$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 5/29. 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$197
Spokane
Spokane1 stop$333
Pasco
Pasco1 stop$356
Seattle
Seattlenonstop$197
Spokane
Spokane1 stop$333
Pasco
Pasco1 stop$356

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

Fri, Jun 26 - Fri, Jul 3
Allegiant Air Logo
6:39 pm - 7:18 pm
IDA
-
PDX
1h 39mnonstop
Allegiant Air Logo
12:20 pm - 3:00 pm
PDX
-
IDA
1h 40mnonstop
$88Allegiant Air
Mon, Jun 22 - Fri, Jul 10
Allegiant Air Logo
6:39 pm - 7:18 pm
IDA
-
PDX
1h 39mnonstop
Allegiant Air Logo
12:20 pm - 3:00 pm
PDX
-
IDA
1h 40mnonstop
$92Allegiant Air
Mon, May 25 - Mon, Jun 1
Allegiant Air Logo
6:39 pm - 7:20 pm
IDA
-
PDX
1h 41mnonstop
Allegiant Air Logo
3:10 pm - 5:49 pm
PDX
-
IDA
1h 39mnonstop
$94Allegiant Air
Mon, Jun 15 - Fri, Jun 19
Allegiant Air Logo
6:39 pm - 7:18 pm
IDA
-
PDX
1h 39mnonstop
Allegiant Air Logo
3:09 pm - 5:49 pm
PDX
-
IDA
1h 40mnonstop
$98Allegiant Air
Wed, May 27 - Sat, May 30
Alaska Airlines Logo
4:03 pm - 4:50 pm
IDA
-
PDX
1h 47mnonstop
Alaska Airlines Logo
10:30 am - 1:17 pm
PDX
-
IDA
1h 47mnonstop
$117Alaska Airlines
Fri, May 22 - Mon, Jun 8
Multiple Airlines Logo
4:03 pm - 4:50 pm
IDA
-
PDX
1h 47mnonstop
Multiple Airlines Logo
3:09 pm - 5:49 pm
PDX
-
IDA
1h 40mnonstop
$132Multiple Airlines
Thu, May 14 - Sun, May 17
Alaska Airlines Logo
4:03 pm - 4:50 pm
IDA
-
PDX
1h 47mnonstop
Alaska Airlines Logo
10:30 am - 1:17 pm
PDX
-
IDA
1h 47mnonstop
$137Alaska Airlines
Sat, May 9 - Wed, May 13
Delta Logo
6:54 pm - 10:40 pm
IDA
-
PDX
4h 46m
1 stop
Delta Logo
5:45 am - 10:47 am
PDX
-
IDA
4h 02m
1 stop
$157Delta
Tue, May 5 - Wed, May 13
Delta Logo
6:58 pm - 11:53 pm
IDA
-
PDX
5h 55m
1 stop
Delta Logo
5:45 am - 10:47 am
PDX
-
IDA
4h 02m
1 stop
$167Delta
Sun, May 3 - Sun, May 10
Multiple Airlines Logo
5:46 pm - 10:55 am
IDA
-
GEG
18h 09m
1 stop
Multiple Airlines Logo
9:19 pm - 9:31 pm
GEG
-
IDA
23h 12m
2 stops
$371Multiple Airlines
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.

How much is a round-trip flight from Idaho Falls to State of Washington?

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 State of Washington departing in May.

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 $257 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 $257.

What is the cheapest time of day to fly to Washington?

The average price for all round-trip flights from Idaho Falls to Washington depending on the time of departure, clicked by users on KAYAK in the last 2 weeks.

The cheapest time of day to fly to Washington is generally in the evening, when round-trip flights cost $404 on average. Morning departures are around 9% 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 $492.

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 $342, 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 January, when tickets cost $235 (return) on average. On the other hand, the most expensive months are March and November, when the average cost of round-trip tickets is $393 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 Monday, 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 3 weeks before departure, which saves you about 41% 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$84
Best time to beat the crowds with an average 24% drop in price.
Most popular time to fly and prices are also 18% 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.

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 $179 one-way - $140 round-trip; Seattle $254 one-way - $342 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.
7.9
Alaska AirlinesOverall score based on 12193 reviews
7.8Comfort
8.1Boarding
7.0Food
8.5Crew
7.0Entertainment
Airline reviews

Exactly as anticipated. I've always preferred Alaska Airlines over all others.

10.0 ExcellentMichelle, Apr 2026
BNA - SEA
Read more Alaska Airlines reviews

Exactly as anticipated. I've always preferred Alaska Airlines over all others.

Alaska is consistently the best in all categories. Excellent airlines and employees

Were on time, very efficient and pleasant. Families with children were treated well and boarded ahead which made it easier for the rest of the plane.

I truly can’t give a review regarding the food or entertainment it did not apply to my flight. But everything ran very smoothly.

Great. A to B no issues. Everyone did their jobs exceptionally. All great. God bless America.

The response was very helpful and quick. Overall, it was very professional.

No complimentary snacks or food. Had to buy drinks and food.

The last row was empty and I sat there for two minutes. I was treated like a criminal for doing so. My wife wanted to get past the cart in the aisle and she was treated like dirt by the same black attendent..

On time, friendly and professional staff and crew Very nice new terminal in Spokane

My suggestion is that they should provide USB-C charging ports for modern cell phones.

Okay considering we had weather delays which the Pilot notified us of immediately!

Generally on time departures and arrivals, clean planes, sky miles membership provides great benefits (complimentary upgrades, etc).

Flight from Fort Wayne to Atlanta was the smallest in terms of cabin space that I've ever seen. A carry on I've used for 20 years BARELY fit in overhead compartment. I'm 5'10" and felt very cramped. Not the best experience.

I am writing to express my dissatisfaction with the poor service and unprofessional staff we encountered when traveling with an infant. Our flight was delayed, and the gate staff failed to manage the boarding process appropriately. Due to incorrect, unavailable, or missing 'pink tag' stroller and car seat check-in procedures at the gate, we were forced to board last. Furthermore, the gate staff was rude and dismissive, causing significant distress to our infant. To make matters worse, one of our checked items—an infant sleeper/lounger—was returned to us broken. Given the unsafe handling of essential equipment and unprofessional treatment, I expect a prompt resolution regarding compensation for the damaged items.

We departed and landed early which was a nice surprise. The boarding process was slow.

N Everything was perfect from boarding to assistance to baggage in Tampa

Subpar. The seating on the plane is almost unbearable. We are literally touching and/or sitting on each other which is totally unacceptable and shameful. Pilots and crew was very accommodating and friendly.

The boarding was organized and informative but the plane was tight meaning that you were sitting on one another and extremely uncomfortable. It’s disappointing that can’t have common seating comfort on the plane.

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

The checking was disaster, the crew wasn't behave well. It took us two hours to check in, after that thr line at the TSA was long, we barely make the flight. Bad airline

Fabulous if you have a portable wheelchair. They can store it in the galley and you can just walk out with it. Really nice and the flat seats are just incredible, very nice. iPads for movies, also pretty nice,

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.

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

Information on your arrival and departure airports