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

Alaska Airlines, at $390, was found to be the cheapest airline from Idaho Falls to Washington, D.C..Alternate airlines to your destination round-trip include American Airlines and Hawaiian Airlines.

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

$261 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 American Airlines, with prices starting from $338 and $356, 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.

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.

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).

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. Reagan-National, Idaho Falls Fanning Field - Washington, D.C. Dulles Intl 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 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.

$180+ Flights from Idaho Falls to Washington, D.C.

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

Round-trip from	$390 (Alaska Airlines)
One-way from	$180 (Mytrip)

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

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 July 3, 2025.

Mon 8/253:54 pmIDA - IAD

1 stop13h 38mAlaska Airlines

Wed 8/277:00 amIAD - IDA

1 stop10h 17mAlaska Airlines

Deal found 6/30

$390

Mon 8/2512:46 pmIDA - DCA

1 stop9h 04mAmerican Airlines

Wed 8/276:59 amDCA - IDA

1 stop8h 01mAmerican Airlines

Deal found 6/30

$391

Sat 10/41:35 pmIDA - IAD

1 stop7h 10mAmerican Airlines

Thu 10/96:11 amIAD - IDA

1 stop8h 30mAmerican Airlines

Deal found 7/2

$395

Mon 8/253:54 pmIDA - BWI

1 stop11h 39mAlaska Airlines

Wed 8/277:00 amBWI - IDA

1 stop10h 17mAlaska Airlines

Deal found 6/30

$400

Wed 9/176:51 pmIDA - BWI

1 stop9h 09mDelta

Mon 9/227:15 amBWI - IDA

1 stop7h 11mDelta

Deal found 7/1

$401

Mon 8/255:41 pmIDA - BWI

2 stops13h 29mMultiple Airlines

Wed 8/272:30 pmBWI - IDA

3 stops28h 36mMultiple Airlines

Deal found 6/30

$405

Wed 9/246:44 amIDA - BWI

2 stops13h 02mAmerican Airlines

Mon 9/296:41 amBWI - IDA

1 stop8h 18mAmerican Airlines

Deal found 7/1

$431

Mon 8/256:00 amIDA - DCA

2 stops11h 35mDelta

Wed 8/273:40 pmDCA - IDA

2 stops8h 47mDelta

Deal found 6/30

$433

Fri 7/254:13 pmIDA - IAD

1 stop6h 32mUnited Airlines

Fri 8/156:30 amIAD - IDA

1 stop9h 02mUnited Airlines

Deal found 7/3

$447

Mon 8/253:00 pmIDA - IAD

2 stops12h 55mDelta

Wed 8/276:00 amIAD - IDA

2 stops10h 19mDelta

Deal found 6/30

$495

Thu 8/215:56 pmIDA - BWI

1 stop9h 25mUnited Airlines

Fri 9/124:20 pmBWI - IDA

1 stop8h 28mUnited Airlines

Deal found 6/30

$516

Sat 10/46:13 amIDA - DCA

2 stops13h 01mAlaska Airlines

Thu 10/98:59 amDCA - IDA

2 stops15h 39mAlaska Airlines

Deal found 7/2

$556

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 July 3, 2025.

Mon 8/253:54 pmIDA - IAD

1 stop13h 38mAlaska Airlines

Wed 8/277:00 amIAD - IDA

1 stop10h 17mAlaska Airlines

Deal found 6/30

$390

Mon 8/2512:46 pmIDA - DCA

1 stop9h 04mAmerican Airlines

Wed 8/276:59 amDCA - IDA

1 stop8h 01mAmerican Airlines

Deal found 6/30

$391

Wed 9/176:13 amIDA - IAD

1 stop8h 56mHawaiian Airlines

Mon 9/229:00 amIAD - IDA

1 stop8h 20mHawaiian Airlines

Deal found 7/1

$394

Wed 9/176:51 pmIDA - BWI

1 stop9h 09mDelta

Mon 9/227:15 amBWI - IDA

1 stop7h 11mDelta

Deal found 7/1

$401

Mon 8/255:41 pmIDA - BWI

2 stops13h 29mMultiple Airlines

Wed 8/272:30 pmBWI - IDA

3 stops28h 36mMultiple Airlines

Deal found 6/30

$405

Fri 7/254:13 pmIDA - IAD

1 stop6h 32mUnited Airlines

Fri 8/156:30 amIAD - IDA

1 stop9h 02mUnited Airlines

Deal found 7/3

$447

Sat 10/41:35 pmIDA - IAD

1 stop7h 10mAmerican Airlines

Thu 10/96:11 amIAD - IDA

1 stop8h 30mAmerican Airlines

Deal found 7/2

$395

Mon 8/253:54 pmIDA - BWI

1 stop11h 39mAlaska Airlines

Wed 8/277:00 amBWI - IDA

1 stop10h 17mAlaska Airlines

Deal found 6/30

$400

Mon 8/256:00 amIDA - DCA

2 stops11h 35mDelta

Wed 8/273:40 pmDCA - IDA

2 stops8h 47mDelta

Deal found 6/30

$433

Wed 9/246:44 amIDA - BWI

2 stops13h 02mAmerican Airlines

Mon 9/296:41 amBWI - IDA

1 stop8h 18mAmerican Airlines

Deal found 7/1

$431

Thu 8/215:56 pmIDA - BWI

1 stop9h 25mUnited Airlines

Fri 9/124:20 pmBWI - IDA

1 stop8h 28mUnited Airlines

Deal found 6/30

$516

Mon 8/253:00 pmIDA - IAD

2 stops12h 55mDelta

Wed 8/276:00 amIAD - IDA

2 stops10h 19mDelta

Deal found 6/30

$495

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 July 3, 2025 and is based on user searches.

Fri 7/111:47 pmIDA - DCA

1 stop7h 13mAmerican Airlines

Mon 7/141:37 pmDCA - IDA

1 stop9h 58mAmerican Airlines

Deal found 7/2

$561

Wed 7/166:15 amIDA - DCA

2 stops13h 27mAlaska Airlines

Tue 7/229:59 amDCA - IDA

2 stops14h 40mAlaska Airlines

Deal found 7/1

$711

Fri 7/254:13 pmIDA - IAD

1 stop6h 32mUnited Airlines

Fri 8/156:30 amIAD - IDA

1 stop9h 02mUnited Airlines

Deal found 7/3

$447

Thu 8/215:56 pmIDA - BWI

1 stop9h 25mUnited Airlines

Fri 9/124:20 pmBWI - IDA

1 stop8h 28mUnited Airlines

Deal found 6/30

$516

Fri 8/2212:46 pmIDA - IAD

2 stops8h 10mAmerican Airlines

Fri 9/126:25 amIAD - IDA

1 stop8h 34mAmerican Airlines

Deal found 7/3

$400

Fri 8/227:00 amIDA - BWI

2 stops14h 09mAmerican Airlines

Fri 9/1210:00 amBWI - IDA

2 stops13h 25mAmerican Airlines

Deal found 6/30

$439

Mon 8/253:54 pmIDA - IAD

1 stop13h 38mAlaska Airlines

Wed 8/277:00 amIAD - IDA

1 stop10h 17mAlaska Airlines

Deal found 6/30

$390

Mon 8/2512:46 pmIDA - DCA

1 stop9h 04mAmerican Airlines

Wed 8/276:59 amDCA - IDA

1 stop8h 01mAmerican Airlines

Deal found 6/30

$391

Mon 8/253:54 pmIDA - BWI

1 stop11h 39mAlaska Airlines

Wed 8/277:00 amBWI - IDA

1 stop10h 17mAlaska Airlines

Deal found 6/30

$400

Mon 8/255:41 pmIDA - BWI

2 stops13h 29mMultiple Airlines

Wed 8/272:30 pmBWI - IDA

3 stops28h 36mMultiple Airlines

Deal found 6/30

$405

Mon 8/256:00 amIDA - BWI

2 stops10h 52mDelta

Wed 8/277:15 amBWI - IDA

1 stop9h 04mDelta

Deal found 6/30

$406

Mon 8/253:00 pmIDA - IAD

1 stop6h 32mDelta

Wed 8/276:00 amIAD - IDA

2 stops10h 19mDelta

Deal found 6/30

$428

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 July 3, 2025.

Mon 7/287:23 pmIDA - BWI

3 stops32h 10mMultiple Airlines

Deal found 7/1

$180

Mon 7/285:04 pmIDA - IAD

2 stops16h 33mMultiple Airlines

Deal found 7/1

$228

Mon 7/286:52 pmIDA - DCA

2 stops11h 44mDelta

Deal found 7/1

$261

Mon 7/286:15 amIDA - IAD

1 stop23h 12mAlaska Airlines

Deal found 7/1

$338

Thu 12/181:44 pmIDA - DCA

1 stop9h 06mAmerican Airlines

Deal found 7/2

$356

Thu 12/181:44 pmIDA - IAD

1 stop6h 30mAmerican Airlines

Deal found 7/2

$381

Thu 12/181:44 pmIDA - BWI

1 stop6h 39mAmerican Airlines

Deal found 7/2

$386

Thu 12/186:05 amIDA - BWI

2 stops8h 54mDelta

Deal found 7/2

$436

Thu 12/186:05 amIDA - IAD

2 stops9h 51mDelta

Deal found 7/2

$445

Mon 7/286:15 amIDA - DCA

1 stop8h 28mHawaiian Airlines

Deal found 7/1

$499

Thu 12/187:00 amIDA - DCA

3 stops14h 45mUnited Airlines

Deal found 7/2

$743

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

Mon 8/25

3:54 pm-7:32 am

1 stop13h 38m

Washington, D.C. Dulles Intl

Wed 8/27

7:00 am-3:17 pm

1 stop10h 17m

$390

Idaho FallsWashington, D.C.

IDA - DCA

IDADCA

Idaho Falls Fanning Field

Mon 8/25

12:46 pm-11:50 pm

1 stop9h 04m

Washington, D.C. Reagan-National

Wed 8/27

6:59 am-1:00 pm

1 stop8h 01m

$391

Idaho FallsWashington, D.C.

IDA - IAD

IDAIAD

Idaho Falls Fanning Field

Wed 9/17

6:13 am-5:09 pm

1 stop8h 56m

Washington, D.C. Dulles Intl

Mon 9/22

9:00 am-3:20 pm

1 stop8h 20m

$394

Idaho FallsWashington, D.C.

IDA - IAD

IDAIAD

Idaho Falls Fanning Field

Sat 10/4

1:35 pm-10:45 pm

1 stop7h 10m

Washington, D.C. Dulles Intl

Thu 10/9

6:11 am-12:41 pm

1 stop8h 30m

$395

Idaho FallsBaltimore

IDA - BWI

IDABWI

Idaho Falls Fanning Field

Mon 8/25

3:54 pm-5:33 am

1 stop11h 39m

Baltimore/Washington

Wed 8/27

7:00 am-3:17 pm

1 stop10h 17m

$400

Idaho FallsBaltimore

IDA - BWI

IDABWI

Idaho Falls Fanning Field

Wed 9/17

6:51 pm-6:00 am

1 stop9h 09m

Baltimore/Washington

Mon 9/22

7:15 am-12:26 pm

1 stop7h 11m

$401

Idaho FallsBaltimore

IDA - BWI

IDABWI

Idaho Falls Fanning Field

Mon 8/25

5:41 pm-9:10 am

2 stops13h 29m

Baltimore/Washington

Wed 8/27

2:30 pm-5:06 pm

3 stops28h 36m

$405

Idaho FallsBaltimore

IDA - BWI

IDABWI

Idaho Falls Fanning Field

Wed 9/24

6:44 am-9:46 pm

2 stops13h 02m

Baltimore/Washington

Mon 9/29

6:41 am-12:59 pm

1 stop8h 18m

$431

Idaho FallsWashington, D.C.

IDA - DCA

IDADCA

Idaho Falls Fanning Field

Mon 8/25

6:00 am-7:35 pm

2 stops11h 35m

Washington, D.C. Reagan-National

Wed 8/27

3:40 pm-10:27 pm

2 stops8h 47m

$433

Idaho FallsWashington, D.C.

IDA - IAD

IDAIAD

Idaho Falls Fanning Field

Fri 7/25

4:13 pm-12:45 am

1 stop6h 32m

Washington, D.C. Dulles Intl

Fri 8/15

6:30 am-1:32 pm

1 stop9h 02m

$447

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/1

Showing 1-10 of 26 results

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 July is currently the most expensive (average of $345). 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.

Reviews of airlines servicing Washington, D.C.

Get a feel of what it's like to fly with Alaska Airlines, Delta, and Hawaiian Airlines from Idaho Falls to Washington, D.C. by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.

Alaska Airlines

8.0

Very good

10,000 reviews

Reviews

1 / 20

10.0

Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.

Alaska Airlines

8.0

Very good

10,000 reviews

Alaska Airlines

8.0

Very good

10,000 reviews

Reviews

1 / 20

10.0

Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.

Delta

8.0

Very good

7,982 reviews

Alaska Airlines

8.0

Very good

10,000 reviews

Reviews

1 / 20

10.0

Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.

Hawaiian Airlines

7.8

Good

2,545 reviews

Alaska Airlines

8.0

Very good

10,000 reviews

Reviews

1 / 20

10.0

Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.

United Airlines

7.4

Good

8,861 reviews

Alaska Airlines

8.0

Very good

10,000 reviews

Reviews

1 / 20

10.0

Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.

American Airlines

7.2

Good

10,000 reviews

Alaska Airlines

8.0

Very good

10,000 reviews

Reviews

1 / 20

10.0

Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.

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?
Alaska Airlines, at $390, was found to be the cheapest airline from Idaho Falls to Washington, D.C..Alternate airlines to your destination round-trip include American Airlines and Hawaiian Airlines.
What are the cheapest airlines to fly from Idaho Falls to Washington, D.C. one-way?
$261 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 American Airlines, with prices starting from $338 and $356, 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. Reagan-National, Idaho Falls Fanning Field - Washington, D.C. Dulles Intl 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 July is currently the most expensive (average of $345). 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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Gaithersburg

Fairfax

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Towson

Waldorf

Laurel

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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$426	FlexibilityNo cancel fee	On-timeN/A
American Airlines	Cheapest$369	Average$560	FlexibilityNo cancel fee	On-time71%
United Airlines	Cheapest$394	Average$720	FlexibilityNo cancel fee	On-time69%

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$180+ 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 7/28. 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

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

Round-trip from

One-way from

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 July 3, 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 July 3, 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.

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 July 3, 2025.

Reviews of airlines servicing Washington, D.C.

Get a feel of what it's like to fly with Alaska Airlines, Delta, and Hawaiian Airlines from Idaho Falls to Washington, D.C. by reading reviews from past customers. Users have also rated airlines 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.?

Traveling to a place near Idaho Falls?

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

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

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 July 3, 2025.