What are the cheapest airlines flying from Idaho Falls to Washington, D.C. round-trip?

United Airlines, at $395, was found to be the cheapest airline from Idaho Falls to Washington, D.C..Alternate airlines to your destination round-trip include Alaska Airlines and Delta. United Airlines is priced at 42% lower than the current average price of a flight leaving 3 months from now.

What are the cheapest airlines to fly from Idaho Falls to Washington, D.C. one-way?

$204 is the cheapest one-way deal found within the past few days, from Delta. You may also be able to find cheap deals on Alaska Airlines and United Airlines, with prices starting from $252 and $256, respectively.

What is the cheapest day to fly from Idaho Falls to Washington, D.C.?

Travelers seeking maximum savings on their Idaho Falls to Washington, D.C. flight should consider departing on Thursday at noon when fares are most often at their lowest. Friday mornings flights should be avoided if possible as fares are typically the most expensive at this time.

What are the most popular routes from Idaho Falls to Washington, D.C.?

When deciding which route to take from Idaho Falls to Washington, D.C. consider Idaho Falls Fanning Field - Washington, D.C. Dulles Intl, Idaho Falls Fanning Field - Washington, D.C. Reagan-National or Idaho Falls Fanning Field - Baltimore/Washington as they are the most popular.

What is the cheapest day to fly round-trip from Idaho Falls to Washington, D.C.?

Flights from Idaho Falls to Washington, D.C. are found to be more expensive on Wednesday. This shouldn't discourage you from searching as you can still find great deals by being flexible with your options. Use our search form to find deals on tickets to Washington, D.C..

What is the cheapest month to fly from Idaho Falls to Washington, D.C.?

October is one of the best times of the year to fly to Washington, D.C. from Idaho Falls. Prices for October average $687 per person but you can even find prices for as low as $550. The most expensive prices can be found in the month of March. Opting for a October flight can save you 24% on your journey compared to booking in March

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

Most trusted provider : When it comes to deals on Idaho Falls-Washington, D.C. flights, Cheapflights users trust FlightHub the most. FlightHub 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 Idaho Falls-Washington, D.C. flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

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

Located just 3.8 mi from the city center, Idaho Falls Fanning Field is the airport most travelers will use when flying to Washington, D.C. from Idaho Falls. Booking flights from Fanning Field (IDA) to Washington, D.C. should be relatively easy as there are 0 daily outbound flights to Washington, D.C. from 3 different airlines.

Can I find deals for flights from Idaho Falls to Washington, D.C. that include hotel bookings?

Yes. In addition to deals on Idaho Falls to Washington, D.C. flights, Cheapflights offers vacation packages that include both flights and hotel.

How can I find direct flights from Idaho Falls to Washington, D.C.?

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

Can I find deals for business class flights from Idaho Falls to Washington, D.C.?

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

$204+ Save on Flights from Idaho Falls to Washington, D.C.

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Cheap flight deals from Idaho Falls to Washington, D.C.

Most accurate provider	FlightHub 3 stars
Most trusted provider	FlightHub 3 stars
Round-trip from	$395 (United Airlines)
One-way from	$204 (Delta)
Popular in	March
Cheapest in	October
Average price	$853

Provider with most accurate pricing for Idaho Falls Fanning Field-Washington, D.C. (WAS) flight deals.

Search Deals

Provider most trusted by Cheapflights users for Idaho Falls Fanning Field-Washington, D.C. (WAS) flights.

Search Deals

From Idaho Falls Fanning Field to Washington, D.C. (WAS)

Search Deals

One-way flight from Idaho Falls Fanning Field to Washington, D.C. (WAS)

Search Deals

Highest demand for flights based on searches. 13% potential increase in price ($102 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 2% potential price decrease ($19 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in March 2025

Search Deals

Find flight deals from Idaho Falls to Washington, D.C.

Cheapest flights from Idaho Falls to Washington, D.C.
Explore the most affordable flight options available from Idaho Falls to Washington, D.C.. Find the lowest fares from popular airlines and budget airlines, with prices last updated on March 25, 2025.

Fri 5/210:53 amIDA - IAD

1 stop8h 32mUnited Airlines

Sun 5/45:35 pmIAD - IDA

1 stop7h 10mUnited Airlines

Deal found 3/24

$395

Thu 4/246:00 amIDA - IAD

1 stop16h 23mAlaska Airlines

Mon 4/287:13 pmIAD - IDA

1 stop22h 45mAlaska Airlines

Deal found 3/24

$454

Fri 5/25:00 amIDA - DCA

1 stop8h 02mUnited Airlines

Sun 5/44:16 pmDCA - IDA

1 stop8h 29mUnited Airlines

Deal found 3/24

$461

Fri 5/22:40 pmIDA - BWI

1 stop6h 37mUnited Airlines

Sun 5/44:10 pmBWI - IDA

1 stop8h 35mUnited Airlines

Deal found 3/24

$466

Tue 5/1312:30 pmIDA - IAD

1 stop8h 58mDelta

Sat 5/177:30 amIAD - IDA

1 stop6h 41mDelta

Deal found 3/24

$480

Fri 5/27:43 amIDA - DCA

2 stops12h 20mAmerican Airlines

Sun 5/45:00 amDCA - IDA

1 stop9h 29mAmerican Airlines

Deal found 3/24

$492

Tue 5/136:50 pmIDA - BWI

1 stop8h 50mDelta

Sat 5/176:55 amBWI - IDA

1 stop7h 16mDelta

Deal found 3/24

$558

Fri 5/306:00 amIDA - BWI

1 stop10h 05mAlaska Airlines

Sun 6/17:49 amBWI - IDA

1 stop9h 51mAlaska Airlines

Deal found 3/24

$560

Fri 5/27:43 amIDA - BWI

2 stops12h 36mAmerican Airlines

Sun 5/45:00 amBWI - IDA

2 stops9h 29mAmerican Airlines

Deal found 3/24

$583

Fri 5/306:00 amIDA - DCA

1 stop13h 59mAlaska Airlines

Sun 6/18:00 amDCA - IDA

1 stop9h 40mAlaska Airlines

Deal found 3/24

$610

Mon 5/126:00 amIDA - IAD

1 stop10h 13mHawaiian Airlines

Fri 5/166:30 amIAD - IDA

1 stop11h 10mHawaiian Airlines

Deal found 3/23

$699

Sat 5/316:00 amIDA - DCA

1 stop8h 44mHawaiian Airlines

Thu 6/58:00 amDCA - IDA

1 stop9h 40mHawaiian Airlines

Deal found 3/24

$699

Best flights from Idaho Falls to Washington, D.C.
Discover carefully curated flight deals from Idaho Falls to Washington, D.C. that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated March 25, 2025.

Fri 5/210:53 amIDA - IAD

1 stop8h 32mUnited Airlines

Sun 5/45:35 pmIAD - IDA

1 stop7h 10mUnited Airlines

Deal found 3/24

$395

Thu 4/246:00 amIDA - IAD

1 stop16h 23mAlaska Airlines

Mon 4/287:13 pmIAD - IDA

1 stop22h 45mAlaska Airlines

Deal found 3/24

$454

Tue 5/1312:30 pmIDA - IAD

1 stop8h 58mDelta

Sat 5/177:30 amIAD - IDA

1 stop6h 41mDelta

Deal found 3/24

$480

Fri 5/27:43 amIDA - DCA

2 stops12h 20mAmerican Airlines

Sun 5/45:00 amDCA - IDA

1 stop9h 29mAmerican Airlines

Deal found 3/24

$492

Mon 5/126:00 amIDA - IAD

1 stop10h 13mHawaiian Airlines

Fri 5/166:30 amIAD - IDA

1 stop11h 10mHawaiian Airlines

Deal found 3/23

$699

Fri 5/25:00 amIDA - DCA

1 stop8h 02mUnited Airlines

Sun 5/44:16 pmDCA - IDA

1 stop8h 29mUnited Airlines

Deal found 3/24

$461

Fri 5/22:40 pmIDA - BWI

1 stop6h 37mUnited Airlines

Sun 5/44:10 pmBWI - IDA

1 stop8h 35mUnited Airlines

Deal found 3/24

$466

Tue 5/136:50 pmIDA - BWI

1 stop8h 50mDelta

Sat 5/176:55 amBWI - IDA

1 stop7h 16mDelta

Deal found 3/24

$558

Fri 5/306:00 amIDA - BWI

1 stop10h 05mAlaska Airlines

Sun 6/17:49 amBWI - IDA

1 stop9h 51mAlaska Airlines

Deal found 3/24

$560

Fri 5/27:43 amIDA - BWI

2 stops12h 36mAmerican Airlines

Sun 5/45:00 amBWI - IDA

2 stops9h 29mAmerican Airlines

Deal found 3/24

$583

Fri 5/306:00 amIDA - DCA

1 stop13h 59mAlaska Airlines

Sun 6/18:00 amDCA - IDA

1 stop9h 40mAlaska Airlines

Deal found 3/24

$610

Sat 5/316:00 amIDA - DCA

1 stop8h 44mHawaiian Airlines

Thu 6/58:00 amDCA - IDA

1 stop9h 40mHawaiian Airlines

Deal found 3/24

$699

Last-minute flights from Idaho Falls to Washington, D.C.
Discover last-minute flight deals from Idaho Falls to Washington, D.C.. Data last updated March 25, 2025 and is based on user searches.

Mon 4/710:50 amIDA - IAD

1 stop8h 34mUnited Airlines

Thu 4/1010:20 pmIAD - IDA

1 stop24h 47mUnited Airlines

Deal found 3/24

$640

Mon 4/712:59 pmIDA - DCA

1 stop8h 01mAmerican Airlines

Fri 4/1111:54 amDCA - IDA

2 stops12h 16mAmerican Airlines

Deal found 3/24

$686

Mon 4/712:59 pmIDA - BWI

2 stops9h 25mAmerican Airlines

Thu 4/1010:45 amBWI - IDA

2 stops13h 25mAmerican Airlines

Deal found 3/24

$737

Mon 4/710:50 amIDA - BWI

1 stop10h 40mUnited Airlines

Thu 4/1010:00 amBWI - IDA

1 stop7h 21mUnited Airlines

Deal found 3/24

$762

Mon 4/74:15 pmIDA - DCA

1 stop20h 46mUnited Airlines

Fri 4/114:15 pmDCA - IDA

1 stop19h 17mUnited Airlines

Deal found 3/24

$849

Thu 4/246:00 amIDA - IAD

1 stop16h 23mAlaska Airlines

Mon 4/287:13 pmIAD - IDA

1 stop22h 45mAlaska Airlines

Deal found 3/24

$454

One-way flights from Idaho Falls to Washington, D.C.
Search for one-way flight options from Idaho Falls to Washington, D.C.. Find affordable one-way fares based on user searches. Data last updated March 25, 2025.

Fri 5/166:50 pmIDA - BWI

1 stop8h 50mDelta

Deal found 3/24

$204

Sat 5/314:20 pmIDA - BWI

1 stop12h 09mAlaska Airlines

Deal found 3/24

$252

Tue 4/88:00 amIDA - IAD

1 stop7h 59mAlaska Airlines

Deal found 3/24

$255

Mon 4/710:50 amIDA - IAD

1 stop8h 34mUnited Airlines

Deal found 3/24

$256

Mon 4/72:20 pmIDA - BWI

1 stop7h 10mUnited Airlines

Deal found 3/24

$256

Mon 4/712:59 pmIDA - DCA

1 stop8h 01mAmerican Airlines

Deal found 3/24

$256

Mon 4/76:55 pmIDA - IAD

2 stops12h 26mDelta

Deal found 3/24

$261

Mon 4/76:55 pmIDA - DCA

2 stops13h 39mDelta

Deal found 3/24

$261

Tue 4/86:50 amIDA - DCA

1 stop6h 11mUnited Airlines

Deal found 3/24

$301

Wed 4/97:43 amIDA - IAD

2 stops9h 58mAmerican Airlines

Deal found 3/24

$306

Wed 4/97:43 amIDA - BWI

2 stops12h 36mAmerican Airlines

Deal found 3/24

$306

Sat 5/316:00 amIDA - DCA

2 stops12h 59mAlaska Airlines

Deal found 3/24

$307

Cheapflights Fare Finder

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

Fly from

Fly to

Route

Depart

Return

Price

Idaho FallsWashington, D.C.

IDA - IAD

IDAIAD

Idaho Falls Fanning Field

Fri 5/2

10:53 am-9:25 pm

1 stop8h 32m

Washington, D.C. Dulles Intl

Sun 5/4

5:35 pm-10:45 pm

1 stop7h 10m

$395

Idaho FallsWashington, D.C.

IDA - IAD

IDAIAD

Idaho Falls Fanning Field

Thu 4/24

6:00 am-12:23 am

1 stop16h 23m

Washington, D.C. Dulles Intl

Mon 4/28

7:13 pm-3:58 pm

1 stop22h 45m

$454

Idaho FallsWashington, D.C.

IDA - DCA

IDADCA

Idaho Falls Fanning Field

Fri 5/2

5:00 am-3:02 pm

1 stop8h 02m

Washington, D.C. Reagan-National

Sun 5/4

4:16 pm-10:45 pm

1 stop8h 29m

$461

Idaho FallsBaltimore

IDA - BWI

IDABWI

Idaho Falls Fanning Field

Fri 5/2

2:40 pm-11:17 pm

1 stop6h 37m

Baltimore/Washington

Sun 5/4

4:10 pm-10:45 pm

1 stop8h 35m

$466

Idaho FallsWashington, D.C.

IDA - IAD

IDAIAD

Idaho Falls Fanning Field

Tue 5/13

12:30 pm-11:28 pm

1 stop8h 58m

Washington, D.C. Dulles Intl

Sat 5/17

7:30 am-12:11 pm

1 stop6h 41m

$480

Idaho FallsWashington, D.C.

IDA - DCA

IDADCA

Idaho Falls Fanning Field

Fri 5/2

7:43 am-10:03 pm

2 stops12h 20m

Washington, D.C. Reagan-National

Sun 5/4

5:00 am-12:29 pm

1 stop9h 29m

$492

Idaho FallsBaltimore

IDA - BWI

IDABWI

Idaho Falls Fanning Field

Tue 5/13

6:50 pm-5:40 am

1 stop8h 50m

Baltimore/Washington

Sat 5/17

6:55 am-12:11 pm

1 stop7h 16m

$558

Idaho FallsBaltimore

IDA - BWI

IDABWI

Idaho Falls Fanning Field

Fri 5/30

6:00 am-6:05 pm

1 stop10h 05m

Baltimore/Washington

Sun 6/1

7:49 am-3:40 pm

1 stop9h 51m

$560

Idaho FallsBaltimore

IDA - BWI

IDABWI

Idaho Falls Fanning Field

Fri 5/2

7:43 am-10:19 pm

2 stops12h 36m

Baltimore/Washington

Sun 5/4

5:00 am-12:29 pm

2 stops9h 29m

$583

Idaho FallsWashington, D.C.

IDA - DCA

IDADCA

Idaho Falls Fanning Field

Fri 5/30

6:00 am-9:59 pm

1 stop13h 59m

Washington, D.C. Reagan-National

Sun 6/1

8:00 am-3:40 pm

1 stop9h 40m

$610

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/24

Showing 1-10 of 25 results

Compare providers for flights from Idaho Falls to Washington, D.C.

Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Idaho Falls to Washington, D.C. in March.

Provider	Price Accuracy	Trust Score*
Expedia	Price Accuracy1 star	Trust Score*3 stars
FlightHub	Price Accuracy3 stars	Trust Score*3 stars
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 Idaho Falls-Washington, D.C. flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Idaho Falls-Washington, D.C. flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Idaho Falls-Washington, D.C. flight searches over the past month and is updated monthly.
Most trusted provider: When it comes to deals on Idaho Falls-Washington, D.C. flights, Cheapflights users trust FlightHub the most. FlightHub 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 Idaho Falls-Washington, D.C. 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 Idaho Falls to Washington, D.C.

Have a flexible travel schedule? Discover the best time to fly to Washington, D.C. from Idaho Falls 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 Idaho Falls to Washington, D.C.

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

Currently, August is the cheapest month in which you can book a flight from Idaho Falls to Washington, D.C. (average of $309). Flying from Idaho Falls to Washington, D.C. in June is currently the most expensive (average of $387). 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.

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

One of the essential ways to save on airfare from Idaho Falls to Washington, D.C. is to remain as flexible as possible. Flights that are in the afternoon tend to be the most expensive. A flight at noon could potentially save you up to 9% on airfare.

Rainfall in Washington, D.C. by month

In terms of precipitation, rainfall in Washington, D.C. ranges from 2.6 - 4.0 inches per month. May is typically the wettest month, when rainfall can reach 4.0 in. February is typically the driest time to visit Washington, D.C. when rainfall is around 2.6 in.

Temperature in Washington, D.C. by month

If weather is an important factor for your trip to Washington, D.C., 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 80.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 35.6 F).

Reviews of airlines servicing Washington, D.C.

To help decide which airline to fly from Idaho Falls to Washington, D.C., see what other customers have to say about Alaska Airlines, Delta and Hawaiian Airlines. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.

Alaska Airlines

8.0

Very good

9,785 reviews

Reviews

1 / 20

10.0

Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them

Alaska Airlines

8.0

Very good

9,785 reviews

Alaska Airlines

8.0

Very good

9,785 reviews

Reviews

1 / 20

10.0

Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them

Delta

8.0

Very good

7,890 reviews

Alaska Airlines

8.0

Very good

9,785 reviews

Reviews

1 / 20

10.0

Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them

Hawaiian Airlines

7.9

Good

2,330 reviews

Alaska Airlines

8.0

Very good

9,785 reviews

Reviews

1 / 20

10.0

Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them

United Airlines

7.4

Good

8,605 reviews

Alaska Airlines

8.0

Very good

9,785 reviews

Reviews

1 / 20

10.0

Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them

American Airlines

7.2

Good

10,000 reviews

Alaska Airlines

8.0

Very good

9,785 reviews

Reviews

1 / 20

10.0

Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them

Related info for your journey

What airport do you fly from for flights from Idaho Falls to Washington, D.C.?
Located just 3.8 mi from the city center, Idaho Falls Fanning Field is the airport most travelers will use when flying to Washington, D.C. from Idaho Falls. Booking flights from Fanning Field (IDA) to Washington, D.C. should be relatively easy as there are 0 daily outbound flights to Washington, D.C. from 3 different airlines.
What are the cheapest airlines flying from Idaho Falls to Washington, D.C. round-trip?
United Airlines, at $395, was found to be the cheapest airline from Idaho Falls to Washington, D.C..Alternate airlines to your destination round-trip include Alaska Airlines and Delta. United Airlines is priced at 42% lower than the current average price of a flight leaving 3 months from now.
What are the cheapest airlines to fly from Idaho Falls to Washington, D.C. one-way?
$204 is the cheapest one-way deal found within the past few days, from Delta. You may also be able to find cheap deals on Alaska Airlines and United Airlines, with prices starting from $252 and $256, respectively.
What are the most popular routes from Idaho Falls to Washington, D.C.?
When deciding which route to take from Idaho Falls to Washington, D.C. consider Idaho Falls Fanning Field - Washington, D.C. Dulles Intl, Idaho Falls Fanning Field - Washington, D.C. Reagan-National or Idaho Falls Fanning Field - Baltimore/Washington as they are the most popular.
Can I find deals for flights from Idaho Falls to Washington, D.C. that include hotel bookings?
Yes. In addition to deals on Idaho Falls to Washington, D.C. flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from Idaho Falls to Washington, D.C.?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Idaho Falls to Washington, D.C..
Can I find deals for business class flights from Idaho Falls to Washington, D.C.?
Yes. Cheapflights offers flight deals from Idaho Falls to Washington, D.C. 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 Idaho Falls to Washington, D.C.?
Currently, August is the cheapest month in which you can book a flight from Idaho Falls to Washington, D.C. (average of $309). Flying from Idaho Falls to Washington, D.C. in June is currently the most expensive (average of $387). 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

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Springfield

Rockville

Woodbridge

Gaithersburg

Fredericksburg

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Silver Spring

Falls Church

Laurel

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Oxon Hill

Reston

Browse thousands of different options on Cheapflights for your next trip

Top 3 airlines flying from Idaho Falls to Washington, D.C.

Airline	Cheapest	Average	Flexibility	On-time
Delta	Cheapest$338	Average$509	FlexibilityNo cancel fee	On-timeN/A
American Airlines	Cheapest$369	Average$733	FlexibilityNo cancel fee	On-time71%
United Airlines	Cheapest$394	Average$765	FlexibilityNo cancel fee	On-time69%

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$204+ Cheap flights from Idaho Falls (IDA) to Washington, D.C. (WAS)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 5/16. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Idaho Falls to Washington, D.C. with Cheapflights

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

Cheap flight deals from Idaho Falls to Washington, D.C.

Most accurate provider

Most trusted provider

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Find flight deals from Idaho Falls to Washington, D.C.

Cheapest flights from Idaho Falls to Washington, D.C.Explore the most affordable flight options available from Idaho Falls to Washington, D.C.. Find the lowest fares from popular airlines and budget airlines, with prices last updated on March 25, 2025.

Explore the most affordable flight options available from Idaho Falls to Washington, D.C.. Find the lowest fares from popular airlines and budget airlines, with prices last updated on March 25, 2025.

Cheapflights Fare Finder

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

Compare providers for flights from Idaho Falls to Washington, D.C.

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 Idaho Falls to Washington, D.C. in March.

Best time to book a flight from Idaho Falls to Washington, D.C.

Have a flexible travel schedule? Discover the best time to fly to Washington, D.C. from Idaho Falls with our price prediction graph.

Cheapflights Insights

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

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

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

Find hourly flight availability from Idaho Falls to Washington, D.C.. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated March 25, 2025.

Rainfall in Washington, D.C. by month

Plan your trip to Washington, D.C. by taking into account the average rainfall totals by month.

Temperature in Washington, D.C. by month

Plan your trip to Washington, D.C. by taking into account the average temperature totals by month.

Reviews of airlines servicing Washington, D.C.

To help decide which airline to fly from Idaho Falls to Washington, D.C., see what other customers have to say about Alaska Airlines, Delta and Hawaiian Airlines. You can also see how each airline stacks up 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 Idaho Falls to Washington, D.C.. 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 from for flights from Idaho Falls to Washington, D.C.?

What are the cheapest airlines flying from Idaho Falls to Washington, D.C. round-trip?

What are the cheapest airlines to fly from Idaho Falls to Washington, D.C. one-way?

What are the most popular routes from Idaho Falls to Washington, D.C.?

Can I find deals for flights from Idaho Falls to Washington, D.C. that include hotel bookings?

How can I find direct flights from Idaho Falls to Washington, D.C.?

Can I find deals for business class flights from Idaho Falls to Washington, D.C.?

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

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Alternative routes for Idaho Falls to Washington, D.C.

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Top 3 airlines flying from Idaho Falls to Washington, D.C.

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Cheapest flights from Idaho Falls to Washington, D.C.
Explore the most affordable flight options available from Idaho Falls to Washington, D.C.. Find the lowest fares from popular airlines and budget airlines, with prices last updated on March 25, 2025.