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Cheap flights from Idaho to Washington, D.C. from $91

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 2/5. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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0 bags

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

Cheap round-trip flights

Enter your travel dates to find the best prices.
Frontier Logo
12:36 pm - 9:59 pm
BOI
-
DCA
7h 23m1 stop
Frontier Logo
8:00 am - 11:51 am
DCA
-
BOI
29h 51m1 stop
$155Frontier
Thu, Feb 19 - Wed, Feb 25
Frontier Logo
11:22 am - 9:59 pm
GEG
-
DCA
7h 37m1 stop
Frontier Logo
2:00 pm - 11:08 am
DCA
-
GEG
24h 08m1 stop
$166Frontier
Thu, Jan 15 - Wed, Jan 21
Frontier Logo
12:07 pm - 9:59 pm
BOI
-
DCA
7h 52m1 stop
Frontier Logo
8:00 am - 1:25 pm
DCA
-
BOI
7h 25m1 stop
$217Frontier
Sun, Jan 11 - Thu, Jan 15
Multiple Airlines Logo
9:53 am - 1:00 pm
GEG
-
DCA
24h 07m2 stops
Multiple Airlines Logo
2:00 pm - 11:27 am
DCA
-
GEG
24h 27m1 stop
$250Multiple Airlines
Fri, Feb 27 - Wed, Mar 4
Delta Logo
11:25 am - 11:44 pm
GEG
-
BWI
9h 19m2 stops
Delta Logo
3:00 pm - 10:52 pm
BWI
-
GEG
10h 52m2 stops
$276Delta
Fri, Jan 30 - Mon, Feb 2
Multiple Airlines Logo
12:03 pm - 9:59 pm
GEG
-
DCA
6h 56m1 stop
Multiple Airlines Logo
8:59 am - 9:25 pm
DCA
-
GEG
15h 26m2 stops
$281Multiple Airlines
Thu, Jan 29 - Thu, Feb 5
Delta Logo
10:41 am - 11:10 pm
BOI
-
IAD
10h 29m1 stop
Delta Logo
7:00 am - 1:05 pm
IAD
-
BOI
8h 05m1 stop
$287Delta
Sat, Mar 7 - Sat, Mar 14
Alaska Airlines Logo
6:00 pm - 5:20 pm
BOI
-
IAD
21h 20m1 stop
Alaska Airlines Logo
7:05 am - 6:22 pm
IAD
-
BOI
13h 17m1 stop
$305Alaska Airlines
Wed, Feb 18 - Sat, Feb 21
Alaska Airlines Logo
5:57 pm - 5:20 pm
GEG
-
IAD
20h 23m1 stop
Alaska Airlines Logo
7:05 am - 11:59 pm
IAD
-
GEG
19h 54m1 stop
$305Alaska Airlines
Mon, Feb 23 - Sat, Feb 28
Hawaiian Airlines Logo
6:28 am - 5:46 pm
BOI
-
BWI
9h 18m1 stop
Hawaiian Airlines Logo
6:46 pm - 9:40 am
BWI
-
BOI
16h 54m1 stop
$343Hawaiian Airlines
Thu, Feb 19 - Wed, Feb 25

United Airlines flights from Idaho to Washington, D.C.

Our best United Airlines deals on Idaho to Washington, D.C. flight tickets
United Airlines
Jan 16
GEG5:00 amSpokane
8h 35m
1 stop
IAD4:35 pmWashington, D.C. Dulles Intl
Jan 24
IAD8:15 amWashington, D.C. Dulles Intl
7h 31m
1 stop
GEG12:46 pmSpokane
$352
Find similar
United Airlines
Jan 16
GEG1:48 pmSpokane
6h 27m
1 stop
BWI11:15 pmBaltimore/Washington
Jan 24
BWI10:05 amBaltimore/Washington
14h 17m
2 stops
GEG9:22 pmSpokane
$357
Find similar
United Airlines
Jan 18
BOI2:37 pmBoise Air Term. Gowen Fld
6h 38m
1 stop
BWI11:15 pmBaltimore/Washington
Jan 22
BWI8:42 amBaltimore/Washington
9h 28m
1 stop
BOI4:10 pmBoise Air Term. Gowen Fld
$399
Find similar

Delta flights from Idaho to Washington, D.C.

Our best Delta deals on Idaho to Washington, D.C. flight tickets
Delta
Jan 30
GEG11:25 amSpokane
9h 19m
2 stops
BWI11:44 pmBaltimore/Washington
Feb 2
BWI3:00 pmBaltimore/Washington
10h 52m
2 stops
GEG10:52 pmSpokane
$276
Find similar
Delta
Jan 30
GEG11:25 amSpokane
8h 45m
1 stop
IAD11:10 pmWashington, D.C. Dulles Intl
Feb 2
IAD7:30 amWashington, D.C. Dulles Intl
8h 07m
1 stop
GEG12:37 pmSpokane
$287
Find similar
Delta
Jan 24
BOI10:39 amBoise Air Term. Gowen Fld
11h 09m
2 stops
IAD11:48 pmWashington, D.C. Dulles Intl
Jan 31
IAD7:30 amWashington, D.C. Dulles Intl
10h 47m
1 stop
BOI4:17 pmBoise Air Term. Gowen Fld
$292
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Idaho to Washington, D.C. 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 December 27, 2025.
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

BoiseWashington, D.C.

BOI - DCA

BOIDCA

Boise Air Term. Gowen Fld

Thu 2/19

12:36 pm-9:59 pm

1 stop7h 23m

Washington, D.C. Reagan-National

Wed 2/25

8:00 am-11:51 am

1 stop29h 51m

$155

SpokaneWashington, D.C.

GEG - DCA

GEGDCA

Spokane

Thu 1/15

11:22 am-9:59 pm

1 stop7h 37m

Washington, D.C. Reagan-National

Wed 1/21

2:00 pm-11:08 am

1 stop24h 08m

$166

BoiseWashington, D.C.

BOI - DCA

BOIDCA

Boise Air Term. Gowen Fld

Sun 1/11

12:07 pm-9:59 pm

1 stop7h 52m

Washington, D.C. Reagan-National

Thu 1/15

8:00 am-1:25 pm

1 stop7h 25m

$217

SpokaneWashington, D.C.

GEG - DCA

GEGDCA

Spokane

Fri 2/27

9:53 am-1:00 pm

2 stops24h 07m

Washington, D.C. Reagan-National

Wed 3/4

2:00 pm-11:27 am

1 stop24h 27m

$250

SpokaneBaltimore

GEG - BWI

GEGBWI

Spokane

Fri 1/30

11:25 am-11:44 pm

2 stops9h 19m

Baltimore/Washington

Mon 2/2

3:00 pm-10:52 pm

2 stops10h 52m

$276

SpokaneWashington, D.C.

GEG - DCA

GEGDCA

Spokane

Thu 1/29

12:03 pm-9:59 pm

1 stop6h 56m

Washington, D.C. Reagan-National

Thu 2/5

8:59 am-9:25 pm

2 stops15h 26m

$281

BoiseWashington, D.C.

BOI - IAD

BOIIAD

Boise Air Term. Gowen Fld

Sat 3/7

10:41 am-11:10 pm

1 stop10h 29m

Washington, D.C. Dulles Intl

Sat 3/14

7:00 am-1:05 pm

1 stop8h 05m

$287

BoiseWashington, D.C.

BOI - IAD

BOIIAD

Boise Air Term. Gowen Fld

Wed 2/18

6:00 pm-5:20 pm

1 stop21h 20m

Washington, D.C. Dulles Intl

Sat 2/21

7:05 am-6:22 pm

1 stop13h 17m

$305

SpokaneWashington, D.C.

GEG - IAD

GEGIAD

Spokane

Mon 2/23

5:57 pm-5:20 pm

1 stop20h 23m

Washington, D.C. Dulles Intl

Sat 2/28

7:05 am-11:59 pm

1 stop19h 54m

$305

BoiseBaltimore

BOI - BWI

BOIBWI

Boise Air Term. Gowen Fld

Thu 2/19

6:28 am-5:46 pm

1 stop9h 18m

Baltimore/Washington

Wed 2/25

6:46 pm-9:40 am

1 stop16h 54m

$343

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Washington, D.C. from

How to get the cheapest flight ticket from Idaho to Washington, D.C.

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.?

The month of August is, on average, the cheapest month to fly to Washington, D.C. from Idaho, with most prices found around $293. If you’re not able to fly to Washington, D.C. in August, then February is your next best option. Flight prices from Idaho to Washington, D.C. during February average around $351.

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

On average, the least expensive day to fly to Washington, D.C. from Idaho is on a Saturday. momondo users have found tickets for Saturday departures for as low as $436. However, this price may fluctuate depending on the airline, the season, and holidays. When flying out on a Sunday, the most expensive travel day of the week, you can expect to see flight prices from Idaho to Washington, D.C. for around $551.

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

In the afternoon is the cheapest time of day to fly from Idaho to Washington, D.C. when you can find flight prices for as low as $433. Flying to Washington, D.C. in the afternoon is an ideal time because this is during off-peak travel hours. Try not to purchase tickets at noon because they tend to be around $547. Of course, these prices can vary depending on the time of year and what airport you fly to.

Can stopping save me money on Idaho to Washington, D.C. flights?

You could potentially save up to 57% on your flight if you consider stops on a Idaho to Washington, D.C. flight.

Cheap Idaho to Washington, D.C. flight deals and tips

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

Fastest flight time

6h 00m

Direct flights

Sun

Airports in Washington, D.C.

2 airports
The fastest flight from Idaho to Washington, D.C. takes 6h 00m
Direct flights go from Idaho to Washington, D.C. on Sunday. There are no airlines offering direct flights.
There are 2 airports in Washington, D.C.. From Idaho there are direct flights to Washington, D.C. Dulles Intl (IAD).
Search flight deals

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

    Prices for flights from Idaho to Washington, D.C. were last updated today.

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

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

    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..

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

    The necessary travel and health documents for your Washington, D.C. trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

Best airlines flying from Idaho to Washington, D.C.

Compare and see reviews for airlines that fly from Idaho to Washington, D.C. with momondo
Airline
Rating
Free Cancellation
Price
Alaska AirlinesPriceFrom $141Free CancellationRating
8.0
11,544 reviews
Search Alaska Airlines flights
DeltaPriceFrom $249Free CancellationRating
7.9
8,018 reviews
Search Delta flights
American AirlinesPriceFrom $298Free CancellationRating
7.2
11,068 reviews
Search American Airlines flights
United AirlinesPriceFrom $300Free CancellationRating
7.4
9,116 reviews
Search United Airlines flights
SouthwestPriceFrom $351Free CancellationRating
8.0
4,258 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
National Harbor
Gettysburg
Arlington
Waldorf
Woodbridge
Tysons
Laurel
Colonial Beach
Silver Spring
Fredericksburg
Towson
Rockville
Gaithersburg
Reston
Manassas
Fairfax
Glen Burnie
Linthicum Heights
Bethesda

Why use momondo?

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

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from Idaho to Washington, D.C. for you.

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

Yes. momondo enables you to select and highlight flights to Washington, D.C. from Idaho with this policy.

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

momondo helps you find the best flight between Idaho and Washington, D.C. by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

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

Yes momondo offers price alerts on flights to Washington, D.C. from Idaho. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.

An easier way to manage your Washington, D.C. trip

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Find better results for your trip to the United States

Fly into one of these airports located in Washington, D.C.

Airports listed have a maximum distance of 22.4 mi from Washington, D.C.
Washington, D.C. Reagan-National Airport
Washington, D.C. Dulles Intl Airport