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Cheap flights from Idaho to Washington, D.C. from $99

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 9/20. 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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Find the cheapest flights from Idaho to Washington, D.C.

Cheap round-trip flights

Southwest Logo
5:30 am - 3:00 pmGEG-IAD
6h 30m1 stop
Southwest Logo
5:05 pm - 9:00 pmIAD-GEG
6h 55m1 stop
$198Southwest
Find Deal
sáb., sep. 6 - sáb., sep. 13
Spirit Airlines Logo
2:16 pm - 4:30 amBOI-BWI
12h 14m1 stop
Spirit Airlines Logo
8:16 am - 8:31 pmBWI-BOI
14h 15m1 stop
$203Spirit Airlines
Find Deal
jue., sep. 4 - lun., sep. 8
Hawaiian Airlines Logo
8:46 pm - 7:33 amBOI-IAD
8h 47m1 stop
Hawaiian Airlines Logo
9:00 am - 5:18 pmIAD-BOI
10h 18m1 stop
$210Hawaiian Airlines
Find Deal
sáb., sep. 13 - mié., sep. 17
Delta Logo
7:45 pm - 6:01 amBOI-IAD
8h 16m1 stop
Delta Logo
7:35 am - 4:06 pmIAD-BOI
10h 31m1 stop
$211Delta
Find Deal
jue., oct. 2 - mié., oct. 15
Delta Logo
5:00 am - 3:25 pmGEG-DCA
7h 25m1 stop
Delta Logo
6:00 am - 11:22 amDCA-GEG
8h 22m1 stop
$211Delta
Find Deal
sáb., sep. 6 - sáb., sep. 13
American Airlines Logo
6:00 am - 4:47 pmGEG-IAD
7h 47m1 stop
American Airlines Logo
6:25 am - 11:45 amIAD-GEG
8h 20m1 stop
$211American Airlines
Find Deal
sáb., sep. 20 - sáb., sep. 27
American Airlines Logo
1:38 pm - 1:00 amBOI-DCA
9h 22m1 stop
American Airlines Logo
6:30 am - 12:27 pmDCA-BOI
7h 57m1 stop
$211American Airlines
Find Deal
sáb., sep. 13 - mié., sep. 17
Hawaiian Airlines Logo
8:51 pm - 7:33 amGEG-IAD
7h 42m1 stop
Hawaiian Airlines Logo
6:09 pm - 12:19 amIAD-GEG
9h 10m1 stop
$218Hawaiian Airlines
Find Deal
mar., sep. 9 - jue., sep. 11
Alaska Airlines Logo
5:45 pm - 5:39 amBOI-BWI
9h 54m1 stop
Alaska Airlines Logo
7:00 am - 3:00 pmBWI-BOI
10h 00m1 stop
$220Alaska Airlines
Find Deal
mar., sep. 9 - jue., sep. 18
Alaska Airlines Logo
7:07 am - 9:59 pmBOI-DCA
12h 52m1 stop
Alaska Airlines Logo
5:06 pm - 12:08 amDCA-BOI
9h 02m1 stop
$226Alaska Airlines
Find Deal
jue., sep. 18 - mar., sep. 23

Delta flights from Idaho to Washington, D.C.

Our best Delta deals on Idaho to Washington, D.C. flight tickets
Delta
Sep 6
GEG5:05 pmSpokane
9h 55m
1 stop
BWI6:00 amBaltimore/Washington
Sep 13
BWI7:15 amBaltimore/Washington
7h 40m
1 stop
GEG11:55 amSpokane
$211
Find similar
Delta
Sep 6
GEG5:05 pmSpokane
9h 55m
1 stop
BWI6:00 amBaltimore/Washington
Sep 13
BWI5:35 amBaltimore/Washington
10h 42m
2 stops
GEG1:17 pmSpokane
$216
Find similar
Delta
Oct 29
BOI9:00 amBoise Air Term. Gowen Fld
12h 49m
2 stops
BWI11:49 pmBaltimore/Washington
Nov 1
BWI5:39 pmBaltimore/Washington
8h 15m
2 stops
BOI11:54 pmBoise Air Term. Gowen Fld
$221
Find similar

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

Our best Spirit Airlines deals on Idaho to Washington, D.C. flight tickets
Spirit Airlines
Sep 4
BOI2:16 pmBoise Air Term. Gowen Fld
12h 14m
1 stop
BWI4:30 amBaltimore/Washington
Sep 8
BWI8:16 amBaltimore/Washington
14h 15m
1 stop
BOI8:31 pmBoise Air Term. Gowen Fld
$203
Find similar
Spirit Airlines
Sep 18
BOI2:16 pmBoise Air Term. Gowen Fld
12h 14m
1 stop
BWI4:30 amBaltimore/Washington
Sep 24
BWI7:02 pmBaltimore/Washington
20h 19m
1 stop
BOI1:21 pmBoise Air Term. Gowen Fld
$217
Find similar
Spirit Airlines
Sep 12
BOI9:26 pmBoise Air Term. Gowen Fld
29h 04m
1 stop
BWI4:30 amBaltimore/Washington
Sep 15
BWI8:16 amBaltimore/Washington
14h 15m
1 stop
BOI8:31 pmBoise Air Term. Gowen Fld
$229
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 agosto 7, 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

SpokaneWashington, D.C.

GEG - IAD

GEGIAD

Spokane

sáb. 9/6

5:30 am-3:00 pm

1 stop6h 30m

Washington, D.C. Dulles Intl

sáb. 9/13

5:05 pm-9:00 pm

1 stop6h 55m

$198

BoiseBaltimore

BOI - BWI

BOIBWI

Boise Air Term. Gowen Fld

jue. 9/4

2:16 pm-4:30 am

1 stop12h 14m

Baltimore/Washington

lun. 9/8

8:16 am-8:31 pm

1 stop14h 15m

$203

BoiseWashington, D.C.

BOI - IAD

BOIIAD

Boise Air Term. Gowen Fld

sáb. 9/13

8:46 pm-7:33 am

1 stop8h 47m

Washington, D.C. Dulles Intl

mié. 9/17

9:00 am-5:18 pm

1 stop10h 18m

$210

BoiseWashington, D.C.

BOI - IAD

BOIIAD

Boise Air Term. Gowen Fld

jue. 10/2

7:45 pm-6:01 am

1 stop8h 16m

Washington, D.C. Dulles Intl

mié. 10/15

7:35 am-4:06 pm

1 stop10h 31m

$211

SpokaneWashington, D.C.

GEG - DCA

GEGDCA

Spokane

sáb. 9/6

5:00 am-3:25 pm

1 stop7h 25m

Washington, D.C. Reagan-National

sáb. 9/13

6:00 am-11:22 am

1 stop8h 22m

$211

SpokaneWashington, D.C.

GEG - IAD

GEGIAD

Spokane

sáb. 9/20

6:00 am-4:47 pm

1 stop7h 47m

Washington, D.C. Dulles Intl

sáb. 9/27

6:25 am-11:45 am

1 stop8h 20m

$211

BoiseWashington, D.C.

BOI - DCA

BOIDCA

Boise Air Term. Gowen Fld

sáb. 9/13

1:38 pm-1:00 am

1 stop9h 22m

Washington, D.C. Reagan-National

mié. 9/17

6:30 am-12:27 pm

1 stop7h 57m

$211

SpokaneWashington, D.C.

GEG - IAD

GEGIAD

Spokane

mar. 9/9

8:51 pm-7:33 am

1 stop7h 42m

Washington, D.C. Dulles Intl

jue. 9/11

6:09 pm-12:19 am

1 stop9h 10m

$218

BoiseBaltimore

BOI - BWI

BOIBWI

Boise Air Term. Gowen Fld

mar. 9/9

5:45 pm-5:39 am

1 stop9h 54m

Baltimore/Washington

jue. 9/18

7:00 am-3:00 pm

1 stop10h 00m

$220

BoiseWashington, D.C.

BOI - DCA

BOIDCA

Boise Air Term. Gowen Fld

jue. 9/18

7:07 am-9:59 pm

1 stop12h 52m

Washington, D.C. Reagan-National

mar. 9/23

5:06 pm-12:08 am

1 stop9h 02m

$226

Flights are sorted by cheapest round-trip flights 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 $344. 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 $361.

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.

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

You are more likely to see cheaper flights to Washington, D.C. from Idaho when booking weeks ahead of your departure date. In general, you can expect to find flights to Washington, D.C. for around $438 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Washington, D.C. from Idaho for as low as $354 on momondo.

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

You could potentially save up to 65% 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.

Best Price Found

$99

Fastest flight time

5h 57m

Direct flights

None

Airports in Washington, D.C.

3 airports
The best one-way flight to Washington, D.C. from Idaho in the past 72 hours is $99. The best round-trip flight deal from Idaho to Washington, D.C. found on momondo in the last 72 hours is $198.
The fastest flight from Idaho to Washington, D.C. takes 5h 57m
There are no direct flights from Idaho to Washington, D.C.. Popular non-direct routes for this connection are Boise Air Term. Gowen Fld Airport - Baltimore/Washington Airport, Spokane Airport - Washington, D.C. Dulles Intl Airport and Spokane Airport - Baltimore/Washington Airport.
There are 3 airports near Washington, D.C.: Washington, D.C. Reagan-National (DCA), Baltimore/Washington (BWI), Washington, D.C. Dulles Intl (IAD)
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  • 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
10,000 reviews
Search Alaska Airlines flights
DeltaPriceFrom $292Free CancellationRating
8.0
7,985 reviews
Search Delta flights
American AirlinesPriceFrom $300Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
United AirlinesPriceFrom $300Free CancellationRating
7.4
8,917 reviews
Search United Airlines flights
SouthwestPriceFrom $346Free 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
Arlington
National Harbor
Woodbridge
Laurel
Silver Spring
Tysons
Waldorf
Fredericksburg
Colonial Beach
Manassas
Rockville
Towson
Gaithersburg
Fairfax
Reston
Glen Burnie
Linthicum Heights
Springfield

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.

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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