IAD - IDA

$290 Find Cheap Flights from Washington, D.C. to Idaho Falls

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 Idaho Falls departing on 8/5. 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 Idaho Falls

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

Cheapest round-trip
$410
United Airlines
Sun 9/20Wed 9/30
IAD - IDA • 1 stop
Cheapest one-way
$306
American Airlines
Wed 8/5
IAD - IDA • 1 stop
Top airlines
Cheapest • from $410 (round-trip)
Best reviews • 7.9 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
Nonstop flights
Not available
There are currently no direct flights between Washington, D.C. and Idaho Falls. You'll need at least 1 connection.
Insights
Insights
Insights
Insights
Top layover airports
Cheapest • Avg $599 (round-trip)
Shortest trip • 7h 59m (one-way)
Insights
Insights
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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 Idaho Falls!
Flight Deals
Booking Insights
Flight Deals

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

 
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 Falls 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 Falls

Sun, Sep 20 - Wed, Sep 30
United Airlines Logo
6:30 am - 1:29 pm
IAD
-
IDA
8h 59m
1 stop
United Airlines Logo
10:35 am - 7:26 pm
IDA
-
IAD
6h 51m
1 stop
$410United Airlines
Mon, Aug 10 - Thu, Aug 20
United Airlines Logo
6:30 am - 1:25 pm
IAD
-
IDA
8h 55m
1 stop
United Airlines Logo
4:04 pm - 12:32 am
IDA
-
IAD
6h 28m
1 stop
$469United Airlines
Mon, Aug 10 - Thu, Aug 20
Multiple Airlines Logo
9:50 am - 4:05 pm
IAD
-
IDA
8h 15m
1 stop
Multiple Airlines Logo
7:54 pm - 6:04 pm
IDA
-
IAD
20h 10m
2 stops
$493Multiple Airlines
Sat, May 30 - Wed, Jun 3
United Airlines Logo
6:10 am - 11:45 am
IAD
-
IDA
7h 35m
1 stop
United Airlines Logo
2:30 pm - 11:32 pm
IDA
-
IAD
7h 02m
1 stop
$499United Airlines
Fri, May 29 - Tue, Jun 2
Delta Logo
11:15 am - 10:42 pm
IAD
-
IDA
13h 27m
2 stops
Delta Logo
6:54 pm - 9:16 am
IDA
-
IAD
12h 22m
2 stops
$509Delta
Tue, Jun 2 - Fri, Jun 5
Delta Logo
12:37 pm - 10:42 pm
IAD
-
IDA
12h 05m
2 stops
Delta Logo
6:54 pm - 9:48 am
IDA
-
IAD
12h 54m
2 stops
$510Delta
Tue, Jun 2 - Fri, Jun 5
United Airlines Logo
6:30 am - 1:25 pm
IAD
-
IDA
8h 55m
1 stop
United Airlines Logo
4:10 pm - 12:45 am
IDA
-
IAD
6h 35m
1 stop
$514United Airlines
Fri, May 29 - Tue, Jun 2
United Airlines Logo
6:30 am - 1:25 pm
IAD
-
IDA
8h 55m
1 stop
United Airlines Logo
2:30 pm - 11:32 pm
IDA
-
IAD
7h 02m
1 stop
$524United Airlines
Tue, Jul 7 - Tue, Jul 14
Alaska Airlines Logo
7:49 pm - 10:39 pm
IAD
-
IDA
28h 50m
2 stops
Alaska Airlines Logo
7:15 am - 5:11 pm
IDA
-
IAD
7h 56m
1 stop
$525Alaska Airlines
Fri, May 29 - Tue, Jun 2
American Airlines Logo
6:18 am - 12:14 pm
IAD
-
IDA
7h 56m
1 stop
American Airlines Logo
12:44 pm - 12:13 am
IDA
-
IAD
9h 29m
2 stops
$529American Airlines
Booking Insights

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

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

Which airlines provide the cheapest flights from Washington, D.C. to Idaho Falls?

The cheapest round-trip price for the route for each airline clicked by KAYAK users in the last 72 hours.

In the past 3 days, the cheapest round-trip tickets from Washington, D.C. to Idaho Falls were found on United Airlines ($410) and Delta ($509).

Good to know

Cheapest flight$290
Flight from Washington, D.C. to Idaho Falls

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

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

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

    In the last 3 days, the lowest price for a flight from Washington, D.C. Dulles Intl Airport to Idaho Falls was $306 for a one-way ticket and $410 for a round-trip.

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

    A passport is not required to fly from Washington, D.C. to Idaho Falls.

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

    When flying out of Washington, D.C. you will be using Washington, D.C. Dulles Intl. You will be landing at Idaho Falls, also known as Idaho Falls Fanning Field.

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

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

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

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

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

    The two airlines most popular with KAYAK users for flights from Washington, D.C. to Idaho Falls are Alaska Airlines and United Airlines. With an average price for the route of $708 and an overall rating of 7.9, Alaska Airlines is the most popular choice. United Airlines is also a great choice for the route, with an average price of $581 and an overall rating of 7.4.

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

    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 Idaho Falls.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Idaho Falls 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 Idaho Falls?

    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 Idaho Falls with an airline and back to Washington, D.C. with another airline. Booking your flights between Washington, D.C. and IDA 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 Washington, D.C. to Idaho Falls?

    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 Idaho Falls 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 airlines flying from Washington, D.C. to Idaho Falls

 
See real verified KAYAK customer reviews for airlines flying from Washington, D.C. to Idaho Falls. 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 Idaho Falls? 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.
7.9
Alaska AirlinesOverall score based on 12378 reviews
7.8Comfort
8.5Crew
7.0Food
7.0Entertainment
8.1Boarding
Airline reviews

It departed an hour and a half late because the crew got in late the previous night due to weather related problems. So we got into LA later than anticipated and traffic was much worse.

6.0 GoodAnonymous, May 2026
DCA - LAX
Read more Alaska Airlines reviews

It departed an hour and a half late because the crew got in late the previous night due to weather related problems. So we got into LA later than anticipated and traffic was much worse.

Good. I didn’t order food and there was no entertainment available.

The crew was great and everything went smoothly coming and going.

It was not a good experience, the flight was delayed 3 hours, the gate staff were super pushy to get bags checked claiming it was a full flight, there were about a dozen open seats from what I could tell. The intercom from the pilot seemed to be broken, it sounded like the pilot was speaking with a mouth full of marbles.

The food was terrible, worse that what you get with UA, an already one of the lowest standards to beat. How cheap one could be, providing that kind of junk food in first class. Unbelievable! The seats were not very comfortable either. And there were no screens either, not that I cared much but for you to know.

The aircraft was extremely warm the entire flight. After we landed we were stuck on the plane for another 45 minutes without a gate to deboard from. The smell of exhaust from the engines in the cabin along with the heat inside the cabin made the flight uncomfortable.

Flight cancelled and deplaned. Rescheduled 8 hours later at a different airport. Ended up at destination but late.

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.

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.

Did not like that we couldn't complete check in on-line without providing pictures of our passports. Worry about identity theft. We had no delays and boarding was handled In an efficient manner.

Excellent! I got to Munich and was transferred to my Lufthansa flight quickly, in 15 to 20 minutes, so I did not miss my flight. However, I had checked my overhead bag at the boarding gate in Tampa. That got to Tunis the next day. That is to be expected.

WiFi didn’t exist , seats were super cramped, lights stayed on near my seat for a long time while others were dimmed, the food/trash/drink cart hit my shoulder at least a couple of times while moving, food options were down to just one option by the time it got to my row, the utensils were garbage (knife bent at a couple of places by the time I was done eating) the spoon was very flimsy plastic

Vegetarian selection could be better. Bread was too hard to chew.

Crew was friendly and competent. Food, wine, and entertainment were excellent except the raw tuna on the flight to Split. Recommend against serving that - at least as the only option. Many medical conditions do not allow people to eat raw fish.

United didn’t even try to hold the flight for me. They knew I had a tight connection and when I arrived at the gate less than 10 mins after final boarding the flight had already gone. The gate agent wasn’t even notified that I was on my way. She was told I wasn’t at the airport

Good quick flight on a small but comfortable plane. I'm 6'3 and had plenty of space.

The flight was delayed so we were dead tired, and after that the turbulence was horrible. I was very scared.

Wifi took a while to kick in and we had a maintenance issue that took over 40 mins at the gate in Washington before pulling back

Very good. Because of the delays with my previous flight, I missed my connection, but I was able to book another flight through the United app easily.

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

Information on your arrival and departure airports