$67 Find Cheap Flights from Idaho to Washington

1 adult

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

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.

Useful Info
Useful Info

Good to know

Low seasonFebruary
High seasonJuly
Cheapest flight$67
Best time to beat the crowds with an average 8% drop in price.
Most popular time to fly with an average 10% increase in price.
Flight from Spokane to Seattle

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

Insights shared by verified travelers who flew the route from Idaho to Washington 
KrisFlew with Alaska AirlinesIDA-SEAOct 2024
I have had better experiences with Delta and United. I paid a FORTUNE for my ticket to on Alaska, and I would have expected better service.
RodneyFlew with Alaska AirlinesBOI-SEAMay 2024
Boarding seem to go well , the crew was good, friendly and helpful. Went smooth.

FAQs for booking flights from Idaho to Washington

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

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

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

    Prices will differ depending on the departure airport, but generally, the cheapest airport to fly to in Washington is Spokane Airport (GEG), with an average flight price of $138.

  • What is the cheapest day to fly to Washington?

    Based on KAYAK data, the cheapest day to fly to Washington is Friday where round-trip tickets can be as cheap as $446. On the other hand, the most expensive day to fly is Saturday, where round-trip prices are $539 on average.

  • 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 $449 on average. On average, there is no price difference when choosing to fly in the morning or the evening on this flight route. The most expensive time of day to fly to Washington is generally in the afternoon, which is peak travel time and where the average cost of a ticket is $505.

  • What is the cheapest flight to Washington?

    The cheapest ticket to Washington from Idaho found in the last 72 hours was to Spokane, at $137 round-trip. The most popular route is Boise (BOI) to Seattle (SEA) and the cheapest round-trip airline ticket found on this route in the last 72 hours was $150.

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

    The cheapest month for flights from Idaho to Washington is June, when tickets cost $296 (return) on average. On the other hand, the most expensive months are September and December, when the average cost of round-trip tickets is $626 and $578 respectively.

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

    To get a below average price on the flight from Idaho to Washington, you should book around 4 weeks before departure. For the absolute cheapest price, our data suggests you should book 9 weeks before departure.

  • How long is the flight to Washington?

    An average nonstop flight from Idaho to Washington takes 3h 18m, covering a distance of 374 miles. The shortest route is Boise (BOI) to Pullman (PUW) with an average flight time of 0h 56m.

  • What are the most popular destinations in Washington?

    Based on KAYAK flight searches, the most popular destination is Seattle (71% of total searches to Washington). The next most popular destinations are Portland (17%) and Spokane (10%). Searches for flights to Pullman (2%) and to Pasco (0%) are also popular.

Top 4 airlines serving from Idaho to Washington

Need help choosing which airline to fly with from Idaho 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 9972 reviews
7.1Food
7.9Comfort
8.1Boarding
7.1Entertainment
8.5Crew
Airline reviews

Booked a premium seats weeks ago and got an email the night before that id instead be seated in the cabin. Only reason I booked this overnight flight was for the better seating. All they are doing to compensate is giving a $29 coupon to use on another flight. I won’t be booking this airline again.

4.0 OkayAnonymous, Apr 2025EWR - SEA
Read more Alaska Airlines reviews

Booked a premium seats weeks ago and got an email the night before that id instead be seated in the cabin. Only reason I booked this overnight flight was for the better seating. All they are doing to compensate is giving a $29 coupon to use on another flight. I won’t be booking this airline again.

It was all great all around. Will travel with Alaska next trip.

There was no seating at the gate, no where to charge your devices, super crowded. Boarding in group F meant all luggage space was taken when it was time for me to board. The boarding crew was short with everyone and seemed irritated. The luggage space was insufficient, the seat was too small for me (6'4") and very uncomfortable trip. I was in a middle seat between a person snoring the whole trip and a person with very strong body odor. The flight crew was terse and unfriendly, seemed irritated and impatient. Yelled a lot at people with earbuds in, understandable. Finally, we arrived 10 minutes early, only to sit on the tarmac for 20 minutes and wait for a gate. Worst flight experience I've had in years.

Flight 351 SEA to BOI was terrible. We got to cruising altitude and I needed to use the restroom but the fasten seatbelt sign never came off. There was no turbulence and I'd felt the plane level off so I stood up to use the restroom about 15 minutes after we leveled off. The stewardess went over the intercom and said I needed to be seated because the captain hadn't turned off the fasten seatbelt sign....Which... Fair.... But not five minutes later she went and used the bathroom. Felt very unprofessional to leave a paying customer with a burning urethra for the entire flight and bark at them to sit down and still use the bathroom yourself. They never did turn off the seatbelt sign.

For longer trips, snacks are puny, boring and don’t have ANY nutritional value.

Upgraded to first class both times .The flight attendant Spicy Tim.was excellent and very amusing.

Close boarding too early we’re willing to not let people on flight that could not check in. What ever happened to customer service? Three of us had to fight to get on plane shameful

Check your emails that you sent me. 9 emails were sent telling me that my flight is Delayed. Each one with a different time 7:10, 7:55, 9:31, 9:09, 9:29, 9:44, 10:00, 9:49, and 10:10. That was how my experience went.

Made us check our carry on,even though there was plenty of room because they didn't check with the flight crew. Also boarding was 40min late, due to the plane being on the wrong side of the airport. Also their app didn't record my tsa precheck

The flight was delayed due to a safety check. Why couldn't that have been done ahead of time? We got to Seattle with enough time to make our connecting flight but they kept changing the gate so we missed it. There were at least ten of us who missed the flight. The airline was aware. They could have waited. They didn't. Our new flight was not for seven hours and then was delayed another two hours. We got the last seats which don't recline. Super uncomfortable after a long day spent at the worst airport. Did they offer us a meal voucher or anything? On top of that Alaska Airlines didn't complete my ticket to the new flight. I wasn't sure I would get on this horrible flight, either. Oh, and it's ten o'clock at night....no food. Is this how Alaska Airlines treats its customers? I'll never fly with this airline again.

Flight was delayed due to weather. Crew did a nice job of making us comfortable. No complain complaints.

Delta is my preferred airline. I've traveled with them for years. On time in most cases, good communication, easy to use app. Most planes are pretty nice. I was on a CRJ 700/900 however, which was pretty badly aged inside and needed a refresh. No infotainment, unreliable wifi, best to download before boarding or bring a book. Food choices are really just snacks on this flight, nice variety but about what you'd expect. Great staff and prompt in departure and early arrival too. Overall quite satisfied.

Crew was friendly Love the entertainment in the seat head rest.

Delta flight was on time, seats were comfortable, and crew was nice.

This had nothing to do with Delta… The flights were on time and flawless. The service was excellent. We purchased seats in (aisle/middle) comfort plus since this was a cross country flight. Unfortunately, the woman seated at the window was 300+ pounds and, as might be expected, covered up about a third of the middle seat also. there was absolutely nothing that Delta could have done about that… I just don’t know what the answer should be. If you purchase a seat, you should should be able to use the entire seat and not just the portion that someone else is not sitting/oozing in. Disappointing…there should be something that could be done….I'm just not sure what solution could be.

Delayed take-off. Very small plane so very scary with lots of bumps during the flight. Would never fly Delta on short flights in small 80 seaters plane again! Felt relieved when landed.

The worst part was I was NOT allowed in the lounge even though I was holding a first class ticket and have a premium American Express card. I have flown Business or First Class with many airlines. Delta is the ONLY one who does not extend this courtesy to anyone except people who hold the very expensive American Express card. As a result, I won’t fly Delta if I have any other choice.

A little bumpy ride . No food was being provided due the the turbulence. That was ok it was a short flight to my standards.

Simply outstanding. Their new lounge for Delta One customers is a cut above the rest.

The Dekta Rep that checked us in was great. She's very personable, pleasant, and can tell she enjoys her job.

The departure gate was changed from C1 to B18 but it was never announced at the C1 gate nor did I receive any email or text message or phone call about the gate change. I was in a window seat. In the other two seats next to me were Mr. Rotund and Ms. Rotunda, a youngish couple. Just the two of them should have booked three seats. I was smashed up against the wall and window for five hours. Overall, I'd say my flight sucked. Wouldn't you?

I couldn't get checked in 24 hours before either leg of my flight. I tried both my Alaska and Hawaiian codes on both apps.

We moved from the international terminal to a new location. I think there are still some bugs to work out . We didn’t receive check in notification and had to scramble to find it but i think it will work out

I'm was impressed with their service. Everything was great

All in All a great experience. Cost of luggage sucks … first time I ever had to pay for luggage. Otherwise the check in counter was awesome, the gate clerks were great and the Stewards & Esses were the best.

As my daughter was boarding the flight they pulled her from the line and told her, after she had checked in and checked a bag, that she could not board the flight due to a fraud flag on the debit card used for the ticket purchase. The personnel would not allow me to speak to them, saying I had to take it up with customer service that was not present. They tried to get my daughter to purchase another ticket on the spot or get out. The customer service personnel were insistant that the personnel at the gate be on the phone which they would not allow. Would not accept payment from three different accounts and did not resolve the issue. Many conflicting reports about the source of the problem, the fraud department is uncontactable. The only good thing to come of it was checked bag arrived. Our family will not be using Hawaiian Airlines. Ever.

Great staffing. Terrible food. Please do cold sandwiches or salads. the "hot pickets" are terrible.

Love Hawaiian you can’t go wrong, still provides you good drinks and little snack at the end

No tv’s. Had to walk 45 minutes to connect to next flight. Couldn’t get dinner as a result. Ended up eating pretzels until I felt sick.

Not so good. The takeoff was aborted after reaching 100 knots due to a problem with the front tires. I do commend the pilot for a quick decision and preventing a potential disaster. We returned to the gate to put fresh tires on the front. Our flight was delayed for over 3 hours. The rest of the flight was okay. We were reimbursed by Hawaiian Airlines for only $50. Not too generous

I mean, it’s Spirit. But it was frustrating to have our flight canceled, get bumped to a later flight, and then Spirit was unwilling to check our bag until 4 hours before our flight… tell us we could not sit in the waiting area’s chairs… and really negative experience getting checked in and dropping the bag.

Not having it be changed after we bought the flight tickets from a direct flight getting in at a reasonable time to a connecting flight red eye of 9 hours, so that we would lose our 35 dollars in nonrefundable insurance would've been great! Our country really does need low-cost carrier options, but this type of "service" ain't it. Fortunately, had a little better success with them flying to and from San Juan PR last month at least.

All was good expecting the seats need a bit of cushion. Besides that I can’t complain.

You get what you pay for, and the flights went smoothly. There’s no reclining chairs, no screens, And there isn’t always wifi, but the plane was clean and staff was friendly and the takeoff/landing were smooth.

The only positive is that the flight made it both ways. Getting charged for every little thing after the cost of the ticket itself is comical, considering how the plane and services are as bottom-tier as possible. The self check-in kiosks are useless. It’s nice to think that you can print your boarding pass, tag your checked bag, and then just drop it off. But no, they still make you go through the line once you finish- what’s the point of the self check-in then? Any questions for the staff seem like the biggest inconvenience and were met with condescending responses. This was my first and now last time ever flying with Spirit. After all the extra costs, subpar plane and staff, I see no value. I’d rather drive the 13 hours than give Spirit another dime.

The flight was fine however what started as a reasonable priced ticket could have become an overpriced ticket with additional charge for carry on as well as checked bag $79 per bag per person each way. Additional charge for choosing one’s seat, additional charge for beverage and snack, we were on what was described as a new plane yet there were no audio/visual on the jet. A bare bones service but not at a bare bones price. Will think twice before flying Spirit again. 😕

Flight was delayed a bit, but that was expected (and updated), so really not bad at all for the price. Could’ve used one less email asking me to upgrade my seat; otherwise no significant complaints

I love Spirit. New aircraft, great cabin service, the airfares are low cost which helps me visit my hospitalized daughter anytime I can without paying a fortune.

Flight was 2hours late they had no crew or the pilot.

I paid for streaming wifi and the connection was poor.

Book cheap flights from Idaho to Washington

Recent round-trip flight deals

5/16Fri
nonstopAllegiant Air
1h 39mIDA-PDX
5/19Mon
nonstopAllegiant Air
1h 39mPDX-IDA
$107
6/4Wed
nonstopAlaska Airlines
1h 11mGEG-SEA
6/4Wed
nonstopAlaska Airlines
0h 59mSEA-GEG
$131
5/28Wed
nonstopDelta
1h 36mBOI-SEA
6/10Tue
nonstopDelta
1h 33mSEA-BOI
$137
5/30Fri
nonstopDelta
1h 21mGEG-SEA
6/2Mon
nonstopDelta
1h 18mSEA-GEG
$137
5/30Fri
1 stop
12h 54mBOI-SEA
6/6Fri
nonstop
1h 29mSEA-BOI
$143
5/30Fri
1 stop
12h 54mBOI-SEA
6/1Sun
nonstop
1h 27mSEA-BOI
$153
6/14Sat
nonstopHawaiian Airlines
1h 36mBOI-SEA
6/21Sat
nonstopHawaiian Airlines
1h 28mSEA-BOI
$166
6/6Fri
nonstopHawaiian Airlines
1h 12mGEG-PDX
6/7Sat
nonstopHawaiian Airlines
1h 02mPDX-GEG
$171
5/30Fri
1 stopSpirit Airlines
12h 54mBOI-SEA
6/1Sun
1 stopSpirit Airlines
19h 01mSEA-BOI
$173
5/30Fri
1 stopSpirit Airlines
12h 54mBOI-SEA
6/1Sun
1 stopSpirit Airlines
19h 01mSEA-BOI
$192

Search by stops

Search by airline

Search by price

Recent one-way flight deals

5/27Tue
nonstopHawaiian Airlines
1h 08mGEG-SEA
$67
5/23Fri
nonstopAlaska Airlines
1h 09mGEG-SEA
$68
5/31Sat
nonstopDelta
1h 48mBOI-SEA
$69
5/28Wed
nonstopDelta
1h 19mGEG-SEA
$69
5/28Wed
1 stopSouthwest
4h 10mBOI-PDX
$79
6/7Sat
1 stopSouthwest
4h 25mBOI-GEG
$79
5/18Sun
nonstopAlaska Airlines
1h 10mGEG-SEA
$81
5/24Sat
1 stopHawaiian Airlines
2h 52mGEG-PDX
$93
7/4Fri
1 stopSpirit Airlines
6h 27mBOI-SEA
$105
5/9Fri
1 stopSpirit Airlines
12h 54mBOI-SEA
$155

Search by stops

Search by airline

Search by price

Last minute flights from Idaho to Washington

Last minute flight, train and bus deals

5/3Sat
nonstopAlaska Airlines
1h 06mGEG-SEA
5/17Sat
nonstopAlaska Airlines
1h 02mSEA-GEG
$377
5/2Fri
nonstopAlaska Airlines
0h 56mBOI-PUW
5/6Tue
multi-stopAlaska Airlines
3h 59mPUW-BOI
$378
5/3Sat
multi-stopAlaska Airlines
5h 42mGEG-SEA
5/3Sat
nonstopAlaska Airlines
1h 03mSEA-GEG
$385
5/4Sun
multi-stopSouthwest
4h 55mBOI-PDX
5/7Wed
multi-stopSouthwest
5h 00mPDX-BOI
$427
5/5Mon
nonstopHawaiian Airlines
1h 05mGEG-SEA
5/12Mon
nonstopHawaiian Airlines
1h 05mSEA-GEG
$432
5/4Sun
multi-stopSouthwest
4h 35mBOI-PDX
5/7Wed
multi-stopSouthwest
9h 15mPDX-BOI
$432
5/4Sun
multi-stopDelta
6h 52mBOI-GEG
5/12Mon
multi-stopDelta
5h 51mGEG-BOI
$458
5/2Fri
multi-stopDelta
5h 04mBOI-GEG
5/15Thu
multi-stopDelta
5h 59mGEG-BOI
$463
5/3Sat
nonstopHawaiian Airlines
1h 06mGEG-SEA
5/3Sat
nonstopHawaiian Airlines
1h 06mSEA-GEG
$471
5/2Fri
multi-stopSpirit Airlines
6h 59mBOI-SEA
5/4Sun
multi-stopSpirit Airlines
15h 01mSEA-BOI
$535

Search by stops

Search by airline

Search by price

Everything you need to know for your flight to Washington

Cabin class types available on flights to Idaho

Cabin classes available on flights to Idaho. 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.