Find cheap flights from Washington to Idaho from $59
This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight departing on 9/5. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.Round-trip
1 adult
Economy
Sat 7/8
Sat 7/15
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Good to know
Low season | January |
|---|---|
High season | December |
Cheapest flight | $59 |
Average price round-trip | $322 |
Good deal round-trip | $79 |
Good deal one-way | $39 |
Best time to beat the crowds with an average 6% drop in price.
Most popular time to fly with an average 13% increase in price.
Flight from Seattle to Boise
(avg. price over the last 2 weeks)
or less
or less
FAQs for booking flights from Washington to Idaho
Top 5 airlines serving from Washington to Idaho
Scores according to KAYAK customer reviews8.3
Alaska AirlinesOverall score based on 29427 reviews
85overall
88crew
79food
83comfort
85boarding
79entertainment
Airline reviews
Pros: "Nice quiet flight"
Cons: "Crew member attitude specifically regarding passengers in the emergency rows"
Pros: "Nice quiet flight"
Cons: "Crew member attitude specifically regarding passengers in the emergency rows"
Pros: "This is always a quick flight. They usually only serve OJ and water, but the time goes by that it doesn’t matter!"
Pros: "Nice service deck people and flyt crew. Good clean cabin and seats."
Cons: "Biscoff cookies would have been better than the savory cracker mix."
Pros: "Check in and crew were friendly and helpful. Was in first class so of course was comfortable. Deplaning was quick and efficient."
Cons: "This flight required taking a shuttle from the gate to an offsite location. The distance to the offside was rather far and we were packed in a shuttle. We had to wait for two more shuttles for passengers that were in delayed connections. Additionally, someone apparently filled the plane with too much fuel, throwing off the balance of the plane and we had to wait for some of the fuel to be removed. During this wait, in first class we were only offered orange juice or coffee. I realize it was a very short flight, but a snack might have been a good idea."
Pros: "Flight crew was nice"
Cons: "They were careless with our suitcases. When we got to Vancouver, we were missing wheels on our suitcases. 2 wheels on my husband's and 1 on mine. It made it horrible to pull the suitcases."
Pros: "Timeliness"
Cons: "If alcohol is served on a short flight I recommend getting through drink service faster. I did not appreciate getting my beer at the end (because I was at the back of the plane) and 5 minutes later the crew asking for it back because we were landing soon."
Pros: "Crew was great, the flight was good. Food is good but expensive."
Cons: "Free or inexpensive food options would be nice. I also prefer when the screens are in the back of the seat and I don't have to stream on my phone or pay high prices to use data."
Pros: "Crew were very attentive and hospitable to the crew. I have been flying ASIANA many times and enjoy the flight as well."
Pros: "Bryan was my steward on flight 1402 from Seattle to Portland and he was so kind and helpful. Will fly again just because of him."
Pros: "Polite crew :)"
Cons: "Pretzels!!! Seriously, the Biscof cookies are not as good. Of course, I like salty :)"
Pros: "Everything from hospitality to the ease of the flight. Captain communicated to put all at ease during this time in which this pandemic has gotten many fearful of flying. Great landing as well."
Cons: "Everything was great!"
Pros: "Crew was super amazing and friendly! Very good service also!"
Cons: "No seat back entertainment.."
Pros: "Crew was awesome! Service was quick!"
Cons: "One flight the plane was quite warm and the air overhead was blowing warm air.. didn’t cool down until we were preparing to land and then it blew warm air out again.."
Pros: "Boarding process need to be improved. Seat assignment is horrible"
Cons: "It was fabulous as always! Thank you. I love Delta!"
Pros: "They left the bags at LAX. We we’re driving to Sun Valley and don’t have our ski clothes and equipment"
Cons: "Get our bags to us in the morning"
Pros: "Seats too small"
Cons: "Crappie entertainment. Never figured out how to login on phone,"
Cons: "Flight into Seattle delayed, flight out of Seattle to Minneapolis delayed flights out of Minneapolis to Bismarck delayed. Ran from gate F to gate c24 arrived at 10:23 p.m. Slight to the park at 10:25 p.m. and they closed the door on me as I was running up there. Ran across the entire terminal to get there and they would not let me on. Last Flight of the night to Bismarck. Missed my uncle's 90th birthday party. Would not give me food voucher. Delta gate agent told me she would lose her job if she did not close the doors 8 minutes prior. However the Minneapolis flight waited for 15 minutes for people to board that plane. How does that compute? Why would they not wait 3 minutes for me rather than pay the money to put me up in a hotel?"
Pros: "Crew is always friendly"
Cons: "Aircraft broke, had to route me to an additional three stops just to get me home and through the night. Also, still unsure of where my checked baggage is."
Cons: "We weren't alerted there was a chance of delays. Over two hours late."
The employees at the check-in counter said my disabled wife and I were going to be separated even though we picked seating together when we bought our tickets. They told us my wife would be seated in row 2 and I would be in row 8, because we bought our tickets from a third party. Fortunately the flight crew said: "No, you two need to be together, we'll fix this." Then they seated us together. We are 75 years old and flying is a challenge for us, so we appreciate all the help we can get. Your flight crew was awesome with us, and with the children on our flight as well. Thank You Allegent Air Lines! 🙂
I went to lower my tray table and it was very nasty. Looks like some one had left some food on it and then just closed it up.
My only real issue was that when I booked this flight through Kayak, I somehow booked via BudgetAir.com (though I was on your website.) Due to this, I was unable to access boarding passes coming or going via the Kayak app, or the Allegient app. Luckily I was able to print them prior to leaving home (and the resort printed them for on the way back), but using this site is definitely something I'll have to consider for my trip. I should have been able to access boarding passes electronically via the app regardless.
Pros: "Direct flight"
Cons: "Online check in, we’re charged for everything, EVERYTHING. For that I’ll take a connection next time"
Cons: "Was surprised to see 0 social distancing in the plane. It was packed and not everyone had masks. Should be mandatory."
Cons: "I love the changes that have taken place. I last flew with them 5 years ago and vowed too never fly with them again. Times have changed and they are a great Airline!!!"
Cons: "I'm upset with kayak for sending a survey before I was off the plane!"
Pros: "Allegiant does a great job of turning flights and getting you out on time in general. The crew is friendly and helpful."
Cons: "The landing. the approach was so rough. I've flown 6 times this year. And that was the roughest approach ever"
Cons: "Crew unfriendly. Flight attendants and pilots never acknowledged us or said hello or thank you."
Pros: "Flight and plan where great."
Cons: "Stewardess was very rude and un please y with all customers. Didn’t feel like she wanted to be on the flight. Her attitude was the main problem."
Pros: "The staff at seatac airport were condescending and not helpful...traveling with a service dog and made to pay the pet fee and talked about me where I can over hearnthen in a manner that embarassed me"
Pros: "The food and the crew totally good"
Cons: "Maybe the toilets, need to be clean at least once in a flight"
Pros: "Crew was super nice"
Cons: "Airline to be more user friendly with connecting to free entertainment"
Cons: "Seat 33A. The audio output was bad. Could not clearly hear dialog. Restarting did not help, this issue as consistent got all media programs."
Pros: "Arrived safely."
Cons: "Bumped from business to coach and given a lousy $300 voucher."
Pros: "Ease of boarding."
Cons: "Flight got in late and I was unable to make my connecting flight."
Pros: "Crew was efficient and pleasant making for a good experience."
Cons: "Nothing"
Cons: "Most flights were delayed (3/4 legs) causing bags to not make connections. Had to wait 2 days for my bags in Paris requiring me to purchase new clothes, shoes, toiletries and then spent 4 hours waiting for them at our VRBO- finally delivered it at 4 hours 15 minutes. Also not given adjacent seats on"
Pros: "Crew was excellent and the flight was ahead of schedule."
Cons: "ran out of the food i wanted. poor selection of food... screen on "tv" was too dark to see details"
Pros: "Was able to get on another flight"
Cons: "If they could have held the flight for 15 minutes, I would have made it. My flight from Spokane was late. Now I had to pay another $250 just for a crappy room for the night."
Pros: "I watched a good movie."
Cons: "The plane seemed old. Food was pretty lousy. Hummus was dry, crackers were stale."
Pros: "The overnight flight made it easy to sleep most of the way."
Cons: "I didn't like getting woken up in the middle of the night to eat a sandwich. The bathroom was not stocked well with paper towels, so there was no way to dry my hands after washing them. I also don't know how to order gluten-free meals before the flight."
Pros: "United crew were incredibly kind and accommodating. We had 2 lap babies and a 3 year old. They took our carry-on suitcases and checked them through to our destination without charge -- freeing up valuable hands in the process. They also arranged seats to make sure there were enough air masks for us and our 2 lap children. Our 3 year old had his own seat. In doing so, they moved me and 2 others so that my wife and I were in adjacent rows and there was an empty seat next to each of us (where our babies ended up sleeping). They were very kind and helped us in every way. Overall this was the best experience I've ever had on a flight, period."
Cons: "This was the most uncomfortable flight I have ever had. The plane was so hot we were sitting there sweating the entire time. It made it impossible to sleep or focus on a movie or anything, and it made the flight feel 10 times longer."
Pros: "Flight crew was professional and friendly."
Cons: "Tiny dirty old smelly plane. Freezing cold. No blankets. Flight was also an hour late. No food."
Pros: "The 737-900 was good and loading seemed pretty fast. The gate agent was very friendly and genuine."
Cons: "Weather delay, then an aircraft change due to that, and finally an additional 20 minute delay due to a late crewmember which was not fully explained. If the crew member had also been deleted by the weather I would not have felt so bad about the additional delay."
Cons: "We had to wait for a crew member but we weren’t too late."
Pros: "Tailwinds made the trip arrive earlier than expected even with a slight delay boarding due to the jet not arriving exactly on time. The ERJ's are really nice with the updated seats and tray table in the armrest. It was only an hour and a half flight, so no real way to rate food or entertainment."
Book cheap flights from Washington to Idaho
Recent round-trip flight deals
9/12Tue
nonstopAlaska Airlines
1h 26mSEA-BOI
9/19Tue
nonstopAlaska Airlines
1h 33mBOI-SEA
$111
9/2Sat
nonstopDelta
1h 05mSEA-GEG
9/3Sun
nonstopDelta
1h 11mGEG-SEA
$118
8/29Tue
nonstopAlaska Airlines
1h 20mSEA-BOI
9/3Sun
nonstopAlaska Airlines
1h 32mBOI-SEA
$118
9/12Tue
1 stopMultiple Airlines
6h 43mSEA-BOI
9/19Tue
nonstopMultiple Airlines
1h 35mBOI-SEA
$121
9/7Thu
nonstopAlaska Airlines
1h 27mSEA-BOI
9/14Thu
nonstopAlaska Airlines
1h 33mBOI-SEA
$132
8/16Wed
nonstopDelta
1h 36mSEA-BOI
8/21Mon
nonstopDelta
1h 40mBOI-SEA
$138
8/16Wed
nonstopDelta
1h 08mSEA-GEG
8/17Thu
nonstopDelta
1h 11mGEG-SEA
$138
8/10Thu
nonstopAlaska Airlines
1h 30mSEA-BOI
8/15Tue
nonstopAlaska Airlines
1h 30mBOI-SEA
$143
8/30Wed
nonstopAlaska Airlines
1h 29mSEA-BOI
9/4Mon
nonstopAlaska Airlines
1h 30mBOI-SEA
$148
9/13Wed
nonstopAlaska Airlines
1h 05mSEA-GEG
9/17Sun
nonstopAlaska Airlines
1h 17mGEG-SEA
$148
9/7Thu
nonstopMultiple Airlines
1h 28mSEA-BOI
9/14Thu
1 stopMultiple Airlines
5h 06mBOI-SEA
$152
9/12Tue
1 stopSpirit Airlines
8h 00mSEA-BOI
9/19Tue
1 stopSpirit Airlines
5h 58mBOI-SEA
$153
9/12Tue
nonstopMultiple Airlines
1h 30mSEA-BOI
9/19Tue
1 stopMultiple Airlines
5h 06mBOI-SEA
$157
8/17Thu
nonstopDelta
1h 04mSEA-GEG
8/19Sat
nonstopDelta
1h 21mGEG-SEA
$158
8/12Sat
nonstopDelta
1h 27mSEA-BOI
8/17Thu
nonstopDelta
1h 40mBOI-SEA
$163
9/9Sat
1 stopMultiple Airlines
6h 43mSEA-BOI
9/16Sat
nonstopMultiple Airlines
1h 40mBOI-SEA
$164
8/29Tue
1 stopUnited Airlines
5h 16mSEA-BOI
9/3Sun
1 stopUnited Airlines
4h 49mBOI-SEA
$197
9/7Thu
1 stopSpirit Airlines
4h 49mSEA-BOI
9/14Thu
1 stopSpirit Airlines
5h 06mBOI-SEA
$201
8/16Wed
1 stopUnited Airlines
6h 08mSEA-BOI
8/21Mon
1 stopUnited Airlines
7h 02mBOI-SEA
$207
6/22Thu
1 stopAllegiant Air
11h 16mGEG-IDA
6/25Sun
1 stopAllegiant Air
12h 29mIDA-GEG
$454
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Recent one-way flight deals
9/5Tue
nonstopDelta
1h 35mSEA-BOI
$59
8/22Tue
nonstopDelta
1h 06mSEA-GEG
$59
9/9Sat
nonstopDelta
1h 16mSEA-GEG
$79
6/29Thu
nonstopDelta
1h 31mSEA-BOI
$84
7/16Sun
1 stopAllegiant Air
16h 18mGEG-BOI
$87
6/29Thu
nonstopDelta
1h 08mSEA-GEG
$89
7/11Tue
1 stopSpirit Airlines
19h 19mSEA-BOI
$95
7/7Fri
1 stopMultiple Airlines
17h 46mSEA-BOI
$98
7/15Sat
nonstopAlaska Airlines
1h 08mGEG-BOI
$99
9/6Wed
1 stopUnited Airlines
6h 01mSEA-BOI
$99
7/6Thu
1 stopMultiple Airlines
14h 09mSEA-IDA
$99
7/2Sun
nonstopDelta
1h 08mSEA-GEG
$99
8/7Mon
1 stopMultiple Airlines
15h 22mSEA-BOI
$100
7/13Thu
1 stopMultiple Airlines
19h 13mSEA-BOI
$101
7/24Mon
1 stopMultiple Airlines
15h 22mSEA-BOI
$102
7/2Sun
1 stopAlaska Airlines
2h 54mSEA-GEG
$109
7/13Thu
1 stopSpirit Airlines
19h 19mSEA-BOI
$116
8/22Tue
1 stopAlaska Airlines
6h 00mSEA-GEG
$119
7/15Sat
nonstopAlaska Airlines
1h 43mSEA-IDA
$119
6/15Thu
1 stopAllegiant Air
11h 16mGEG-IDA
$131