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Cheap flights from Idaho to District of Columbia 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 District of Columbia 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.
1 adult
0 bags

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Find the cheapest flights from Idaho to District of Columbia

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
Delta Logo
1:40 pm - 11:10 pm
BOI
-
IAD
7h 30m1 stop
Delta Logo
7:30 am - 4:17 pm
IAD
-
BOI
10h 47m1 stop
$287Delta
Thu, Jan 15 - Thu, Jan 22
Delta Logo
7:27 am - 11:10 pm
GEG
-
IAD
12h 43m1 stop
Delta Logo
7:30 am - 12:35 pm
IAD
-
GEG
8h 05m1 stop
$287Delta
Fri, Feb 27 - Tue, Mar 3
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
United Airlines Logo
12:43 pm - 9:17 pm
SUN
-
IAD
6h 34m1 stop
United Airlines Logo
2:24 pm - 9:29 pm
IAD
-
SUN
9h 05m1 stop
$379United Airlines
Thu, Jan 29 - Mon, Feb 2
American Airlines Logo
1:45 pm - 10:19 pm
IDA
-
IAD
6h 34m1 stop
American Airlines Logo
6:45 am - 12:27 pm
IAD
-
IDA
7h 42m1 stop
$392American Airlines
Wed, Apr 15 - Tue, Apr 21
American Airlines Logo
1:45 pm - 10:19 pm
IDA
-
IAD
6h 34m1 stop
American Airlines Logo
2:12 pm - 9:56 pm
IAD
-
IDA
9h 44m2 stops
$398American Airlines
Wed, Apr 15 - Tue, Apr 21
United Airlines Logo
2:40 pm - 11:19 pm
JAC
-
IAD
6h 39m1 stop
United Airlines Logo
2:12 pm - 8:59 pm
IAD
-
JAC
8h 47m1 stop
$401United Airlines
Thu, Feb 26 - Mon, Mar 2

Alaska Airlines flights from Idaho to District of Columbia

Our best Alaska Airlines deals on Idaho to District of Columbia flight tickets
Alaska Airlines
Jan 21
BOI6:23 amBoise Air Term. Gowen Fld
8h 03m
1 stop
IAD4:26 pmWashington, D.C. Dulles Intl
Jan 28
IAD6:04 pmWashington, D.C. Dulles Intl
20h 47m
1 stop
BOI12:51 pmBoise Air Term. Gowen Fld
$226
Find similar
Alaska Airlines
Feb 21
BOI6:28 amBoise Air Term. Gowen Fld
8h 52m
1 stop
IAD5:20 pmWashington, D.C. Dulles Intl
Feb 24
IAD7:05 amWashington, D.C. Dulles Intl
10h 03m
1 stop
BOI3:08 pmBoise Air Term. Gowen Fld
$236
Find similar
Alaska Airlines
Feb 18
BOI6:00 pmBoise Air Term. Gowen Fld
21h 20m
1 stop
IAD5:20 pmWashington, D.C. Dulles Intl
Feb 21
IAD7:05 amWashington, D.C. Dulles Intl
28h 35m
1 stop
BOI9:40 amBoise Air Term. Gowen Fld
$282
Find similar

United Airlines flights from Idaho to District of Columbia

Our best United Airlines deals on Idaho to District of Columbia flight tickets
United Airlines
Jan 27
BOI2:37 pmBoise Air Term. Gowen Fld
6h 45m
1 stop
IAD11:22 pmWashington, D.C. Dulles Intl
Jan 29
IAD2:10 pmWashington, D.C. Dulles Intl
9h 13m
1 stop
BOI9:23 pmBoise Air Term. Gowen Fld
$342
Find similar
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 29
SUN12:43 pmHailey Sun Valley-Friedman
6h 34m
1 stop
IAD9:17 pmWashington, D.C. Dulles Intl
Feb 2
IAD2:24 pmWashington, D.C. Dulles Intl
9h 05m
1 stop
SUN9:29 pmHailey Sun Valley-Friedman
$379
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Idaho to District of Columbia 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 26, 2025.
Use the filters below to find and compare flights from Idaho to District of Columbia 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 - IAD

BOIIAD

Boise Air Term. Gowen Fld

Thu 1/15

1:40 pm-11:10 pm

1 stop7h 30m

Washington, D.C. Dulles Intl

Thu 1/22

7:30 am-4:17 pm

1 stop10h 47m

$287

SpokaneWashington, D.C.

GEG - IAD

GEGIAD

Spokane

Fri 2/27

7:27 am-11:10 pm

1 stop12h 43m

Washington, D.C. Dulles Intl

Tue 3/3

7:30 am-12:35 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

HaileyWashington, D.C.

SUN - IAD

SUNIAD

Hailey Sun Valley-Friedman

Thu 1/29

12:43 pm-9:17 pm

1 stop6h 34m

Washington, D.C. Dulles Intl

Mon 2/2

2:24 pm-9:29 pm

1 stop9h 05m

$379

Idaho FallsWashington, D.C.

IDA - IAD

IDAIAD

Idaho Falls Fanning Field

Wed 4/15

1:45 pm-10:19 pm

1 stop6h 34m

Washington, D.C. Dulles Intl

Tue 4/21

6:45 am-12:27 pm

1 stop7h 42m

$392

Idaho FallsWashington, D.C.

IDA - IAD

IDAIAD

Idaho Falls Fanning Field

Wed 4/15

1:45 pm-10:19 pm

1 stop6h 34m

Washington, D.C. Dulles Intl

Tue 4/21

2:12 pm-9:56 pm

2 stops9h 44m

$398

JacksonWashington, D.C.

JAC - IAD

JACIAD

Jackson Hole

Thu 2/26

2:40 pm-11:19 pm

1 stop6h 39m

Washington, D.C. Dulles Intl

Mon 3/2

2:12 pm-8:59 pm

1 stop8h 47m

$401

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 District of Columbia from

How to get the cheapest flight ticket from Idaho to District of Columbia

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 District of Columbia?

In general, August is the cheapest month to fly from Idaho to District of Columbia. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $293. If you don’t want to visit District of Columbia in August, then you should wait until February to fly from Idaho, when ticket prices are also cheap, with an average price of $351.

What is the cheapest day to depart on your flight to District of Columbia?

The cheapest day to depart on your flight to District of Columbia is on a Saturday when prices can be found for as low as $436. This is often the case because there is less demand to fly during this day of the week. On the other hand, Sunday is the most expensive day to depart from Idaho because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $551.

What is the cheapest time of day to depart on your flight to District of Columbia?

Flying to District of Columbia from Idaho in the afternoon is the least expensive time of day to depart. momondo users have found prices as low as $433 when looking at flights departing in the afternoon. Flights to District of Columbia are more costly at noon, with an average ticket price of $547. Departure times at noon fall within the peak daily travel times, which is why tickets can be more expensive.

Can stopping save me money on Idaho to District of Columbia flights?

You could potentially save up to 62% on your flight if you consider stops on a Idaho to District of Columbia flight.

Cheap Idaho to District of Columbia flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Idaho to District of Columbia

Fastest flight time

6h 02m

Direct flights

Sun

Airports in District of Columbia

2 airports
The fastest flight from Idaho to District of Columbia takes 6h 02m
Direct flights go from Idaho to District of Columbia on Sunday. There are no airlines offering direct flights.
There are 2 airports in District of Columbia. 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 District of Columbia?

    Prices for flights from Idaho to District of Columbia are updated daily.

  • How many operators does momondo search for flights from Idaho to District of Columbia?

  • How old do you have to be to fly from Idaho to District of Columbia?

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Idaho to District of Columbia.

  • What documentation or ID do you need to fly to District of Columbia?

    The required travel and health documents for your District of Columbia trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at District of Columbia. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

Best airlines flying from Idaho to District of Columbia

Compare and see reviews for airlines that fly from Idaho to District of Columbia 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

Why use momondo?

Why should I use momondo to find a flight deal from Idaho to District of Columbia?

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from Idaho to District of Columbia. momondo saves you time and could save you money on your trip.

Can I find flights from Idaho to District of Columbia with flexible booking policies on momondo?

All flight searches from Idaho to District of Columbia on momondo can be filtered to show those which offer flexible booking policies.

How can momondo help me find flights from Idaho to District of Columbia?

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to District of Columbia from Idaho.

I’m not ready to book a flight from Idaho to District of Columbia right now. Can momondo alert me if prices change?

Yes momondo offers price alerts on flights to District of Columbia 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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