat when I was getting to it. The in-flight entertainment kept buffering and interrupting. And the route took the airplane through high winds which caused us a longer flight

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

Information on your arrival and departure airports