$149 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 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 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
Travelers love KAYAK
41,299,237 searches in the past 7 days on KAYAK

Save 22% or moreCompare multiple travel sites with one search.

Track pricesNot ready to book? Create a price alert for when prices drop.

Bundle and saveSave money when you bundle your flight + hotel.

Filter your dealsChoose cabin class, free Wi-Fi and more.

Flight Deals
Booking Insights
Flight Deals

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$322
Pasco
Pasco1 stop$302
Seattle
Seattlenonstop$197
Spokane
Spokane1 stop$322
Pasco
Pasco1 stop$302

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

Sat, Oct 11 - Sat, Oct 18
Hawaiian Airlines Logo
6:00 am - 7:11 amIDA-SEA
2h 11mnonstop
Hawaiian Airlines Logo
12:55 pm - 3:38 pmSEA-IDA
1h 43mnonstop
$197Hawaiian 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 - Sun, Dec 28
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
Fri, Nov 14 - Fri, Nov 21
 Logo
10:56 pm - 11:56 amIDA-PDX
38h 00m2 stops
 Logo
1:54 pm - 4:32 pmPDX-IDA
1h 38mnonstop
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
Fri, Jan 2 - Mon, Jan 5
Allegiant Air Logo
1:26 pm - 2:11 pmIDA-PDX
1h 45mnonstop
Allegiant Air Logo
10:01 am - 12:36 pmPDX-IDA
1h 35mnonstop
$243Allegiant Air
Find Deal
Sun, Oct 5 - Sat, Oct 11
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
Mon, Nov 24 - Sat, Nov 29
Allegiant Air Logo
5:22 pm - 6:07 pmIDA-PDX
1h 45mnonstop
Allegiant Air Logo
9:59 am - 12:37 pmPDX-IDA
1h 38mnonstop
$310Allegiant Air
Find Deal
Wed, Nov 5 - Wed, Nov 12
American Airlines Logo
7:10 am - 2:08 pmIDA-SEA
7h 58m1 stop
American Airlines Logo
6:30 am - 10:34 pmSEA-IDA
15h 04m1 stop
$385American Airlines
Find Deal
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 $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.

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 $267, 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 April, 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 $373 and $368 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 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.

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 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 seasonJanuary
Cheapest flight$149
Best time to beat the crowds with an average 9% drop in price.
Most popular time to fly with an average 8% increase in price.
Flight from Idaho Falls to Seattle

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 at night, when round-trip flights cost $240 on average. Morning departures are around 12% more expensive than evening flights, on average. The most expensive time of day to fly to Washington is generally in the morning, which is peak travel time and where the average cost of a ticket is $468.

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: Seattle $200 one-way - $379 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 10000 reviews
7.8Comfort
8.5Crew
7.0Entertainment
7.1Food
8.1Boarding
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.

Flight attendant was awful, I felt second hand embarrassment with every one of her interactions with people onboard. She was so incredibly rude every chance she got

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.

Great flight - efficient and cheerful team on board, at SFO gate. Also, PAE (Paine Field, Everett, WA) is a great little airport to fly out or in to!

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

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 Washington

Information on your arrival and departure airports

Not what you’re looking for? Find thousands of other hotels, flights, car rentals and package deals with KAYAK.