IDA - IAD

$175 Find Cheap Flights from Idaho Falls to Washington Dulles Airport - 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 8/31. 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
$374
Delta
Tue 8/25Wed 8/26
IDA - IAD • 1 stop
Cheapest one-way
$175
Delta
Mon 8/31
IDA - IAD • 1 stop
Top airlines
Delta
Cheapest • from $374 (round-trip)
United Airlines
Best reviews • 7.4 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
Seattle (SEA)
Cheapest • Avg $447 (round-trip)
Denver (DEN)
Shortest trip • 6h 38m (one-way)
Insights
Insights
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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-IAD)

 
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.

Tue, Aug 25 - Wed, Aug 26
Delta Logo
3:17 pm - 11:39 pm
IDA
-
IAD
6h 22m
1 stop
Delta Logo
7:00 am - 2:35 pm
IAD
-
IDA
9h 35m
1 stop
$374Delta
Tue, Aug 25 - Wed, Aug 26
Delta Logo
3:17 pm - 11:39 pm
IDA
-
IAD
6h 22m
1 stop
Delta Logo
6:00 am - 2:35 pm
IAD
-
IDA
10h 35m
2 stops
$409Delta
Fri, Aug 28 - Sat, Aug 29
United Airlines Logo
4:04 pm - 12:32 am
IDA
-
IAD
6h 28m
1 stop
United Airlines Logo
6:15 am - 11:38 am
IAD
-
IDA
7h 23m
1 stop
$449United Airlines
Fri, Aug 28 - Sat, Aug 29
United Airlines Logo
2:25 pm - 7:14 am
IDA
-
IAD
14h 49m
2 stops
United Airlines Logo
10:10 am - 3:23 pm
IAD
-
IDA
7h 13m
1 stop
$454United Airlines
Fri, Aug 21 - Mon, Aug 24
American Airlines Logo
7:00 am - 6:27 pm
IDA
-
IAD
9h 27m
1 stop
American Airlines Logo
6:09 am - 1:50 pm
IAD
-
IDA
9h 41m
1 stop
$465American Airlines
Tue, Sep 22 - Fri, Sep 25
Delta Logo
6:57 pm - 11:45 am
IDA
-
IAD
14h 48m
2 stops
Delta Logo
8:00 am - 6:17 pm
IAD
-
IDA
12h 17m
2 stops
$469Delta
Tue, Aug 11 - Sat, Aug 15
Delta Logo
7:00 pm - 9:20 am
IDA
-
IAD
12h 20m
2 stops
Delta Logo
7:00 am - 2:35 pm
IAD
-
IDA
9h 35m
1 stop
$492Delta
Fri, Aug 21 - Mon, Aug 24
United Airlines Logo
4:04 pm - 12:32 am
IDA
-
IAD
6h 28m
1 stop
United Airlines Logo
6:30 am - 1:29 pm
IAD
-
IDA
8h 59m
1 stop
$509United Airlines
Thu, Dec 17 - Tue, Jan 5
Delta Logo
1:10 pm - 12:20 am
IDA
-
IAD
9h 10m
2 stops
Delta Logo
10:05 am - 6:14 pm
IAD
-
IDA
10h 09m
2 stops
$524Delta
Tue, Sep 22 - Fri, Sep 25
Alaska Airlines Logo
2:01 pm - 11:59 pm
IDA
-
IAD
7h 58m
1 stop
Alaska Airlines Logo
7:47 pm - 1:24 pm
IAD
-
IDA
19h 37m
2 stops
$545Alaska 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.

Which airlines provide the cheapest flights from Idaho Falls to Washington Dulles Airport?

The cheapest round-trip price for the route for each airline clicked by KAYAK users in the last 5 days.

In the past 5 days, the cheapest round-trip tickets from Idaho Falls to Washington Dulles Airport were found on Delta ($374) and United Airlines ($449).

Find deals

Good to know

Cheapest flight$175
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 Idaho Falls to Washington Dulles Airport flights

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

    In the last 5 days, the lowest price for a flight from Idaho Falls to Washington, D.C. Dulles Intl Airport was $175 for a one-way ticket and $374 for a round-trip.

  • Do I need a passport to fly between Idaho Falls and Washington Dulles Airport?

    A passport is not required to fly from Idaho Falls to Washington Dulles Airport.

  • Which aircraft models fly most regularly from Idaho Falls to Washington Dulles Airport?

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

  • Which airline alliances offer flights from Idaho Falls to Washington Dulles Airport?

    Star Alliance is the only airline alliance operating flights between Idaho Falls and Washington Dulles Airport.

  • How does KAYAK find such low prices on flights from Idaho Falls to Washington Dulles Airport?

    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 Dulles Airport.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Washington Dulles Airport 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 Dulles Airport?

    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 Dulles Airport with an airline and back to Idaho Falls with another airline. Booking your flights between Idaho Falls and IAD can sometimes prove cheaper using this method.

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

    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 Dulles Airport 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 airline 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.
7.4
United AirlinesOverall score based on 9927 reviews
7.7Boarding
7.1Entertainment
7.3Comfort
8.1Crew
6.7Food
Airline reviews

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

2.0 MediocreAnonymous, Jun 2026
TPA - IAD
Read more United Airlines reviews

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

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.

Was great in general, try to respect time and excuses when slight changes have been made, appreciated!

My bags were misplaced!!! Im in a foreign country with no bags

United is one airline which regardless of how many separate United tickets in existence, if one flight breaks down, the airline will take care of all the flights.

Fine not above and beyond as I had a connection that was delayed due to maintenance

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

Information on your arrival and departure airports

Idaho Falls (IDA)
Dulles Intl (IAD)