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$69+ 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 5/20. Fares are subject to change and may not be available on all flights or dates of travel.
BOI — SEA
Apr 27 — May 41
Sun 4/27
Sun 5/4
1 adult, Economy
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Cheap flight deals from Idaho to Washington

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

Most accurate provider

FlightHub
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$137
(Delta)

One-way from

$69
(Delta)

Popular in

November

Cheapest in

October

Average price

$217

Good round-trip deal

$197 or less

Good one-way deal

$98 or less
Provider with most accurate pricing for Boise Air Term. Gowen Fld-Seattle/Tacoma Intl flight deals.
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Provider most trusted by Cheapflights users for Boise Air Term. Gowen Fld-Seattle/Tacoma Intl flights.
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From Idaho to Washington
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One-way flight from Idaho to Washington
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Highest demand for flights based on searches. 2% potential increase in price ($5 potential increase over avg. RT price).
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Cheapest flight prices on average. 0% potential price decrease ($3 potential savings vs. average RT price).
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Average for round-trip flights in April 2025
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Price to beat on a round-trip flight from Idaho to Washington.
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Price to beat on a one-way flight from Idaho to Washington.
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Find 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 April 22, 2025.

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.
Wed 6/47:49 pmBOI - SEA
Nonstop1h 48mDelta
Wed 6/117:20 amSEA - BOI
Nonstop1h 38mDelta
Deal found 4/21$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 5/1711:33 amGEG - SEA
Nonstop1h 09mHawaiian Airlines
Sun 5/183:51 pmSEA - GEG
Nonstop1h 03mHawaiian Airlines
Deal found 4/21$141
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.
Sat 5/171:45 pmGEG - SEA
Nonstop1h 10mMultiple Airlines
Sun 5/183:51 pmSEA - GEG
Nonstop1h 03mMultiple Airlines
Deal found 4/21$144
This Hawaiian 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 Hawaiian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/245:39 pmBOI - SEA
Nonstop1h 30mHawaiian Airlines
Mon 5/2612:37 pmSEA - BOI
Nonstop1h 29mHawaiian Airlines
Deal found 4/21$147
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.
Sat 5/175:00 amGEG - SEA
Nonstop1h 20mDelta
Sun 5/188:45 amSEA - GEG
Nonstop1h 13mDelta
Deal found 4/21$147
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.
Sun 6/155:43 pmBOI - SEA
Nonstop1h 37mAlaska Airlines
Sun 6/158:14 pmSEA - BOI
Nonstop1h 32mAlaska Airlines
Deal found 4/21$151
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.
Sun 6/13:02 pmGEG - SEA
Nonstop1h 12mAlaska Airlines
Sun 6/18:09 pmSEA - GEG
Nonstop1h 02mAlaska Airlines
Deal found 4/21$151
This Hawaiian 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 Hawaiian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/204:01 pmBOI - PDX
Nonstop1h 19mHawaiian Airlines
Tue 5/279:49 pmPDX - BOI
Nonstop1h 10mHawaiian Airlines
Deal found 4/21$157
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 5/207:49 pmBOI - GEG
1 stop5h 16mDelta
Tue 5/273:30 pmGEG - BOI
1 stop4h 36mDelta
Deal found 4/22$157
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 5/203:30 pmGEG - PDX
1 stop5h 22mDelta
Tue 5/271:21 pmPDX - GEG
1 stop3h 39mDelta
Deal found 4/21$157
This Frontier 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/152:57 pmBOI - SEA
1 stop10h 47mFrontier
Sun 5/186:05 amSEA - BOI
1 stop6h 32mFrontier
Deal found 4/21$160
This Expedia 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/157:45 amBOI - SEA
Nonstop1h 30mMultiple Airlines
Sun 5/186:05 amSEA - BOI
1 stop6h 32mMultiple Airlines
Deal found 4/22$164

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 April 22, 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

Wed 6/4

7:49 pm-8:37 pm

Nonstop1h 48m

Seattle/Tacoma Intl

Wed 6/11

7:20 am-9:58 am

Nonstop1h 38m

$137

SpokaneSeattle

GEG - SEA

GEGSEA

Spokane

Sat 5/17

11:33 am-12:42 pm

Nonstop1h 09m

Seattle/Tacoma Intl

Sun 5/18

3:51 pm-4:54 pm

Nonstop1h 03m

$141

SpokaneSeattle

GEG - SEA

GEGSEA

Spokane

Sat 5/17

1:45 pm-2:55 pm

Nonstop1h 10m

Seattle/Tacoma Intl

Sun 5/18

3:51 pm-4:54 pm

Nonstop1h 03m

$144

BoiseSeattle

BOI - SEA

BOISEA

Boise Air Term. Gowen Fld

Sat 5/24

5:39 pm-6:09 pm

Nonstop1h 30m

Seattle/Tacoma Intl

Mon 5/26

12:37 pm-3:06 pm

Nonstop1h 29m

$147

SpokaneSeattle

GEG - SEA

GEGSEA

Spokane

Sat 5/17

5:00 am-6:20 am

Nonstop1h 20m

Seattle/Tacoma Intl

Sun 5/18

8:45 am-9:58 am

Nonstop1h 13m

$147

BoiseSeattle

BOI - SEA

BOISEA

Boise Air Term. Gowen Fld

Sun 6/15

5:43 pm-6:20 pm

Nonstop1h 37m

Seattle/Tacoma Intl

Sun 6/15

8:14 pm-10:46 pm

Nonstop1h 32m

$151

SpokaneSeattle

GEG - SEA

GEGSEA

Spokane

Sun 6/1

3:02 pm-4:14 pm

Nonstop1h 12m

Seattle/Tacoma Intl

Sun 6/1

8:09 pm-9:11 pm

Nonstop1h 02m

$151

BoisePortland

BOI - PDX

BOIPDX

Boise Air Term. Gowen Fld

Tue 5/20

5:30 am-5:50 am

Nonstop1h 20m

Portland

Tue 5/27

2:30 pm-4:44 pm

Nonstop1h 14m

$157

SpokanePortland

GEG - PDX

GEGPDX

Spokane

Tue 5/20

3:30 pm-8:52 pm

1 stop5h 22m

Portland

Tue 5/27

1:21 pm-5:00 pm

1 stop3h 39m

$157

BoiseSpokane

BOI - GEG

BOIGEG

Boise Air Term. Gowen Fld

Tue 5/20

9:20 pm-9:28 pm

Nonstop1h 08m

Spokane

Tue 5/27

7:53 pm-9:58 pm

Nonstop1h 05m

$157

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/21

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 $238). Flying from Idaho to State of Washington in July is currently the most expensive (average of $411). 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 April 22, 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Idaho to State of Washington as you normally would.

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 April 22, 2025.

The most flights from USID to USWA are scheduled on a Monday (60 on average). You will have fewer flight options on Wednesday, which is when the least amount of flights are scheduled (18 on average).

Rainfall in Washington by month

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

In terms of precipitation, rainfall in State of Washington ranges from 0.7 - 6.6 inches per month. November is typically the wettest month, when rainfall can reach 6.6 in. July is typically the driest time to visit State of Washington when rainfall is around 0.7 in.

Temperature in Washington by month

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

If weather is an important factor for your trip to State of Washington, 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 66.2 F. Travelers looking to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 41.0 F).

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 April 22, 2025.
Get a feel of what it's like to fly with Alaska Airlines, Southwest and Delta from Idaho to Washington by reading reviews from past customers. In addition to providing an overall rating, users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
9,906 reviews

Entertainment

7.1

Crew

8.5

Food

7.1

Boarding

8.2

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

Entertainment

7.1

Crew

8.5

Food

7.1

Boarding

8.2

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

Entertainment

7.1

Crew

8.5

Food

7.1

Boarding

8.2

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

Entertainment

7.1

Crew

8.5

Food

7.1

Boarding

8.2

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

Entertainment

7.1

Crew

8.5

Food

7.1

Boarding

8.2

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

Entertainment

7.1

Crew

8.5

Food

7.1

Boarding

8.2

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 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.

  • 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 Delta ($69), Alaska Airlines ($77), and Hawaiian Airlines ($79).

  • 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 $238). Flying from Idaho to State of Washington in July is currently the most expensive (average of $411). 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 4 airlines flying from Idaho to Washington

Discover the top 4 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 April 22, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$95Average$334FlexibilityNo cancel feeOn-timeN/A
Spirit AirlinesCheapest$98Average$164FlexibilityNo cancel feeOn-time65%
Alaska AirlinesCheapest$127Average$365FlexibilityNo cancel feeOn-time75%
Hawaiian AirlinesCheapest$137Average$207FlexibilityNo cancel feeOn-time85%

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