Latest deals
Insights
FAQs
Reviews
Price Alerts

Cheap flights from Idaho to Washington, D.C. from $122

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Idaho to Washington, D.C. departing on 12/7. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

Discover deals from 900+ travel sites with momondo.

Save money when you book flights with momondo

Big names and deals

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize your results.

Trusted and free

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Price Alerts

Not ready to book? to track prices.
Search flight deals

Find the cheapest flights from Idaho to Washington, D.C.

Cheap round-trip flights

Frontier Logo
11:53 am - 12:04 pmGEG-DCA
21h 11m1 stop
Frontier Logo
1:00 pm - 11:08 amDCA-GEG
25h 08m1 stop
$235Frontier
Find Deal
dom., oct. 26 - mié., nov. 5
Frontier Logo
11:53 am - 12:04 pmGEG-DCA
21h 11m1 stop
Frontier Logo
1:00 pm - 11:08 amDCA-GEG
25h 08m1 stop
$239Frontier
Find Deal
dom., oct. 26 - mié., nov. 5
American Airlines Logo
1:10 pm - 11:12 pmJAC-DCA
8h 02m1 stop
American Airlines Logo
6:59 am - 12:29 pmDCA-JAC
7h 30m1 stop
$249American Airlines
Find Deal
mié., oct. 22 - mié., oct. 29
American Airlines Logo
12:19 pm - 12:59 amJAC-DCA
10h 40m2 stops
American Airlines Logo
6:35 am - 12:29 pmDCA-JAC
7h 54m1 stop
$254American Airlines
Find Deal
mié., oct. 22 - mié., oct. 29
Multiple Airlines Logo
9:08 pm - 4:59 pmGEG-DCA
40h 51m2 stops
Multiple Airlines Logo
1:00 pm - 11:08 amDCA-GEG
25h 08m1 stop
$275Multiple Airlines
Find Deal
dom., oct. 26 - mié., nov. 5
United Airlines Logo
12:35 pm - 10:43 pmBOI-DCA
8h 08m1 stop
United Airlines Logo
7:00 am - 1:44 pmDCA-BOI
8h 44m1 stop
$297United Airlines
Find Deal
mar., oct. 21 - mar., oct. 28
Delta Logo
1:39 pm - 11:41 pmBOI-DCA
8h 02m1 stop
Delta Logo
5:20 pm - 11:59 pmDCA-BOI
8h 39m2 stops
$302Delta
Find Deal
mar., oct. 21 - mar., oct. 28
Delta Logo
5:42 am - 8:59 pmBOI-DCA
13h 17m2 stops
Delta Logo
6:10 am - 4:05 pmDCA-BOI
11h 55m2 stops
$307Delta
Find Deal
mar., oct. 28 - mar., nov. 11
Multiple Airlines Logo
7:38 pm - 4:59 pmGEG-DCA
18h 21m2 stops
Multiple Airlines Logo
6:00 pm - 11:08 amDCA-GEG
20h 08m1 stop
$316Multiple Airlines
Find Deal
vie., oct. 24 - sáb., nov. 15
United Airlines Logo
10:40 am - 9:13 pmBOI-DCA
8h 33m1 stop
United Airlines Logo
11:30 am - 10:22 pmDCA-BOI
12h 52m2 stops
$496United Airlines
Find Deal
mar., mar. 10 - mié., mar. 11

Southwest flights from Idaho to Washington, D.C. Reagan-National Airport

Our best Southwest deals on Idaho to Washington, D.C. Reagan-National Airport flight tickets
Southwest
Oct 22
BOI11:40 amBoise Air Term. Gowen Fld
9h 45m
2 stops
DCA11:25 pmWashington, D.C. Reagan-National
Oct 29
DCA3:30 pmWashington, D.C. Reagan-National
9h 50m
2 stops
BOI11:20 pmBoise Air Term. Gowen Fld
$319
Find similar
Southwest
Oct 21
BOI7:40 amBoise Air Term. Gowen Fld
8h 30m
2 stops
DCA6:10 pmWashington, D.C. Reagan-National
Oct 28
DCA3:30 pmWashington, D.C. Reagan-National
9h 50m
2 stops
BOI11:20 pmBoise Air Term. Gowen Fld
$359
Find similar
Southwest
Oct 26
GEG5:50 amSpokane
12h 00m
2 stops
DCA8:50 pmWashington, D.C. Reagan-National
Nov 4
DCA4:35 pmWashington, D.C. Reagan-National
8h 25m
1 stop
GEG10:00 pmSpokane
$403
Find similar

Alaska Airlines flights from Idaho to Washington, D.C. Reagan-National Airport

Our best Alaska Airlines deals on Idaho to Washington, D.C. Reagan-National Airport flight tickets
Alaska Airlines
Oct 18
GEG7:00 amSpokane
10h 29m
1 stop
DCA8:29 pmWashington, D.C. Reagan-National
Oct 25
DCA8:00 amWashington, D.C. Reagan-National
10h 00m
1 stop
GEG3:00 pmSpokane
$329
Find similar
Alaska Airlines
Jan 5
GEG10:17 amSpokane
8h 42m
1 stop
DCA9:59 pmWashington, D.C. Reagan-National
Jan 17
DCA5:30 pmWashington, D.C. Reagan-National
9h 44m
1 stop
GEG12:14 amSpokane
$333
Find similar
Alaska Airlines
Nov 11
GEG7:00 amSpokane
11h 05m
1 stop
DCA9:05 pmWashington, D.C. Reagan-National
Nov 17
DCA8:59 amWashington, D.C. Reagan-National
17h 57m
1 stop
GEG11:56 pmSpokane
$339
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Idaho to Washington, D.C. Reagan-National Airport that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 832,500 searches. Data last updated septiembre 23, 2025.
Use the filters below to find and compare flights from Idaho to Washington, D.C. Reagan-National Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

SpokaneWashington, D.C.

GEG - DCA

GEGDCA

Spokane

dom. 10/26

11:53 am-12:04 pm

1 stop21h 11m

Washington, D.C. Reagan-National

mié. 11/5

1:00 pm-11:08 am

1 stop25h 08m

$235

SpokaneWashington, D.C.

GEG - DCA

GEGDCA

Spokane

dom. 10/26

11:53 am-12:04 pm

1 stop21h 11m

Washington, D.C. Reagan-National

mié. 11/5

1:00 pm-11:08 am

1 stop25h 08m

$239

JacksonWashington, D.C.

JAC - DCA

JACDCA

Jackson Hole

mié. 10/22

1:10 pm-11:12 pm

1 stop8h 02m

Washington, D.C. Reagan-National

mié. 10/29

6:59 am-12:29 pm

1 stop7h 30m

$249

JacksonWashington, D.C.

JAC - DCA

JACDCA

Jackson Hole

mié. 10/22

12:19 pm-12:59 am

2 stops10h 40m

Washington, D.C. Reagan-National

mié. 10/29

6:35 am-12:29 pm

1 stop7h 54m

$254

SpokaneWashington, D.C.

GEG - DCA

GEGDCA

Spokane

dom. 10/26

9:08 pm-4:59 pm

2 stops40h 51m

Washington, D.C. Reagan-National

mié. 11/5

1:00 pm-11:08 am

1 stop25h 08m

$275

BoiseWashington, D.C.

BOI - DCA

BOIDCA

Boise Air Term. Gowen Fld

mar. 10/21

12:35 pm-10:43 pm

1 stop8h 08m

Washington, D.C. Reagan-National

mar. 10/28

7:00 am-1:44 pm

1 stop8h 44m

$297

BoiseWashington, D.C.

BOI - DCA

BOIDCA

Boise Air Term. Gowen Fld

mar. 10/21

1:39 pm-11:41 pm

1 stop8h 02m

Washington, D.C. Reagan-National

mar. 10/28

5:20 pm-11:59 pm

2 stops8h 39m

$302

BoiseWashington, D.C.

BOI - DCA

BOIDCA

Boise Air Term. Gowen Fld

mar. 10/28

5:42 am-8:59 pm

2 stops13h 17m

Washington, D.C. Reagan-National

mar. 11/11

6:10 am-4:05 pm

2 stops11h 55m

$307

SpokaneWashington, D.C.

GEG - DCA

GEGDCA

Spokane

vie. 10/24

7:38 pm-4:59 pm

2 stops18h 21m

Washington, D.C. Reagan-National

sáb. 11/15

6:00 pm-11:08 am

1 stop20h 08m

$316

BoiseWashington, D.C.

BOI - DCA

BOIDCA

Boise Air Term. Gowen Fld

mar. 3/10

10:40 am-9:13 pm

1 stop8h 33m

Washington, D.C. Reagan-National

mié. 3/11

11:30 am-10:22 pm

2 stops12h 52m

$496

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
1
2

See travel insights to Washington, D.C. from

How to get the cheapest flight ticket from Idaho to Washington, D.C. Reagan-National Airport

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to Washington, D.C. Reagan-National Airport?

The month of November is, on average, the cheapest month to fly to Washington, D.C. Reagan-National Airport from Idaho, with most prices found around $410. If you aren’t able to travel to Washington, D.C. Reagan-National Airport during the month of November, then flying in July is also cheap. Prices for this month can be found on momondo for an average of $427.

What is the cheapest day to depart on your flight to Washington, D.C. Reagan-National Airport?

The cheapest day to depart from Idaho to Washington, D.C. Reagan-National Airport is on a Saturday. Travelers who choose to depart for Washington, D.C. Reagan-National Airport on a Saturday will often find tickets for as low as $532. Flights from Idaho to Washington, D.C. Reagan-National Airport on a Sunday will generally be more expensive and average around $699. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

What is the cheapest time of day to depart on your flight to Washington, D.C. Reagan-National Airport?

Our data shows that the cheapest Idaho to Washington, D.C. Reagan-National Airport flights are usually those with departure times in the evening. Our users have found flights to Washington, D.C. Reagan-National Airport in the evening for as low as $453. In contrast, the most expensive time of day to depart to Washington, D.C. Reagan-National Airport is in the morning when prices are around $634.

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

You are more likely to see cheaper flights to Washington, D.C. Reagan-National Airport from Idaho when booking weeks ahead of your departure date. In general, you can expect to find flights to Washington, D.C. Reagan-National Airport for around $522 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Washington, D.C. Reagan-National Airport from Idaho for as low as $224 on momondo.

Can stopping save me money on Idaho to Washington, D.C. Reagan-National Airport flights?

You could potentially save up to 59% on your flight if you consider stops on a Idaho to Washington, D.C. Reagan-National Airport flight.

Cheap Idaho to Washington, D.C. Reagan-National Airport flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Idaho to Washington, D.C. Reagan-National Airport

Direct flights

None
There are no direct flights from Idaho to Washington, D.C. Reagan-National Airport. There are no popular flight routes from Idaho to Washington, D.C. Reagan-National Airport.
Search flight deals

  • When did momondo last update prices for flights from Idaho to Washington, D.C. Reagan-National Airport?

    Prices for flights from Idaho to Washington, D.C. Reagan-National Airport are updated daily.

  • How many operators does momondo search for flights from Idaho to Washington, D.C. Reagan-National Airport?

  • How old do you have to be to fly from Idaho to Washington, D.C. Reagan-National Airport?

    The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Idaho to Washington, D.C. Reagan-National Airport.

  • What documentation or ID do you need to fly to Washington, D.C. Reagan-National Airport?

    The travel and health documents you'll need for your trip to Washington, D.C. Reagan-National Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Washington, D.C. Reagan-National Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

Best airlines flying from Idaho to Washington, D.C. Reagan-National Airport

Compare and see reviews for airlines that fly from Idaho to Washington, D.C. Reagan-National Airport with momondo
Airline
Rating
Free Cancellation
Price
DeltaPriceFrom $249Free CancellationRating
7.9
7,974 reviews
Search Delta flights
Alaska AirlinesPriceFrom $300Free CancellationRating
8.0
10,000 reviews
Search Alaska Airlines flights
American AirlinesPriceFrom $300Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
United AirlinesPriceFrom $370Free CancellationRating
7.4
8,926 reviews
Search United Airlines flights
SouthwestPriceFrom $403Free CancellationRating
8.0
4,244 reviews
Search Southwest flights

Traveling to a place near Washington, D.C.?

Book flights to Washington, D.C. if you plan to visit one of these locations
Alexandria
Gettysburg
National Harbor
Arlington
Woodbridge
Waldorf
Tysons
Laurel
Colonial Beach
Silver Spring
Fredericksburg
Towson
Rockville
Manassas
Reston
Fairfax
Glen Burnie
Gaithersburg
Springfield
Linthicum Heights

Why use momondo?

Why should I use momondo to find a flight deal from Idaho to Washington, D.C.?

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to Washington, D.C. from Idaho.

Can I find flights from Idaho to Washington, D.C. with flexible booking policies on momondo?

Yes. All flights to Washington, D.C. from Idaho on momondo can be compared and filtered by various policies on offer, including flexible booking.

How can momondo help me find flights from Idaho to Washington, D.C.?

Once all potential Idaho to Washington, D.C. flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

I’m not ready to book a flight from Idaho to Washington, D.C. right now. Can momondo alert me if prices change?

Of course. momondo tracks the price of Idaho to Washington, D.C. flights. All you need is a valid email address and we will do the rest; it is that quick and easy.

An easier way to manage your Washington, D.C. Reagan-National Airport trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.
Start using Trips
Find my bookings

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.
1 adult
jue. 10/23
jue. 10/30
By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to Washington, D.C.