$66 Find Cheap Flights from Washington to Idaho

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Low seasonJanuary
Cheapest flight$66
Best time to beat the crowds with an average 12% drop in price.
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 (181 flights per week), Hawaiian Airlines (180 flights per week), and Delta (93 flights per week).

  • How many airports are there in Idaho?

    There are 6 airports in Idaho. The busiest airport is Boise Airport (BOI), with 79% 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 Boise Air Term. Gowen Fld Airport (BOI), with an average flight price of $147.

  • What is the cheapest day to fly to Idaho?

    Based on KAYAK data, the cheapest day to fly to Idaho is Saturday 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 $294 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 $197 on average. Morning departures are around 1% more expensive than evening flights, on average. The most expensive time of day to fly to Idaho is generally at night, which is peak travel time and where the average cost of a ticket is $222.

  • What is the cheapest flight to Idaho?

    The cheapest ticket to Idaho from Washington found in the last 72 hours was to Boise, at $97 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 $97.

  • 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 7 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 670 direct flights each week.

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

    There are around 111 direct flights from within Washington to Idaho every day. Most flights (39%) depart in the evening.

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

    Each week there are around 772 direct flights from within Washington to Idaho. The most common day for departures is Sunday, with 17% of flights taking off on this day.

  • How long is the flight to Idaho?

    An average nonstop flight from Washington to Idaho takes 3h 35m, 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 772 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 Spokane (39% of total searches to Idaho). The next most popular destinations are Boise (33%) and Jackson (13%). Searches for flights to Idaho Falls (9%), to Hailey (3%) and to Lewiston (1%) 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 11985 reviews
8.1Boarding
8.5Crew
7.0Entertainment
7.8Comfort
7.1Food
Airline reviews

Wonderful as always! Pleasant staff, smooth ride, and timely departure.

10.0 ExcellentAnonymous, Mar 2026
PDX - BOI
Read more Alaska Airlines reviews

Wonderful as always! Pleasant staff, smooth ride, and timely departure.

Plane was clean, staff was professional and flight was on time. No built in tv was still ok, as programs were offered that could synch to smart phones.

J was in the ER x 3...3 protruding discs...contacted Alaska many many days prior to cancel and request a refund or a credjt.. they only gave me 50 % credit....outrageous seeing how i have a doctors letter....just plain inhuman. AI sucks!

The flight was too short. No snacks or drinks offered.

The flight attendant was friendly and attentive. Although our interaction was brief—- it made a difference. The crew was upfront about turbulence. I like the Maui pretzels.

Everything was good. Please have a wheat free option for snacks in the future.

They are always so great! Friendly, on time if not early, organized boarding process. Great price too.

Crew very courteous. Boarding was great. Slow to get baggage at Denver.

Lester and the rest of the crew were such a joy. Also, I want to thank the pilots for getting us there on time, and safely. My first amd only choice will always be Alaska Airlines.

Not delay for a few passengers. That was uncalled for. If idiots can't make the flight on time thats their fault. Why should I be punished for them? No more holding the plane for one or two people

The whole experience was excellent. As it most often is with Delta

Cabin was not pressurized properly. Several passengers had respiratory difficulties.

I was happy that I was able to get a last minute flight but unfortunately my seat was a middle seat. Even with Delta Comfort I wasn't comfortable

There’s not much to say about a one hour flight. This is a connection from LA to RNO that I missed the previous night due to a mechanical check delay on my originating flight from JFK to LAX. The short flight itself was fine. Instructions from the pilot and crew were per usual. The coffee was barely lukewarm, which possibly was purposeful so we would down it quickly. Bags were already on carousel upon reaching baggage claim, which was excellent.

Flight was warm for first few hours and quite rough

Seat was extremely hard which made even a short 1 hour 20 minute flight fairly uncomfortable.

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!

The staff was fine. The plane was extremely tight, and I paid for the wifi and it did not work at all. I was actually going to ask for a refund.

two hour delay and the Delta representative on the PA system was unable to understand

An awesome flight crew. FC seat cushion just doesn’t cut it for a 3+ hour flight.

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.

There was no wifi available at any price -- the plane did not have wifi equipment. Movie choices were blah - hits from the past; nothing recent. The food was blah airplane food. They should have had Mai Tai drinks available as per the Hawaiian Airlines magazine, but they had none onboard.

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.

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.