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

One-way options have recently been found by users for as low as $119 on Frontier. Other airlines that offer cheap prices include Alaska Airlines from $135 and Hawaiian Airlines from $148 one-way.

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

When deciding which route to take from Idaho to Washington, D.C. consider Boise Air Term. Gowen Fld - Washington, D.C. Dulles Intl, Spokane - Washington, D.C. Dulles Intl or Boise Air Term. Gowen Fld - Washington, D.C. Reagan-National as they are the most popular.

What are the most popular airlines that fly from Idaho to Washington, D.C.?

Delta, Spirit Airlines and United Airlines are the most popular airlines when flying from Idaho to Washington, D.C..

How far in advance should I book a flight from Idaho to Washington, D.C.?

To save on the cost of your flight from Idaho to Washington, D.C., book at least 22 days before your planned departure. Booking around this time can save you about 263% on the cost of this flight compared to booking a flight leaving this week. We have found prices from $506 if you need a flight within two weeks. For flights within the next 72 hours, you can find tickets from as low as $1,051.

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

Our data shows that February tends to be the cheapest month to fly to Washington, D.C. from Idaho. Users have commonly found prices around $473 for the month, but tickets can be as low as $300. Due to multiple factors, prepare for potentially higher prices in March.

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

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

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

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

Yes. Cheapflights offers flight deals from Idaho 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.

$99+ Flights from Idaho to Washington, D.C.

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

Most accurate provider	FlightHub 3 stars
Most trusted provider	FlightHub 3 stars
Round-trip from	$228 (Gotogate)
One-way from	$99 (Mytrip)
Popular in	March
Cheapest in	February
Average price	$589

Provider with most accurate pricing for Boise Air Term. Gowen Fld-Washington, D.C. (WAS) flight deals.

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Provider most trusted by Cheapflights users for Boise Air Term. Gowen Fld-Washington, D.C. (WAS) flights.

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From Idaho to Washington, D.C. (WAS)

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

Search Deals

High demand for flights, 6% potential price rise

Search Deals

Cheapest flight prices on average. 2% potential price decrease ($11 potential savings vs. average RT price).

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Average for round-trip flights in March 2025

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

Cheapest flights from Idaho to Washington, D.C.
Explore the most affordable flight options available from Idaho to Washington, D.C.. Find the lowest fares from popular airlines and budget airlines, with prices last updated on March 31, 2025.

Mon 5/1212:16 pmBOI - BWI

1 stop15h 54mMultiple Airlines

Mon 5/196:12 pmBWI - BOI

1 stop21h 25mMultiple Airlines

Deal found 3/30

$228

Tue 4/296:30 amBOI - BWI

1 stop9h 35mAlaska Airlines

Tue 5/67:06 amBWI - BOI

1 stop10h 39mAlaska Airlines

Deal found 3/31

$252

Tue 4/291:23 pmBOI - BWI

1 stop7h 27mAmerican Airlines

Tue 5/63:29 pmBWI - BOI

1 stop8h 31mAmerican Airlines

Deal found 3/30

$279

Tue 4/293:30 pmBOI - BWI

1 stop6h 29mDelta

Tue 5/65:40 pmBWI - BOI

2 stops8h 23mDelta

Deal found 3/30

$284

Wed 5/287:07 pmBOI - BWI

1 stop8h 27mUnited Airlines

Fri 5/306:15 amBWI - BOI

1 stop11h 44mUnited Airlines

Deal found 3/30

$287

Thu 5/225:40 pmGEG - IAD

1 stop9h 12mDelta

Wed 5/287:45 amIAD - GEG

1 stop10h 05mDelta

Deal found 3/30

$297

Sat 4/262:15 pmGEG - DCA

1 stop6h 43mDelta

Sat 5/34:50 pmDCA - GEG

1 stop9h 00mDelta

Deal found 3/29

$297

Wed 4/232:15 pmGEG - BWI

1 stop6h 44mDelta

Wed 4/307:05 amBWI - GEG

1 stop8h 02mDelta

Deal found 3/30

$297

Sat 9/278:48 pmGEG - IAD

1 stop7h 44mAlaska Airlines

Sat 10/114:15 pmIAD - GEG

1 stop9h 18mAlaska Airlines

Deal found 3/31

$298

Wed 4/232:41 pmBOI - IAD

1 stop7h 17mAlaska Airlines

Sat 4/266:30 amIAD - BOI

2 stops13h 54mAlaska Airlines

Deal found 3/30

$300

Sun 4/2711:30 pmBOI - IAD

1 stop7h 48mDelta

Sun 5/47:25 amIAD - BOI

1 stop10h 35mDelta

Deal found 3/30

$301

Tue 9/165:40 amBOI - DCA

1 stop7h 55mDelta

Fri 9/194:40 pmDCA - BOI

1 stop9h 19mDelta

Deal found 3/31

$301

Best flights from Idaho to Washington, D.C.
Discover carefully curated flight deals from Idaho 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 31, 2025.

Mon 5/1212:16 pmBOI - BWI

1 stop15h 54mMultiple Airlines

Mon 5/196:12 pmBWI - BOI

1 stop21h 25mMultiple Airlines

Deal found 3/30

$228

Tue 4/296:30 amBOI - BWI

1 stop9h 35mAlaska Airlines

Tue 5/67:06 amBWI - BOI

1 stop10h 39mAlaska Airlines

Deal found 3/31

$252

Tue 4/291:23 pmBOI - BWI

1 stop7h 27mAmerican Airlines

Tue 5/63:29 pmBWI - BOI

1 stop8h 31mAmerican Airlines

Deal found 3/30

$279

Tue 4/293:30 pmBOI - BWI

1 stop6h 29mDelta

Tue 5/65:40 pmBWI - BOI

2 stops8h 23mDelta

Deal found 3/30

$284

Wed 5/287:07 pmBOI - BWI

1 stop8h 27mUnited Airlines

Fri 5/306:15 amBWI - BOI

1 stop11h 44mUnited Airlines

Deal found 3/30

$287

Sun 6/112:36 pmBOI - BWI

1 stop25h 49mFrontier

Sat 6/75:20 pmBWI - BOI

1 stop20h 27mFrontier

Deal found 3/31

$305

Sat 5/101:25 pmGEG - IAD

1 stop7h 33mHawaiian Airlines

Mon 5/195:14 pmIAD - GEG

1 stop9h 33mHawaiian Airlines

Deal found 3/31

$318

Thu 7/176:10 amGEG - IAD

1 stop7h 55mSouthwest

Mon 7/215:50 pmIAD - GEG

1 stop8h 10mSouthwest

Deal found 3/31

$328

Mon 4/141:52 pmBOI - BWI

2 stops26h 01mSpirit Airlines

Fri 4/186:51 amBWI - BOI

1 stop8h 06mSpirit Airlines

Deal found 3/30

$370

Thu 5/225:40 pmGEG - IAD

1 stop9h 12mDelta

Wed 5/287:45 amIAD - GEG

1 stop10h 05mDelta

Deal found 3/30

$297

Sat 9/278:48 pmGEG - IAD

1 stop7h 44mAlaska Airlines

Sat 10/114:15 pmIAD - GEG

1 stop9h 18mAlaska Airlines

Deal found 3/31

$298

Sat 4/262:15 pmGEG - DCA

1 stop6h 43mDelta

Sat 5/34:50 pmDCA - GEG

1 stop9h 00mDelta

Deal found 3/29

$297

Last-minute flights from Idaho to Washington, D.C.
Discover last-minute flight deals from Idaho to Washington, D.C.. Data last updated March 31, 2025 and is based on user searches.

Sat 4/55:30 amBOI - BWI

1 stop6h 20mDelta

Mon 4/143:43 pmBWI - BOI

2 stops10h 26mDelta

Deal found 3/30

$571

Sat 4/51:23 pmBOI - BWI

1 stop7h 13mAmerican Airlines

Mon 4/143:20 pmBWI - BOI

1 stop8h 51mAmerican Airlines

Deal found 3/30

$622

Sat 4/56:59 pmBOI - IAD

1 stop8h 41mAlaska Airlines

Mon 4/147:31 amIAD - BOI

1 stop17h 26mAlaska Airlines

Deal found 3/30

$662

Sat 4/58:08 amBOI - DCA

1 stop10h 51mAlaska Airlines

Mon 4/145:38 pmDCA - BOI

1 stop21h 37mAlaska Airlines

Deal found 3/30

$662

Sat 4/51:23 pmBOI - DCA

1 stop7h 36mAmerican Airlines

Mon 4/142:59 pmDCA - BOI

1 stop9h 12mAmerican Airlines

Deal found 3/31

$685

Mon 4/74:15 pmJAC - IAD

1 stop21h 17mUnited Airlines

Thu 4/1710:01 amIAD - JAC

1 stop7h 22mUnited Airlines

Deal found 3/31

$687

Thu 4/109:13 pmGEG - BWI

3 stops23h 53mMultiple Airlines

Wed 4/162:53 pmBWI - GEG

2 stops32h 30mMultiple Airlines

Deal found 3/30

$449

Thu 4/1012:53 pmJAC - IAD

1 stop7h 49mAmerican Airlines

Tue 4/226:18 amIAD - JAC

1 stop7h 55mAmerican Airlines

Deal found 3/30

$526

Thu 4/1012:53 pmJAC - BWI

1 stop7h 43mAmerican Airlines

Tue 4/226:05 amBWI - JAC

1 stop8h 08mAmerican Airlines

Deal found 3/30

$536

Thu 4/101:25 pmJAC - IAD

2 stops9h 03mDelta

Tue 4/2210:16 amIAD - JAC

2 stops10h 42mDelta

Deal found 3/30

$581

Thu 4/107:05 amJAC - BWI

2 stops8h 42mDelta

Tue 4/225:50 amBWI - JAC

2 stops12h 51mDelta

Deal found 3/30

$591

Thu 4/106:55 pmGEG - BWI

1 stop7h 53mDelta

Mon 4/142:04 pmBWI - GEG

2 stops12h 55mDelta

Deal found 3/30

$675

One-way flights from Idaho to Washington, D.C.
Search for one-way flight options from Idaho to Washington, D.C.. Find affordable one-way fares based on user searches. Data last updated March 31, 2025.

Fri 5/306:03 pmGEG - BWI

1 stop22h 36mMultiple Airlines

Deal found 3/31

$99

Tue 5/2012:26 pmGEG - DCA

1 stop6h 33mFrontier

Deal found 3/30

$119

Sat 5/34:00 pmGEG - IAD

1 stop10h 40mAlaska Airlines

Deal found 3/31

$135

Sat 5/109:38 amGEG - DCA

1 stop9h 21mAlaska Airlines

Deal found 3/30

$135

Sat 5/107:27 pmGEG - BWI

1 stop7h 19mAlaska Airlines

Deal found 3/30

$135

Tue 5/2712:36 pmBOI - DCA

1 stop7h 23mFrontier

Deal found 3/30

$146

Fri 5/25:00 amGEG - DCA

1 stop8h 38mHawaiian Airlines

Deal found 3/31

$148

Wed 6/255:35 pmGEG - IAD

1 stop9h 22mDelta

Deal found 3/31

$149

Thu 7/1011:55 amGEG - DCA

1 stop8h 33mDelta

Deal found 3/30

$149

Tue 6/107:05 pmGEG - BWI

1 stop7h 43mDelta

Deal found 3/31

$149

Sat 5/31:00 pmBOI - IAD

1 stop8h 58mHawaiian Airlines

Deal found 3/31

$150

Sat 5/39:18 amBOI - DCA

1 stop10h 41mHawaiian Airlines

Deal found 3/31

$150

Cheapflights Fare Finder

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

Fly from

Fly to

Route

Depart

Return

Price

BoiseBaltimore

BOI - BWI

BOIBWI

Boise Air Term. Gowen Fld

Mon 5/12

12:16 pm-6:10 am

1 stop15h 54m

Baltimore/Washington

Mon 5/19

6:12 pm-1:37 pm

1 stop21h 25m

$228

BoiseBaltimore

BOI - BWI

BOIBWI

Boise Air Term. Gowen Fld

Tue 4/29

6:30 am-6:05 pm

1 stop9h 35m

Baltimore/Washington

Tue 5/6

7:06 am-3:45 pm

1 stop10h 39m

$252

BoiseBaltimore

BOI - BWI

BOIBWI

Boise Air Term. Gowen Fld

Tue 4/29

1:23 pm-10:50 pm

1 stop7h 27m

Baltimore/Washington

Tue 5/6

3:29 pm-10:00 pm

1 stop8h 31m

$279

BoiseBaltimore

BOI - BWI

BOIBWI

Boise Air Term. Gowen Fld

Tue 4/29

3:30 pm-11:59 pm

1 stop6h 29m

Baltimore/Washington

Tue 5/6

5:40 pm-12:03 am

2 stops8h 23m

$284

BoiseBaltimore

BOI - BWI

BOIBWI

Boise Air Term. Gowen Fld

Wed 5/28

7:07 pm-5:34 am

1 stop8h 27m

Baltimore/Washington

Fri 5/30

6:15 am-3:59 pm

1 stop11h 44m

$287

SpokaneWashington, D.C.

GEG - IAD

GEGIAD

Spokane

Thu 5/22

5:40 pm-5:52 am

1 stop9h 12m

Washington, D.C. Dulles Intl

Wed 5/28

7:45 am-2:50 pm

1 stop10h 05m

$297

SpokaneWashington, D.C.

GEG - DCA

GEGDCA

Spokane

Sat 4/26

2:15 pm-11:58 pm

1 stop6h 43m

Washington, D.C. Reagan-National

Sat 5/3

4:50 pm-10:50 pm

1 stop9h 00m

$297

SpokaneBaltimore

GEG - BWI

GEGBWI

Spokane

Wed 4/23

2:15 pm-11:59 pm

1 stop6h 44m

Baltimore/Washington

Wed 4/30

7:05 am-12:07 pm

1 stop8h 02m

$297

SpokaneWashington, D.C.

GEG - IAD

GEGIAD

Spokane

Sat 9/27

8:48 pm-7:32 am

1 stop7h 44m

Washington, D.C. Dulles Intl

Sat 10/11

4:15 pm-10:33 pm

1 stop9h 18m

$298

BoiseWashington, D.C.

BOI - IAD

BOIIAD

Boise Air Term. Gowen Fld

Wed 4/23

2:41 pm-11:58 pm

1 stop7h 17m

Washington, D.C. Dulles Intl

Sat 4/26

6:30 am-6:24 pm

2 stops13h 54m

$300

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/30

Showing 1-10 of 60 results

...

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

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

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

Currently, August is the cheapest month in which you can book a flight from Idaho to Washington, D.C. (average of $241). Flying from Idaho to Washington, D.C. in March is currently the most expensive (average of $290). 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 ID to WAS?

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

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.

Peruse reviews from past customers who have flown with Alaska Airlines, Southwest and Delta from Idaho to Washington, D.C. to help guide your decision. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.

Alaska Airlines

8.0

Very good

9,818 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

9,818 reviews

Alaska Airlines

8.0

Very good

9,818 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

Southwest

8.0

Very good

4,276 reviews

Alaska Airlines

8.0

Very good

9,818 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

7,899 reviews

Alaska Airlines

8.0

Very good

9,818 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

2,342 reviews

Alaska Airlines

8.0

Very good

9,818 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

8,614 reviews

Alaska Airlines

8.0

Very good

9,818 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 are the cheapest airlines to fly from Idaho to Washington, D.C. one-way?
One-way options have recently been found by users for as low as $119 on Frontier. Other airlines that offer cheap prices include Alaska Airlines from $135 and Hawaiian Airlines from $148 one-way.
What are the most popular routes from Idaho to Washington, D.C.?
When deciding which route to take from Idaho to Washington, D.C. consider Boise Air Term. Gowen Fld - Washington, D.C. Dulles Intl, Spokane - Washington, D.C. Dulles Intl or Boise Air Term. Gowen Fld - Washington, D.C. Reagan-National as they are the most popular.
Can I find deals for flights from Idaho to Washington, D.C. that include hotel bookings?
Yes. In addition to deals on Idaho to Washington, D.C. flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from Idaho 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 to Washington, D.C..
Can I find deals for business class flights from Idaho to Washington, D.C.?
Yes. Cheapflights offers flight deals from Idaho 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 to Washington, D.C.?
Currently, August is the cheapest month in which you can book a flight from Idaho to Washington, D.C. (average of $241). Flying from Idaho to Washington, D.C. in March is currently the most expensive (average of $290). 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

Arlington

Alexandria

Fairfax

Tysons

Springfield

Rockville

Woodbridge

Gaithersburg

Fredericksburg

Linthicum Heights

Silver Spring

Falls Church

Laurel

Easton

Herndon

Bowie

Gettysburg

National Harbor

Oxon Hill

Reston

Browse thousands of different options on Cheapflights for your next trip

Top 6 airlines flying from Idaho to Washington, D.C.

Airline	Cheapest	Average	Flexibility	On-time
Spirit Airlines	Cheapest$141	Average$292	FlexibilityNo cancel fee	On-time65%
Alaska Airlines	Cheapest$192	Average$568	FlexibilityNo cancel fee	On-time75%
United Airlines	Cheapest$305	Average$708	FlexibilityNo cancel fee	On-time69%
Delta	Cheapest$306	Average$492	FlexibilityNo cancel fee	On-timeN/A
American Airlines	Cheapest$316	Average$633	FlexibilityNo cancel fee	On-time71%
Southwest	Cheapest$321	Average$450	FlexibilityNo cancel fee	On-time63%

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$99+ Cheap flights from Idaho 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 5/30. Fares are subject to change and may not be available on all flights or dates of travel.

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

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3. Compare prices and book

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

Keep the following information in mind while searching for Idaho to Washington, D.C. flight deals. Data was last updated March 31, 2025.

Most accurate provider

Most trusted provider

Round-trip from

One-way from

Popular in

Cheapest in

Average price

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

Cheapest flights from Idaho to Washington, D.C.Explore the most affordable flight options available from Idaho to Washington, D.C.. Find the lowest fares from popular airlines and budget airlines, with prices last updated on March 31, 2025.

Explore the most affordable flight options available from Idaho to Washington, D.C.. Find the lowest fares from popular airlines and budget airlines, with prices last updated on March 31, 2025.

Cheapflights Fare Finder

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

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

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

Cheapflights Insights

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

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

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

Find hourly flight availability from Idaho 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 31, 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.

Peruse reviews from past customers who have flown with Alaska Airlines, Southwest and Delta from Idaho to Washington, D.C. to help guide your decision. 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 Idaho 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 are the cheapest airlines to fly from Idaho to Washington, D.C. one-way?

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

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

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

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

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

Traveling to a place near Idaho?

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Alternative routes for Idaho to Washington, D.C.

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

Top 6 airlines flying from Idaho to Washington, D.C.

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Cheapest flights from Idaho to Washington, D.C.
Explore the most affordable flight options available from Idaho to Washington, D.C.. Find the lowest fares from popular airlines and budget airlines, with prices last updated on March 31, 2025.