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Flight Deals
Cheap Flights from Washington, D.C. to Idaho
Cheapest round-trip prices found by our users on KAYAK in the last 5 daysBook Cheap Washington, D.C. to Idaho Plane Tickets
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 Idaho 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 Idaho
Wed, Dec 9 - Fri, Dec 11
7:12 am - 1:52 pmDCA Washington, D.C. Reagan-National-BOI Boise Air Term. Gowen Fld
8h 40m1 stop Dallas/Fort Worth
12:16 pm - 11:59 pmBOI Boise Air Term. Gowen Fld-DCA Washington, D.C. Reagan-National
9h 43m1 stop Dallas/Fort Worth
$321American Airlines
Mon, Dec 7 - Mon, Dec 14
5:00 am - 11:24 amDCA Washington, D.C. Reagan-National-BOI Boise Air Term. Gowen Fld
8h 24m1 stop Dallas/Fort Worth
1:39 pm - 10:35 pmBOI Boise Air Term. Gowen Fld-DCA Washington, D.C. Reagan-National
6h 56m1 stop Chicago O'Hare Intl
$321American Airlines
Mon, Dec 7 - Tue, Dec 15
7:00 am - 4:04 pmIAD Washington, D.C. Dulles Intl-BOI Boise Air Term. Gowen Fld
11h 04m1 stop Seattle/Tacoma Intl
3:00 pm - 11:36 pmBOI Boise Air Term. Gowen Fld-IAD Washington, D.C. Dulles Intl
6h 36m1 stop Minneapolis St Paul
$321Delta
Wed, Dec 2 - Tue, Dec 8
7:06 pm - 12:10 amIAD Washington, D.C. Dulles Intl-BOI Boise Air Term. Gowen Fld
7h 04m1 stop Minneapolis St Paul
1:47 pm - 12:41 amBOI Boise Air Term. Gowen Fld-IAD Washington, D.C. Dulles Intl
8h 54m1 stop Atlanta Hartsfield-Jackson
$321Delta
Thu, Dec 10 - Thu, Dec 31
10:59 am - 10:27 pmDCA Washington, D.C. Reagan-National-BOI Boise Air Term. Gowen Fld
13h 28m1 stop San Diego
8:21 am - 9:59 pmBOI Boise Air Term. Gowen Fld-DCA Washington, D.C. Reagan-National
11h 38m1 stop Seattle/Tacoma Intl
$321Alaska Airlines
Mon, Dec 7 - Tue, Dec 15
7:47 am - 12:59 pmDCA Washington, D.C. Reagan-National-BOI Boise Air Term. Gowen Fld
7h 12m1 stop Chicago O'Hare Intl
2:42 pm - 11:59 pmBOI Boise Air Term. Gowen Fld-DCA Washington, D.C. Reagan-National
7h 17m1 stop Dallas/Fort Worth
$321American Airlines
Tue, Dec 8 - Mon, Dec 14
5:40 pm - 10:59 pmIAD Washington, D.C. Dulles Intl-BOI Boise Air Term. Gowen Fld
7h 19m1 stop Chicago O'Hare Intl
2:48 pm - 11:15 pmBOI Boise Air Term. Gowen Fld-IAD Washington, D.C. Dulles Intl
6h 27m1 stop Denver Intl
$353United Airlines
Sat, Dec 5 - Wed, Dec 9
7:00 am - 3:26 pmIAD Washington, D.C. Dulles Intl-BOI Boise Air Term. Gowen Fld
10h 26m1 stop Seattle/Tacoma Intl
6:37 am - 4:15 pmBOI Boise Air Term. Gowen Fld-IAD Washington, D.C. Dulles Intl
7h 38m1 stop Seattle/Tacoma Intl
$360Alaska Airlines
Thu, Dec 10 - Thu, Dec 31
7:00 am - 3:26 pmIAD Washington, D.C. Dulles Intl-BOI Boise Air Term. Gowen Fld
10h 26m1 stop Seattle/Tacoma Intl
6:31 am - 4:28 pmBOI Boise Air Term. Gowen Fld-IAD Washington, D.C. Dulles Intl
7h 57m1 stop Seattle/Tacoma Intl
$360Alaska Airlines
Mon, Dec 14 - Thu, Dec 17
2:35 pm - 9:30 pmIAD Washington, D.C. Dulles Intl-BOI Boise Air Term. Gowen Fld
8h 55m1 stop San Francisco
11:55 am - 10:04 pmBOI Boise Air Term. Gowen Fld-IAD Washington, D.C. Dulles Intl
8h 09m1 stop San Francisco
$368United Airlines
Recent one-way flight deals from Washington, D.C. to Idaho
Fri, Dec 25
6:13 pm - 12:32 amDCA Washington, D.C. Reagan-National-BOI Boise Air Term. Gowen Fld
8h 19m1 stop Chicago O'Hare Intl
$161American Airlines
Wed, Jan 20
6:00 am - 1:26 pmDCA Washington, D.C. Reagan-National-BOI Boise Air Term. Gowen Fld
9h 26m1 stop Atlanta Hartsfield-Jackson
$161Delta
Wed, Jan 20
4:15 pm - 9:33 pmIAD Washington, D.C. Dulles Intl-BOI Boise Air Term. Gowen Fld
7h 18m1 stop Denver Intl
$161United Airlines
Sat, Dec 5
3:00 pm - 8:24 pmDCA Washington, D.C. Reagan-National-BOI Boise Air Term. Gowen Fld
7h 24m1 stop Minneapolis St Paul
$161Delta
Wed, Jan 20
6:10 am - 3:10 pmDCA Washington, D.C. Reagan-National-BOI Boise Air Term. Gowen Fld
11h 00m2 stops Dallas Love Field Oakland
$166Southwest
Tue, Apr 20
7:50 am - 4:49 pmDCA Washington, D.C. Reagan-National-BOI Boise Air Term. Gowen Fld
10h 59m1 stop San Francisco
$177United Airlines
Tue, Dec 8
5:05 pm - 11:59 pmDCA Washington, D.C. Reagan-National-BOI Boise Air Term. Gowen Fld
8h 54m1 stop Seattle/Tacoma Intl
$177Alaska Airlines
Sat, Feb 6
5:30 pm - 11:44 pmIAD Washington, D.C. Dulles Intl-BOI Boise Air Term. Gowen Fld
8h 14m1 stop Seattle/Tacoma Intl
$177Alaska Airlines
Thu, Dec 31
6:13 pm - 12:35 amDCA Washington, D.C. Reagan-National-BOI Boise Air Term. Gowen Fld
8h 22m1 stop Chicago O'Hare Intl
$177American Airlines
Wed, Dec 2
12:06 pm - 3:15 pmIAD Washington, D.C. Dulles Intl-IDA Idaho Falls Fanning Field
29h 09m2 stops Atlanta Hartsfield-Jackson Las Vegas Harry Reid Intl
$218Multiple Airlines
Recent last minute flight deals from Washington, D.C. to Idaho
Wed, Nov 11 - Sat, Nov 14
7:12 am - 1:51 pmDCA Washington, D.C. Reagan-National-BOI Boise Air Term. Gowen Fld
8h 39m1 stop Dallas/Fort Worth
1:24 pm - 11:00 pmBOI Boise Air Term. Gowen Fld-DCA Washington, D.C. Reagan-National
7h 36m1 stop Chicago O'Hare Intl
$413American Airlines
Wed, Nov 11 - Tue, Nov 17
5:59 pm - 12:10 amDCA Washington, D.C. Reagan-National-BOI Boise Air Term. Gowen Fld
8h 11m1 stop Salt Lake City
3:00 pm - 11:37 pmBOI Boise Air Term. Gowen Fld-DCA Washington, D.C. Reagan-National
6h 37m1 stop Minneapolis St Paul
$413Delta
Wed, Nov 11 - Sat, Nov 14
5:20 pm - 10:59 pmIAD Washington, D.C. Dulles Intl-BOI Boise Air Term. Gowen Fld
7h 39m1 stop Denver Intl
2:51 pm - 11:15 pmBOI Boise Air Term. Gowen Fld-IAD Washington, D.C. Dulles Intl
6h 24m1 stop Denver Intl
$413United Airlines
Sun, Nov 15 - Sun, Nov 22
7:59 am - 1:39 pmDCA Washington, D.C. Reagan-National-BOI Boise Air Term. Gowen Fld
7h 40m1 stop Atlanta Hartsfield-Jackson
11:10 pm - 9:14 amBOI Boise Air Term. Gowen Fld-DCA Washington, D.C. Reagan-National
8h 04m1 stop Atlanta Hartsfield-Jackson
$413Delta
Wed, Nov 11 - Sat, Nov 14
4:00 pm - 10:35 pmDCA Washington, D.C. Reagan-National-BOI Boise Air Term. Gowen Fld
8h 35m2 stops Omaha Eppley Airfield Denver Intl
5:55 am - 6:15 pmBOI Boise Air Term. Gowen Fld-DCA Washington, D.C. Reagan-National
10h 20m2 stops Las Vegas Harry Reid Intl Chicago Midway
$519Southwest
Wed, Nov 11 - Tue, Nov 17
6:00 am - 6:03 pmDCA Washington, D.C. Reagan-National-BOI Boise Air Term. Gowen Fld
14h 03m2 stops Houston George Bush Intcntl Denver Intl
12:31 pm - 9:11 pmBOI Boise Air Term. Gowen Fld-DCA Washington, D.C. Reagan-National
6h 40m1 stop Chicago O'Hare Intl
$548United Airlines
Tue, Nov 10 - Thu, Nov 12
7:46 am - 3:18 pmIAD Washington, D.C. Dulles Intl-IDA Idaho Falls Fanning Field
9h 32m1 stop Seattle/Tacoma Intl
6:04 am - 4:14 pmIDA Idaho Falls Fanning Field-IAD Washington, D.C. Dulles Intl
8h 10m1 stop Seattle/Tacoma Intl
$602Alaska Airlines
Sun, Nov 15 - Sat, Nov 21
5:00 am - 1:05 pmDCA Washington, D.C. Reagan-National-IDA Idaho Falls Fanning Field
10h 05m1 stop Dallas/Fort Worth
1:43 pm - 11:59 pmIDA Idaho Falls Fanning Field-DCA Washington, D.C. Reagan-National
8h 16m1 stop Dallas/Fort Worth
$662American Airlines
Sun, Nov 15 - Sat, Nov 21
6:40 pm - 1:30 amDCA Washington, D.C. Reagan-National-BOI Boise Air Term. Gowen Fld
8h 50m1 stop Las Vegas Harry Reid Intl
8:50 pm - 8:20 amBOI Boise Air Term. Gowen Fld-DCA Washington, D.C. Reagan-National
9h 30m2 stops Las Vegas Harry Reid Intl Nashville Intl
$684Southwest
Wed, Nov 11 - Wed, Nov 18
5:17 pm - 3:27 pmIAD Washington, D.C. Dulles Intl-BOI Boise Air Term. Gowen Fld
24h 10m2 stops Seattle/Tacoma Intl Sacramento Intl
1:53 pm - 5:44 amBOI Boise Air Term. Gowen Fld-IAD Washington, D.C. Dulles Intl
13h 51m1 stop Seattle/Tacoma Intl
$744Alaska Airlines
Booking Insights
KAYAK's insights & trends for Washington, D.C. to Idaho flights
Get data-powered insights and trends into flights from Washington, D.C. to Idaho to help you find the cheapest flights, the best time to fly and much more.
Prices
Airlines
More
What is the cheapest Washington, D.C. to Idaho flight route?
Data is based on round-trip flight searches on KAYAK over the past month.
The cheapest ticket to Idaho from Washington, D.C. found in the last 5 days was to Idaho Falls, at $447 round-trip. The most popular route is from Washington, D.C. Dulles Intl Airport (IAD) to Idaho Falls (IDA), and the cheapest round-trip airline ticket found on this route in the last 5 days was $447.
What is the cheapest month to fly from Washington, D.C. to Idaho?
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 Idaho, 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 Idaho is May, when tickets cost $389 (return) on average. On the other hand, the most expensive months are December and July, when the average cost of round-trip tickets is $608 and $549 respectively.
How long does a flight from Washington, D.C. to Idaho take?
The duration of a flight to Idaho depends on your arrival airport. The shortest routes to Idaho from Washington, D.C. are to Boise, which takes 7h 09m, Hailey, which takes 7h 11m, and Lewiston, which takes 8h 06m.
Which cabin class options are there for flights between Washington, D.C. and Idaho?
The average price of round-trip flights for each cabin class for the route found by users searching on KAYAK over the last 2 weeks.
There is only one cabin class option available for the route, which is Economy. Perform a search on KAYAK to find the latest prices and availability for all cabin fares, which differ across airlines.
Good to know
Low season | January |
|---|---|
High season | July |
Cheapest flight | $161 |
FAQs - booking Idaho flights
Reviews of the top 4 airlines serving from Washington, D.C. to Idaho
See real verified KAYAK customer reviews for airlines flying from Washington, D.C. to Idaho. 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.
8.0
SouthwestOverall score based on 4218 reviews
8.0Comfort
7.4Entertainment
8.1Boarding
8.6Crew
7.0Food
Airline reviews
My first flight from LGA to STL was not good. They didn't do service until over halfway through the flight, the internet didn't really work, and the crew all seemed like they didn't want to be there.
4.0 OkayTatyana, Nov 2026
My first flight from LGA to STL was not good. They didn't do service until over halfway through the flight, the internet didn't really work, and the crew all seemed like they didn't want to be there.
We were stressed about landing as our connecting flight was about to start boarding, being unfamiliar with the airport or where the gates were. We exited the plane to discover we were at the gate we needed. We would be getting back on the same plane but nobody told us we could have just stayed onboard. My wife and I were seated on aisle seats across from each other. We asked if there was a way we could sit together. Once we were at cruising altitude they let us move to an unoccupied row so that was nice.
It’s Southwest. The seats are small, the snacks are meh, it’s $50 to check a bag. It’s exactly fine. Could have been better. Could have been worse. It’s not Spirit
They delayed my flight all day but didn't try to reschedule me until all other options were gone. Ended up on a red eye. Not happy. Lesson learned, don't book the last flight from SJC to RDU.
It's a shame that SW was previously my preferred carrier until they started imposing all these fees (luggage, seats,etc) and pulling back on other perks. I only flew with them this time due to time frame I needed to be at destination. Wasn't provided gate info during check-in, Gate info wasn't displayed at airport until last minute, gate info didn't match what SW personnel announced at fate. Kind of a mess.
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.
No delays and arrived to destination 30 min early. Staff was super friendly.
Pretty standard flight. We left late, but arrived early. The wifi entertainment is always nice. The free snacks and beverages are simple, but appreciated. I'm tall and the seats are an issue. I can deal with a short flight, but any longer, I have to find another airline where I know beforehand I have extra legroom.
Awesome experience. No in-flight video or meal. Still do not like the boarding process.
On time, good crew, easy flight. Just like the old days!
We experienced delays in small increments that added up to more than an hour. At the gate, staff showed little concern and compared our delay with the inbound flight’s two-hour tarmac wait, which didn’t address our situation. Once onboard, the flight attendants seemed tired and unfriendly. I understand delays are frustrating for everyone, but passengers shouldn’t feel blamed for them. During the flight, a bright light above the emergency exit stayed on. It was concerning, and no one explained it or offered passengers the option to move. After landing, we waited about 30 minutes on the tarmac for a gate, then waited again for an agent to connect the plane to the terminal. From the Reagan gate staff to the cabin crew and RDU personnel, the service felt dismissive throughout. Overall, this was a stressful trip and a very disappointing customer-service experience
delayed take-off, then had to circle in air for awhile, wi-fi did not work, then the cabin got extremely hot multiple times and the luggage was at wrong carousel at LGA. In addition, plenty of overhead space so they checked bags too early. Horrible flight.
WiFi only works on about 75% of my Delta flights. I rarely fly SW, but their WiFi works 100% of the time and is easy to connect. On my DL flight from DCA to BNA today, I try to connect to WiFi for about 30 minutes, but I gave up. I have a lot of work to do, and I lost two hours today. Very frustrating.
I don't know why the crew decided to board 15 minutes early without informing anyone not at the gate. Why would you have the app send a notification that we're boarding on time, instead board early, and then rush me to the gate. Then have me check my carry-on when I specifically packed my bag as to not do so.
Long delays at both DCA and MSP; Crew did not keep us informed (or very little). Airplane was showing signs of heavy use (not up to Delta standards). Food options for Business Class have dropped in quality. After landing we sat on tarmac for maybe 25 minutes with no provided chance to use the bathroom and crew did not tell us what was going on or give an estimated time to expect to be at a gate.
Flight was delayed for about an hour but overall good experience
The gentleman at the gate I think his name is RIE was exceptional
This flight was no comparison to our prior flight. I'm thinking it all has to do with the age of the aircraft.
2 of the seats in row 31 the entertainment system was not working, and one seat the tray table did not go all the way down. Flight arrived early and departed on time which was great.
Waited at the usual crowded gate at DCA where one ends up standing up because there aren't enough seats.
Terrible boarding - 4 flights boarded from the same gate. Chaos there; long ramps to the plane.
The couple in front of me were constantly talking over the announcement from the captain and this was annoying me.
Short. Nice quick flight, appreciated after Munich to DC leg.
This was a small aircraft (relatively) and we were delayed half an hour on takeoff, which is not the airlines fault.
Flight delayed over an hour with plane on runway because of weather in an area of the country we were not in or flying to.
Flight attendant incredibly rude. Stuck her finger in my drink and didn’t even have the courtesy to apologize.
The food was horrible. There was no. Wifi, and it was just terrible from bangkok to d. C
Crew was great. Seats are cramped and uncomfortable and I’m a small person.
the seat has a problem. the back had a hole.
My flight was delayed so bad i missed u it so i just said never mind
Crew tried to accommodate late arrival due to late departure
I injured myself during my trip. The staff of American Airlines were very compassionate and empathic. They took additional steps to make my experience easier. Thank you!!
There was no ground crew at HSV gate when we arrived. The were busy with another arrival. We had to wait 20 mins for them to arrive and direct the plane to the gate. It took almost 45 mins to get my luggage. The luggage belt had 3 flights bags on it and the other 2 luggage belts were not being used. It looked like there was only 1 crew serving .3 arriving flights.
Liked: staff, no delays, Could use some improvement: Food, comfort, cleanliness, lack of chargers on the DCA -> DSM flight
It was close to its perfect the flake could be took off early, landed early, didn’t have to wait for my daughter stroller luggage came out quick, very efficient, very good flight
comfy and spacious seats for premium economy, nice flight attendants. only problem was the wifi did not work, and my entertainment screen was locked in Arabic language and all kids shows with no way of seemingly changing it. but the flight was fine and I arrived with no issues
Flight was delayed which isn’t the airline’s fault, but the communication around it was terrible. I left the lounge to show up at the gate to board at the time in my app, and the flight in front of mine was still boarding and the inbound plane hadn’t even taken off yet. Delays were slow to show up in my app. Improved communication could have let me have a more pleasant experience in the lounge vs waiting 1.5 hours at the gate.
Wifi was good on the flight from DCA to Dallas and terrible on the flight from Dallas to Tucson. The forward head in the flight from Dallas to Tucson was putrid smelling entirely urine soaked. The flight from DCA to Dallas was delayed by almost 30 min with a plane change.
Sat on tarmac at arrival at DFw for more than 30 min waiting for a gate.
Business Class layout was excellent. The seats were not nearly as comfortable as UA, Delta or Air New Zealand (the best). Nor were the controls as flexible. Food was okay but not great. Breakfast pancakes were like cardboard.
More options for your flight from Washington, D.C. to Idaho
Complete your trip to Idaho with a hotel stay or car rental
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.
Flights from other airports in Washington, D.C. to Idaho
Flights from all airports in Washington, D.C. to Idaho. Prices are the lowest found on KAYAK over the last 7 days. Price and availability is not guaranteed.
Flights to other popular destinations
The most popular flights on KAYAK according to clicks in the last 2 weeks. Prices are the lowest found on KAYAK over the last 7 days. Price and availability is not guaranteed.
Flights from Washington, D.C. to popular cities in Idaho
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