What is the cheapest airline to fly from Washington, D.C. Reagan-National Airport to Idaho Falls round-trip?

American Airlines, at $480, was found to be the cheapest airline from Washington, D.C. Reagan-National Airport to Idaho Falls..

In terms of precipitation, rainfall in Idaho Falls ranges from 0.6 - 2.0 inches per month. May is typically the wettest month, when rainfall can reach 2.0 in. July is typically the driest time to visit Idaho Falls when rainfall is around 0.6 in.

If weather is an important factor for your trip to Idaho Falls, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 69.8 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 23.0 F).

What is the cheapest time of day to fly from DCA to IDA?

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Washington, D.C. Reagan-National Airport to Idaho Falls as you normally would.

Most accurate provider : When it comes to deals on Washington, D.C. Reagan-National Airport-Idaho Falls flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Washington, D.C. Reagan-National Airport-Idaho Falls flight deals on Cheapflights vs. eDreams >95% of the time. Price accuracy is based on data collected from Washington, D.C. Reagan-National Airport-Idaho Falls flight searches over the past month and is updated monthly.

Most trusted provider : When it comes to deals on Washington, D.C. Reagan-National Airport-Idaho Falls flights, Cheapflights users trust eDreams the most. eDreams has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Washington, D.C. Reagan-National Airport-Idaho Falls flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

What airport do you fly into for flights to Idaho Falls from Washington, D.C. Reagan-National?

For a flight from Washington, D.C. Reagan-National to Idaho Falls, you will be flying into Fanning Field. Idaho Falls Fanning Field (IDA) is just 3.8 mi from the center of the city. Fanning Field is the only Idaho Falls airport and it handles 0 inbound flights from Washington, D.C. Reagan-National per day. 1 airline has flights to Idaho Falls Fanning Field from Washington, D.C. Reagan-National on a regular basis.

Can I find deals for flights from Reagan-National to Idaho Falls that include hotel bookings?

Yes. In addition to deals on Reagan-National to Idaho Falls flights, Cheapflights offers vacation packages that include both flights and hotel.

How can I find direct flights from Reagan-National to Idaho Falls?

After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Reagan-National to Idaho Falls.

Can I find deals for business class flights from Reagan-National to Idaho Falls?

Yes. Cheapflights offers flight deals from Reagan-National to Idaho Falls by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

$364+ Flights from Washington, D.C. Reagan-National Airport to Idaho Falls

Home Search by date Vacation packages Hotels Flight deals Car rental Travel tips & news

Find cheap flights from Reagan-National to Idaho Falls with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheap flight deals from Reagan-National to Idaho Falls

Cheapest flights from Reagan-National to Idaho Falls
Explore the most affordable flight options available from Reagan-National to Idaho Falls. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 12, 2025.

Mon 12/224:17 pmDCA - IDA

1 stop6h 57mUnited Airlines

Mon 12/295:00 amIDA - DCA

1 stop7h 59mUnited Airlines

Deal found 12/10

$714

Fri 12/191:44 pmDCA - IDA

2 stops10h 37mAmerican Airlines

Thu 1/17:00 amIDA - DCA

2 stops11h 55mAmerican Airlines

Deal found 12/11

$834

Sat 12/204:17 pmDCA - IDA

1 stop6h 57mUnited Airlines

Mon 12/295:00 amIDA - DCA

1 stop7h 59mUnited Airlines

Deal found 12/11

$929

Fri 12/191:44 pmDCA - IDA

2 stops10h 37mAmerican Airlines

Tue 12/301:16 pmIDA - DCA

1 stop7h 43mAmerican Airlines

Deal found 12/11

$959

Sat 12/274:17 pmDCA - IDA

1 stop6h 57mUnited Airlines

Wed 12/315:00 amIDA - DCA

1 stop7h 59mUnited Airlines

Deal found 12/10

$1,006

Mon 12/294:17 pmDCA - IDA

1 stop8h 42mUnited Airlines

Mon 1/55:00 amIDA - DCA

1 stop7h 59mUnited Airlines

Deal found 12/10

$1,013

Best flights from Reagan-National to Idaho Falls
Discover carefully curated flight deals from Reagan-National to Idaho Falls that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated December 12, 2025.

Sat 1/248:00 amDCA - IDA

1 stop16h 59mAlaska Airlines

Wed 1/286:58 pmIDA - DCA

1 stop25h 01mAlaska Airlines

Deal found 12/9

$364

Tue 3/105:12 pmDCA - IDA

1 stop7h 08mDelta

Mon 3/166:59 pmIDA - DCA

2 stops12h 11mDelta

Deal found 12/11

$407

Sat 2/146:30 amDCA - IDA

1 stop9h 00mAmerican Airlines

Sat 2/216:42 amIDA - DCA

2 stops11h 10mAmerican Airlines

Deal found 12/9

$452

Wed 2/188:00 amDCA - IDA

1 stop17h 36mAlaska Airlines

Fri 2/278:00 amIDA - DCA

1 stop11h 59mAlaska Airlines

Deal found 12/11

$415

Mon 3/93:10 pmDCA - IDA

2 stops9h 10mDelta

Mon 3/166:59 pmIDA - DCA

2 stops12h 11mDelta

Deal found 12/11

$425

Mon 3/95:12 pmDCA - IDA

1 stop7h 08mDelta

Wed 3/186:59 pmIDA - DCA

2 stops25h 37mDelta

Deal found 12/11

$439

Tue 3/108:00 amDCA - IDA

1 stop17h 36mAlaska Airlines

Wed 3/188:00 amIDA - DCA

1 stop30h 17mAlaska Airlines

Deal found 12/11

$453

Mon 3/93:10 pmDCA - IDA

2 stops9h 10mDelta

Tue 3/176:59 pmIDA - DCA

2 stops18h 24mDelta

Deal found 12/11

$444

Last-minute flights from Reagan-National to Idaho Falls
Discover last-minute flight deals from Reagan-National to Idaho Falls. Data last updated December 12, 2025 and is based on user searches.

Mon 12/224:17 pmDCA - IDA

1 stop6h 57mUnited Airlines

Mon 12/295:00 amIDA - DCA

1 stop7h 59mUnited Airlines

Deal found 12/10

$714

Mon 1/54:17 pmDCA - IDA

1 stop8h 42mUnited Airlines

Sat 1/104:19 pmIDA - DCA

2 stops14h 13mUnited Airlines

Deal found 12/11

$649

Sat 1/248:00 amDCA - IDA

1 stop16h 59mAlaska Airlines

Wed 1/286:58 pmIDA - DCA

1 stop25h 01mAlaska Airlines

Deal found 12/9

$364

Sat 1/246:30 amDCA - IDA

3 stops16h 46mUnited Airlines

Wed 1/286:30 amIDA - DCA

1 stop6h 29mUnited Airlines

Deal found 12/10

$613

Find flight deals from Reagan-National to Idaho Falls

Most accurate provider	eDreams 3 stars
Most trusted provider	eDreams 3 stars
Round-trip from	$364 (Alaska Airlines)
Popular in	March
Cheapest in	January
Average price	$504

Provider with most accurate pricing for Washington, D.C. Reagan-National-Idaho Falls Fanning Field flight deals.

Search Deals

Provider most trusted by Cheapflights users for Washington, D.C. Reagan-National-Idaho Falls Fanning Field flights.

Search Deals

From Washington, D.C. Reagan-National to Idaho Falls Fanning Field

Search Deals

Highest demand for flights based on searches. 10% potential increase in price ($65 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 2% potential price decrease ($14 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in December 2025

Search Deals

Cheapflights Fare Finder

Use the filters below to find and compare flights from Washington, D.C. Reagan-National Airport to Idaho Falls that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Washington, D.C.Idaho Falls

DCA - IDA

DCAIDA

Washington, D.C. Reagan-National

Sat 1/24

8:00 am-10:59 pm

1 stop16h 59m

Idaho Falls Fanning Field

Wed 1/28

6:58 pm-9:59 pm

1 stop25h 01m

$364

Washington, D.C.Idaho Falls

DCA - IDA

DCAIDA

Washington, D.C. Reagan-National

Tue 3/10

5:12 pm-10:20 pm

1 stop7h 08m

Idaho Falls Fanning Field

Mon 3/16

6:59 pm-9:10 am

2 stops12h 11m

$407

Washington, D.C.Idaho Falls

DCA - IDA

DCAIDA

Washington, D.C. Reagan-National

Wed 2/18

8:00 am-11:36 pm

1 stop17h 36m

Idaho Falls Fanning Field

Fri 2/27

8:00 am-9:59 pm

1 stop11h 59m

$415

Washington, D.C.Idaho Falls

DCA - IDA

DCAIDA

Washington, D.C. Reagan-National

Mon 3/9

3:10 pm-10:20 pm

2 stops9h 10m

Idaho Falls Fanning Field

Mon 3/16

6:59 pm-9:10 am

2 stops12h 11m

$425

Washington, D.C.Idaho Falls

DCA - IDA

DCAIDA

Washington, D.C. Reagan-National

Mon 3/9

5:12 pm-10:20 pm

1 stop7h 08m

Idaho Falls Fanning Field

Wed 3/18

6:59 pm-10:36 pm

2 stops25h 37m

$439

Washington, D.C.Idaho Falls

DCA - IDA

DCAIDA

Washington, D.C. Reagan-National

Mon 3/9

3:10 pm-10:20 pm

2 stops9h 10m

Idaho Falls Fanning Field

Tue 3/17

6:59 pm-3:23 pm

2 stops18h 24m

$444

Washington, D.C.Idaho Falls

DCA - IDA

DCAIDA

Washington, D.C. Reagan-National

Sat 2/14

6:30 am-1:30 pm

1 stop9h 00m

Idaho Falls Fanning Field

Sat 2/21

6:42 am-7:52 pm

2 stops11h 10m

$452

Washington, D.C.Idaho Falls

DCA - IDA

DCAIDA

Washington, D.C. Reagan-National

Tue 3/10

8:00 am-11:36 pm

1 stop17h 36m

Idaho Falls Fanning Field

Wed 3/18

8:00 am-4:17 pm

1 stop30h 17m

$453

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/9

Compare providers for flights from Reagan-National to Idaho Falls

Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Reagan-National to Idaho Falls in December.

Provider	Price Accuracy	Trust Score*
Expedia	Price Accuracy2 stars	Trust Score*3 stars
FlightHub	Price Accuracy3 stars	Trust Score*1 star
eDreams	Price Accuracy3 stars	Trust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

Most accurate provider: When it comes to deals on Washington, D.C. Reagan-National Airport-Idaho Falls flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Washington, D.C. Reagan-National Airport-Idaho Falls flight deals on Cheapflights vs. eDreams >95% of the time. Price accuracy is based on data collected from Washington, D.C. Reagan-National Airport-Idaho Falls flight searches over the past month and is updated monthly.
Most trusted provider: When it comes to deals on Washington, D.C. Reagan-National Airport-Idaho Falls flights, Cheapflights users trust eDreams the most. eDreams has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Washington, D.C. Reagan-National Airport-Idaho Falls flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Reagan-National to Idaho Falls

Have a flexible travel schedule? Discover the best time to fly to Idaho Falls from Reagan-National with our price prediction graph.

Estimated round-trip price

Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Washington, D.C. Reagan-National Airport to Idaho Falls

What is the cheapest month to book a flight from Washington, D.C. Reagan-National Airport to Idaho Falls?

Currently, November is the cheapest month in which you can book a flight from Washington, D.C. Reagan-National Airport to Idaho Falls (average of $310). Flying from Washington, D.C. Reagan-National Airport to Idaho Falls in May is currently the most expensive (average of $704). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

Reviews of airlines servicing Idaho Falls

See what other customers who have flown with American Airlines from Washington, D.C. Reagan-National Airport to Idaho Falls have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.

American Airlines

7.2

Good

11,050 reviews

Reviews

1 / 20

10.0

Excellent

Jeremy,Dec 2025

OKC - CLT

Was an okay flight. Had extra seat empty beside me so was able to stretch a bit

American Airlines

7.2

Good

11,050 reviews

American Airlines

7.2

Good

11,050 reviews

Reviews

1 / 20

10.0

Excellent

Jeremy,Dec 2025

OKC - CLT

Was an okay flight. Had extra seat empty beside me so was able to stretch a bit

Related info for your journey

What airport do you fly into for flights to Idaho Falls from Washington, D.C. Reagan-National?
For a flight from Washington, D.C. Reagan-National to Idaho Falls, you will be flying into Fanning Field. Idaho Falls Fanning Field (IDA) is just 3.8 mi from the center of the city. Fanning Field is the only Idaho Falls airport and it handles 0 inbound flights from Washington, D.C. Reagan-National per day. 1 airline has flights to Idaho Falls Fanning Field from Washington, D.C. Reagan-National on a regular basis.
How long is the flight from Washington, D.C. Reagan-National Airport to Idaho Falls?
Departing from Washington, D.C. Reagan-National Airport to Idaho Falls will take you 7h 08m. The distance from Washington, D.C. Reagan-National Airport to Idaho Falls is about 1835 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.
What is the cheapest airline to fly from Washington, D.C. Reagan-National Airport to Idaho Falls round-trip?
American Airlines, at $480, was found to be the cheapest airline from Washington, D.C. Reagan-National Airport to Idaho Falls..
Can I find deals for flights from Reagan-National to Idaho Falls that include hotel bookings?
Yes. In addition to deals on Reagan-National to Idaho Falls flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from Reagan-National to Idaho Falls?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Reagan-National to Idaho Falls.
Can I find deals for business class flights from Reagan-National to Idaho Falls?
Yes. Cheapflights offers flight deals from Reagan-National to Idaho Falls by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.
What is the cheapest month to book a flight from Washington, D.C. Reagan-National Airport to Idaho Falls?
Currently, November is the cheapest month in which you can book a flight from Washington, D.C. Reagan-National Airport to Idaho Falls (average of $310). Flying from Washington, D.C. Reagan-National Airport to Idaho Falls in May is currently the most expensive (average of $704). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Rexburg

Browse thousands of different options on Cheapflights for your next trip

Alternative routes for Reagan-National to Idaho Falls

Other flights to Idaho Falls

Portland to Idaho Falls flights

Las Vegas to Idaho Falls flights

Seattle to Idaho Falls flights

Denver to Idaho Falls flights

Dallas/Fort Worth to Idaho Falls flights

Idaho Falls to Las Vegas flights

Idaho Falls to Portland flights

Idaho Falls to Santa Ana, California flights

Idaho Falls to Las Vegas flights

Idaho Falls to Phoenix-Mesa Gateway Airport flights

Idaho Falls to Santa Ana, California flights

Idaho Falls to Salt Lake City flights

Idaho Falls to Phoenix Sky Harbor Intl Airport flights

Idaho Falls to Seattle flights

Idaho Falls to Denver flights

Idaho Falls to Dallas/Fort Worth Airport flights

Idaho Falls to Denver flights

Idaho Falls to Salt Lake City flights

Idaho Falls to Phoenix Sky Harbor Intl Airport flights

Idaho Falls to Denver flights

Idaho Falls to Dallas/Fort Worth Airport flights

Other flights from Reagan-National

Reagan-National to Denver flights

Reagan-National to Orlando flights

Reagan-National to Boston flights

Reagan-National to LaGuardia flights

Reagan-National to Fort Lauderdale flights

Reagan-National to John F Kennedy Intl flights

Top airline flying from Reagan-National to Idaho Falls

Airline	Cheapest	Average	Flexibility	On-time
American Airlines	Cheapest$480	Average$571	FlexibilityNo cancel fee	On-time71%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.

$364+ Cheap flights from Reagan-National (DCA) to Idaho Falls (IDA)

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 1/24. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Reagan-National to Idaho Falls with Cheapflights

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

Cheap flight deals from Reagan-National to Idaho Falls

Cheapest flights from Reagan-National to Idaho FallsExplore the most affordable flight options available from Reagan-National to Idaho Falls. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 12, 2025.

Explore the most affordable flight options available from Reagan-National to Idaho Falls. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 12, 2025.

Find flight deals from Reagan-National to Idaho Falls

Most accurate provider

Most trusted provider

Round-trip from

Popular in

Cheapest in

Average price

Cheapflights Fare Finder

Use the filters below to find and compare flights from Washington, D.C. Reagan-National Airport to Idaho Falls that are best for you.

Compare providers for flights from Reagan-National to Idaho Falls

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.

Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Reagan-National to Idaho Falls in December.

Best time to book a flight from Reagan-National to Idaho Falls

Have a flexible travel schedule? Discover the best time to fly to Idaho Falls from Reagan-National with our price prediction graph.

Cheapflights Insights

Everything you need to know about your flight from Washington, D.C. Reagan-National Airport to Idaho Falls

What is the cheapest month to book a flight from Washington, D.C. Reagan-National Airport to Idaho Falls?

Reviews of airlines servicing Idaho Falls

See what other customers who have flown with American Airlines from Washington, D.C. Reagan-National Airport to Idaho Falls have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.

Related info for your journey

Find useful and relevant information for your journey from Reagan-National to Idaho Falls. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

What airport do you fly into for flights to Idaho Falls from Washington, D.C. Reagan-National?

How long is the flight from Washington, D.C. Reagan-National Airport to Idaho Falls?

What is the cheapest airline to fly from Washington, D.C. Reagan-National Airport to Idaho Falls round-trip?

Can I find deals for flights from Reagan-National to Idaho Falls that include hotel bookings?

How can I find direct flights from Reagan-National to Idaho Falls?

Can I find deals for business class flights from Reagan-National to Idaho Falls?

What is the cheapest month to book a flight from Washington, D.C. Reagan-National Airport to Idaho Falls?

Traveling to a place near Idaho Falls?

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Reagan-National to Idaho Falls

See prices for flight routes from nearby airports that may be better suited for you.

Top airline flying from Reagan-National to Idaho Falls

100% Free

Book with Flexibility

Travel Smart

Cheapest flights from Reagan-National to Idaho Falls
Explore the most affordable flight options available from Reagan-National to Idaho Falls. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 12, 2025.