What are the cheapest airlines to fly from Washington, D.C. to Idaho one-way?

To fly one-way, consider booking your trip with Frontier, which is currently one of the cheapest options available, starting at $108. Alaska Airlines flights start at $139 while deals on Delta start at $144 one-way.

What are the most popular routes from Washington, D.C. to Idaho?

When deciding which route to take from Washington, D.C. to Idaho consider Washington, D.C. Dulles Intl - Jackson Hole, Washington, D.C. Reagan-National - Jackson Hole or Baltimore/Washington - Jackson Hole as they are the most popular.

What are the most popular airlines that fly from Washington, D.C. to Idaho?

Alaska Airlines, Delta and United Airlines are the most popular airlines when flying from Washington, D.C. to Idaho.

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

When searching for a good deal, it’s best to be prepared for potential fluctuations in price. We recommend booking at least 26 days in advance, which can save you up to 87% on flights from Washington, D.C. to Idaho compared to booking the week you need them. Waiting 26 days out may not be for everyone, so we have options available for flights within the next two weeks, with the lowest price starting at $245. For sooner than that we have options available in the next 3 days from $398.

What is the cheapest month to fly from Washington, D.C. to Idaho?

Our data shows that April tends to be the cheapest month to fly to Idaho from Washington, D.C.. Users have commonly found prices around $455 for the month, but tickets can be as low as $212. Due to multiple factors, prepare for potentially higher prices in December.

Can I find deals for flights from Washington, D.C. to Idaho that include hotel bookings?

Yes. In addition to deals on Washington, D.C. to Idaho flights, Cheapflights offers vacation packages that include both flights and hotel.

How can I find direct flights from Washington, D.C. to Idaho?

After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Washington, D.C. to Idaho.

Can I find deals for business class flights from Washington, D.C. to Idaho?

Yes. Cheapflights offers flight deals from Washington, D.C. to Idaho by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

$108+ Flights from Washington, D.C. to Idaho

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Cheap flight deals from Washington, D.C. to Idaho

Most accurate provider	FlightHub 3 stars
Most trusted provider	eDreams 3 stars
Round-trip from	$218 (Booking.com)
One-way from	$108 (Cheapflightsfares)
Popular in	December
Cheapest in	April
Average price	$304

Provider with most accurate pricing for Washington, D.C. (WAS)-Boise Air Term. Gowen Fld flight deals.

Search Deals

Provider most trusted by Cheapflights users for Washington, D.C. (WAS)-Boise Air Term. Gowen Fld flights.

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From Washington, D.C. (WAS) to Idaho

Search Deals

One-way flight from Washington, D.C. (WAS) to Idaho

Search Deals

Highest demand for flights based on searches. 15% potential increase in price ($82 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 5% potential price decrease ($24 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in April 2025

Search Deals

Find flight deals from Washington, D.C. to Idaho

Cheapest flights from Washington, D.C. to Idaho
Explore the most affordable flight options available from Washington, D.C. to Idaho. Find the lowest fares from popular airlines and budget airlines, with prices last updated on abril 30, 2025.

mié. 5/141:00 pmDCA - BOI

1 stop26h 37mFrontier

dom. 5/182:27 pmBOI - DCA

1 stop29h 32mFrontier

Deal found 4/29

$218

mié. 6/45:20 pmBWI - BOI

1 stop20h 27mFrontier

dom. 6/812:36 pmBOI - BWI

1 stop25h 49mFrontier

Deal found 4/29

$235

lun. 5/196:12 pmBWI - GEG

1 stop19h 54mFrontier

dom. 5/2511:49 amGEG - BWI

1 stop25h 39mFrontier

Deal found 4/28

$281

lun. 6/27:05 pmBWI - GEG

1 stop7h 49mAlaska Airlines

mar. 6/105:49 pmGEG - BWI

1 stop9h 40mAlaska Airlines

Deal found 4/29

$282

sáb. 9/206:15 amBWI - BOI

1 stop7h 16mUnited Airlines

sáb. 9/277:00 amBOI - BWI

1 stop6h 14mUnited Airlines

Deal found 4/29

$287

jue. 5/228:44 pmBWI - GEG

1 stop23h 29mMultiple Airlines

lun. 6/26:03 pmGEG - BWI

2 stops33h 07mMultiple Airlines

Deal found 4/28

$293

jue. 5/157:17 amBWI - BOI

1 stop30h 04mSpirit Airlines

lun. 5/1912:16 pmBOI - BWI

2 stops20h 48mSpirit Airlines

Deal found 4/29

$293

mar. 7/87:18 pmBWI - GEG

1 stop6h 54mDelta

mar. 7/2211:10 pmGEG - BWI

1 stop7h 13mDelta

Deal found 4/29

$297

mar. 7/85:59 pmDCA - GEG

1 stop8h 39mDelta

vie. 7/2511:41 amGEG - DCA

1 stop8h 53mDelta

Deal found 4/29

$297

mar. 7/86:00 amIAD - GEG

1 stop8h 11mDelta

mar. 7/2211:10 pmGEG - IAD

1 stop7h 00mDelta

Deal found 4/28

$297

jue. 5/299:00 amIAD - BOI

1 stop8h 55mAlaska Airlines

mié. 6/1112:54 pmBOI - IAD

1 stop15h 01mAlaska Airlines

Deal found 4/28

$300

sáb. 9/206:35 amIAD - BOI

1 stop9h 14mUnited Airlines

sáb. 9/277:00 amBOI - IAD

1 stop6h 32mUnited Airlines

Deal found 4/29

$301

Best flights from Washington, D.C. to Idaho
Discover carefully curated flight deals from Washington, D.C. to Idaho that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated abril 30, 2025.

mié. 5/141:00 pmDCA - BOI

1 stop26h 37mFrontier

dom. 5/182:27 pmBOI - DCA

1 stop29h 32mFrontier

Deal found 4/29

$218

lun. 6/27:05 pmBWI - GEG

1 stop7h 49mAlaska Airlines

mié. 6/115:49 pmGEG - BWI

1 stop9h 40mAlaska Airlines

Deal found 4/29

$282

jue. 5/298:55 amBWI - BOI

1 stop9h 46mUnited Airlines

mar. 6/37:07 pmBOI - BWI

1 stop8h 27mUnited Airlines

Deal found 4/28

$287

lun. 5/265:23 pmBWI - BOI

1 stop20h 28mMultiple Airlines

lun. 6/212:16 pmBOI - BWI

1 stop15h 54mMultiple Airlines

Deal found 4/28

$290

mar. 7/84:45 pmBWI - GEG

1 stop8h 15mDelta

mar. 7/227:05 pmGEG - BWI

1 stop7h 55mDelta

Deal found 4/29

$297

jue. 5/227:17 amBWI - BOI

1 stop30h 04mSpirit Airlines

lun. 5/2612:16 pmBOI - BWI

2 stops29h 23mSpirit Airlines

Deal found 4/28

$303

dom. 6/2912:25 pmBWI - GEG

1 stop7h 52mSun Country Air

jue. 7/34:53 pmGEG - BWI

1 stop15h 48mSun Country Air

Deal found 4/28

$315

sáb. 5/106:30 amIAD - BOI

1 stop9h 17mHawaiian Airlines

mar. 5/278:59 pmBOI - IAD

1 stop8h 37mHawaiian Airlines

Deal found 4/29

$329

mié. 6/185:08 amDCA - BOI

1 stop7h 48mAmerican Airlines

sáb. 6/213:35 pmBOI - DCA

1 stop7h 16mAmerican Airlines

Deal found 4/29

$336

mié. 7/301:10 pmBWI - BOI

2 stops13h 30mSouthwest

sáb. 8/93:35 pmBOI - BWI

1 stop11h 35mSouthwest

Deal found 4/28

$341

lun. 5/196:12 pmBWI - GEG

1 stop19h 54mFrontier

dom. 5/2511:49 amGEG - BWI

1 stop25h 39mFrontier

Deal found 4/28

$281

jue. 5/228:44 pmBWI - GEG

1 stop23h 29mMultiple Airlines

lun. 6/26:03 pmGEG - BWI

2 stops33h 07mMultiple Airlines

Deal found 4/28

$293

Last-minute flights from Washington, D.C. to Idaho
Discover last-minute flight deals from Washington, D.C. to Idaho. Data last updated abril 30, 2025 and is based on user searches.

lun. 5/56:30 amIAD - BOI

1 stop9h 17mAlaska Airlines

mar. 5/132:41 pmBOI - IAD

1 stop7h 17mAlaska Airlines

Deal found 4/28

$256

lun. 5/54:10 pmBWI - BOI

1 stop7h 32mUnited Airlines

mié. 5/147:10 pmBOI - BWI

1 stop10h 07mUnited Airlines

Deal found 4/28

$287

lun. 5/54:10 pmBWI - GEG

1 stop7h 40mUnited Airlines

mié. 5/141:40 pmGEG - BWI

1 stop6h 37mUnited Airlines

Deal found 4/28

$297

lun. 5/53:30 pmDCA - BOI

1 stop9h 15mUnited Airlines

mié. 5/1411:02 amBOI - DCA

1 stop8h 32mUnited Airlines

Deal found 4/28

$301

lun. 5/52:32 pmIAD - GEG

1 stop12h 06mUnited Airlines

mié. 5/145:29 amGEG - IAD

1 stop7h 07mUnited Airlines

Deal found 4/28

$314

lun. 5/55:38 pmDCA - GEG

1 stop8h 26mAlaska Airlines

mar. 5/137:00 amGEG - DCA

1 stop10h 58mAlaska Airlines

Deal found 4/28

$343

lun. 5/57:00 amIAD - GEG

1 stop9h 33mAlaska Airlines

vie. 5/165:25 pmGEG - IAD

1 stop9h 30mAlaska Airlines

Deal found 4/28

$343

lun. 5/55:38 pmDCA - GEG

1 stop8h 26mHawaiian Airlines

jue. 5/87:00 amGEG - DCA

1 stop10h 58mHawaiian Airlines

Deal found 4/28

$346

mar. 5/612:45 pmIAD - BOI

1 stop7h 15mUnited Airlines

lun. 5/125:00 amBOI - IAD

1 stop6h 25mUnited Airlines

Deal found 4/28

$301

mar. 5/68:00 amDCA - BOI

1 stop10h 55mAlaska Airlines

mié. 5/149:18 amBOI - DCA

1 stop10h 41mAlaska Airlines

Deal found 4/28

$345

mié. 5/77:06 amBWI - BOI

1 stop8h 41mAlaska Airlines

mar. 5/136:30 amBOI - BWI

1 stop9h 35mAlaska Airlines

Deal found 4/28

$381

mié. 5/77:06 amBWI - GEG

1 stop10h 20mAlaska Airlines

mié. 5/145:49 pmGEG - BWI

1 stop8h 57mAlaska Airlines

Deal found 4/28

$383

One-way flights from Washington, D.C. to Idaho
Search for one-way flight options from Washington, D.C. to Idaho. Find affordable one-way fares based on user searches. Data last updated abril 30, 2025.

jue. 5/297:00 amDCA - BOI

1 stop6h 51mFrontier

Deal found 4/29

$108

sáb. 5/245:48 pmBWI - GEG

1 stop20h 16mFrontier

Deal found 4/29

$126

sáb. 5/246:00 pmDCA - GEG

1 stop20h 04mFrontier

Deal found 4/29

$126

mié. 7/238:10 amIAD - GEG

1 stop10h 57mAlaska Airlines

Deal found 4/27

$139

dom. 6/158:35 pmBWI - GEG

1 stop23h 32mMultiple Airlines

Deal found 4/28

$144

jue. 5/296:15 amBWI - BOI

1 stop9h 31mDelta

Deal found 4/29

$144

sáb. 8/165:02 pmDCA - GEG

1 stop8h 54mHawaiian Airlines

Deal found 4/29

$148

dom. 5/46:35 amBWI - GEG

1 stop11h 06mUnited Airlines

Deal found 4/27

$149

sáb. 7/267:50 amDCA - GEG

1 stop8h 27mDelta

Deal found 4/29

$149

dom. 5/44:00 pmIAD - GEG

1 stop10h 38mUnited Airlines

Deal found 4/27

$149

mar. 5/66:30 amIAD - BOI

1 stop9h 17mAlaska Airlines

Deal found 4/29

$150

mar. 5/68:00 amDCA - BOI

1 stop7h 47mAlaska Airlines

Deal found 4/29

$150

Cheapflights Fare Finder

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

Fly from

Fly to

Route

Depart

Return

Price

Washington, D.C.Boise

DCA - BOI

DCABOI

Washington, D.C. Reagan-National

mié. 5/14

1:00 pm-1:37 pm

1 stop26h 37m

Boise Air Term. Gowen Fld

dom. 5/18

2:27 pm-9:59 pm

1 stop29h 32m

$218

BaltimoreBoise

BWI - BOI

BWIBOI

Baltimore/Washington

mié. 6/4

5:20 pm-11:47 am

1 stop20h 27m

Boise Air Term. Gowen Fld

dom. 6/8

12:36 pm-4:25 pm

1 stop25h 49m

$235

BaltimoreSpokane

BWI - GEG

BWIGEG

Baltimore/Washington

lun. 5/19

6:12 pm-11:06 am

1 stop19h 54m

Spokane

dom. 5/25

11:49 am-4:28 pm

1 stop25h 39m

$281

BaltimoreSpokane

BWI - GEG

BWIGEG

Baltimore/Washington

lun. 6/2

7:05 pm-11:54 pm

1 stop7h 49m

Spokane

mar. 6/10

5:49 pm-6:29 am

1 stop9h 40m

$282

BaltimoreBoise

BWI - BOI

BWIBOI

Baltimore/Washington

sáb. 9/20

6:15 am-11:31 am

1 stop7h 16m

Boise Air Term. Gowen Fld

sáb. 9/27

7:00 am-3:14 pm

1 stop6h 14m

$287

BaltimoreSpokane

BWI - GEG

BWIGEG

Baltimore/Washington

jue. 5/22

8:44 pm-5:13 pm

1 stop23h 29m

Spokane

lun. 6/2

6:03 pm-6:10 am

2 stops33h 07m

$293

BaltimoreBoise

BWI - BOI

BWIBOI

Baltimore/Washington

jue. 5/15

7:17 am-11:21 am

1 stop30h 04m

Boise Air Term. Gowen Fld

lun. 5/19

12:16 pm-11:04 am

2 stops20h 48m

$293

BaltimoreSpokane

BWI - GEG

BWIGEG

Baltimore/Washington

mar. 7/8

7:18 pm-11:12 pm

1 stop6h 54m

Spokane

mar. 7/22

11:10 pm-9:23 am

1 stop7h 13m

$297

Washington, D.C.Spokane

DCA - GEG

DCAGEG

Washington, D.C. Reagan-National

mar. 7/8

5:59 pm-11:38 pm

1 stop8h 39m

Spokane

mié. 7/23

11:41 am-11:34 pm

1 stop8h 53m

$297

Washington, D.C.Spokane

IAD - GEG

IADGEG

Washington, D.C. Dulles Intl

mar. 7/8

3:30 pm-10:00 pm

1 stop9h 30m

Spokane

mar. 7/22

7:26 pm-5:57 am

1 stop7h 31m

$297

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/29

Showing 1-10 of 60 results

...

Best time to book a flight from Washington, D.C. to Idaho

Have a flexible travel schedule? Discover the best time to fly to Idaho from Washington, D.C. with our price prediction graph.

Estimated round-trip price

Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Washington, D.C. to Idaho

What is the cheapest month to book a flight from Washington, D.C. to Idaho?

Currently, October is the cheapest month in which you can book a flight from Washington, D.C. to Idaho (average of $314). Flying from Washington, D.C. to Idaho in June is currently the most expensive (average of $406). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from WAS to ID?

When flying from Washington, D.C. to Idaho, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Rainfall in Idaho by month

In terms of precipitation, rainfall in Idaho ranges from 0.2 - 1.6 inches per month. December is typically the wettest month, when rainfall can reach 1.6 in. August is typically the driest time to visit Idaho when rainfall is around 0.2 in.

Temperature in Idaho by month

If weather is an important factor for your trip to Idaho, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 75.2 F. Travelers looking to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 30.2 F).

Reviews of airlines servicing Idaho

To help decide which airline to fly from Washington, D.C. to Idaho, see what other customers have to say about Alaska Airlines, Southwest and Delta. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.

Alaska Airlines

8.0

Very good

9,961 reviews

Reviews

1 / 20

10.0

Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.

Alaska Airlines

8.0

Very good

9,961 reviews

Alaska Airlines

8.0

Very good

9,961 reviews

Reviews

1 / 20

10.0

Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.

Southwest

8.0

Very good

4,295 reviews

Alaska Airlines

8.0

Very good

9,961 reviews

Reviews

1 / 20

10.0

Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.

Delta

8.0

Very good

7,929 reviews

Alaska Airlines

8.0

Very good

9,961 reviews

Reviews

1 / 20

10.0

Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.

Hawaiian Airlines

7.9

Good

2,405 reviews

Alaska Airlines

8.0

Very good

9,961 reviews

Reviews

1 / 20

10.0

Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.

United Airlines

7.4

Good

8,696 reviews

Alaska Airlines

8.0

Very good

9,961 reviews

Reviews

1 / 20

10.0

Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.

Related info for your journey

What are the cheapest airlines to fly from Washington, D.C. to Idaho one-way?
To fly one-way, consider booking your trip with Frontier, which is currently one of the cheapest options available, starting at $108. Alaska Airlines flights start at $139 while deals on Delta start at $144 one-way.
What are the most popular routes from Washington, D.C. to Idaho?
When deciding which route to take from Washington, D.C. to Idaho consider Washington, D.C. Dulles Intl - Jackson Hole, Washington, D.C. Reagan-National - Jackson Hole or Baltimore/Washington - Jackson Hole as they are the most popular.
Can I find deals for flights from Washington, D.C. to Idaho that include hotel bookings?
Yes. In addition to deals on Washington, D.C. to Idaho flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from Washington, D.C. to Idaho?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Washington, D.C. to Idaho.
Can I find deals for business class flights from Washington, D.C. to Idaho?
Yes. Cheapflights offers flight deals from Washington, D.C. to Idaho by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.
What is the cheapest month to book a flight from Washington, D.C. to Idaho?
Currently, October is the cheapest month in which you can book a flight from Washington, D.C. to Idaho (average of $314). Flying from Washington, D.C. to Idaho in June is currently the most expensive (average of $406). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

Top 5 airlines flying from Washington, D.C. to Idaho

Airline	Cheapest	Average	Flexibility	On-time
Alaska Airlines	Cheapest$230	Average$485	FlexibilityNo cancel fee	On-time75%
Delta	Cheapest$230	Average$509	FlexibilityNo cancel fee	On-timeN/A
Southwest	Cheapest$274	Average$567	FlexibilityNo cancel fee	On-time63%
United Airlines	Cheapest$298	Average$652	FlexibilityNo cancel fee	On-time69%
American Airlines	Cheapest$334	Average$615	FlexibilityNo cancel fee	On-time71%

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$108+ Cheap flights from Washington, D.C. (WAS) to Idaho

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 5/29. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Washington, D.C. to Idaho with Cheapflights

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2. Select your favorite providers

3. Compare prices and book

Cheap flight deals from Washington, D.C. to Idaho

Keep the following information in mind while searching for Washington, D.C. to Idaho flight deals. Data was last updated abril 30, 2025.

Most accurate provider

Most trusted provider

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Find flight deals from Washington, D.C. to Idaho

Cheapest flights from Washington, D.C. to IdahoExplore the most affordable flight options available from Washington, D.C. to Idaho. Find the lowest fares from popular airlines and budget airlines, with prices last updated on abril 30, 2025.

Explore the most affordable flight options available from Washington, D.C. to Idaho. Find the lowest fares from popular airlines and budget airlines, with prices last updated on abril 30, 2025.

Cheapflights Fare Finder

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

Best time to book a flight from Washington, D.C. to Idaho

Have a flexible travel schedule? Discover the best time to fly to Idaho from Washington, D.C. with our price prediction graph.

Cheapflights Insights

Everything you need to know about your flight from Washington, D.C. to Idaho

What is the cheapest month to book a flight from Washington, D.C. to Idaho?

What is the cheapest time of day to fly from WAS to ID?

Find hourly flight availability from Washington, D.C. to Idaho. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated abril 30, 2025.

Rainfall in Idaho by month

Plan your trip to Idaho by taking into account the average rainfall totals by month.

Temperature in Idaho by month

Plan your trip to Idaho by taking into account the average temperature totals by month.

Reviews of airlines servicing Idaho

Get insights into the airlines that provide service to Idaho. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Idaho. Reviews last updated abril 30, 2025.

To help decide which airline to fly from Washington, D.C. to Idaho, see what other customers have to say about Alaska Airlines, Southwest and Delta. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.

Related info for your journey

Find useful and relevant information for your journey from Washington, D.C. to Idaho. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

What are the cheapest airlines to fly from Washington, D.C. to Idaho one-way?

What are the most popular routes from Washington, D.C. to Idaho?

Can I find deals for flights from Washington, D.C. to Idaho that include hotel bookings?

How can I find direct flights from Washington, D.C. to Idaho?

Can I find deals for business class flights from Washington, D.C. to Idaho?

What is the cheapest month to book a flight from Washington, D.C. to Idaho?

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Washington, D.C. to Idaho

See prices for flight routes from nearby airports that may be better suited for you.

Top 5 airlines flying from Washington, D.C. to Idaho

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Cheapest flights from Washington, D.C. to Idaho
Explore the most affordable flight options available from Washington, D.C. to Idaho. Find the lowest fares from popular airlines and budget airlines, with prices last updated on abril 30, 2025.