WAS - BOI

$66 Find Cheap Flights from Washington, D.C. to Boise

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Washington, D.C. to Boise departing on 1/22. 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.
1 adult
1 adult, Economy, 0 bags

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

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Washington, D.C. to Boise, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Washington, D.C. to Boise, as well as popular online travel agencies
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Everything you should know

Cheapest round-trip
$146
Overall average: $435
Frontier
Sat 2/14Fri 2/20
DCA - BOI • 1 stop
Cheapest one-way
$66
Overall average: $159
Frontier
Thu 1/22
DCA - BOI • 1 stop
Top airlines
Frontier
Cheapest • from $170 (round-trip)
Alaska Airlines
Best reviews • 8.0 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
When to travel
April
Cheapest • 28% price drop
April
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
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Flight Deals
Booking Insights
Flight Deals

Cheap Flights from Washington, D.C. to Boise (WAS-BOI)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Washington, D.C. to Boise that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Washington, D.C. to Boise

Sat, Feb 14 - Fri, Feb 20
Frontier Logo
2:00 pm - 11:11 am
DCA
-
BOI
23h 11m1 stop
Frontier Logo
11:56 am - 1:00 pm
BOI
-
DCA
23h 04m1 stop
$146Frontier
Sat, Feb 14 - Thu, Feb 19
Frontier Logo
6:00 pm - 11:11 am
DCA
-
BOI
19h 11m1 stop
Frontier Logo
12:36 pm - 9:59 pm
BOI
-
DCA
7h 23m1 stop
$157Frontier
Tue, Mar 10 - Wed, Mar 18
Delta Logo
4:40 pm - 11:53 pm
DCA
-
BOI
9h 13m1 stop
Delta Logo
11:30 pm - 9:10 am
BOI
-
DCA
7h 40m1 stop
$239Delta
Tue, Feb 3 - Tue, Feb 10
Alaska Airlines Logo
6:04 pm - 10:52 am
IAD
-
BOI
18h 48m1 stop
Alaska Airlines Logo
6:23 am - 4:26 pm
BOI
-
IAD
8h 03m1 stop
$239Alaska Airlines
Tue, Feb 3 - Tue, Feb 10
Delta Logo
2:15 pm - 11:12 pm
IAD
-
BOI
10h 57m2 stops
Delta Logo
3:03 pm - 11:57 pm
BOI
-
IAD
6h 54m1 stop
$244Delta
Thu, Feb 5 - Tue, Feb 10
Alaska Airlines Logo
7:14 pm - 10:52 am
BWI
-
BOI
17h 38m1 stop
Alaska Airlines Logo
1:55 pm - 6:14 pm
BOI
-
BWI
26h 19m1 stop
$255Alaska Airlines
Thu, Feb 5 - Tue, Feb 10
United Airlines Logo
8:42 am - 4:10 pm
BWI
-
BOI
9h 28m1 stop
United Airlines Logo
7:45 am - 9:26 pm
BOI
-
BWI
11h 41m2 stops
$260United Airlines
Wed, Feb 4 - Sat, Feb 7
United Airlines Logo
4:10 pm - 9:52 pm
BWI
-
BOI
7h 42m1 stop
United Airlines Logo
10:15 am - 9:26 pm
BOI
-
BWI
9h 11m1 stop
$268United Airlines
Sat, Feb 14 - Tue, Feb 17
Southwest Logo
5:45 pm - 12:20 am
BWI
-
BOI
8h 35m1 stop
Southwest Logo
7:05 pm - 5:45 am
BOI
-
BWI
8h 40m1 stop
$284Southwest
Sat, Feb 14 - Tue, Feb 17
Southwest Logo
5:45 pm - 12:20 am
BWI
-
BOI
8h 35m1 stop
Southwest Logo
7:05 pm - 5:45 am
BOI
-
BWI
8h 40m2 stops
$289Southwest
Booking Insights

KAYAK's insights & trends for Washington, D.C. to Boise flights

Get data-powered insights and trends into flights from Washington, D.C. to Boise to help you find the cheapest flights, the best time to fly and much more.

How much is a round-trip flight from Washington, D.C. to Boise?

This analysis is based on the cheapest round-trip price found on KAYAK in the last 12 months by searching for a flight from Washington, D.C. to Boise departing in February.

What is the cheapest month to fly from Washington, D.C. to Boise?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Washington, D.C. to Boise, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from Washington, D.C. to Boise is April, where tickets cost $298 (return) on average. On the other hand, the most expensive months are December and January, where the average cost of round-trip tickets is $642 and $455 respectively.

Good to know

Low seasonNovember
Cheapest flight$66
Best time to beat the crowds with an average 11% drop in price.
Most popular time to fly and prices are also 29% lower on average.
Flight from Reagan Washington National Airport to Boise

When to book flights from Washington, D.C. to Boise

Are your dates flexible? Find out the best times to travel from Washington, D.C. to Boise based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from Washington, D.C. to Boise

  • What is the cheapest flight from Washington, D.C. to Boise?

    In the last 3 days, the lowest price for a flight from Washington, D.C. to Boise was $66 for a one-way ticket and $146 for a round-trip.

  • Do I need a passport to fly between Washington, D.C. and Boise?

    Even though you are not required to have a passport, keep in mind that an official ID is needed to board the airplane.

  • Which airports will I be using when flying from Washington, D.C. to Boise?

    Washington, D.C. is served by 2 major airports and there is only 1 main airport in Boise. You will leave Washington, D.C. from one of these airports: Washington, D.C. Reagan-National or Washington, D.C. Dulles Intl. You will be arriving at Boise Air Term. Gowen Fld.

  • Which aircraft models fly most regularly from Washington, D.C. to Boise?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from Washington, D.C. to Boise?

    oneworld, Star Alliance, and SkyTeam are the airline alliances operating flights between Washington, D.C. and Boise, with oneworld being the most commonly used for this route.

  • Which is the best airline for flights from Washington, D.C. to Boise, Alaska Airlines or Southwest?

    The two airlines most popular with KAYAK users for flights from Washington, D.C. to Boise are Alaska Airlines and Southwest. With an average price for the route of $233 and an overall rating of 8.0, Alaska Airlines is the most popular choice. Southwest is also a great choice for the route, with an average price of $481 and an overall rating of 8.0.

  • How does KAYAK find such low prices on flights from Washington, D.C. to Boise?

    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, D.C. to Boise.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Washington, D.C. to Boise?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Boise from Washington, D.C. 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, D.C. to Boise?

    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 to Boise with an airline and back to Washington, D.C. with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Washington, D.C. to Boise?

    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 to Boise from Washington, D.C. up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top 5 airlines serving from Washington, D.C. to Boise

 
See real verified KAYAK customer reviews for airlines flying from Washington, D.C. to Boise. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Washington, D.C. to Boise? 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 11681 reviews
8.1Boarding
8.5Crew
7.8Comfort
7.0Entertainment
7.1Food
Airline reviews

The seats are very small. I’m 5’ 3”, so don’t think I should notice. The food selection was non existent and very disappointing. 5 hour flight plus TSA, etc. I would have appreciated a small salad, crudités. Something fresher not just chips.

8.0 ExcellentAnonymous, Dec 2025
DCA - SFO
Read more Alaska Airlines reviews

The seats are very small. I’m 5’ 3”, so don’t think I should notice. The food selection was non existent and very disappointing. 5 hour flight plus TSA, etc. I would have appreciated a small salad, crudités. Something fresher not just chips.

The seats were not very comfortable and there were no TV screens. Boarding was pretty fast because there were so few people on such a small plane and I appreciated that they still gave us our snack and drinks, however I really wish they would come up with a good gluten-free snack.

Flight crew and flight were good. But it departed two hours late.

We appreciated that the flight attendant came through 3 times with drinks or water on the long flight..I was also glad that they were separating out recycling! I would have liked a 12oz sofa can instead of 7oz, but that's a minor quibble. The knee space in economy was also better than most of Alaska's competitors.

I liked the free snacks and drink. I liked the onboard entertainment. I did not like the WiFi cutting out in middle of my movie.

Flight from LAX to STS das excellent. Flight from DCA to LAX was troubled by the previous flight returning to the one DCA gate putting our flight in jeopardy. However another gate was arranged and that flight was a bit late, but was handled exceptionally.

Pretzels are always a disappointment. Cheezits, Sun Chips, trail mix, anything else would be nice.

Boarding process was poorly handled by the gate crew and the onboard crew. No effort was made to provide equal treatment to passengers with overhead bin space. Crew seemed disengaged and unfriendly.

Awesome. Great flight. Super nice people and I like the extra space

On time, WiFi worked, reasonable legroom, helpful staff. Unfortunately there was no water for handwashing in the rear lavatory.

The flight crew was extremely rude and especially not helpful when our flight was delayed.

Pretty seamless, just a tad bit late in taking off and landing.

Flight was fine other than there was a gate change that I was not notified of. By chance I happened to check my phone and saw the change, otherwise, we would have missed our connecting flight.

Haven’t flown on SW in years. Flight was on time departing and arriving. Served vegan butter onion flavored pretzels which were bad. Coke served was in a tiny paper cup. Crew was not engaging. Felt like they were going through the motions. Old plane, tight seats and no leg room.

Check-in, Boarding and flight were smooth. All the employees and crew was very nice and funny. They gave the kids crayons and workbooks to keep them occupied which was a big win. I’ve flown Southwest many times and that’s the first time I’ve seen that and it is a great addition.

Flight was on time. Wi-fi was a little spotty/slow. Boarding and exit were efficient.

Okay, not wonderful. Short flight. Wi-fi didn't work properly. Stuck waiting for a gate to open upon arrival for 20 or so minutes.

They sent a notice that they were boarding an hour early. We had to leave the club and run to the gate. They said sorry, that came from corporate and was a mistake. They did not have enough seating because the flight before it had not taken off on time. They moved our gate and delayed it for an hour.

The boarding and seat assignment system no longer works for me, but I know it is being replaced. Otherwise, I am good with the overall experience.

The lead steward kept singing about "San Francisco" and hotel California---more annoying than humorous....needs work. Flight was smooth and on time.

Food is basically Sun Chips, cookies or Cheezits. I had an exit row seat so I had plenty of room. The crew was very nice and efficient. Pilot kept us informed. Pretty good flight.

Air travel sucks. It continues to be awful for all airlines. No shame on delta alone.

It was Delta, but the flight attendants were stressful and disrespectful. I am a diamond member a travel weekly. I have not had a negative thing to share in quite some time. But this was noticeable.

Comfort Plus seat 11E seemed smaller than prior flights. The movie selection is good. Watched most of the most recent Tron movie. I'll watch the remaining part later as my movie is saved in the Delta Seatback Experience.

Flight was late from Newark to Atlanta, I asked flight attendant to please let my family of 3 out first when we landed to Atlanta because we were late for our connecting flight to Quito. She didn't and we were late for 5 minutes we couldn't board the plane and spend hours trying to get another flight with customer service for the next day.

I really liked the legroom. I am 6’4”.a at For some reason our seats were not together and using the app to fix it didn’t work. Passengers were nice enough to move for us but you should absolutely ensure a parent sits with their child.

Late delayed flight delays boarding and delays leaving and delays on arrival too. Cramped plane no room no food.

DTW line is too long. The flights from DTW to BWI are always delayed for unknown reasons.

Delta canceled our flight and we had to scramble to find another airline to get home. Phoenix is not a delta hub so they didn’t have another plane. It would have been a red eye though Salt Lake City. Getting in at 5am. No bueno.

This flight was no comparison to our prior flight. I'm thinking it all has to do with the age of the aircraft.

Sat next to a one year old. She crawled all over the place and made me laugh.

The Crew and the food was the worst I ever had in Business Class. First they told us there were no space for carry on. It was plenty of space over our 2 row seats, we had to ask to let us travel with it which was accepted. They were aware that we had to run for the connection due to the previous flight delay. Have us one hour waiting for more customers and not even offer a glass of water. Then started the service and they started to serve other passengers drinks in business and did not offer any drinks until they serve our pre ordered meal and I ask for something to drink. I had to wait until they finished to serve all passengers until Inget something. The crew was the worts I ever had for Business Class in my life.

Not great experience - we were super late boarding due to issues with aircraft. Then when we finally all got onboard and seated and they started taxiing out to the runway they just stopped then turned around and went back to the airport. Apparently the crew “ran out of time” to legally fly us. They mentioned that they were about 2 minutes away from taking off. I understand the rules and safety but kinda wonder why they would have bothered boarding us in the first place? Had to go all the way back and de plane and then wait in a HUGE line to get a hotel (this is somewhere around 2:30am) finally got to hotel by Uber (no shuttle after 20min so gave up) and they ended up putting us all back on the same aircraft at 10am next morning so got about 2.5 hours sleep. They did give us. $250 credit, but it was a São Paulo Brazil flight out of Dulles. The flight and everything was fine.

Starlink wifi on the Embraer E175 is an excellent experience. I was able to connect and work from IAD all the way to approach into BTV.

7 hours delayed due to operational issues on United’s end. Basically laziness.

Short flight but an "eager to help" crew made the journey more enjoyable!

During booking, I kept trying submitting my payment from the Mexican website and it didn't work. After I had the idea to change it to the Canadian website, it worked but I had to be charged the equivalent of 50 CAD more. I received the clear instruction that I would only be able to check-in at the airport and that it was impossible to select a seat 24 hours before departure, that I had to pay 144 CAD to do so, although not only was I able to check-in 24 hours before departure, but I could have selected my seats for free then. All in all, I almost threw $200 out the window due to misleading information. Besides, the app kept crashing, the information to get to the gate on the app was inaccurate, my gate was switched and I was only informed once in the air (luckily I had noticed the departure pannel), I was not addressed in my language beforehand and even if I tried I was immediately answered in English (which meant the crew understood but didn't want to answer accordingly), there was only one snack & beverage service on my medium haul flight and no beverage service on my short haul flight. To be fair, the planes were comfortable, the crew apart from the language issue was helpful, dynamic and engaging, the plane was clean and the directions were clear and direct. United has a lot of potential to be one of my favourite airlines, but the devil is in the details and a lot of them missed the target.

Better WiFi. I cannot understand that in 2025, United is so behind on a technology that is now a necessity and still painfully unreliable, slow and keeps disconnecting.

Great service on board. Boarding a bit slow due to process. Food was pretty average.

Very small cramped plane for an international flight. Everything else was good, but it was maybe the smallest comfort-wise I've ever been on for longer than 3-4 hours and the trip was 7.5

Lower WiFi prices; allow us to see our flight on a map; more variety of drink choices.

So excited very proud first of all I wanna thank kayak all updates very professional and fast alart And amazing cabin crew so nice to me they deserve big salute

UGH I HAD TO MISS MY FIRST FLIGHT TO TAMPA CAUSE OF THE 10 MINUTE DELAY OF THE ORLANDO TO MIAMI ONE SO THEY HAD ME GET ANOTHER TICKET. I AM NOT HAPPY AT ALL BECAUSE IT MADE ME MISS MY CONNECTING FLIGHT FROM TAMPA TO LONDON AND FORCED ME TO MISS A DAY AT MY ROOM IN THE UK.

Wish they didnt delay off-boarding for 10 minutes so i could connect to my flight from miami to tampa

We experienced gate changes and a long delay. My seat was dirty when I boarded and I had to use wipes to clean it myself. There was an unpleasant and overpowering cleaning product scent on the plane as well that lingered through the flight.

Seats were much more cramped then on the 737. Narrower and rows closer together. Flight was absolutely packed and the plugs under the seats didn't work. Was forced to check my bag even though previous flight had no issue with it.

It was fine. My connection in Charlotte to go to WPB was too late and I had to spend the night in the Charlotte Airport in the mini suites.

The flight was on time and arrived early. The crew were friendly and helpful.

delayed due to weather. Could not communicate with family since the wifi was broken

I got sick nothing contagious but distressing and the care I received by Kayla? Keighly the flight attendant will be memorable for ever. Thank You

Everything you need to know for your flight from Washington, D.C. to Boise

Information on your arrival and departure airports