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$64+ Cheap flights from Idaho to Washington

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 1/10. Fares are subject to change and may not be available on all flights or dates of travel.
BOI — SEA
Jan 16 — Jan 231
Fri 1/16
Fri 1/23
1 adult, Economy
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Cheap flight deals from Idaho to Washington

Cheapest flights from Idaho to Washington
Explore the most affordable flight options available from Idaho to Washington. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 17, 2025.

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.
Tue 12/305:00 amGEG - SEA
Nonstop1h 23mDelta
Fri 1/97:45 pmSEA - GEG
Nonstop1h 13mDelta
Deal found 12/15$247
This Alaska Airlines deal was found by Cheapflights users on 12/14. 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 12/305:42 pmBOI - PUW
Nonstop1h 03mAlaska Airlines
Sat 1/36:22 pmPUW - BOI
Nonstop1h 04mAlaska Airlines
Deal found 12/14$258
This Kiwi.com 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/224:26 pmIDA - PDX
Nonstop1h 45mMultiple Airlines
Fri 1/235:35 pmPDX - IDA
1 stop4h 24mMultiple Airlines
Deal found 12/17$263
This Booking.com 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/261:26 pmIDA - PDX
Nonstop1h 45mAllegiant Air
Mon 12/2910:01 amPDX - IDA
Nonstop1h 35mAllegiant Air
Deal found 12/17$268
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.
Wed 12/3112:50 pmJAC - SEA
1 stop4h 43mDelta
Sun 1/45:25 amSEA - JAC
1 stop5h 30mDelta
Deal found 12/16$269
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 12/317:30 amBOI - SEA
Nonstop1h 54mDelta
Sun 1/47:30 pmSEA - BOI
Nonstop1h 31mDelta
Deal found 12/15$277
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.
Wed 12/241:12 pmGEG - SEA
Nonstop1h 26mDelta
Tue 1/209:35 pmSEA - GEG
Nonstop1h 17mDelta
Deal found 12/16$277
This Alaska Airlines 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/2910:47 pmBOI - GEG
Nonstop1h 19mAlaska Airlines
Thu 1/19:00 amGEG - BOI
Nonstop1h 13mAlaska Airlines
Deal found 12/15$277
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.
Wed 12/175:05 amGEG - SEA
Nonstop1h 23mDelta
Tue 1/67:45 pmSEA - GEG
Nonstop1h 13mDelta
Deal found 12/16$292
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.
Mon 12/229:16 amGEG - SEA
Nonstop1h 35mDelta
Wed 1/71:50 pmSEA - GEG
Nonstop1h 10mDelta
Deal found 12/15$297
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 12/313:28 pmGEG - PDX
Nonstop1h 22mAlaska Airlines
Thu 1/110:32 amPDX - GEG
Nonstop1h 07mAlaska Airlines
Deal found 12/16$298
This Booking.com 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/194:26 pmIDA - PDX
Nonstop1h 45mAllegiant Air
Mon 12/2910:01 amPDX - IDA
Nonstop1h 35mAllegiant Air
Deal found 12/16$302

Find flight deals from Idaho to Washington

Keep the following information in mind while searching for Idaho to Washington flight deals. Data was last updated December 17, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$98
(Kiwi.com)

One-way from

$64
(Kiwi.com)

Popular in

March

Cheapest in

January

Average price

$187

Good round-trip deal

$207 or less

Good one-way deal

$118 or less
Provider with most accurate pricing for Boise Air Term. Gowen Fld-Seattle/Tacoma Intl flight deals.
Search Deals
Provider most trusted by Cheapflights users for Boise Air Term. Gowen Fld-Seattle/Tacoma Intl flights.
Search Deals
From Idaho to Washington
Search Deals
One-way flight from Idaho to Washington
Search Deals
High demand for flights, 0% potential price rise
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($2 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 Idaho to Washington.
Search Deals
Price to beat on a one-way flight from Idaho to Washington.
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Idaho to Washington 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 17, 2025.
Use the filters below to find and compare flights from Idaho to Washington that are best for you.

Fly from

Idaho

Fly to

Washington

Route

Depart

Return

Price

BoiseSeattle

BOI - SEA

BOISEA

Boise Air Term. Gowen Fld

Thu 1/8

5:40 am-6:36 am

Nonstop1h 56m

Seattle/Tacoma Intl

Sat 1/10

10:25 am-1:00 pm

Nonstop1h 35m

$99

SpokaneSeattle

GEG - SEA

GEGSEA

Spokane

Wed 2/18

12:00 pm-1:17 pm

Nonstop1h 17m

Seattle/Tacoma Intl

Sat 2/21

8:30 pm-9:37 pm

Nonstop1h 07m

$99

BoiseSeattle

BOI - SEA

BOISEA

Boise Air Term. Gowen Fld

Fri 1/23

9:15 am-10:14 am

Nonstop1h 59m

Seattle/Tacoma Intl

Sun 1/25

7:20 am-9:57 am

Nonstop1h 37m

$99

SpokaneSeattle

GEG - SEA

GEGSEA

Spokane

Fri 1/23

12:10 pm-1:28 pm

Nonstop1h 18m

Seattle/Tacoma Intl

Tue 1/27

9:59 am-11:12 am

Nonstop1h 13m

$99

BoiseSeattle

BOI - SEA

BOISEA

Boise Air Term. Gowen Fld

Sat 2/7

7:25 am-8:20 am

Nonstop1h 55m

Seattle/Tacoma Intl

Fri 2/20

5:45 pm-8:10 pm

Nonstop1h 25m

$99

BoiseSeattle

BOI - SEA

BOISEA

Boise Air Term. Gowen Fld

Sun 1/11

10:39 am-11:35 am

Nonstop1h 56m

Seattle/Tacoma Intl

Sat 1/17

3:59 pm-6:28 pm

Nonstop1h 29m

$99

BoiseSeattle

BOI - SEA

BOISEA

Boise Air Term. Gowen Fld

Thu 3/5

10:41 am-11:35 am

Nonstop1h 54m

Seattle/Tacoma Intl

Wed 3/11

9:30 pm-11:59 pm

Nonstop1h 29m

$99

BoiseSeattle

BOI - SEA

BOISEA

Boise Air Term. Gowen Fld

Fri 1/30

1:40 pm-2:36 pm

Nonstop1h 56m

Seattle/Tacoma Intl

Mon 2/2

7:30 pm-9:58 pm

Nonstop1h 28m

$99

BoiseSeattle

BOI - SEA

BOISEA

Boise Air Term. Gowen Fld

Fri 1/16

7:25 am-8:20 am

Nonstop1h 55m

Seattle/Tacoma Intl

Sun 1/18

10:25 am-1:00 pm

Nonstop1h 35m

$99

BoiseSeattle

BOI - SEA

BOISEA

Boise Air Term. Gowen Fld

Fri 2/6

7:15 pm-8:13 pm

Nonstop1h 58m

Seattle/Tacoma Intl

Sun 2/8

5:45 pm-8:12 pm

Nonstop1h 27m

$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 Idaho to Washington

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

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

Currently, January is the cheapest month in which you can book a flight from Idaho to State of Washington (average of $99). Flying from Idaho to State of Washington in March is currently the most expensive (average of $137). 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 ID to WA?

Find hourly flight availability from Idaho to Washington. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated December 17, 2025.

One of the essential ways to save on airfare from Idaho to State of Washington is to remain as flexible as possible. Flights that are at noon tend to be the most expensive. A flight in the evening could potentially save you up to 32% on airfare.

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

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

Travelers seeking maximum savings on their Idaho to State of Washington flight should consider departing on Thursday at noon 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.

Weekly flight availability from Idaho to State of Washington

Explore weekly flight availability from Idaho to Washington. 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 December 17, 2025.

The most flights from USID to USWA are scheduled on a Wednesday (50 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (1 on average).

Reviews of airlines servicing Washington

Get insights into the airlines that provide service to Washington. 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 Washington. Reviews last updated December 17, 2025.
Get a feel of what it's like to fly with Alaska Airlines, Delta, and Hawaiian Airlines from Idaho to Washington by reading reviews from past customers. 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
11,474 reviews

Entertainment

7.0

Comfort

7.8

Overall

8.0

Boarding

8.1

Food

7.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Anonymous,Dec 2025

SJC - SEA

The flight was great. Don’t have to make it better. Everything was OK.
Alaska Airlines
8.0
Very good
11,474 reviews
Alaska Airlines
8.0
Very good
11,474 reviews

Entertainment

7.0

Comfort

7.8

Overall

8.0

Boarding

8.1

Food

7.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Anonymous,Dec 2025

SJC - SEA

The flight was great. Don’t have to make it better. Everything was OK.
Delta
7.9
Good
8,006 reviews
Alaska Airlines
8.0
Very good
11,474 reviews

Entertainment

7.0

Comfort

7.8

Overall

8.0

Boarding

8.1

Food

7.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Anonymous,Dec 2025

SJC - SEA

The flight was great. Don’t have to make it better. Everything was OK.
Hawaiian Airlines
7.8
Good
2,819 reviews
Alaska Airlines
8.0
Very good
11,474 reviews

Entertainment

7.0

Comfort

7.8

Overall

8.0

Boarding

8.1

Food

7.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Anonymous,Dec 2025

SJC - SEA

The flight was great. Don’t have to make it better. Everything was OK.

Related info for your journey

Find useful and relevant information for your journey from Idaho to Washington. 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 Idaho to State of Washington flight route?

    The Idaho to Washington flight path was viewed by 83 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 Idaho to State of Washington?

    A quick flight from Idaho to State of Washington can take about 1h 16m. Delta provides one of the quickest options available for as low as $117. Idaho and State of Washington are separated by a distance of 287 mi. Both multi-stop and nonstop flights can be found to your destination and back.

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

    The cheapest airlines for a one-way flight from Idaho to State of Washington are Hawaiian Airlines ($68), Alaska Airlines ($68), and Delta ($68).

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

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

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

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

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

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

    Currently, January is the cheapest month in which you can book a flight from Idaho to State of Washington (average of $99). Flying from Idaho to State of Washington in March is currently the most expensive (average of $137). 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

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Alternative routes for Idaho to Washington

See prices for flight routes from nearby airports that may be better suited for you.
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Top 3 airlines flying from Idaho to Washington

Discover the top 3 airlines that operate flights from Idaho to Washington. 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 17, 2025.
AirlineCheapestAverageFlexibilityOn-time
Alaska AirlinesCheapest$99Average$301FlexibilityNo cancel feeOn-time75%
DeltaCheapest$117Average$340FlexibilityNo cancel feeOn-timeN/A
Hawaiian AirlinesCheapest$117Average$279FlexibilityNo cancel feeOn-time85%

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