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Idaho

$68+ 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 1/14. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — BOI
Jan 17 — Jan 241
Sat 1/17
Sat 1/24
1 adult, Economy
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Cheap 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 December 18, 2025.

This Delta deal was found by Cheapflights users on 12/16. 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.
Fri 12/267:45 amSEA - BOI
Nonstop1h 35mDelta
Tue 1/205:15 pmBOI - SEA
Nonstop1h 53mDelta
Deal found 12/16$247
This Alaska Airlines deal was found by Cheapflights users on 12/16. 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.
Fri 12/264:59 pmSEA - BOI
1 stop5h 58mAlaska Airlines
Tue 1/207:00 amBOI - SEA
1 stop4h 28mAlaska Airlines
Deal found 12/16$266
This Alaska Airlines deal was found by Cheapflights users on 12/17. 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.
Wed 12/317:13 amPDX - GEG
Nonstop1h 07mAlaska Airlines
Sun 1/49:00 amGEG - PDX
Nonstop1h 26mAlaska Airlines
Deal found 12/17$298
This Delta deal was found by Cheapflights users on 12/16. 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.
Mon 12/229:35 pmSEA - BOI
Nonstop1h 29mDelta
Tue 1/205:15 pmBOI - SEA
Nonstop1h 53mDelta
Deal found 12/16$307
This Delta deal was found by Cheapflights users on 12/17. 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.
Fri 12/265:30 amPDX - GEG
1 stop3h 01mDelta
Thu 1/296:05 amGEG - PDX
1 stop4h 02mDelta
Deal found 12/17$312
This Alaska Airlines deal was found by Cheapflights users on 12/16. 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.
Wed 12/313:43 pmSEA - BOI
Nonstop1h 22mAlaska Airlines
Sat 1/39:55 amBOI - SEA
Nonstop1h 43mAlaska Airlines
Deal found 12/16$317
This Alaska Airlines deal was found by Cheapflights users on 12/16. 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.
Wed 12/313:54 pmSEA - GEG
Nonstop1h 03mAlaska Airlines
Fri 1/27:42 pmGEG - SEA
Nonstop1h 17mAlaska Airlines
Deal found 12/16$317
This Delta deal was found by Cheapflights users on 12/15. 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 12/315:30 amPDX - GEG
1 stop3h 01mDelta
Sun 1/47:23 pmGEG - PDX
1 stop4h 32mDelta
Deal found 12/15$318
This Alaska Airlines deal was found by Cheapflights users on 12/16. 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 12/307:06 amPDX - BOI
Nonstop1h 09mAlaska Airlines
Fri 1/24:16 pmBOI - PDX
Nonstop1h 28mAlaska Airlines
Deal found 12/16$318
This Alaska Airlines deal was found by Cheapflights users on 12/16. 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 12/165:06 pmSEA - BOI
1 stop5h 53mAlaska Airlines
Tue 1/207:00 amBOI - SEA
1 stop4h 28mAlaska Airlines
Deal found 12/16$326
This Alaska Airlines deal was found by Cheapflights users on 12/17. 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.
Fri 12/2610:32 amPDX - GEG
Nonstop1h 07mAlaska Airlines
Thu 1/294:57 pmGEG - PDX
1 stop3h 46mAlaska Airlines
Deal found 12/17$327
This Delta deal was found by Cheapflights users on 12/17. 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.
Thu 12/254:40 pmSEA - BOI
Nonstop1h 27mDelta
Wed 12/315:40 amBOI - SEA
Nonstop1h 57mDelta
Deal found 12/17$327

Find flight deals from Washington to Idaho

Keep the following information in mind while searching for Washington to Idaho flight deals. Data was last updated December 18, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$98
(Kiwi.com)

One-way from

$68
(Alaska Airlines)

Popular in

December

Cheapest in

January

Average price

$267

Good round-trip deal

$99 or less

Good one-way deal

$109 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. 1% potential increase in price ($4 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($6 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 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

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 December 18, 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

SeattleBoise

SEA - BOI

SEABOI

Seattle/Tacoma Intl

Wed 2/18

6:48 pm-9:15 pm

Nonstop1h 27m

Boise Air Term. Gowen Fld

Sat 2/21

6:28 am-7:13 am

Nonstop1h 45m

$99

SeattleBoise

SEA - BOI

SEABOI

Seattle/Tacoma Intl

Tue 2/17

5:45 pm-8:10 pm

Nonstop1h 25m

Boise Air Term. Gowen Fld

Tue 2/24

1:51 pm-2:45 pm

Nonstop1h 54m

$99

SeattleBoise

SEA - BOI

SEABOI

Seattle/Tacoma Intl

Tue 2/17

1:50 pm-4:15 pm

Nonstop1h 25m

Boise Air Term. Gowen Fld

Sun 2/22

7:30 am-8:25 am

Nonstop1h 55m

$99

SeattleSpokane

SEA - GEG

SEAGEG

Seattle/Tacoma Intl

Fri 1/9

9:59 am-11:12 am

Nonstop1h 13m

Spokane

Sat 1/10

12:10 pm-1:28 pm

Nonstop1h 18m

$99

SeattleBoise

SEA - BOI

SEABOI

Seattle/Tacoma Intl

Tue 1/13

10:25 am-1:00 pm

Nonstop1h 35m

Boise Air Term. Gowen Fld

Mon 1/19

9:15 am-10:14 am

Nonstop1h 59m

$99

SeattleSpokane

SEA - GEG

SEAGEG

Seattle/Tacoma Intl

Tue 1/13

8:17 pm-9:25 pm

Nonstop1h 08m

Spokane

Tue 1/20

5:45 am-7:06 am

Nonstop1h 21m

$99

SeattleBoise

SEA - BOI

SEABOI

Seattle/Tacoma Intl

Sat 1/17

7:30 pm-9:58 pm

Nonstop1h 28m

Boise Air Term. Gowen Fld

Mon 1/19

7:25 am-8:20 am

Nonstop1h 55m

$99

SeattleSpokane

SEA - GEG

SEAGEG

Seattle/Tacoma Intl

Fri 2/27

10:53 pm-11:59 pm

Nonstop1h 06m

Spokane

Sun 3/1

8:10 am-9:34 am

Nonstop1h 24m

$99

SeattleBoise

SEA - BOI

SEABOI

Seattle/Tacoma Intl

Sat 2/21

5:45 pm-8:10 pm

Nonstop1h 25m

Boise Air Term. Gowen Fld

Sun 2/22

7:30 am-8:25 am

Nonstop1h 55m

$99

SeattleBoise

SEA - BOI

SEABOI

Seattle/Tacoma Intl

Thu 2/19

10:40 am-1:11 pm

Nonstop1h 31m

Boise Air Term. Gowen Fld

Sat 2/21

7:30 am-8:25 am

Nonstop1h 55m

$99

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/16

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, January is the cheapest month in which you can book a flight from State of Washington to Idaho (average of $77). Flying from State of Washington to Idaho in July is currently the most expensive (average of $175). 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 December 18, 2025.

It’s optimal to fly from State of Washington to Idaho in the evening. By choosing this option you can save up to 31% on the cost of your flight, compared to a flight in the morning.

What is the cheapest day to fly from State of Washington to Idaho?

Use this chart to determine the cheapest time to fly round-trip from Washington to Idaho. Price data was last updated on December 16, 2024.

Travelers seeking maximum savings on their State of Washington to Idaho flight should consider departing on Friday evenings when fares are most often at their lowest. Sunday mornings flights should be avoided if possible as fares are typically the most expensive at this time.

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 December 18, 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
11,479 reviews

Entertainment

7.0

Food

7.1

Overall

8.0

Crew

8.5

Comfort

7.8

Boarding

8.1

Reviews

1 / 20
8.0
Excellent

Anonymous,Sep 2025

SEA - MKE

The crew were excellent, flight good, but the actual space for a person to occupy for 4 hours seems to get smaller and smaller 🤣. I am not overweight, and average height….very uncomfortable,, especially when I couldn’t recliner the seat at all, and the pocket in front doesn’t accommodate a water bottle.
Alaska Airlines
8.0
Very good
11,479 reviews
Alaska Airlines
8.0
Very good
11,479 reviews

Entertainment

7.0

Food

7.1

Overall

8.0

Crew

8.5

Comfort

7.8

Boarding

8.1

Reviews

1 / 20
8.0
Excellent

Anonymous,Sep 2025

SEA - MKE

The crew were excellent, flight good, but the actual space for a person to occupy for 4 hours seems to get smaller and smaller 🤣. I am not overweight, and average height….very uncomfortable,, especially when I couldn’t recliner the seat at all, and the pocket in front doesn’t accommodate a water bottle.
Delta
7.9
Good
8,009 reviews
Alaska Airlines
8.0
Very good
11,479 reviews

Entertainment

7.0

Food

7.1

Overall

8.0

Crew

8.5

Comfort

7.8

Boarding

8.1

Reviews

1 / 20
8.0
Excellent

Anonymous,Sep 2025

SEA - MKE

The crew were excellent, flight good, but the actual space for a person to occupy for 4 hours seems to get smaller and smaller 🤣. I am not overweight, and average height….very uncomfortable,, especially when I couldn’t recliner the seat at all, and the pocket in front doesn’t accommodate a water bottle.
Hawaiian Airlines
7.8
Good
2,820 reviews
Alaska Airlines
8.0
Very good
11,479 reviews

Entertainment

7.0

Food

7.1

Overall

8.0

Crew

8.5

Comfort

7.8

Boarding

8.1

Reviews

1 / 20
8.0
Excellent

Anonymous,Sep 2025

SEA - MKE

The crew were excellent, flight good, but the actual space for a person to occupy for 4 hours seems to get smaller and smaller 🤣. I am not overweight, and average height….very uncomfortable,, especially when I couldn’t recliner the seat at all, and the pocket in front doesn’t accommodate a water bottle.

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 8 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 13m. Fly via Alaska Airlines, Delta, or Hawaiian Airlines to get the fastest option. The distance from State of Washington to Idaho is about 287 mi. All flights are typically nonstop.

  • 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, January is the cheapest month in which you can book a flight from State of Washington to Idaho (average of $77). Flying from State of Washington to Idaho in July is currently the most expensive (average of $175). 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

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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 December 18, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$99Average$440FlexibilityNo cancel feeOn-timeN/A
Alaska AirlinesCheapest$116Average$312FlexibilityNo cancel feeOn-time75%
Hawaiian AirlinesCheapest$117Average$271FlexibilityNo cancel feeOn-time85%

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