IDA - WAS

$206 Find Cheap Flights from Idaho Falls to Washington, D.C.

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 9/24. 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

KAYAK searches hundreds of travel sites at once for deals on flights to Washington, D.C.

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

Mon, Dec 8 - Fri, Dec 12
 Logo
8:16 pm - 7:23 amIDA-BWI
9h 07m1 stop
 Logo
6:00 am - 11:59 amBWI-IDA
31h 59m2 stops
Mon, Dec 8 - Fri, Dec 12
 Logo
8:16 pm - 7:23 amIDA-BWI
9h 07m1 stop
 Logo
8:25 pm - 11:59 amBWI-IDA
17h 34m1 stop
Mon, Dec 8 - Fri, Dec 12
Alaska Airlines Logo
5:04 pm - 6:15 amIDA-IAD
11h 11m1 stop
Alaska Airlines Logo
7:35 am - 4:27 pmIAD-IDA
10h 52m1 stop
$414Alaska Airlines
Find Deal
Sat, Sep 27 - Tue, Sep 30
United Airlines Logo
8:30 am - 4:43 pmIDA-IAD
6h 13m1 stop
United Airlines Logo
2:45 pm - 8:52 pmIAD-IDA
8h 07m1 stop
$415United Airlines
Find Deal
Tue, Dec 9 - Thu, Dec 11
Alaska Airlines Logo
5:04 pm - 5:40 amIDA-BWI
10h 36m1 stop
Alaska Airlines Logo
7:00 am - 4:27 pmBWI-IDA
11h 27m1 stop
$415Alaska Airlines
Find Deal
Thu, Dec 25 - Mon, Jan 5
Delta Logo
5:55 am - 3:50 pmIDA-DCA
7h 55m1 stop
Delta Logo
5:15 pm - 10:21 pmDCA-IDA
7h 06m1 stop
$415Delta
Find Deal
Thu, Dec 25 - Tue, Dec 30
Delta Logo
5:55 am - 4:39 pmIDA-DCA
8h 44m2 stops
Delta Logo
5:00 pm - 10:57 pmDCA-IDA
7h 57m1 stop
$420Delta
Find Deal
Thu, Oct 23 - Mon, Oct 27
American Airlines Logo
12:55 pm - 10:53 pmIDA-BWI
7h 58m1 stop
American Airlines Logo
6:00 am - 12:25 pmBWI-IDA
8h 25m1 stop
$466American Airlines
Find Deal
Fri, Dec 12 - Sun, Dec 14
American Airlines Logo
1:58 pm - 10:59 pmIDA-IAD
7h 01m1 stop
American Airlines Logo
6:00 am - 1:27 pmIAD-IDA
9h 27m1 stop
$476American Airlines
Find Deal
Tue, Sep 16 - Thu, Sep 18
United Airlines Logo
5:00 am - 1:26 pmIDA-IAD
6h 26m1 stop
United Airlines Logo
12:35 pm - 5:15 pmIAD-IDA
6h 40m1 stop
$481United Airlines
Find Deal

Everything you should know

Top airlines
Alaska Airlines
Cheapest • from $414 (round-trip)
United Airlines
Best reviews • 7.4 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
Cheapest round-trip
$342
Typical prices: $512-752
Multiple Airlines
Mon 12/8Fri 12/12
IDA - BWI • 1 stop
Cheapest one-way
$206
United Airlines
Wed 9/24
IDA - BWI • 1 stop
Start a new search
KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to Washington, D.C.!
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’s the cheapest day of the week to fly from Idaho Falls to Washington, D.C.?

The average price of all round-trip flights from Idaho Falls to Washington, D.C. clicked on KAYAK for each day over the last 12 months.

Your flight ticket price will generally be cheaper if you fly to Washington, D.C. on a Wednesday and more expensive on a Friday. On your return trip to Idaho Falls, you should consider flying back on a Tuesday, and avoid Mondays for better deals.

Good to know

Cheapest flight$206
Flight from Idaho Falls to Baltimore

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 3 days, the lowest price for a flight from Idaho Falls to Washington, D.C. was $206 for a one-way ticket and $342 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.?

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

  • 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 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 8937 reviews
6.6Food
7.7Boarding
8.1Crew
7.1Entertainment
7.3Comfort
Airline reviews

IAD with the archaic people movers is just a place to be avoided.

10.0 ExcellentThomas, Aug 2025CMH - IAD
Read more United Airlines reviews

IAD with the archaic people movers is just a place to be avoided.

Overall, it was good. I was seating next to a wonderful lady and did not notice how time flew. Thanks

This is the best united airlines flight that I took. The crew was very friendly and the food was tasty!

It is clear that someone knew, and competent, is in charge of food at United Airlines at least for the international flights. I was flying in coach, but the choices of the dinner were excellent. Tasty, and appropriate size. I had the beef, which was a little bit like a shepherds pie, and it was good. Nothing comparable has been served on a United flight in years. It will not be confused with three star food, but it is very good for airline food. Even better was the breakfast choice between a cinnamon roll and a breakfast sandwich. I chose the breakfast sandwich which was absolutely delicious and which I would happily order again at my local Starbucks or Panera. It is clear that someone knew indifferent is in charge of the food and it’s about time.

Had one staff that was not pleasant. Seems they are stressed with too many people to care for.

I would have liked an opportunity to move to a different seat ( even would have checked in my hand luggage)as I had health issues where I didn't have to clamber over the passenger next to me to for toilet use/ movement [ She was a highly unpleasant neighbor to sit next to]. In addition, I found that my European phone plan had run out of data and so I was not receiving emails from yourselves on airport wifi to be able to check in online and verifications difficult as did not accept the ticket number I had. I asked for an extra blanket but was told there was none. Then I saw other passengers receiving them. I couldn't eat the food and asked for snacks : Stewardess said " on the way" but they did not bring. The best bit was the check in process in Lisbon. Very efficient. However, I did not understand why we had to collect our bags at Washington then go through customs again. It was not explained. I also with my leg and health issue had approximately mile walk to the gate ( which then changed) . There appeared to be no moving walkways or help provided.

The attendant were friendly. I suggest you have a medical attendant on board every flight so that in case someone is sick , he/she will help them.

We had a very long diversion and our food voucher didn’t work because the restaurants were closed

United airlines, mediocre at best. No issues , nothing great . Worked for me

Turbulent taking off & landing to Dulles from Raleigh. Flight from Dulles to Tokyo very good!!

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

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