$61 Find Cheap Flights from Washington to Idaho

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Good to know

Low seasonJanuary
Cheapest flight$61
Best time to beat the crowds with an average 11% drop in price.
Most popular time to fly and prices are also 3% lower on average.
Flight from Seattle to Boise

Flights from Washington to Idaho: the best tips from KAYAK users

Insights shared by verified travelers who flew the route from Washington to Idaho 
AllieFlew with Alaska Airlines
GEG
-
BOI
May 2025
If you can, arrive at airport no sooner than 4 hours before flight.
Verified travelerFlew with Alaska Airlines
SEA
-
BOI
Feb 2024
Keep an eye on boarding time. At SEATAC, if you are not sitting at your exact gate, you cannot hear boarding announcements.

FAQs for booking flights from Washington to Idaho

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

    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 Washington to Idaho.

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

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

    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 Washington to Idaho 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 Washington to Idaho?

    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 Washington to Idaho up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

  • Which airlines fly most frequently to Idaho?

    Washington and Idaho are connected by different airlines. The airlines that fly that route the most regularly are Alaska Airlines (179 flights per week), Hawaiian Airlines (165 flights per week), and Air Tahiti Nui (83 flights per week).

  • How many airports are there in Idaho?

    There are 6 airports in Idaho. The busiest airport is Boise Airport (BOI), with 80% of all flights arriving there.

  • Which is the cheapest airport to fly into in Idaho?

    Prices will differ depending on the departure airport, but generally, the cheapest airport to fly to in Idaho is Hailey Sun Valley-Friedman Airport (SUN), with an average flight price of $128.

  • What is the cheapest day to fly to Idaho?

    Based on KAYAK data, the cheapest day to fly to Idaho is Thursday where round-trip tickets can be as cheap as $197. On the other hand, the most expensive day to fly is Sunday, where round-trip prices are $293 on average.

  • What is the cheapest time of day to fly to Idaho?

    The cheapest time of day to fly to Idaho is generally in the afternoon, when round-trip flights cost $205 on average. Morning departures are around 2% more expensive than evening flights, on average. The most expensive time of day to fly to Idaho is generally in the morning, which is peak travel time and where the average cost of a ticket is $211.

  • What is the cheapest flight to Idaho?

    The cheapest ticket to Idaho from Washington found in the last 72 hours was to Boise, at $79 round-trip. The most popular route is Spokane (GEG) to Boise (BOI) and the cheapest round-trip airline ticket found on this route in the last 72 hours was $79.

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

    The cheapest month for flights from Washington to Idaho is January, when tickets cost $224 (return) on average. On the other hand, the most expensive months are August and July, when the average cost of round-trip tickets is $803 and $776 respectively.

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

    To get a below average price on the flight from Washington to Idaho, you should book around 4 weeks before departure, which saves you about 63% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 22 weeks before departure.

  • How many cities have direct flights to Idaho?

    From Washington, there are direct flights to Idaho from 3 cities. The city with the most direct flights is Seattle, with 662 direct flights each week.

  • How many direct flights to Idaho are there each day?

    There are around 108 direct flights from within Washington to Idaho every day. Most flights (35%) depart in the morning.

  • How many direct flights to Idaho are there each week?

    Each week there are around 752 direct flights from within Washington to Idaho. The most common day for departures is Sunday, with 19% of flights taking off on this day.

  • How long is the flight to Idaho?

    An average nonstop flight from Washington to Idaho takes 4h 08m, covering a distance of 403 miles. The shortest route is Pullman (PUW) to Boise (BOI) with an average flight time of 0h 59m.

  • How many long-haul flights are there to Idaho each week?

    There are not any long-haul (6-12 hour flight duration) or medium-haul (3-6 hour flight duration) flights to Idaho. Instead, there are 752 short-haul flights (up to 3 hour flight duration), with the most arriving from Seattle.

  • What are the most popular destinations in Idaho?

    Based on KAYAK flight searches, the most popular destination is Boise (38% of total searches to Idaho). The next most popular destinations are Spokane (29%) and Jackson (14%). Searches for flights to Idaho Falls (9%), to Hailey (6%) and to Lewiston (2%) are also popular.

Reviews of the top 3 airlines serving from Washington to Idaho

 
Need help choosing which airline to fly with from Washington to Idaho? 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 11658 reviews
7.0Entertainment
8.5Crew
8.1Boarding
7.8Comfort
7.1Food
Airline reviews

I like them since I live in Alaska and I don't have much choice

8.0 ExcellentCarol, Jan 2026
SEA - ANC
Read more Alaska Airlines reviews

I like them since I live in Alaska and I don't have much choice

The flight attendants were nice, but the cabin and seats were uncomfortable.

Alaska Airlines has the best service of airlines I have flown the last couple years. I always choose them first.

Food was terrible, noisy plane & would never pay to fly first class again. Seats in regular price are too small, no leg room & center aisle much too, too small. Seats in 1st class larger but not comfortable.

Overall, once we took off, our flight was good. Flight departure was significantly delayed due to mechanical issues. Upon arrival, it took wayyy too long to retrieve checked bags.

The ticket I purchased through Kayak did not show up in my Alaska Airlines app, and neither of the codes given to me worked for online check in. I've never had to show up to the airport at 6am wondering if I've been scammed. Cheap flight fare or whatever does not play well with airlines and I will be wary of using Kayak in the future.

I know there were a lot of delayed flights, mine from Portland to Eugene was delayed by 3 hours, but not from one employee was there a" we are so sorry about the delay or is there anything we could get you, I thought it was very un-professional and rude.

Crew was rude and passive aggressive when i told them I didnt want to check my duffel bag. Then a crew member slammed my bag to the side when organizing the overhead compartment. The plane had worn leather seats with no infotainment. Plane landing was noticeably rough (this is the one year ive flown multiple times and out of american and delta this was the worst). The only redeeming quality is that we were noticeably earlier than we should have been.

The seats were not very comfortable and there were no TV screens. Boarding was pretty fast because there were so few people on such a small plane and I appreciated that they still gave us our snack and drinks, however I really wish they would come up with a good gluten-free snack.

The plane was delayed which was annoying. No seat back screens is a bummer. Staff if great

Comfort Plus seat 11E seemed smaller than prior flights. The movie selection is good. Watched most of the most recent Tron movie. I'll watch the remaining part later as my movie is saved in the Delta Seatback Experience.

Flight was late from Newark to Atlanta, I asked flight attendant to please let my family of 3 out first when we landed to Atlanta because we were late for our connecting flight to Quito. She didn't and we were late for 5 minutes we couldn't board the plane and spend hours trying to get another flight with customer service for the next day.

I really liked the legroom. I am 6’4”.a at For some reason our seats were not together and using the app to fix it didn’t work. Passengers were nice enough to move for us but you should absolutely ensure a parent sits with their child.

Late delayed flight delays boarding and delays leaving and delays on arrival too. Cramped plane no room no food.

DTW line is too long. The flights from DTW to BWI are always delayed for unknown reasons.

Delta canceled our flight and we had to scramble to find another airline to get home. Phoenix is not a delta hub so they didn’t have another plane. It would have been a red eye though Salt Lake City. Getting in at 5am. No bueno.

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.

A 12 hour flight during the day with one real meal service - are you kidding? Also the breakfast was one of the worst and not what was listed

Flight was delayed several times. At one point, they "pulled back" 15 minutes from the delayed boarding and sent a text saying we would board sooner than previously advised. The flight then was delayed again. And when we boarded, there was an unspecified technical issue which had us waiting in the plane for about an hour.

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

Wasn’t on the flight due to Alaska cancellation…also after all the rerouting, I was going to be on a later flight that left SFO at 7:47pm, which meant an almost 6 hour layover. That same Hawaiian flight was delayed for another 2hours.

I had to cancel the flight because with a 3 hour delay for 'unexpected maintenance' in getting to LAX, I couldn't connect to an overseas flight that I had booked on Scandinavian Air.

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.

Everything you need to know for your flight to Idaho

Cabin class types available on flights to Washington

Cabin classes available on flights to Washington. Prices are the lowest found on KAYAK over the last 7 days. Price and availability is not guaranteed.