$175 Find Cheap Flights from Idaho Falls to District of Columbia - 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 District of Columbia departing on 9/9. 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 District of Columbia

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Idaho Falls to District of Columbia, 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 District of Columbia, as well as popular online travel agencies
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Flight Deals

Book Cheap Idaho Falls to District of Columbia Plane Tickets

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Idaho Falls to District of Columbia 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 District of Columbia

Tue, Oct 27 - Sat, Oct 31
Alaska Airlines Logo
6:09 am - 4:33 pm
IDA
-
IAD
8h 24m
1 stop
Alaska Airlines Logo
7:00 am - 3:35 pm
IAD
-
IDA
10h 35m
1 stop
$349Alaska Airlines
Sat, Oct 17 - Sat, Oct 24
American Airlines Logo
1:43 pm - 11:35 pm
IDA
-
DCA
7h 52m
1 stop
American Airlines Logo
6:59 am - 12:20 pm
DCA
-
IDA
7h 21m
1 stop
$349American Airlines
Thu, Aug 20 - Sun, Aug 23
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
$383United Airlines
Tue, Oct 27 - Sat, Oct 31
Alaska Airlines Logo
1:46 pm - 11:59 pm
IDA
-
IAD
8h 13m
1 stop
Alaska Airlines Logo
7:00 am - 3:35 pm
IAD
-
IDA
10h 35m
1 stop
$384Alaska Airlines
Mon, Oct 19 - Thu, Oct 22
Alaska Airlines Logo
1:46 pm - 11:59 pm
IDA
-
IAD
8h 13m
1 stop
Alaska Airlines Logo
7:00 am - 3:35 pm
IAD
-
IDA
10h 35m
1 stop
$399Alaska Airlines
Fri, Oct 30 - Thu, Nov 5
Delta Logo
6:00 am - 6:14 pm
IDA
-
DCA
10h 14m
2 stops
Delta Logo
10:00 am - 10:19 pm
DCA
-
IDA
14h 19m
2 stops
$409Delta
Sat, Oct 17 - Fri, Oct 23
United Airlines Logo
2:28 pm - 11:25 pm
IDA
-
IAD
6h 57m
1 stop
United Airlines Logo
6:35 am - 1:24 pm
IAD
-
IDA
8h 49m
1 stop
$418United Airlines
Fri, Oct 30 - Thu, Nov 5
American Airlines Logo
1:43 pm - 11:35 pm
IDA
-
DCA
7h 52m
1 stop
American Airlines Logo
6:30 am - 1:27 pm
DCA
-
IDA
8h 57m
1 stop
$434American Airlines
Fri, Oct 30 - Thu, Nov 5
Delta Logo
6:00 am - 4:17 pm
IDA
-
DCA
8h 17m
1 stop
Delta Logo
10:00 am - 10:19 pm
DCA
-
IDA
14h 19m
2 stops
$454Delta
Mon, Jul 27 - Sun, Sep 6
Multiple Airlines Logo
10:47 pm - 10:16 am
IDA
-
IAD
33h 29m
2 stops
Multiple Airlines Logo
9:20 am - 1:49 pm
IAD
-
IDA
30h 29m
1 stop
$487Multiple Airlines
Booking Insights

KAYAK's insights & trends for Idaho Falls to District of Columbia flights

Get data-powered insights and trends into flights from Idaho Falls to District of Columbia 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 District of Columbia?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Idaho Falls to District of Columbia, 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 District of Columbia is January, when tickets cost $0 (return) on average. On the other hand, the most expensive months are November and August, when the average cost of round-trip tickets is $715 and $470 respectively.

Good to know

Low seasonFebruary
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 13% lower on average.
Flight from Idaho Falls to Reagan Washington National Airport

FAQs - booking District of Columbia flights

  • How does KAYAK find such low prices on flights from Idaho Falls to District of Columbia?

    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 District of Columbia.

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

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

    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 from Idaho Falls to District of Columbia with an airline and back with another airline.

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

    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 from Idaho Falls to District of Columbia up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top 3 airlines serving from Idaho Falls to District of Columbia

 
See real verified KAYAK customer reviews for airlines flying from Idaho Falls to District of Columbia. 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 District of Columbia? 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
DeltaOverall score based on 8404 reviews
7.8Entertainment
8.1Boarding
7.8Comfort
8.5Crew
7.2Food
Airline reviews

Gate agent showed up 20 minutes before boarding and was not at all friendly. Had to take this flight due to the one on the day before being cancelled and any later options were already full with long standby lists. Despite having paid for Delta Comfort seats, Delta did not allow me (or anyone) to choose their seat. The agent assigned them for everyone just prior to boarding. Self seat selection was allowed on the original flight. Flight staff was great - very friendly.

2.0 MediocreAnonymous, Jun 2026
RDU - LGA
Read more Delta reviews

Gate agent showed up 20 minutes before boarding and was not at all friendly. Had to take this flight due to the one on the day before being cancelled and any later options were already full with long standby lists. Despite having paid for Delta Comfort seats, Delta did not allow me (or anyone) to choose their seat. The agent assigned them for everyone just prior to boarding. Self seat selection was allowed on the original flight. Flight staff was great - very friendly.

Flight attendants were great. Cheerful, upbeat and friendly. Jet, in particular, was fantastic.

I have Precheck. Flew HPN to DEN and return this past weekend. Delta didn't attach my Precheck number to this trip. So it was waiting in general line especially in Denver. Unavailable.

Original flight was delayed, then cancelled and the gate staff did not expedite rebooking. Also, no instructions were given that a ticket number was needed before being called to facilitate rebooking. This could have been much more organized.

Be on time? When not on time a circling for over an hour offer more than 1 bag of chips to the passengers? It was a 7 hour flight by the time we got done.

Five hour delays every hour, I wish it were all at once

Flight delayed four separate times. I’m now one hour hours late to landing.

worst flight ever from Delta, it got delayed and kept on delaying..

Should never have had to go to Detroit from Orlando back to Tennessee!

Got rerouted from a straight flight from Orlando to Atlanta to Knoxville to a flight from Orlando to Detroit to Knoxville! Seriously!! Flight delay out of Detroit! Long day for what should have been a pretty easy travel day!

Our flight was delayed 2.5 hours from Lisbon to DC so we missed our connection to Seattle that would have arrived at about 9 PM. The agent initially said we had to stay overnight in DC and there were no other options to put us on to get us to Seattle. While on board I discovered a flight via American he could have put us in but by the time we arrived in DC that was sold out. We were then put on a flight to San Francisco that was also delayed then arrived in San Francisco and our flight to Seattle was also delayed so we ended up not arriving until 2:15 am. Our son could not pick us up so we ended up having to pay over $100 to Uber home. This is the second trip with United that the flight has been delayed causing us to miss an evening in Las Vegas and we were given nothing.

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

There were no facilities in the middle of the aircraft and premium economy was not allowed to use the business class facilities, and had to share the only two toilets at the back with economy. The upgrade to Premium was definitely not worth it

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.

The economy seat was much less comfortable for an international flight in terms of recline and moving space when food tray is expanded. Per entertainment, it would be amazing if I could connect my Bluetooth headset or ear phones to the entertainment screen. Or provide in-flight wifi to connect directly from my own device.

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!

The airplane was an old model, the overhead didn’t have enough room for people’s items and made boarding and boarding disappointing and stressful. Crew allowed passengers to bring more than the permitted baggage sizes.

It was great. Smooth flight, comfortable, left on time and landed on time.

Horrible experience upon landing. Probably more due to DCA utter incompetence than AA.

Easy boarding. Rows are smaller but that may be an older and bigger me now :)

Flight has been delayed every time I've ever taken it. Seats uncomfortable. Children behind me yelling the entire flight. Some of this is out of their control but overall just consistently not a great experience.

Poor communication ahead of time about flight delays and old planes/other equipment.

Never going to fly your airline again if it can be avoided.

Not to have gotten delayed by 2+ hours for the fourth straight American flight. They're the worst.

Other than nearly three hour delay for maintenance issues, everything went smooth

Snow delayed boarding several times, which I understand happens. Issue I had was that after we did board, pilot told us we were going to roll out to be de-iced, then on our way. We were de-iced once, taxied to the tarmac and then stopped. Sat for another 30 minutes or so, the another de-icing. Then we rolled out to a parking spot, only to sit for another hour due to a traffic stop in DCA, which I'm confident they knew would happen before we boarded. Pilot gave no updates other than we had to hold, attendants did speak to the crew, but when asked, said the pilot would be updating us. We on the ground in the plane waiting for over 2 hours. They did communicate that bathrooms would be open, but no other news until we left. Would have been better to be up front about status.

Everything you need to know for your flight from Idaho Falls to District of Columbia

Information on your arrival and departure airports