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Idaho

$51+ 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 11/11. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — BOI
Oct 11 — Oct 181
Sat 10/11
Sat 10/18
1 adult, Economy
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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 September 11, 2025.

Round-trip from

$117
(Alaska Airlines)

One-way from

$51
(Southwest)

Popular in

December

Cheapest in

January

Average price

$197

Good round-trip deal

$157 or less

Good one-way deal

$98 or less
From Washington to Idaho
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One-way flight from Washington to Idaho
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Highest demand for flights based on searches. 11% potential increase in price ($28 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($6 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Price to beat on a round-trip flight from Washington to Idaho.
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Price to beat on a one-way flight from Washington to Idaho.
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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 September 11, 2025.

This Alaska Airlines deal was found by Cheapflights users on 9/8. 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.
Tue 10/147:48 pmGEG - BOI
Nonstop1h 06mAlaska Airlines
Tue 10/286:45 pmBOI - GEG
Nonstop1h 09mAlaska Airlines
Deal found 9/8$117
This Kiwi.com deal was found by Cheapflights users on 9/10. 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 10/254:17 pmGEG - BOI
Nonstop1h 12mHawaiian Airlines
Sat 11/16:45 pmBOI - GEG
Nonstop1h 09mHawaiian Airlines
Deal found 9/10$131
This Alaska Airlines deal was found by Cheapflights users on 9/9. 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.
Tue 9/307:50 amSEA - BOI
1 stop3h 13mAlaska Airlines
Wed 10/12:19 pmBOI - SEA
1 stop5h 40mAlaska Airlines
Deal found 9/9$136
This Alaska Airlines deal was found by Cheapflights users on 9/10. 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.
Tue 10/77:00 amPDX - GEG
Nonstop1h 05mAlaska Airlines
Sat 10/115:05 amGEG - PDX
Nonstop1h 15mAlaska Airlines
Deal found 9/10$137
This Hawaiian Airlines deal was found by Cheapflights users on 9/9. 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 Hawaiian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/77:48 pmGEG - BOI
Nonstop1h 06mHawaiian Airlines
Tue 10/141:50 pmBOI - GEG
Nonstop1h 13mHawaiian Airlines
Deal found 9/9$137
This Delta deal was found by Cheapflights users on 9/8. 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.
Wed 10/13:40 pmSEA - BOI
Nonstop1h 36mDelta
Sun 10/511:00 amBOI - SEA
Nonstop1h 45mDelta
Deal found 9/8$137
This Alaska Airlines deal was found by Cheapflights users on 9/9. 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.
Tue 10/711:10 pmSEA - GEG
Nonstop1h 17mAlaska Airlines
Tue 10/148:54 pmGEG - SEA
Nonstop1h 16mAlaska Airlines
Deal found 9/9$137
This Delta deal was found by Cheapflights users on 9/10. 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 10/285:30 amPDX - BOI
1 stop4h 31mDelta
Tue 11/47:40 amBOI - PDX
1 stop6h 09mDelta
Deal found 9/10$137
This Trip.com deal was found by Cheapflights users on 9/10. 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.
Tue 10/213:50 pmSEA - BOI
1 stop5h 04mAlaska Airlines
Wed 10/226:30 amBOI - SEA
Nonstop1h 43mAlaska Airlines
Deal found 9/10$138
This Kiwi.com deal was found by Cheapflights users on 9/9. 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.
Tue 10/285:30 pmPDX - BOI
1 stop3h 50mHawaiian Airlines
Sat 11/15:54 amBOI - PDX
Nonstop1h 26mHawaiian Airlines
Deal found 9/9$138
This Trip.com deal was found by Cheapflights users on 9/9. 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.
Wed 10/295:30 pmPDX - BOI
1 stop3h 50mHawaiian Airlines
Sat 11/14:06 pmBOI - PDX
Nonstop1h 25mHawaiian Airlines
Deal found 9/9$139
This Southwest deal was found by Cheapflights users on 9/9. 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.
Wed 10/18:40 amPDX - BOI
1 stop5h 30mSouthwest
Fri 10/33:55 pmBOI - PDX
1 stop8h 45mSouthwest
Deal found 9/9$140

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 September 11, 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

SpokaneBoise

GEG - BOI

GEGBOI

Spokane

Tue 10/14

7:48 pm-9:54 pm

Nonstop1h 06m

Boise Air Term. Gowen Fld

Tue 10/28

6:45 pm-6:54 pm

Nonstop1h 09m

$117

PortlandSpokane

PDX - GEG

PDXGEG

Portland

Wed 10/8

7:00 am-8:05 am

Nonstop1h 05m

Spokane

Wed 10/15

7:37 pm-8:50 pm

Nonstop1h 13m

$137

SeattleBoise

SEA - BOI

SEABOI

Seattle/Tacoma Intl

Wed 11/26

1:30 pm-4:05 pm

Nonstop1h 35m

Boise Air Term. Gowen Fld

Tue 12/2

4:45 pm-5:27 pm

Nonstop1h 42m

$137

PortlandSpokane

PDX - GEG

PDXGEG

Portland

Tue 10/7

9:59 pm-11:08 pm

Nonstop1h 09m

Spokane

Tue 10/14

5:05 am-6:20 am

Nonstop1h 15m

$137

PortlandSpokane

PDX - GEG

PDXGEG

Portland

Tue 10/7

9:59 pm-11:08 pm

Nonstop1h 09m

Spokane

Tue 10/14

12:34 pm-1:47 pm

Nonstop1h 13m

$137

SeattleSpokane

SEA - GEG

SEAGEG

Seattle/Tacoma Intl

Sat 10/11

5:30 pm-6:43 pm

Nonstop1h 13m

Spokane

Tue 10/14

9:22 am-10:50 am

Nonstop1h 28m

$137

SpokaneBoise

GEG - BOI

GEGBOI

Spokane

Wed 10/8

7:48 pm-9:54 pm

Nonstop1h 06m

Boise Air Term. Gowen Fld

Wed 10/15

7:35 am-7:42 am

Nonstop1h 07m

$137

SpokaneBoise

GEG - BOI

GEGBOI

Spokane

Sat 11/22

4:26 pm-6:39 pm

Nonstop1h 13m

Boise Air Term. Gowen Fld

Mon 12/1

10:47 pm-11:03 pm

Nonstop1h 16m

$137

SeattleSpokane

SEA - GEG

SEAGEG

Seattle/Tacoma Intl

Sat 10/18

9:25 am-10:36 am

Nonstop1h 11m

Spokane

Tue 10/21

5:24 pm-6:47 pm

Nonstop1h 23m

$137

SeattleSpokane

SEA - GEG

SEAGEG

Seattle/Tacoma Intl

Tue 10/7

11:10 pm-12:27 am

Nonstop1h 17m

Spokane

Tue 10/14

8:54 pm-10:10 pm

Nonstop1h 16m

$137

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/11

Showing 1-10 of 60 results
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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 $398). 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 September 11, 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 September 11, 2025.

The most flights from USWA to USID are scheduled on a Thursday (65 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (39 on average).

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 September 11, 2025.
Read through reviews of airlines operating flights from Washington to Idaho, such as Alaska Airlines, Delta, and Hawaiian Airlines. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
10,000 reviews

Entertainment

7.0

Food

7.1

Boarding

8.1

Comfort

7.8

Overall

8.0

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
Alaska Airlines
8.0
Very good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Entertainment

7.0

Food

7.1

Boarding

8.1

Comfort

7.8

Overall

8.0

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
Delta
8.0
Very good
7,960 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Entertainment

7.0

Food

7.1

Boarding

8.1

Comfort

7.8

Overall

8.0

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
Hawaiian Airlines
7.8
Good
2,723 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Entertainment

7.0

Food

7.1

Boarding

8.1

Comfort

7.8

Overall

8.0

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.

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 13 users in the past month. Keep an eye out for changes in search interest prior to high and low season.

  • How long is the flight from State of Washington to Idaho?

    There are many flights that can get you from State of Washington to Idaho in 1h 05m. Fly via Alaska Airlines, Hawaiian Airlines, or Delta to get the fastest option. The distance from State of Washington to Idaho is about 278 mi. All flights are typically nonstop.

  • 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 Southwest ($51), Alaska Airlines ($68), and Delta ($79).

  • 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 $398). 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.

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Alternative routes for Washington to Idaho

See prices for flight routes from nearby airports that may be better suited for you.
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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 September 11, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$98Average$458FlexibilityNo cancel feeOn-timeN/A
Hawaiian AirlinesCheapest$127Average$266FlexibilityNo cancel feeOn-time85%
Alaska AirlinesCheapest$136Average$369FlexibilityNo cancel feeOn-time75%

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