What is the cheapest airline that flies from Washington, D.C. Dulles Intl to Idaho?

Delta, Alaska Airlines, and Southwest are the most popular carriers operating from Washington, D.C. Dulles Intl to Idaho

What airlines fly to Idaho?

United Airlines, Delta and Southwest are the top three most popular airlines that fly to Idaho from Washington, D.C. Dulles Intl Airport according to our data. United Airlines is the first choice among our users, with 46% of people opting to fly with this airline when traveling to Idaho. Keep in mind that there are 4 different airlines that fly to Idaho on a routine basis, so you have a few additional options to choose from.

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

The number of operators available for flights from Washington, D.C. Dulles Intl Airport to Idaho is 5 as of April 2026.

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

Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Washington, D.C. Dulles Intl Airport to Idaho.

What documentation or ID do you need to fly to Idaho?

The travel and health documents you'll need for your trip to Idaho 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 Idaho. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

$131 Cheap Flights from Washington, D.C. Dulles Intl Airport to Idaho in 2026

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

Round-trip

One-way

Last minute

Cheap round-trip flights

Enter your travel dates to find the best prices.

6:10 am - 11:32 am

IAD

BOI

7h 22m

1 stop

2:05 pm - 12:55 am

BOI

IAD

8h 50m

1 stop

$263United Airlines

Wed, May 27 - Thu, May 28

6:00 am - 1:18 pm

IAD

BOI

9h 18m

1 stop

9:18 pm - 10:22 am

BOI

IAD

11h 04m

2 stops

$268Delta

Wed, May 27 - Mon, Jun 1

7:00 am - 1:12 pm

IAD

BOI

8h 12m

1 stop

11:35 pm - 9:15 am

BOI

IAD

7h 40m

1 stop

$271Delta

Wed, Apr 29 - Tue, May 5

7:00 am - 2:49 pm

IAD

GEG

10h 49m

1 stop

10:40 pm - 11:39 am

GEG

IAD

9h 59m

1 stop

$271Delta

Wed, May 6 - Tue, May 12

4:30 pm - 1:00 am

IAD

BOI

10h 30m

1 stop

6:00 am - 11:40 pm

BOI

IAD

15h 40m

2 stops

$274Southwest

Mon, May 4 - Tue, May 5

10:13 am - 2:58 pm

IAD

GEG

7h 45m

1 stop

12:57 pm - 1:17 am

GEG

IAD

9h 20m

1 stop

$275United Airlines

Wed, Aug 19 - Sat, Sep 12

4:30 pm - 12:25 am

IAD

BOI

9h 55m

2 stops

6:05 am - 10:55 pm

BOI

IAD

14h 50m

2 stops

$279Southwest

Tue, Apr 28 - Sat, May 2

1:18 pm - 11:02 pm

IAD

GEG

12h 44m

2 stops

6:00 am - 5:54 pm

GEG

IAD

8h 54m

1 stop

$280American Airlines

Sat, Sep 5 - Sat, Sep 12

6:24 am - 11:58 am

IAD

GEG

8h 34m

1 stop

6:00 am - 5:54 pm

GEG

IAD

8h 54m

1 stop

$281American Airlines

Sat, Sep 5 - Sat, Sep 12

6:14 pm - 9:38 am

IAD

SUN

17h 24m

1 stop

7:43 pm - 6:39 am

SUN

IAD

8h 56m

1 stop

$588Alaska Airlines

Tue, Jul 14 - Sun, Jul 19

Alaska Airlines flights from Washington, D.C. Dulles Intl Airport to Idaho

Our best Alaska Airlines deals on Washington, D.C. Dulles Intl Airport to Idaho flight tickets

Alaska Airlines

Aug 29

IAD7:00 amWashington, D.C. Dulles Intl

8h 30m

1 stop

GEG12:30 pmSpokane

Sep 11

GEG12:30 pmSpokane

8h 29m

1 stop

IAD11:59 pmWashington, D.C. Dulles Intl

$301

Alaska Airlines

Apr 28

IAD7:10 amWashington, D.C. Dulles Intl

10h 23m

1 stop

BOI3:33 pmBoise Air Term. Gowen Fld

May 4

BOI6:08 pmBoise Air Term. Gowen Fld

9h 42m

1 stop

IAD5:50 amWashington, D.C. Dulles Intl

$303

Alaska Airlines

Apr 28

IAD7:10 amWashington, D.C. Dulles Intl

10h 23m

1 stop

BOI3:33 pmBoise Air Term. Gowen Fld

May 6

BOI7:20 pmBoise Air Term. Gowen Fld

8h 30m

1 stop

IAD5:50 amWashington, D.C. Dulles Intl

$327

Southwest flights from Washington, D.C. Dulles Intl Airport to Idaho

Our best Southwest deals on Washington, D.C. Dulles Intl Airport to Idaho flight tickets

Southwest

May 4

IAD4:30 pmWashington, D.C. Dulles Intl

10h 30m

1 stop

BOI1:00 amBoise Air Term. Gowen Fld

May 5

BOI6:00 amBoise Air Term. Gowen Fld

15h 40m

2 stops

IAD11:40 pmWashington, D.C. Dulles Intl

$274

Southwest

Apr 28

IAD4:30 pmWashington, D.C. Dulles Intl

9h 55m

2 stops

BOI12:25 amBoise Air Term. Gowen Fld

May 2

BOI6:05 amBoise Air Term. Gowen Fld

14h 50m

2 stops

IAD10:55 pmWashington, D.C. Dulles Intl

$279

Southwest

May 29

IAD5:55 pmWashington, D.C. Dulles Intl

7h 25m

1 stop

GEG10:20 pmSpokane

Jun 1

GEG5:50 amSpokane

15h 30m

2 stops

IAD12:20 amWashington, D.C. Dulles Intl

$303

momondo Fare Finder

Use the filters below to find and compare flights from Washington, D.C. Dulles Intl Airport to Idaho that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

Washington, D.C.Boise

IAD - BOI

IADBOI

Washington, D.C. Dulles Intl

Wed 5/27

6:10 am-11:32 am

1 stop7h 22m

Boise Air Term. Gowen Fld

Thu 5/28

2:05 pm-12:55 am

1 stop8h 50m

$263

Washington, D.C.Boise

IAD - BOI

IADBOI

Washington, D.C. Dulles Intl

Wed 5/27

6:00 am-1:18 pm

1 stop9h 18m

Boise Air Term. Gowen Fld

Mon 6/1

9:18 pm-10:22 am

2 stops11h 04m

$268

Quickest round-trip

Washington, D.C.Boise

IAD - BOI

IADBOI

Washington, D.C. Dulles Intl

Wed 4/29

7:00 am-1:12 pm

1 stop8h 12m

Boise Air Term. Gowen Fld

Tue 5/5

11:35 pm-9:15 am

1 stop7h 40m

$271

Washington, D.C.Spokane

IAD - GEG

IADGEG

Washington, D.C. Dulles Intl

Wed 5/6

7:00 am-2:49 pm

1 stop10h 49m

Spokane

Tue 5/12

10:40 pm-11:39 am

1 stop9h 59m

$271

Washington, D.C.Boise

IAD - BOI

IADBOI

Washington, D.C. Dulles Intl

Mon 5/4

4:30 pm-1:00 am

1 stop10h 30m

Boise Air Term. Gowen Fld

Tue 5/5

6:00 am-11:40 pm

2 stops15h 40m

$274

Washington, D.C.Spokane

IAD - GEG

IADGEG

Washington, D.C. Dulles Intl

Wed 8/19

10:13 am-2:58 pm

1 stop7h 45m

Spokane

Sat 9/12

12:57 pm-1:17 am

1 stop9h 20m

$275

Washington, D.C.Boise

IAD - BOI

IADBOI

Washington, D.C. Dulles Intl

Tue 4/28

4:30 pm-12:25 am

2 stops9h 55m

Boise Air Term. Gowen Fld

Sat 5/2

6:05 am-10:55 pm

2 stops14h 50m

$279

Washington, D.C.Spokane

IAD - GEG

IADGEG

Washington, D.C. Dulles Intl

Sat 9/5

1:18 pm-11:02 pm

2 stops12h 44m

Spokane

Sat 9/12

6:00 am-5:54 pm

1 stop8h 54m

$280

Washington, D.C.Spokane

IAD - GEG

IADGEG

Washington, D.C. Dulles Intl

Sat 9/5

6:24 am-11:58 am

1 stop8h 34m

Spokane

Sat 9/12

6:00 am-5:54 pm

1 stop8h 54m

$281

Washington, D.C.Hailey

IAD - SUN

IADSUN

Washington, D.C. Dulles Intl

Tue 7/14

6:14 pm-9:38 am

1 stop17h 24m

Hailey Sun Valley-Friedman

Sun 7/19

7:43 pm-6:39 am

1 stop8h 56m

$588

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

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

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

Prices

Airlines

What is the cheapest month to fly to Idaho?

In general, November is the cheapest month to fly from Washington, D.C. Dulles Intl Airport to Idaho. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $308. If you don’t want to visit Idaho in November, then you should wait until December to fly from Washington, D.C. Dulles Intl Airport, when ticket prices are also cheap, with an average price of $321.

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

You could potentially save up to 72% on your flight if you consider stops on a Washington, D.C. Dulles Intl Airport to Idaho flight.

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

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

Fastest flight time	6h 26m
Direct flights	None

The fastest flight from Washington, D.C. Dulles Intl Airport to Idaho takes 6h 26m

There are no direct flights from Washington, D.C. Dulles Intl Airport to Idaho. There are no popular flight routes from Washington, D.C. Dulles Intl Airport to Idaho.

Search flight deals

Frequently asked questions about flying from Washington, D.C. Dulles Intl Airport to Idaho

When did momondo last update prices for flights from Washington, D.C. Dulles Intl Airport to Idaho?
Prices for flights from Washington, D.C. Dulles Intl Airport to Idaho refresh daily.
How many operators does momondo search for flights from Washington, D.C. Dulles Intl Airport to Idaho?
The number of operators available for flights from Washington, D.C. Dulles Intl Airport to Idaho is 5 as of April 2026.
How old do you have to be to fly from Washington, D.C. Dulles Intl Airport to Idaho?
Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Washington, D.C. Dulles Intl Airport to Idaho.
What documentation or ID do you need to fly to Idaho?
The travel and health documents you'll need for your trip to Idaho 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 Idaho. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

Best airlines flying from Washington, D.C. Dulles Intl Airport to Idaho

Compare and see reviews for airlines that fly from Washington, D.C. Dulles Intl Airport to Idaho with momondo

Airline	Rating	Free Cancellation	Price
Alaska Airlines	PriceFrom $182	Free Cancellation	Rating 7.9 12,211 reviews	Search Alaska Airlines flights
Delta	PriceFrom $237	Free Cancellation	Rating 7.9 8,406 reviews	Search Delta flights
United Airlines	PriceFrom $255	Free Cancellation	Rating 7.4 9,569 reviews	Search United Airlines flights
Southwest	PriceFrom $390	Free Cancellation	Rating 8.0 4,335 reviews	Search Southwest flights

Why use momondo?

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

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 Idaho from Washington, D.C..

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

momondo does allow users to show only those flights to Idaho from Washington, D.C. which offer a flexible booking policy as well as other useful filters and features.

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

momondo provides multiple filters to help you find the best flight to Idaho from Washington, D.C.. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

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

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