$56 Find Cheap Flights from Idaho to Washington

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Low seasonFebruary
High seasonJuly
Cheapest flight$56
Best time to beat the crowds with an average 8% drop in price.
Most popular time to fly with an average 5% increase in price.
Flight from Idaho Falls to Portland

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 Seattle/Tacoma Intl Airport (SEA), with an average flight price of $232.

  • What is the cheapest day to fly to Washington?

    Based on KAYAK data, the cheapest day to fly to Washington is Thursday where round-trip tickets can be as cheap as $420. On the other hand, the most expensive day to fly is Sunday, where round-trip prices are $516 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 $395 on average. Morning departures are around 2% more expensive than evening flights, on average. The most expensive time of day to fly to Washington is generally in the morning, which is peak travel time and where the average cost of a ticket is $476.

  • What is the cheapest flight to Washington?

    The cheapest ticket to Washington from Idaho found in the last 72 hours was to Seattle, at $140 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 $140.

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

    The cheapest month for flights from Idaho to Washington is September, when tickets cost $176 (return) on average. On the other hand, the most expensive months are June and November, when the average cost of round-trip tickets is $227 and $227 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 4 weeks before departure.

  • How long is the flight to Washington?

    An average nonstop flight from Idaho to Washington takes 3h 58m, covering a distance of 374 miles. The shortest route is Spokane (GEG) to Portland (PDX) with an average flight time of 1h 06m.

  • What are the most popular destinations in Washington?

    Based on KAYAK flight searches, the most popular destination is Seattle (76% of total searches to Washington). The next most popular destinations are Portland (19%) and Spokane (4%). Searches for flights to Pasco (0%) and to Pullman (0%) are also popular.

Top 3 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 10000 reviews
7.1Food
8.5Crew
7.1Entertainment
8.1Boarding
7.8Comfort
Airline reviews

Both flights were delayed due to an incident at SEA. The problem really rests with inadequate customer & plane facilities for Skywest at SEA. You feel like you are in a cattle enclosure. And planes were sitting on taxiways waiting for parking so every plane was late. SEA appears to be over capacity. It is not a fun passenger experience waiting. But crews and flights were all fine. Alaska needs to step up.

8.0 ExcellentAnonymous, Jun 2025TUS - SEA
Read more Alaska Airlines reviews

Both flights were delayed due to an incident at SEA. The problem really rests with inadequate customer & plane facilities for Skywest at SEA. You feel like you are in a cattle enclosure. And planes were sitting on taxiways waiting for parking so every plane was late. SEA appears to be over capacity. It is not a fun passenger experience waiting. But crews and flights were all fine. Alaska needs to step up.

Staff are helpful and patient. I don’t appreciate the almost 5 hours delay and also the delay of our luggage and being switched from one carousel to another to pick them up.

It was horrible. Last minute gate change, delays, more delays and then we had to wait for a stweardess to onboard. No explanation for the wait. No apologies. We got to RDM way past schedule @ 1:30 am!!!! Stressful and exhausting. We'd avoid flying Alaska ever again.

The flight was short and smooth. The crew was friendly and courteous.

Flight was delayed 5 hours. Missed connecting flight. Very little apology or attempt to make anything better. Got a $150 credit for next flight. There won’t be another flight. First time on Alaska - last time. Keep your credit. Should have done something more

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.

We waited over an hour for our luggage to arrive at the carousel in Seattle.

Like the friendliness of the crew, each flight had a very very drunk person next to me and the last flight had a very obese man pushing me into the aisle while the crew kept ending up hitting me in the shoulder with the beverage carts.

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

My screen was hard to change channels….seemed it was worn out….i just gave up and read a book I brought

The flight was scheduled for 2:30 PM. Early in the morning we got a text message saying the flight was delayed and rescheduled for 3:00 PM. We got to the airport with that in mind. Then we got a message during check-in at the flight was rescheduled again for 2:30 PM. We almost missed our flight. In fact, our bags Were told that they would not make it. At the end, everything worked out. But it is very stressful.

Most aspects were good however if they assign boarding zones they ought to enforce them or why bother? My luggage from SAN-JFK-MAD was lost in NY so I without my main bag for two days upon arrival in Spain. They were helpful in tracking it and eventually delivered it to my hotel. The flub was because of a delay upon arrival in NYC. I had booked 2 1/2 hours between flights but we had to hold on the taxiway for an hour after landing while waiting for a clear gate which likely caused the baggage error.

Excellent check-in. Crew was good. Excellent communication from flight deck.

Great overall. There was a bit of turbulence so they could only serve water because too much turbulence for the carts. Was glad they prioritized safety though

Excellent flight, the planes were newer, they did a nice job with boarding, great service overall.

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.

Both flights were late 2+ hours with ZERO communication from the airlines or their staff. No offers for compensation. WiFi didn’t work for streaming and they said to only use browsing but that didn’t work either. Waste of $$. No drinks only boxed water or apple juice. No snack. One of the worst flight experiences I’ve ever had.

The ticket and bag check in was chaotic at SEATAC. No clear communication or signage for bag drop off.

This was actually an Alaska flight. I was not able to check in online using the Kayak app or the web for Hawaiian or Alaska airlines. So I contacted Hawaiian and they advised that I had to go to the counter when I arrive at the airport. So I waited in line at the Hawaiian counter for 45 minutes. When I got to the ticket agent she advised that I needed to go to the Alaskan Airlines ticket counter. So I went to that counter which thankfully was not busy. I received my boarding pass and then went to security. I arrived at the gate as boarding was beginning. The frustration is that Hawaiian or Kayak should have directed me to the correct ticket counter. When it is “operated by” a average person doesn't know what that means. Kayak app was silent on what action to take when I was unable to check in online and Hawaiian just stated my ticket number and confirmation numbers were invalid. Communication is key and this process could be cleaned up. Thank goodness I am savvy and speak English, I can’t imagine this process for someone who may not be.

If I knew I would be on Alaska Airlines flying back, I never would have bought the ticket. My flight kept getting delayed and Alaska always seems to be late which is why I don’t fly on them.

Good. They changed our gate very late and then when we landed, we had to wait 20 minutes to get off the airplane because another plane was in a slot.

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.

Book cheap flights from Idaho to Washington

Recent round-trip flight deals

7/4Fri
nonstopAllegiant Air
1h 37mIDA-PDX
7/11Fri
nonstopAllegiant Air
1h 36mPDX-IDA
$82
7/4Fri
nonstopAllegiant Air
1h 37mIDA-PDX
7/11Fri
nonstopAllegiant Air
1h 36mPDX-IDA
$85
9/10Wed
nonstopAlaska Airlines
1h 12mGEG-PDX
9/17Wed
nonstopAlaska Airlines
1h 12mPDX-GEG
$137
8/13Wed
nonstopAlaska Airlines
1h 13mBOI-GEG
8/20Wed
nonstopAlaska Airlines
1h 14mGEG-BOI
$137
9/9Tue
nonstopDelta
1h 42mBOI-SEA
9/17Wed
nonstopDelta
1h 29mSEA-BOI
$137
11/4Tue
nonstopDelta
1h 32mGEG-SEA
11/18Tue
nonstopDelta
1h 14mSEA-GEG
$137
9/9Tue
1 stopHawaiian Airlines
3h 45mBOI-SEA
9/17Wed
nonstopHawaiian Airlines
1h 28mSEA-BOI
$147
10/8Wed
nonstopHawaiian Airlines
1h 15mGEG-PDX
10/19Sun
nonstopHawaiian Airlines
1h 05mPDX-GEG
$147
7/4Fri
1 stop
24h 32mIDA-PDX
7/11Fri
nonstop
1h 36mPDX-IDA
$161
7/4Fri
1 stop
18h 05mIDA-PDX
7/11Fri
nonstop
1h 36mPDX-IDA
$173

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Recent one-way flight deals

6/27Fri
nonstopAllegiant Air
1h 37mIDA-PDX
$56
11/12Wed
nonstopHawaiian Airlines
1h 16mGEG-SEA
$65
9/16Tue
nonstopDelta
1h 25mGEG-SEA
$69
9/15Mon
nonstopDelta
1h 28mGEG-SEA
$79
8/25Mon
1 stopSouthwest
5h 40mBOI-SEA
$79
8/26Tue
2 stopsSouthwest
8h 20mBOI-SEA
$84
9/13Sat
1 stopAlaska Airlines
4h 58mGEG-SEA
$88
10/11Sat
nonstopAlaska Airlines
1h 15mGEG-PDX
$89
6/24Tue
1 stopFrontier
11h 40mGEG-PDX
$96
7/3Thu
1 stopFrontier
22h 42mBOI-PDX
$105

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Last minute flights from Idaho to Washington

Last minute flight, train and bus deals

6/20Fri
nonstopAllegiant Air
1h 37mIDA-PDX
6/23Mon
nonstopAllegiant Air
1h 36mPDX-IDA
$146
6/21Sat
nonstopAlaska Airlines
1h 16mGEG-SEA
6/28Sat
nonstopAlaska Airlines
1h 07mSEA-GEG
$332
6/19Thu
multi-stop
12h 43mBOI-PDX
6/22Sun
nonstop
1h 13mPDX-BOI
$333
6/21Sat
multi-stopAlaska Airlines
4h 12mGEG-SEA
6/28Sat
nonstopAlaska Airlines
1h 08mSEA-GEG
$342
6/21Sat
multi-stopHawaiian Airlines
3h 17mGEG-SEA
6/28Sat
multi-stopHawaiian Airlines
6h 28mSEA-GEG
$351
6/19Thu
multi-stopFrontier
12h 58mBOI-SEA
6/21Sat
multi-stopFrontier
14h 59mSEA-BOI
$379
6/20Fri
nonstopHawaiian Airlines
1h 15mGEG-SEA
6/21Sat
nonstopHawaiian Airlines
1h 08mSEA-GEG
$387
6/19Thu
multi-stop
12h 58mBOI-SEA
6/21Sat
nonstop
1h 21mSEA-BOI
$388
6/20Fri
nonstopDelta
1h 26mLWS-SEA
6/22Sun
nonstopDelta
1h 22mSEA-LWS
$399
6/20Fri
multi-stopDelta
5h 05mLWS-SEA
6/22Sun
nonstopDelta
1h 22mSEA-LWS
$409

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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.

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