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

The cheapest airlines for a one-way flight from Idaho to Washington, D.C. Reagan-National Airport are Frontier ($85), Delta ($116), and Hawaiian Airlines ($148).

What are the most popular routes from Idaho to Washington, D.C. Reagan-National Airport?

Most travelers choose Boise Air Term. Gowen Fld - Washington, D.C. Reagan-National, Spokane - Washington, D.C. Reagan-National or Jackson Hole - Washington, D.C. Reagan-National when deciding on the best route from Idaho to Washington, D.C. Reagan-National Airport.

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

The most popular airlines flying from Idaho to Washington, D.C. Reagan-National Airport are American Airlines, Alaska Airlines and Delta. Something to consider prior to booking your flight.

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

To save on the cost of your flight from Idaho to Washington, D.C. Reagan-National Airport, 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. Reagan-National Airport?

Due to multiple factors, expect to potentially pay more when booking in March. For low rates, February can be a great choice for travel to Washington, D.C. Reagan-National Airport. Flights to Washington, D.C. Reagan-National Airport from Idaho in February are about $485 on average during February, but can be found for as low as $300.

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

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

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

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

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

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

$85+ Flights from Idaho to Washington, D.C. Reagan-National Airport

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Cheap flight deals from Idaho to Reagan-National

Most accurate provider	FlightHub 3 stars
Most trusted provider	FlightHub 3 stars
Round-trip from	$231 (Delta)
One-way from	$85 (Frontier)
Popular in	March
Cheapest in	February
Average price	$647

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. Reagan-National

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One-way flight from Idaho to Washington, D.C. Reagan-National

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High demand for flights, 0% potential price rise

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Cheapest flight prices on average. 3% potential price decrease ($15 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 Reagan-National

Cheapest flights from Idaho to Reagan-National
Explore the most affordable flight options available from Idaho to Reagan-National. Find the lowest fares from popular airlines and budget airlines, with prices last updated on March 5, 2025.

Fri 4/185:30 amBOI - DCA

1 stop6h 00mDelta

Sun 4/205:10 pmDCA - BOI

1 stop8h 59mDelta

Deal found 3/5

$231

Thu 4/179:00 amBOI - DCA

1 stop10h 55mAlaska Airlines

Sat 4/196:58 pmDCA - BOI

1 stop16h 10mAlaska Airlines

Deal found 3/4

$263

Thu 5/15:00 amGEG - DCA

1 stop7h 31mDelta

Sun 5/44:50 pmDCA - GEG

1 stop10h 09mDelta

Deal found 3/5

$297

Wed 3/265:30 amBOI - DCA

2 stops7h 50mSouthwest

Wed 4/24:35 pmDCA - BOI

1 stop8h 10mSouthwest

Deal found 3/5

$302

Wed 4/1612:53 pmJAC - DCA

1 stop8h 07mAmerican Airlines

Wed 4/236:30 amDCA - JAC

1 stop7h 43mAmerican Airlines

Deal found 3/5

$327

Tue 4/11:36 pmBOI - DCA

1 stop7h 23mAmerican Airlines

Fri 4/46:30 amDCA - BOI

1 stop8h 03mAmerican Airlines

Deal found 3/4

$328

Wed 4/167:05 amJAC - DCA

1 stop6h 55mDelta

Wed 4/236:00 amDCA - JAC

2 stops12h 41mDelta

Deal found 3/5

$332

Fri 4/119:41 pmGEG - DCA

1 stop17h 17mAlaska Airlines

Tue 4/158:59 amDCA - GEG

1 stop17h 03mAlaska Airlines

Deal found 3/5

$346

Thu 4/312:58 pmIDA - DCA

1 stop9h 52mAmerican Airlines

Wed 4/91:10 pmDCA - IDA

2 stops11h 00mAmerican Airlines

Deal found 3/4

$400

Thu 6/1212:36 pmBOI - DCA

1 stop7h 23mFrontier

Tue 6/177:00 amDCA - BOI

1 stop6h 47mFrontier

Deal found 3/4

$420

Wed 5/215:34 amGEG - DCA

2 stops12h 01mAmerican Airlines

Sun 5/255:00 amDCA - GEG

2 stops10h 25mAmerican Airlines

Deal found 3/4

$430

Sat 4/197:30 amSUN - DCA

2 stops9h 33mDelta

Tue 4/225:10 pmDCA - SUN

1 stop7h 15mDelta

Deal found 3/4

$462

Best flights from Idaho to Reagan-National
Discover carefully curated flight deals from Idaho to Reagan-National that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated March 5, 2025.

Thu 4/243:30 pmBOI - DCA

1 stop6h 28mDelta

Tue 4/294:50 pmDCA - BOI

1 stop8h 57mDelta

Deal found 3/4

$231

Thu 4/179:00 amBOI - DCA

1 stop10h 55mAlaska Airlines

Sat 4/196:58 pmDCA - BOI

1 stop16h 10mAlaska Airlines

Deal found 3/4

$263

Wed 3/267:05 amBOI - DCA

2 stops8h 54mAmerican Airlines

Wed 4/25:00 amDCA - BOI

2 stops9h 46mAmerican Airlines

Deal found 3/4

$307

Sun 5/45:00 amBOI - DCA

2 stops9h 15mSouthwest

Wed 5/73:50 pmDCA - BOI

2 stops9h 40mSouthwest

Deal found 3/4

$388

Thu 6/1212:36 pmBOI - DCA

1 stop7h 23mFrontier

Tue 6/177:00 amDCA - BOI

1 stop6h 47mFrontier

Deal found 3/4

$420

Tue 3/256:00 amGEG - DCA

1 stop7h 55mHawaiian Airlines

Sun 3/305:55 pmDCA - GEG

1 stop9h 04mHawaiian Airlines

Deal found 3/5

$472

Wed 3/197:00 amJAC - DCA

1 stop5h 59mUnited Airlines

Sun 3/237:00 amDCA - JAC

1 stop8h 14mUnited Airlines

Deal found 3/4

$559

Thu 5/15:00 amGEG - DCA

1 stop7h 31mDelta

Sun 5/44:50 pmDCA - GEG

1 stop10h 09mDelta

Deal found 3/5

$297

Wed 4/1612:53 pmJAC - DCA

1 stop8h 07mAmerican Airlines

Wed 4/236:30 amDCA - JAC

1 stop7h 43mAmerican Airlines

Deal found 3/5

$327

Fri 4/119:41 pmGEG - DCA

1 stop17h 17mAlaska Airlines

Tue 4/158:59 amDCA - GEG

1 stop17h 03mAlaska Airlines

Deal found 3/5

$346

Wed 4/167:05 amJAC - DCA

1 stop6h 55mDelta

Wed 4/236:00 amDCA - JAC

2 stops12h 41mDelta

Deal found 3/5

$332

Wed 3/2612:43 pmSUN - DCA

1 stop6h 14mMultiple Airlines

Mon 3/315:55 pmDCA - SUN

1 stop17h 48mMultiple Airlines

Deal found 3/5

$801

Last-minute flights from Idaho to Reagan-National
Discover last-minute flight deals from Idaho to Reagan-National. Data last updated March 5, 2025 and is based on user searches.

Tue 3/117:05 amBOI - DCA

1 stop9h 46mAmerican Airlines

Fri 3/147:10 amDCA - BOI

1 stop11h 35mAmerican Airlines

Deal found 3/3

$776

Thu 3/139:40 amBOI - DCA

1 stop10h 19mAlaska Airlines

Sun 3/169:00 amDCA - BOI

1 stop29h 31mAlaska Airlines

Deal found 3/3

$810

Thu 3/136:40 amBOI - DCA

2 stops9h 30mSouthwest

Sun 3/164:55 pmDCA - BOI

1 stop8h 30mSouthwest

Deal found 3/3

$884

Fri 3/1411:30 pmBOI - DCA

1 stop7h 38mDelta

Mon 3/176:59 pmDCA - BOI

1 stop7h 00mDelta

Deal found 3/3

$649

Tue 3/256:00 amGEG - DCA

1 stop7h 55mHawaiian Airlines

Sun 3/305:55 pmDCA - GEG

1 stop9h 04mHawaiian Airlines

Deal found 3/5

$472

Wed 3/267:05 amBOI - DCA

2 stops8h 54mAmerican Airlines

Wed 4/25:00 amDCA - BOI

2 stops9h 46mAmerican Airlines

Deal found 3/4

$307

Wed 3/2611:29 amBOI - DCA

1 stop8h 30mHawaiian Airlines

Sun 3/308:00 amDCA - BOI

1 stop11h 04mHawaiian Airlines

Deal found 3/5

$513

Thu 4/312:58 pmIDA - DCA

1 stop9h 52mAmerican Airlines

Wed 4/91:10 pmDCA - IDA

2 stops11h 00mAmerican Airlines

Deal found 3/4

$400

Fri 4/1110:45 pmGEG - DCA

1 stop7h 21mDelta

Tue 4/154:00 pmDCA - GEG

2 stops10h 56mDelta

Deal found 3/5

$302

Fri 4/119:41 pmGEG - DCA

1 stop17h 17mAlaska Airlines

Tue 4/158:59 amDCA - GEG

1 stop17h 03mAlaska Airlines

Deal found 3/5

$346

Wed 4/1612:53 pmJAC - DCA

1 stop8h 07mAmerican Airlines

Wed 4/236:30 amDCA - JAC

1 stop7h 43mAmerican Airlines

Deal found 3/5

$327

Wed 4/167:05 amJAC - DCA

1 stop6h 55mDelta

Wed 4/236:00 amDCA - JAC

2 stops12h 41mDelta

Deal found 3/5

$332

One-way flights from Idaho to Reagan-National
Search for one-way flight options from Idaho to Reagan-National. Find affordable one-way fares based on user searches. Data last updated March 5, 2025.

Tue 5/2011:56 amGEG - DCA

1 stop7h 03mFrontier

Deal found 3/5

$85

Sun 4/135:45 amBOI - DCA

1 stop7h 44mDelta

Deal found 3/4

$116

Wed 3/269:40 amBOI - DCA

1 stop10h 19mHawaiian Airlines

Deal found 3/5

$148

Sun 5/257:00 amGEG - DCA

1 stop11h 10mHawaiian Airlines

Deal found 3/5

$148

Sat 3/296:38 amBOI - DCA

1 stop7h 21mAmerican Airlines

Deal found 3/5

$151

Wed 3/265:30 amBOI - DCA

2 stops7h 50mSouthwest

Deal found 3/5

$154

Sat 6/145:05 amGEG - DCA

1 stop7h 24mDelta

Deal found 3/3

$184

Wed 7/165:05 amGEG - DCA

2 stops10h 15mSouthwest

Deal found 3/4

$189

Thu 6/1212:36 pmBOI - DCA

1 stop7h 23mFrontier

Deal found 3/4

$207

Sat 8/307:00 amJAC - DCA

1 stop7h 29mAmerican Airlines

Deal found 3/4

$260

Mon 5/2611:40 amJAC - DCA

2 stops10h 03mDelta

Deal found 3/4

$295

Sat 3/292:47 pmBOI - DCA

2 stops14h 13mAlaska Airlines

Deal found 3/4

$302

Find flights from Idaho to Reagan-National within your budget

Fly from

Fly to

Route

Depart

Return

Price

BoiseWashington, D.C.

BOI - DCA

BOIDCA

Boise Air Term. Gowen Fld

Fri 4/18

5:30 am-1:30 pm

1 stop6h 00m

Washington, D.C. Reagan-National

Sun 4/20

5:10 pm-12:09 am

1 stop8h 59m

$231

BoiseWashington, D.C.

BOI - DCA

BOIDCA

Boise Air Term. Gowen Fld

Thu 4/17

9:00 am-9:55 pm

1 stop10h 55m

Washington, D.C. Reagan-National

Sat 4/19

6:58 pm-9:08 am

1 stop16h 10m

$263

SpokaneWashington, D.C.

GEG - DCA

GEGDCA

Spokane

Thu 5/1

5:00 am-3:31 pm

1 stop7h 31m

Washington, D.C. Reagan-National

Sun 5/4

4:50 pm-11:59 pm

1 stop10h 09m

$297

BoiseWashington, D.C.

BOI - DCA

BOIDCA

Boise Air Term. Gowen Fld

Wed 3/26

5:30 am-3:20 pm

2 stops7h 50m

Washington, D.C. Reagan-National

Wed 4/2

8:00 am-5:10 pm

2 stops11h 10m

$307

JacksonWashington, D.C.

JAC - DCA

JACDCA

Jackson Hole

Wed 4/16

12:53 pm-11:00 pm

1 stop8h 07m

Washington, D.C. Reagan-National

Wed 4/23

6:30 am-12:13 pm

1 stop7h 43m

$327

BoiseWashington, D.C.

BOI - DCA

BOIDCA

Boise Air Term. Gowen Fld

Tue 4/1

1:36 pm-10:59 pm

1 stop7h 23m

Washington, D.C. Reagan-National

Fri 4/4

6:30 am-12:33 pm

1 stop8h 03m

$328

JacksonWashington, D.C.

JAC - DCA

JACDCA

Jackson Hole

Wed 4/16

7:05 am-4:00 pm

1 stop6h 55m

Washington, D.C. Reagan-National

Wed 4/23

6:00 am-4:41 pm

2 stops12h 41m

$332

SpokaneWashington, D.C.

GEG - DCA

GEGDCA

Spokane

Fri 4/11

9:41 pm-5:58 pm

1 stop17h 17m

Washington, D.C. Reagan-National

Tue 4/15

8:59 am-11:02 pm

1 stop17h 03m

$346

Idaho FallsWashington, D.C.

IDA - DCA

IDADCA

Idaho Falls Fanning Field

Thu 4/3

12:58 pm-12:50 am

1 stop9h 52m

Washington, D.C. Reagan-National

Wed 4/9

1:10 pm-10:10 pm

2 stops11h 00m

$400

BoiseWashington, D.C.

BOI - DCA

BOIDCA

Boise Air Term. Gowen Fld

Thu 6/12

12:36 pm-9:59 pm

1 stop7h 23m

Washington, D.C. Reagan-National

Tue 6/17

7:00 am-11:47 am

1 stop6h 47m

$420

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/5

Showing 1-10 of 45 results

...

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

Have a flexible travel schedule? Discover the best time to fly to Reagan-National 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.

Travel insights for flights from Idaho to Reagan-National

Get recent, data-driven insights about flights from Idaho to Reagan-National including ideal travel times, pricing trends, and more.

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

Currently, February is the cheapest month in which you can book a flight from Idaho to Washington, D.C. Reagan-National Airport (average of $278). Flying from Idaho to Washington, D.C. Reagan-National Airport in June 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 ID to DCA?

When flying from Idaho to Washington, D.C. Reagan-National Airport, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Rainfall in Reagan-National by month

In terms of precipitation, rainfall in Washington, D.C. Reagan-National Airport 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. Reagan-National Airport when rainfall is around 2.6 in.

Temperature in Reagan-National by month

If weather is an important factor for your trip to Washington, D.C. Reagan-National Airport, 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 Reagan-National

To help decide which airline to fly from Idaho to Washington, D.C., see what other customers have to say about Southwest, Alaska Airlines and Delta. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.

Southwest

8.1

Very good

4,321 reviews

Reviews

1 / 20

8.0

Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.

Southwest

8.1

Very good

4,321 reviews

Southwest

8.1

Very good

4,321 reviews

Reviews

1 / 20

8.0

Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.

Alaska Airlines

8.0

Very good

9,711 reviews

Southwest

8.1

Very good

4,321 reviews

Reviews

1 / 20

8.0

Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.

Delta

8.0

Very good

8,044 reviews

Southwest

8.1

Very good

4,321 reviews

Reviews

1 / 20

8.0

Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.

Hawaiian Airlines

7.9

Good

2,318 reviews

Southwest

8.1

Very good

4,321 reviews

Reviews

1 / 20

8.0

Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.

United Airlines

7.4

Good

8,655 reviews

Southwest

8.1

Very good

4,321 reviews

Reviews

1 / 20

8.0

Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.

Related info for your journey

What are the cheapest airlines to fly from Idaho to Washington, D.C. Reagan-National Airport one-way?
The cheapest airlines for a one-way flight from Idaho to Washington, D.C. Reagan-National Airport are Frontier ($85), Delta ($116), and Hawaiian Airlines ($148).
What are the most popular routes from Idaho to Washington, D.C. Reagan-National Airport?
Most travelers choose Boise Air Term. Gowen Fld - Washington, D.C. Reagan-National, Spokane - Washington, D.C. Reagan-National or Jackson Hole - Washington, D.C. Reagan-National when deciding on the best route from Idaho to Washington, D.C. Reagan-National Airport.
Can I find deals for flights from Idaho to Reagan-National that include hotel bookings?
Yes. In addition to deals on Idaho to Reagan-National flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from Idaho to Reagan-National?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Idaho to Reagan-National.
Can I find deals for business class flights from Idaho to Reagan-National?
Yes. Cheapflights offers flight deals from Idaho to Reagan-National 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. Reagan-National Airport?
Currently, February is the cheapest month in which you can book a flight from Idaho to Washington, D.C. Reagan-National Airport (average of $278). Flying from Idaho to Washington, D.C. Reagan-National Airport in June 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

Arlington

Alexandria

Fairfax

Tysons

Springfield

Rockville

Gaithersburg

Fredericksburg

Silver Spring

Linthicum Heights

Woodbridge

Laurel

Falls Church

Easton

Herndon

Bowie

Gettysburg

National Harbor

Oxon Hill

Reston

Browse thousands of different options on Cheapflights for your next trip

Top 4 airlines flying from Idaho to Reagan-National

Airline	Cheapest	Average	Flexibility	On-time
Delta	Cheapest$343	Average$540	FlexibilityNo cancel fee	On-timeN/A
American Airlines	Cheapest$359	Average$615	FlexibilityNo cancel fee	On-time71%
United Airlines	Cheapest$380	Average$765	FlexibilityNo cancel fee	On-time69%
Alaska Airlines	Cheapest$451	Average$635	FlexibilityNo cancel fee	On-time75%

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$85+ Cheap flights from Idaho to Reagan-National (DCA)

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 5/20. Fares are subject to change and may not be available on all flights or dates of travel.

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Cheap flight deals from Idaho to Reagan-National

Keep the following information in mind while searching for Idaho to Reagan-National flight deals. Data was last updated March 5, 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 Reagan-National

Cheapest flights from Idaho to Reagan-NationalExplore the most affordable flight options available from Idaho to Reagan-National. Find the lowest fares from popular airlines and budget airlines, with prices last updated on March 5, 2025.

Explore the most affordable flight options available from Idaho to Reagan-National. Find the lowest fares from popular airlines and budget airlines, with prices last updated on March 5, 2025.

Find flights from Idaho to Reagan-National within your budget

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

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

Travel insights for flights from Idaho to Reagan-National

Get recent, data-driven insights about flights from Idaho to Reagan-National including ideal travel times, pricing trends, and more.

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

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

Find hourly flight availability from Idaho to Reagan-National. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated March 5, 2025.

Rainfall in Reagan-National by month

Plan your trip to Reagan-National by taking into account the average rainfall totals by month.

Temperature in Reagan-National by month

Plan your trip to Reagan-National by taking into account the average temperature totals by month.

Reviews of airlines servicing Reagan-National

To help decide which airline to fly from Idaho to Washington, D.C., see what other customers have to say about Southwest, Alaska Airlines and Delta. 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 to Reagan-National. 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. Reagan-National Airport one-way?

What are the most popular routes from Idaho to Washington, D.C. Reagan-National Airport?

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

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

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

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

Traveling to a place near Idaho?

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Alternative routes for Idaho to Reagan-National

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Top 4 airlines flying from Idaho to Reagan-National

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Cheapest flights from Idaho to Reagan-National
Explore the most affordable flight options available from Idaho to Reagan-National. Find the lowest fares from popular airlines and budget airlines, with prices last updated on March 5, 2025.