$76 Find Cheap Flights from Washington to Idaho

1 adult
1 adult, Economy

KAYAK searches hundreds of travel sites at once for deals on flights to Idaho

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

Save 20% 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.

Useful Info

Good to know

Low seasonApril
High seasonJuly
Cheapest flight$76
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 Lewiston Nez Perce Rgnl Airport (LWS), with an average flight price of $153.

  • 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 $201. On the other hand, the most expensive day to fly is Sunday, where round-trip prices are $287 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 evening, when round-trip flights cost $208 on average. Morning departures are around 8% 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 $227.

  • What is the cheapest flight to Idaho?

    The cheapest ticket to Idaho from Washington found in the last 72 hours was to Boise, at $157 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 $157.

  • 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 05m, covering a distance of 403 miles. The shortest route is Pullman (PUW) to Boise (BOI) with an average flight time of 1h 00m.

  • 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 (27%) and Jackson (12%). Searches for flights to Idaho Falls (12%), to Hailey (5%) and to Pocatello (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 10000 reviews
7.1Entertainment
8.5Crew
7.1Food
7.8Comfort
8.1Boarding
Airline reviews

Seats very comfortable and legroom appreciated. All in all, it was a great experience.

10.0 ExcellentMatt, Jul 2025SEA - ATL
Read more Alaska Airlines reviews

Seats very comfortable and legroom appreciated. All in all, it was a great experience.

Original flight was canceled, and the automatically booked second flight was immediately delayed. I arrived about 4 hours later than planned with only a $12 meal voucher that didn't fully cover a sandwich at airport prices.

I was expecting better service from Alaska Airlines. I registered for assistance since I have a disability. The terminal in Seattle, WA was very unprofessional and at times rude. The BWI location was the exact opposite. I will NOT consider Alaska Airlines for future flights.

It was very good and comfortable, Crew was also great

The flight was delayed almost an hour. No wifi on flight.

Good experience, although it was a little cramped being a tall person. Otherwise everything went smoothly and professionally though

Delay of more than 3 hours I didnt recieve neither a voucher for food Attention disaster

Flight was 1:20 later than booked & I never received notice. At airport way too early. Couldn’t hear announcements on PA system. Crew fine. Retrieving luggage fine. Overall experience not good.

I will never take a red-eye flight again. Crying babies. Complete full flight. Could not get comfortable. Not fun.

Flight was OK, landing not good, boarding was ridiculous. Flight was to load at gate n11 25 minutes before boarding time it was changed to s5 which is 3 tram connections on the other side of the airport, I'm handicapped and even getting a sky cap took 10 minutes needless to say just made it to boarding only because it was delayed. I did learn a valuable lesson don't show up for flight 2 hours early.

My husband upgraded our seats and I don't know if it was due to the type of planet was or if they didn't upgrade our seats. We were supposed to be in I believe comfort seats and they were just as tight as any other seat- no leg room and we are very tall people but at least it wasn't extremely cold. My husband did put in a complaint about our seating because he paid extra and if we would have known that the space and the tightness would have been the same, we just would have gotten the emergency row emergency row seats that we normally get. We love Delta but both our flights coming home we're not good. Oh I forgot to mention that on our flight to Hawaii our luggage wheels got broke and we had to purse new luggage on vacation then we never had this problem so we didn't know protocol and reported it after we got home only for them to tell is we only had 24hrs to report the damage. Not sure what was going on with Delta this vacation trip.

My flight was extremely cold. I had a jacket and a cover was left in each seat. The cover was extremely thin and I have a disability, fibromyalgia and arthrithis and AC air is the worst. I closed my vent and my husbands vent and it still was frigid. I asked the attendant if I could get another cover and she quickly almost dismissively and totally unconcerned stating, (I quote) (one per chair) and walked off so quickly that I didn't get a chance to explain to her that I literally have adisability. I didnt want to make a seen so I set on that flight for over 5 hours in pain, joints locking up and extremely uncomfortable. When my fibromyalgia flares up my joints not only ache but they will lock up also and it takes me days to get back to my regular self even though I take medication for it. I felt like it would not have hurt anyone at all for her to just give me an extra cover because I'm sure they have all types of medical issues in people that fly every day.

After all the weather issues at least they got me to my destination the next day

My flight was canceled after being rescheduled for four days canceling my trip. Kayak and everyone affiliated with it I.e the airlines, and just fly have been excruciating to deal with. My trip to visit family had to be canceled as there was no way to make it. I am furious at all of you.

They delayed our flight because of bad weather in NY which was completely understandable. Then they cancelled our flight and a later flight that evening. The earliest we could fly was the next morning. We ended up buying last minute tickets on another airline and made it home slightly delayed but safely that evening. Delta kept saying it was weather related but if that was the case how did we make it back on another airline? The weather in NY was cloudy but not bad.

From Atlanta to Savannah - flight connection was way to short (we weren't even late landing ) and flight was already boarding when we landed - we were told we were the last on board and so we had to gate check our bags. Once we got on the plane, there were at least seven open bag spots so that was unnecessary delay. There should be better communication between the gate agent and the crew.

Crew was excellent. Comfort seats not as nice as other kinds of planes.

Not a "Delta" issue, but a JFK issue: We booked a connecting flight with 3 1/2 hours between to clearn immigration and customs. Our inbound flight (BCN to JFK) was on the taxiway 45 minutes which ate into our layover time. Immigtration was insanely quick with the CBP MPC app; however, clearing TSA (again, after we were ALREADY cleared in Spain on the inbound international flight) took over 95 minutes. This left us with 10 minutes before boarding the connecting flight (JFK to SAN) to walk to the far end of Terminal 4 and try to find food. We didn't find any food that could promise to serve us in under 10 minutes so we boarded the Delta flight after coming off a plance and an 8-hour flight knowing that we wouldn't be served any food on the next 5 1/2 hour flight. I feel like Delta needs to put pressure on the JFK TSA to open more screening stations (by our count, we saw only 5 scanners open and a line of - as we said - over 90 minutes. The insult is that we WERE ALREADY SCREENED through TSA, but as you come off one flight into the USA, you have to go through the whole process again. It seems like if you have a connecting flight, there should be a way to pass through immigration and customs without needing to return through TSA.

It was a great flight and the stewards and stewardess were all kind and accommodating!! The seats were comfortable and entertainment screen excellent!

There are 4 flights in consecutive gates with about the same departure time. Two flights were boarding at the same time. One was delayed or boarding would be happening at the same time. I am not sure what Delta and LAX need to do to have a better layout at the end of Terminal 2

I was unable to get a check im and get a boarding pass. I tried at the desk of the flight operator Alaska, was told to go to Hawaiian and almost had to go back to Alaskan. In the end inwas told to go thru security and directly to the gate without checking in. It would have been more helpful to have the details rather than walking all over the terminals trying to check in.

Nothing. Fare didn’t allow seat allocations. So we were stuck in the middle . Not good for 77 to 80 year olds. I was stick on plane. Taken off the plane before take off and ground staff told me to google where a hospital was to get a clearance to travel again. Left on own at airport ti fend for our selves. Also was charged for baggage, also I was not aware. I think booking through a third party, such as yourselves, doesn’t allow any for considerations when allocating seats.

I booked on Hawaiian and was bumped to an American airline flight in a different terminal. I was traveling with my two kids and told to take an air train to check my baggage in. We were given the last three seats in front of the toilet. Never flying Hawaiian again. Totally unreliable.

Good except that I couldn’t change seat and made me wait untill I checked in

The middle name gave us so much issue at check in we had done middle names when booking but Hawaiian/Alaska don’t recognize the middle names and gave us problems at check in. We have never experienced that before.

Everything was great except for the delayed flight times (it was delayed twice).

I was booked thru Hawaiian Airlines (HA) on Kayak in February. I got 2 confirmation emails from Hawaiian Airlines in February. Even though the flight ticket informed me the flight was marketed thru HA and operated by Alaska Airlines (AA), I was never given any confirmation codes or anything from Kayak or AA to check into my flight online ahead of time. They also couldn't find the HA flight number I was given on their website and was told my flight did not exist unless I searched thru the AA website for flight details that was similar to the info HA gave me. The only way to check into my flight and make sure the flight still existed required me to get there 4 hours early. When I arrived at the airport, HA desk told me to go to AA desk. First AA desk redirected me to another desk, second AA desk told me to find someone with an iPad, and finally the iPad rep was able to help me. I also had to chat with AA reps online the night previous to my return trip because the same issue occurred.

Traveling with my 90 year old mother, the boarding process was great, the gate crew was very helpful and friendly. One of the flight attendants was kind enough to assist her to and from the restroom mid-flight and cater to any requests she had. I wish I flew Hawaiian Airlines more often, it was a great trip!

I did not board neither one of my flights because It got delayed and I had to be at my destination at a certain time

We were delayed at the SD gate for close to an hour before we were allowed to depart for SJ. Reason given was inadequate ground crew to move the plane from the gate.

Book cheap flights from Washington to Idaho

Recent round-trip flight deals

8/4Mon
nonstopAllegiant Air
1h 36mPDX-IDA
8/11Mon
nonstopAllegiant Air
1h 37mIDA-PDX
$80
7/14Mon
nonstopAllegiant Air
1h 36mPDX-IDA
7/21Mon
nonstopAllegiant Air
1h 37mIDA-PDX
$90
8/16Sat
nonstopHawaiian Airlines
1h 07mGEG-BOI
8/23Sat
nonstopHawaiian Airlines
1h 09mBOI-GEG
$108
8/19Tue
nonstopAlaska Airlines
1h 18mPDX-BOI
8/23Sat
nonstopAlaska Airlines
1h 20mBOI-PDX
$117
8/23Sat
nonstopDelta
1h 35mSEA-BOI
8/26Tue
nonstopDelta
1h 40mBOI-SEA
$117
8/16Sat
nonstopHawaiian Airlines
1h 07mGEG-BOI
8/19Tue
nonstopHawaiian Airlines
1h 08mBOI-GEG
$117
8/23Sat
nonstopAlaska Airlines
1h 08mPDX-GEG
8/24Sun
nonstopAlaska Airlines
1h 12mGEG-PDX
$131
8/16Sat
1 stopDelta
3h 55mGEG-BOI
8/19Tue
1 stopDelta
5h 51mBOI-GEG
$137
8/13Wed
1 stopSouthwest
5h 20mGEG-BOI
8/16Sat
1 stopSouthwest
5h 00mBOI-GEG
$151
8/12Tue
1 stopSouthwest
5h 15mSEA-BOI
8/14Thu
1 stopSouthwest
5h 35mBOI-SEA
$151

Search by stops

Search by airline

Search by price

Recent one-way flight deals

8/21Thu
1 stopSouthwest
6h 40mSEA-BOI
$76
8/7Thu
1 stopSouthwest
4h 30mPDX-BOI
$76
8/23Sat
nonstopDelta
1h 34mSEA-BOI
$79
8/16Sat
1 stopAlaska Airlines
6h 06mPDX-BOI
$88
8/23Sat
1 stopHawaiian Airlines
3h 53mSEA-BOI
$88
8/26Tue
nonstopAlaska Airlines
1h 08mPDX-GEG
$89
10/17Fri
1 stopUnited Airlines
5h 48mSEA-BOI
$89
8/15Fri
1 stopUnited Airlines
5h 53mPDX-BOI
$89
8/26Tue
1 stopDelta
6h 59mSEA-JAC
$98
8/15Fri
nonstopHawaiian Airlines
1h 12mGEG-BOI
$98

Search by stops

Search by airline

Search by price

Last minute flights from Washington to Idaho

Last minute flight, train and bus deals

7/6Sun
nonstopAlaska Airlines
1h 01mSEA-GEG
7/9Wed
nonstopAlaska Airlines
1h 15mGEG-SEA
$317
7/5Sat
multi-stopFrontier
16h 02mPDX-GEG
8/3Sun
multi-stopFrontier
12h 18mGEG-PDX
$341
7/8Tue
nonstopHawaiian Airlines
1h 06mGEG-BOI
7/15Tue
nonstopHawaiian Airlines
1h 08mBOI-GEG
$342
7/7Mon
multi-stopSouthwest
5h 10mPDX-BOI
7/17Thu
multi-stopSouthwest
5h 25mBOI-PDX
$348
7/5Sat
nonstopHawaiian Airlines
1h 10mSEA-GEG
8/1Fri
nonstopHawaiian Airlines
1h 16mGEG-SEA
$357
7/8Tue
nonstopDelta
1h 15mSEA-GEG
7/16Wed
nonstopDelta
1h 16mGEG-SEA
$362
7/8Tue
multi-stopSouthwest
5h 10mGEG-BOI
7/15Tue
multi-stopSouthwest
5h 05mBOI-GEG
$378
7/8Tue
nonstopDelta
1h 13mSEA-GEG
7/12Sat
nonstopDelta
1h 24mGEG-SEA
$387
7/6Sun
nonstop
1h 09mSEA-GEG
7/8Tue
multi-stop
11h 51mGEG-SEA
$434
7/6Sun
multi-stop
5h 05mSEA-GEG
7/8Tue
multi-stop
11h 51mGEG-SEA
$444

Search by stops

Search by airline

Search by price

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.

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