$69 Find Cheap Flights from Washington to Idaho

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Low seasonApril
High seasonJuly
Cheapest flight$69
Best time to beat the crowds with an average 9% drop in price.
Most popular time to fly and prices are also 1% 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 AirlinesGEG-BOIMay 2025
If you can, arrive at airport no sooner than 4 hours before flight.
Verified travelerFlew with Alaska AirlinesSEA-BOIFeb 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 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 $169.

  • 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 $203. On the other hand, the most expensive day to fly is Sunday, where round-trip prices are $280 on average.

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

    The cheapest time of day to fly to Idaho is generally at night, when round-trip flights cost $208 on average. Morning departures are around 5% more expensive than evening flights, on average. The most expensive time of day to fly to Idaho is generally in the afternoon, which is peak travel time and where the average cost of a ticket is $261.

  • What is the cheapest flight to Idaho?

    The cheapest ticket to Idaho from Washington found in the last 72 hours was to Boise, at $147 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 $147.

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

    The cheapest month for flights from Washington to Idaho is February, when tickets cost $258 (return) on average. On the other hand, the most expensive months are March and July, when the average cost of round-trip tickets is $1,146 and $864 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. For the absolute cheapest price, our data suggests you should book 23 weeks before departure.

  • How long is the flight to Idaho?

    An average nonstop flight from Washington to Idaho takes 4h 19m, covering a distance of 403 miles. The shortest route is Seattle (SEA) to Spokane (GEG) with an average flight time of 1h 01m.

  • What are the most popular destinations in Idaho?

    Based on KAYAK flight searches, the most popular destination is Boise (40% of total searches to Idaho). The next most popular destinations are Spokane (24%) and Jackson (14%). Searches for flights to Idaho Falls (11%), to Hailey (5%) and to Lewiston (2%) are also popular.

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 10000 reviews
7.1Entertainment
8.5Crew
7.8Comfort
8.1Boarding
7.1Food
Airline reviews

We had to take the train to our next gate but had time to eat a meal. When to our next gate and asked employee about gate and got informed that gate had been changed so back on train to next gate. So thankful she was there and informed us of gate change. Because of the issue the boarding was slow but employees were there and busy helping all and keeping it organized.

10.0 ExcellentHelen, Jun 2025SEA - MCI
Read more Alaska Airlines reviews

We had to take the train to our next gate but had time to eat a meal. When to our next gate and asked employee about gate and got informed that gate had been changed so back on train to next gate. So thankful she was there and informed us of gate change. Because of the issue the boarding was slow but employees were there and busy helping all and keeping it organized.

The crew the employees were friendly and excellent. There was a problem with the plane and they had workers there immediately working on it. They made sure the people that had immediate connects knew what gates they had to get to and had them leave the plane first. Very thoughtful.

Very pleasant and the flight felt like it went by quick

All flight entertainment is from your own device and there was an $8 charge to connect. also 1 drink and a small bag of pretzels was all that was given to us. other that that the seats were good and the flight itself was as expected.

It is very bad they do not give you money back

They lost our bag and it took them days to find it. Terrible communication and lots of lies about where it was. Their system hasn’t merged with Hawaiian yet they route people on shared flights with Hawaiian, creating an administrative nightmare.

Flight was about 30 minutes delayed. All staff were friendly and professional while keeping us updated.

Major flight delays, it was a 1.5-hour delay. The gate kept changing about 3 times in Seattle. very hectic and chaotic.

More leg room in back seats. Can you require people to smell good on planes? ha ha Staff was great! Plane was comfortable. I enjoyed the movies and TV. Smooth take off and landing.

The only problem was the time delay. Kudos to the counter agent in Seattle. Very helpful and gracious.

Great service. Flight was delayed while we sat on the runway for a couple of hours. Weather related. Staff made is very bearable. The steward servicing the first class cabin was exceptional. Thank you! 💗

5 hours of delay that could've been much shorter if Delta had taken the 1 hour delay they imposed on the flight before boarding to run any of the plane checks required for flight to find the hydraulic issue that required nearly 3 hours to fix. $24 of meal credit buys a sandwich and a soft drink. Poor communication within the terminal about what gate we'd be re-boarding from and when we'd be re-boarding.

Amazing flight! I have never noticed the uniforms of the attendants before in twenty years of flying except today when one female had the most amazing dress on. It was beautifully designed and showed she was in charge. I never dreamed I would google who designed Delta uniforms . The ultimate compliment is when another woman admires your outfit. . I hope your designer puts it on the market

It would be nice if was given wires ear buds. Overall was a good experience was able to sleep on the plane

My flight was 6 pm 6/6. Every hour they delayed it again - air condition issues then no pilot then the crew had worked too many hours and cancelled the flight at 11 pm. Sent customers to NJ a 45 minutes uber ride to a hotel. Had to be back by 5 am for a 7 am flight and again no pilot etc with another three hours of delays.

The entertainment and wifi mostly didn't work on this flight.

Terrible entertainment system - kept freezing and audio kept cutting out. Snacks were mediocre at best for a 5 hour flight.

The check in and bag drop off for Sky Priority members is slow. The Clear security was also slow - a TSA issue.

I am still upset that my bag was lost on a recent trip to Rome ; we were inconvenienced and out €150 Euros ; delta has refused to reimburse us

I am very bothered by the events today. I can't believe the flight attendants allowed someone to take my seat and made me move. It was embarrassing. I was in the right. The lady just didn't want move. I can't believe delta would allow this to stand and disrespect my rights as a passenger. The lady complained about her leg and that she couldn't move. Firstly somehow she was able to make it to row 24. Not sure how much her leg could have hurt. Secondly, I'm in plenty of pain myself. I just finished chemotherapy a several weeks ago. My body is constantly sore. Yet deltas flight attendants didn't appropriately protect my rights. In the end they found me a seat on the plane but I want to understand how delta can operate this way. They in essence allowed a bully to get their way.

Very nice experience. The boarding however seemed somewhat mixed up, and we were delayed taking off.

Flight was canceled with no voucher of any kind and next available flight was two days later.

Boarding was chaotic. Microphone not working properly and second agent was distracted from task with baggage and late arrivals.

I DID NOT GO TO HAWAII ON HAWAIIAN AIRLINES. YOU DID NOT INFORM ME THAT BY CHOOSING BASIC ECONOMY, I MIGHT BE REQUIRED TO FLY STANDBY. I AM ELDERLY AS WAS MY COMPANION WHO IS ALSO SEVERELY DISABLED AND THERE WOULD BE NO WAY WE COULD TRAVEL ON STANDBY. THEY TOLD ME THAT ALL OF THE BASIC ECONOMY SEATS HAD BEEN SELECTED BY OTHER PASSENGERS AND WE HAD TO PAY AN ADDITIONAL $942 TO GET A SECURED SEAT ON THE PLAN AND, IN SPITE OF THE ADDITIONAL COST, WE WERE NOT ALLOW US TO AMEND OUR TRAVEL PLANS TO EXTEND OUR VACATION. ULTIMATELY, THE FLIGHT WAS DELAYED. WE WERE OFFERED A REFUND IF WE CANCELED OUR TRIP ALTOGETHER WHICH WE DID. IT IS YOUR DUTY TO INFORM YOUR CUSTOMERS OF THE POTENTIAL PROBLEMS THEY MAY FACE, AND YOU DID NOT DO SO. I WILL NOT UTILIZE YOUR SERVICES EVER AGAIN.

It was very pleasant. The staff and crew are very polite.

On time. Alaska upgraded seat comfort with memory foam seat covers with head rests

the people at the counter, NEED TO BE MORE HELPFUL. we had three suitcases to check in and we were not trying to be an INCONVENIENCE TO YOUR clerks. but she was not helpful and made our trip back home memorable but not IN A GOOD WAY. Sadly to say, you guys need to teach to be and to go above and beyond to help THE CUSTOMER BY ANY MEANS POSSIBLE. they need to leave aside whatever they are going thru in their lives, THEIR WORK DEMANDS THAT OF THEM, IF NOT THEY ARE NOT IN THE JOB THEY SUPPOSED TO.

Because the airport is under construction and because Hawaiian air just changed terminals we missed boarding out flight by 5 minutes. That cost me a night in an airport hotel and several hours of rebooking to make it to my destination. Costumers need to know that airport construction is a problem and they need to add an hour to deal with the air train delays from Federal Circle.

Half of my family members didn’t make it because they involuntary bumped off . And their seats where given away

Hawaiian Airlines staff is always professional & quick & easy check in & boarding process

Book cheap flights from Washington to Idaho

Recent round-trip flight deals

7/21Mon
nonstopAllegiant Air
1h 36mPDX-IDA
7/28Mon
nonstopAllegiant Air
1h 37mIDA-PDX
$103
7/18Fri
nonstopAllegiant Air
1h 36mPDX-IDA
7/28Mon
nonstopAllegiant Air
1h 37mIDA-PDX
$109
11/8Sat
nonstopAlaska Airlines
1h 14mPDX-GEG
11/11Tue
nonstopAlaska Airlines
1h 17mGEG-PDX
$137
9/16Tue
nonstopAlaska Airlines
1h 19mPDX-BOI
9/23Tue
nonstopAlaska Airlines
1h 22mBOI-PDX
$137
8/19Tue
nonstopDelta
1h 30mSEA-BOI
10/21Tue
nonstopDelta
1h 51mBOI-SEA
$137
10/15Wed
nonstopDelta
1h 09mSEA-GEG
10/15Wed
nonstopDelta
1h 25mGEG-SEA
$137
8/20Wed
1 stopHawaiian Airlines
6h 07mSEA-BOI
10/22Wed
1 stopHawaiian Airlines
4h 05mBOI-SEA
$156
8/15Fri
nonstopHawaiian Airlines
1h 07mGEG-BOI
8/17Sun
nonstopHawaiian Airlines
1h 11mBOI-GEG
$157
11/12Wed
1 stopSouthwest
4h 20mPDX-BOI
11/12Wed
2 stopsSouthwest
7h 30mBOI-PDX
$162
8/20Wed
1 stopSouthwest
4h 55mSEA-BOI
10/22Wed
2 stopsSouthwest
10h 45mBOI-SEA
$168

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Recent one-way flight deals

11/4Tue
nonstopDelta
1h 32mSEA-BOI
$69
8/20Wed
nonstopDelta
1h 09mSEA-GEG
$69
6/20Fri
nonstopAllegiant Air
1h 36mPDX-IDA
$73
6/20Fri
nonstopAllegiant Air
1h 36mPDX-IDA
$78
8/18Mon
1 stopAlaska Airlines
4h 03mSEA-BOI
$88
8/31Sun
1 stopHawaiian Airlines
3h 48mSEA-GEG
$88
10/4Sat
nonstopAlaska Airlines
1h 05mPDX-GEG
$89
11/4Tue
1 stopUnited Airlines
5h 44mSEA-BOI
$89
8/1Fri
nonstopHawaiian Airlines
1h 33mSEA-BOI
$92
7/18Fri
1 stopUnited Airlines
5h 53mPDX-BOI
$120

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Last minute flights from Washington to Idaho

Last minute flight, train and bus deals

6/13Fri
nonstopAllegiant Air
1h 36mPDX-IDA
6/16Mon
nonstopAllegiant Air
1h 37mIDA-PDX
$160
6/17Tue
nonstopAlaska Airlines
1h 18mPDX-BOI
7/8Tue
nonstopAlaska Airlines
1h 21mBOI-PDX
$323
6/14Sat
multi-stopSouthwest
8h 20mPDX-BOI
8/23Sat
multi-stopSouthwest
6h 55mBOI-PDX
$332
6/14Sat
multi-stopSouthwest
8h 20mPDX-BOI
7/12Sat
multi-stopSouthwest
8h 00mBOI-PDX
$353
6/17Tue
multi-stopHawaiian Airlines
4h 29mPDX-GEG
6/24Tue
multi-stopHawaiian Airlines
3h 47mGEG-PDX
$361
6/15Sun
nonstopDelta
1h 17mSEA-GEG
6/22Sun
nonstopDelta
1h 25mGEG-SEA
$432
6/13Fri
nonstop
1h 18mPDX-BOI
6/15Sun
multi-stop
12h 43mBOI-PDX
$443
6/13Fri
multi-stop
4h 11mPDX-BOI
6/15Sun
multi-stop
12h 43mBOI-PDX
$454
6/16Mon
multi-stopDelta
4h 00mGEG-BOI
6/18Wed
multi-stopDelta
7h 06mBOI-GEG
$457
6/15Sun
multi-stopHawaiian Airlines
3h 57mSEA-BOI
6/21Sat
multi-stopHawaiian Airlines
5h 10mBOI-SEA
$486

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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.

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