HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Idaho

$69+ Cheap flights from Washington 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 5/20. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — BOI
Apr 27 — May 41
Sun 4/27
Sun 5/4
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Washington to Idaho with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheap flight deals from Washington to Idaho

Keep the following information in mind while searching for Washington to Idaho flight deals. Data was last updated April 22, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$131
(Alaska Airlines)

One-way from

$69
(Delta)

Popular in

December

Cheapest in

January

Average price

$227

Good round-trip deal

$157 or less

Good one-way deal

$98 or less
Provider with most accurate pricing for Seattle/Tacoma Intl-Boise Air Term. Gowen Fld flight deals.
Search Deals
Provider most trusted by Cheapflights users for Seattle/Tacoma Intl-Boise Air Term. Gowen Fld flights.
Search Deals
From Washington to Idaho
Search Deals
One-way flight from Washington to Idaho
Search Deals
Highest demand for flights based on searches. 7% potential increase in price ($19 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($5 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in April 2025
Search Deals
Price to beat on a round-trip flight from Washington to Idaho.
Search Deals
Price to beat on a one-way flight from Washington to Idaho.
Search Deals

Find flight deals from Washington to Idaho

Cheapest flights from Washington to Idaho
Explore the most affordable flight options available from Washington to Idaho. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 22, 2025.

This Alaska Airlines deal was found by Cheapflights users on 4/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/179:50 amSEA - GEG
Nonstop1h 03mAlaska Airlines
Sat 5/171:45 pmGEG - SEA
Nonstop1h 10mAlaska Airlines
Deal found 4/21$131
This Delta deal was found by Cheapflights users on 4/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/109:20 pmSEA - BOI
Nonstop1h 30mDelta
Sat 6/144:17 pmBOI - SEA
Nonstop1h 43mDelta
Deal found 4/22$137
This Delta deal was found by Cheapflights users on 4/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/31:32 pmSEA - GEG
Nonstop1h 18mDelta
Tue 6/107:27 pmGEG - SEA
Nonstop1h 23mDelta
Deal found 4/22$137
This Kiwi.com deal was found by Cheapflights users on 4/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/179:50 amSEA - GEG
Nonstop1h 03mHawaiian Airlines
Sun 5/188:27 amGEG - SEA
Nonstop1h 01mHawaiian Airlines
Deal found 4/21$141
This Kiwi.com deal was found by Cheapflights users on 4/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/171:37 pmSEA - BOI
Nonstop1h 18mMultiple Airlines
Sun 5/187:45 amBOI - SEA
Nonstop1h 30mMultiple Airlines
Deal found 4/22$142
This Trip.com deal was found by Cheapflights users on 4/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/172:48 pmSEA - BOI
Nonstop1h 29mHawaiian Airlines
Sun 5/187:45 amBOI - SEA
Nonstop1h 30mHawaiian Airlines
Deal found 4/22$144
This Delta deal was found by Cheapflights users on 4/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/35:40 pmPDX - BOI
1 stop5h 32mDelta
Mon 6/94:17 pmBOI - PDX
1 stop4h 05mDelta
Deal found 4/21$147
This Southwest deal was found by Cheapflights users on 4/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/205:45 amPDX - BOI
1 stop5h 00mSouthwest
Wed 5/217:15 amBOI - PDX
1 stop4h 10mSouthwest
Deal found 4/21$151
This Trip.com deal was found by Cheapflights users on 4/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/59:26 pmSEA - GEG
Nonstop0h 59mMultiple Airlines
Thu 6/126:07 pmGEG - SEA
Nonstop1h 14mMultiple Airlines
Deal found 4/21$154
This Trip.com deal was found by Cheapflights users on 4/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/66:57 pmSEA - BOI
Nonstop1h 19mAlaska Airlines
Fri 6/137:12 pmBOI - SEA
Nonstop1h 38mAlaska Airlines
Deal found 4/22$155
This Delta deal was found by Cheapflights users on 4/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/206:40 amPDX - GEG
1 stop6h 13mDelta
Tue 5/277:15 amGEG - PDX
1 stop3h 30mDelta
Deal found 4/22$157
This Delta deal was found by Cheapflights users on 4/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/101:15 pmGEG - BOI
1 stop4h 19mDelta
Tue 6/177:30 amBOI - GEG
1 stop5h 20mDelta
Deal found 4/20$157

Cheapflights Fare Finder

Customize your flight search to find flights from Washington to Idaho 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, Cheapflights users made 2,558,603 searches. Data last updated April 22, 2025.
Use the filters below to find and compare flights from Washington to Idaho that are best for you.

Fly from

Washington

Fly to

Idaho

Route

Depart

Return

Price

SeattleSpokane

SEA - GEG

SEAGEG

Seattle/Tacoma Intl

Sat 5/17

9:50 am-10:53 am

Nonstop1h 03m

Spokane

Sat 5/17

1:45 pm-2:55 pm

Nonstop1h 10m

$131

SeattleBoise

SEA - BOI

SEABOI

Seattle/Tacoma Intl

Tue 6/10

9:20 pm-11:50 pm

Nonstop1h 30m

Boise Air Term. Gowen Fld

Sat 6/14

4:17 pm-5:00 pm

Nonstop1h 43m

$137

SeattleSpokane

SEA - GEG

SEAGEG

Seattle/Tacoma Intl

Tue 6/3

1:32 pm-2:50 pm

Nonstop1h 18m

Spokane

Tue 6/10

7:27 pm-8:50 pm

Nonstop1h 23m

$137

SeattleSpokane

SEA - GEG

SEAGEG

Seattle/Tacoma Intl

Sat 5/17

9:50 am-10:53 am

Nonstop1h 03m

Spokane

Sun 5/18

8:27 am-9:28 am

Nonstop1h 01m

$141

SeattleBoise

SEA - BOI

SEABOI

Seattle/Tacoma Intl

Sat 5/17

1:37 pm-3:55 pm

Nonstop1h 18m

Boise Air Term. Gowen Fld

Sun 5/18

7:45 am-8:15 am

Nonstop1h 30m

$142

SeattleBoise

SEA - BOI

SEABOI

Seattle/Tacoma Intl

Sat 5/17

2:48 pm-5:17 pm

Nonstop1h 29m

Boise Air Term. Gowen Fld

Sun 5/18

7:45 am-8:15 am

Nonstop1h 30m

$144

PortlandBoise

PDX - BOI

PDXBOI

Portland

Tue 6/3

5:40 pm-12:12 am

1 stop5h 32m

Boise Air Term. Gowen Fld

Mon 6/9

4:17 pm-7:22 pm

1 stop4h 05m

$147

PortlandBoise

PDX - BOI

PDXBOI

Portland

Tue 5/20

5:45 am-11:45 am

1 stop5h 00m

Boise Air Term. Gowen Fld

Wed 5/21

7:15 am-10:25 am

1 stop4h 10m

$151

SeattleSpokane

SEA - GEG

SEAGEG

Seattle/Tacoma Intl

Thu 6/5

9:26 pm-10:25 pm

Nonstop0h 59m

Spokane

Thu 6/12

6:07 pm-7:21 pm

Nonstop1h 14m

$154

SeattleBoise

SEA - BOI

SEABOI

Seattle/Tacoma Intl

Fri 6/6

6:57 pm-9:16 pm

Nonstop1h 19m

Boise Air Term. Gowen Fld

Fri 6/13

7:12 pm-7:50 pm

Nonstop1h 38m

$155

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/22

Showing 1-10 of 60 results
1
2
3
...
6

Best time to book a flight from Washington to Idaho

Have a flexible travel schedule? Discover the best time to fly to Idaho from Washington 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 to Idaho

What is the cheapest month to book a flight from State of Washington to Idaho?

Currently, October is the cheapest month in which you can book a flight from State of Washington to Idaho (average of $314). Flying from State of Washington to Idaho in June is currently the most expensive (average of $419). 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 WA to ID?

Find hourly flight availability from Washington 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 April 22, 2025.

When flying from State of Washington 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.

Weekly flight availability from State of Washington to Idaho

Explore weekly flight availability from Washington to Idaho. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated April 22, 2025.

The most flights from USWA to USID are scheduled on a Tuesday (55 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (27 on average).

Rainfall in Idaho by month

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

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

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 April 22, 2025.
To help decide which airline to fly from Washington 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
9,906 reviews

Food

7.1

Crew

8.5

Boarding

8.2

Entertainment

7.1

Comfort

7.9

Overall

8.0

Reviews

1 / 20
4.0
Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >
Alaska Airlines
8.0
Very good
9,906 reviews
Alaska Airlines
8.0
Very good
9,906 reviews

Food

7.1

Crew

8.5

Boarding

8.2

Entertainment

7.1

Comfort

7.9

Overall

8.0

Reviews

1 / 20
4.0
Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >
Southwest
8.0
Very good
4,286 reviews
Alaska Airlines
8.0
Very good
9,906 reviews

Food

7.1

Crew

8.5

Boarding

8.2

Entertainment

7.1

Comfort

7.9

Overall

8.0

Reviews

1 / 20
4.0
Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >
Delta
8.0
Very good
7,920 reviews
Alaska Airlines
8.0
Very good
9,906 reviews

Food

7.1

Crew

8.5

Boarding

8.2

Entertainment

7.1

Comfort

7.9

Overall

8.0

Reviews

1 / 20
4.0
Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >
Hawaiian Airlines
7.9
Good
2,392 reviews
Alaska Airlines
8.0
Very good
9,906 reviews

Food

7.1

Crew

8.5

Boarding

8.2

Entertainment

7.1

Comfort

7.9

Overall

8.0

Reviews

1 / 20
4.0
Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >
United Airlines
7.4
Good
8,683 reviews
Alaska Airlines
8.0
Very good
9,906 reviews

Food

7.1

Crew

8.5

Boarding

8.2

Entertainment

7.1

Comfort

7.9

Overall

8.0

Reviews

1 / 20
4.0
Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >

Related info for your journey

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

  • How popular is this State of Washington to Idaho flight route?

    The Washington to Idaho flight path was viewed by 18 users in the past month. Keep an eye out for changes in search interest prior to high and low season.

  • What are the cheapest airlines to fly from State of Washington to Idaho one-way?

    The cheapest airlines for a one-way flight from State of Washington to Idaho are Delta ($69), Alaska Airlines ($71), and Southwest ($76).

  • Can I find deals for flights from Washington to Idaho that include hotel bookings?

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

  • How can I find direct flights from Washington to Idaho?

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

  • Can I find deals for business class flights from Washington to Idaho?

    Yes. Cheapflights offers flight deals from Washington 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 State of Washington to Idaho?

    Currently, October is the cheapest month in which you can book a flight from State of Washington to Idaho (average of $314). Flying from State of Washington to Idaho in June is currently the most expensive (average of $419). 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

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

Alternative routes for Washington to Idaho

See prices for flight routes from nearby airports that may be better suited for you.
Los Angeles to John F Kennedy Intl flights
Newark to Fort Lauderdale flights
John F Kennedy Intl to Los Angeles flights
John F Kennedy Intl to Miami flights
LaGuardia to Fort Lauderdale flights
Newark to Miami flights
Dallas/Fort Worth to Seattle flights
Newark to Las Vegas flights
Newark to Los Angeles flights
Dallas/Fort Worth to John F Kennedy Intl flights
LaGuardia to Miami flights
San Francisco to John F Kennedy Intl flights
Los Angeles to Seattle flights
Los Angeles to Newark flights
Newark to Orlando flights
LaGuardia to O'Hare Intl flights
Los Angeles to Honolulu flights
John F Kennedy Intl to O'Hare Intl flights
John F Kennedy Intl to Dallas/Fort Worth flights
Dallas/Fort Worth to O'Hare Intl flights
Seattle to Los Angeles flights
John F Kennedy Intl to San Francisco flights
John F Kennedy Intl to Las Vegas flights
John F Kennedy Intl to Fort Lauderdale flights
Newark to Seattle flights
San Francisco to Newark flights
John F Kennedy Intl to Seattle flights
John F Kennedy Intl to Orlando flights
Dallas/Fort Worth to LaGuardia flights
Dallas/Fort Worth to Newark flights
Newark to O'Hare Intl flights
Newark to Dallas/Fort Worth flights
LaGuardia to Atlanta flights
O'Hare Intl to LaGuardia flights
Los Angeles to LaGuardia flights
O'Hare Intl to Dallas/Fort Worth flights
O'Hare Intl to John F Kennedy Intl flights
Seattle to John F Kennedy Intl flights
Dallas/Fort Worth to Las Vegas flights
Newark to San Francisco flights
LaGuardia to Dallas/Fort Worth flights
Atlanta to LaGuardia flights
Seattle to Newark flights
Seattle to Las Vegas flights
LaGuardia to Orlando flights
O'Hare Intl to Las Vegas flights
John F Kennedy Intl to Hobby flights
LaGuardia to Los Angeles flights
Los Angeles to Boston flights
Newark to Denver flights

Top 3 airlines flying from Washington to Idaho

Discover the top 3 airlines that operate flights from Washington to Idaho. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated April 22, 2025.
AirlineCheapestAverageFlexibilityOn-time
Hawaiian AirlinesCheapest$88Average$237FlexibilityNo cancel feeOn-time85%
DeltaCheapest$98Average$447FlexibilityNo cancel feeOn-timeN/A
Alaska AirlinesCheapest$139Average$379FlexibilityNo cancel feeOn-time75%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.