IDA - WAS

$175 Find Cheap Flights from Idaho Falls to Washington, D.C. - Compare and Save

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Idaho Falls to Washington, D.C. departing on 8/25. 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

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Everything you should know

Cheapest round-trip
$239
Multiple Airlines
Fri 8/21Thu 8/27
IDA - IAD • 1 stop
Cheapest one-way
$175
United Airlines
Tue 8/25
IDA - IAD • 1 stop
Top airlines
Cheapest • from $349 (round-trip)
Best reviews • 7.8 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
Nonstop flights
Not available
There are currently no direct flights between Idaho Falls and Washington, D.C.. You'll need at least 1 connection.
Insights
Insights
Insights
Insights
Top layover airports
Cheapest • Avg $329 (round-trip)
Shortest trip • 5h 56m (one-way)
Insights
Insights
Insights
Insights
When to travel
Cheapest • 100% price drop
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
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KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to Washington, D.C.!
Flight Deals
Booking Insights
Flight Deals

Cheap Flights from Idaho Falls to Washington, D.C. (IDA-WAS)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Idaho Falls to Washington, D.C. 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 Idaho Falls to Washington, D.C.

Fri, Aug 21 - Thu, Aug 27
Multiple Airlines Logo
5:33 pm - 8:04 am
IDA
-
IAD
12h 31m
1 stop
Multiple Airlines Logo
8:59 am - 10:22 am
IAD
-
IDA
27h 23m
1 stop
$239Multiple Airlines
Fri, Aug 21 - Thu, Aug 27
Multiple Airlines Logo
5:33 pm - 8:04 am
IDA
-
IAD
12h 31m
1 stop
Multiple Airlines Logo
8:59 am - 10:22 am
IAD
-
IDA
27h 23m
1 stop
$241Multiple Airlines
Fri, Aug 21 - Thu, Aug 27
Multiple Airlines Logo
1:44 pm - 10:52 pm
IDA
-
IAD
31h 08m
2 stops
Multiple Airlines Logo
8:59 am - 10:22 am
IAD
-
IDA
27h 23m
1 stop
$286Multiple Airlines
Mon, Aug 10 - Fri, Aug 14
Multiple Airlines Logo
10:54 pm - 10:16 am
IDA
-
IAD
33h 22m
2 stops
Multiple Airlines Logo
9:50 am - 4:05 pm
IAD
-
IDA
8h 15m
1 stop
$303Multiple Airlines
Fri, Aug 21 - Thu, Aug 27
Multiple Airlines Logo
5:33 pm - 5:14 pm
IDA
-
IAD
21h 41m
2 stops
Multiple Airlines Logo
8:59 am - 10:22 am
IAD
-
IDA
27h 23m
1 stop
$307Multiple Airlines
Fri, Sep 25 - Tue, Sep 29
Delta Logo
1:05 pm - 11:33 pm
IDA
-
IAD
8h 28m
1 stop
Delta Logo
7:00 am - 12:15 pm
IAD
-
IDA
7h 15m
1 stop
$349Delta
Fri, Aug 14 - Sat, Aug 22
Delta Logo
7:00 pm - 6:20 am
IDA
-
BWI
9h 20m
1 stop
Delta Logo
12:17 pm - 10:32 pm
BWI
-
IDA
12h 15m
2 stops
$354Delta
Fri, Aug 21 - Mon, Aug 24
American Airlines Logo
2:20 pm - 11:58 pm
IDA
-
DCA
7h 38m
1 stop
American Airlines Logo
5:00 am - 11:30 am
DCA
-
IDA
8h 30m
1 stop
$374American Airlines
Wed, Sep 2 - Mon, Sep 7
American Airlines Logo
1:43 pm - 11:59 pm
IDA
-
DCA
8h 16m
1 stop
American Airlines Logo
5:00 am - 11:30 am
DCA
-
IDA
8h 30m
1 stop
$440American Airlines
Sat, Oct 31 - Tue, Nov 3
Alaska Airlines Logo
6:09 am - 4:25 pm
IDA
-
DCA
8h 16m
1 stop
Alaska Airlines Logo
5:00 pm - 11:42 pm
DCA
-
IDA
8h 42m
1 stop
$474Alaska Airlines
Booking Insights

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

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

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

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Idaho Falls to Washington, D.C., 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 Idaho Falls to Washington, D.C. is January, where tickets cost $0 (return) on average. On the other hand, the most expensive months are December and November, where the average cost of round-trip tickets is $840 and $715 respectively.

Good to know

Low seasonOctober
Cheapest flight$175
Best time to beat the crowds with an average 29% drop in price.
Most popular time to fly and prices are also 11% lower on average.
Flight from Idaho Falls to Washington Dulles Airport

When to book flights from Idaho Falls to Washington, D.C.

Are your dates flexible? Find out the best times to travel from Idaho Falls to Washington, D.C. 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 Idaho Falls to Washington, D.C.

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

    In the last 5 days, the lowest price for a flight from Idaho Falls to Washington, D.C. was $175 for a one-way ticket and $239 for a round-trip.

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

    No, a passport isn't needed to fly from Idaho Falls to Washington, D.C.. However, local authorities might ask for an official ID.

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

    Idaho Falls is served by only 1 airport and there are 2 airports in Washington, D.C.. You will leave Idaho Falls from Idaho Falls Fanning Field and you will be arriving in Washington, D.C. at one of these airports: Washington, D.C. Reagan-National or Washington, D.C. Dulles Intl.

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

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

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

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

  • Which is the best airline for flights from Idaho Falls to Washington, D.C., Delta or United Airlines?

    The two airlines most popular with KAYAK users for flights from Idaho Falls to Washington, D.C. are Delta and United Airlines. With an average price for the route of $624 and an overall rating of 7.8, Delta is the most popular choice. United Airlines is also a great choice for the route, with an average price of $559 and an overall rating of 7.4.

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

    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 Falls to Washington, D.C..

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

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

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

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

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

Reviews of the top airlines flying from Idaho Falls to Washington, D.C.

 
See real verified KAYAK customer reviews for airlines flying from Idaho Falls to Washington, D.C.. 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 Idaho Falls to Washington, D.C.? 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.
7.8
DeltaOverall score based on 8464 reviews
8.1Boarding
7.8Entertainment
8.5Crew
7.8Comfort
7.2Food
Airline reviews

The flight was smooth, the crew was great but the plane was quite old

8.0 ExcellentDimitrina, Apr 2026
BOS - DCA
Read more Delta reviews

The flight was smooth, the crew was great but the plane was quite old

Flight was warm for first few hours and quite rough

This flight was a first class choice and left much to be desired. Seat backs on seats were falling apart and torn. Seats actually didn't come to a "full & upright position". Pull out table was sprung. Not any significant leg room. All in all we were on an obviously older plane and felt overcharged for what we received as first class.

Flight was delayed several times. At one point, they "pulled back" 15 minutes from the delayed boarding and sent a text saying we would board sooner than previously advised. The flight then was delayed again. And when we boarded, there was an unspecified technical issue which had us waiting in the plane for about an hour.

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

My husband is very tall and we generally fly Delta Comfort. We used our companion benefit, and our seats were coach and extremely uncomfortable........ horrid even

I specifically picked out right side aisle seats because my left knee sometimes needs to be stretched. But my experience this trip was that the seats were shuffled and I lost those assigned seats, resulting in me having to sit in a much less desirable position for my comfort.

Other airlines were canceling flights but Delta got us home. Crew was friendly and professional. It would have been nice to have had a little more notice about the delays because we had already arrived at the airport when the first of several delays were communicated but I understand that storm forecasting isn’t simple and we were grateful that Delta didn’t just cancel the flight.

On time departure, smooth trip, flight attendant told through passengers the gate we would arrive at and the gate our outbound flight was departing from. Early arrival

1st flight had mechanical issues after we boarded and almost took off. They tried to fix on runway but couldn’t do we went back to the gate. They couldn’t fix it there either. So we had to deplane and board another plane 2 hrs later. All in all our flight was delayed 4 hrs so we had to cancel some business meeting we had in London for the morning since we were supposed to arrive at 7am and did not arrive until 11:45am. Also, the 2nd plane had mechanical issues as well but fortunately they were able to fix on runway.

Our flight was great with an unexpected upgrade. However, four days into our travel we are still without a piece of luggage. The bag tracker has not been accurate, the airline is not communicating with me or the luggage delivery service and no one is willing to take responsibility or guarantee any kind of support or reimbursement. Unfortunately, we do not have the option to easily shop to replace items as we are currently on a cruise. I have been very disappointed by United Airlines response.

It was terribly delayed with zero support from united airlines. I reached at 1 am in the night. They did not provide any option to change the flights.

Flight was delayed 14 hours due to DC air show and weather. Missed connection to MUC.

Horrible I am at almost 2,000,000 miles on United. This was probably the worst flight ever. An hour and a half before takeoff I get a message that they’re changing the plane and I no longer have a seat in Polaris business Supposedly, there was a problem with the plane, but then there was no other plane Finally, they decided to bring a plane from Newark to Washington Dulles Of course the original flight was at 10:45 PM so by the time the plane got there it was 12:30 AM. It had not been cleaned. It had not been catered. They don’t really have people available to do those things when it’s not pre-programmed at 1 o’clock in the morning. The crew had to be changed And the new plane held 28 fewer people than the scheduled plane There is no way you can hate United Airlines enough The people at the gate were actually just fine, but it was management who was completely useless And did they send extra help to the people at the gate? Did they send supervisors? Of course not. Just don’t take United find somebody else or buy a boat

Read the fine print. This was my flight home. I booked my flight for the quickest way home. Had a carry-on and a personal item. Same as my outbound flight. Apparently I needed to pre-pay extra for my carry-on. When I checked in, I was told that I had to check it. I said I’ll pay for it, and was told that this wasn’t an option anymore. They said I still had to pay $50 to check my carry-on. I told them I’ll pay whatever to just carry it in as intended. I was not allowed, so eventually I paid $50 to check my carry-on under a plane that was half full, with overhead compartments that were even less full. My white carry-on suitcase was practically destroyed getting from Idaho falls to Denver to Orange County. The low price air fair was a bait and switch. Got me to the gate, made me pay extra, then didn’t even allow me to pay for a carry on. Not to mention that I paid the $8 for WiFi that didn’t work. All to get my suitcase destroyed. I don’t think I’m going to even keep my Untied mileage plus membership and card. Apparently, membership does not have its privileges for this one.

MY FAMILY'S LUGGAGE WAS LOST FROM ROME TO BARI. I WAS THE ONLY ONE THAT RECEIVED MY LUGGAGE FROM ROME TO BARI. AFTER DEPLANING IN BARI, WE WASTED A LOT OF TIME AT BAG CLAIMS LOST AND FOUND REPORTING THE CLAIM AND PLEADING FOR THE BAGS TO BE DELIVERED THE NEXT DAY. WE WERE TOLD THAT IT TAKES 3 DAYS MINIMUM TO DELIVER. MY DAUGHTER AND MY GIRLFRIEND NEEDED THEIR PERSONAL THINGS AND WE WERE STAYING 3 HOURS AWAY FROM THE BARI AIRPORT. WE HAD TO DRIVE 3 HOURS TO THE AIRPORT TO COLLECT OUR LOST LUGGAGE THE NEXT DAY. WE ARE NOT HAPPY WITH THE EXPERIENCE

Our flight to Rome, Italy was cancelled the day of and we were never informed. We only found out because I was trying to get into my husbands account and called to get his account number. Had to pay more for worse seating on another airline.

We were a little disappointed to not be able to complete check in online without uploading pics of passports. Also we have KTN's and they weren't on our boarding passes when we got to security. Had to trek back to counter to have them fix.

Excellent service in Polaris class IAD to ZRH. Arrived rested and well fed after the overnight flight.

It's a short hop. My carryon was checked at the gate, I didn't have to drag it all over the airport. Excellent wheelchair assist.

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

Information on your arrival and departure airports