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$60+ 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 10/14. Fares are subject to change and may not be available on all flights or dates of travel.
BOI — SEA
Oct 16 — Oct 231
Thu 10/16
Thu 10/23
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 September 16, 2025.

Round-trip from

$101
(Booking.com)

One-way from

$60
(Delta)

Popular in

November

Cheapest in

February

Average price

$197

Good round-trip deal

$157 or less

Good one-way deal

$138 or less
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. 5% potential increase in price ($12 potential increase over avg. RT price).
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Cheapest flight prices on average. 1% potential price decrease ($3 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 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 September 16, 2025.

This Booking.com deal was found by Cheapflights users on 9/15. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/53:26 pmIDA - PDX
Nonstop1h 45mAllegiant Air
Mon 12/812:01 pmPDX - IDA
Nonstop1h 35mAllegiant Air
Deal found 9/15$101
This Kiwi.com deal was found by Cheapflights users on 9/14. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/115:38 pmBOI - SEA
Nonstop1h 37mHawaiian Airlines
Mon 10/139:30 pmSEA - BOI
Nonstop1h 26mHawaiian Airlines
Deal found 9/14$126
This Hawaiian Airlines deal was found by Cheapflights users on 9/15. 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 Hawaiian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/115:38 pmBOI - SEA
Nonstop1h 37mHawaiian Airlines
Tue 10/143:50 pmSEA - BOI
1 stop5h 04mHawaiian Airlines
Deal found 9/15$127
This Kiwi.com deal was found by Cheapflights users on 9/14. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/297:30 amBOI - GEG
Nonstop1h 11mHawaiian Airlines
Wed 11/58:55 amGEG - BOI
Nonstop1h 08mHawaiian Airlines
Deal found 9/14$128
This Cheapflightsfares deal was found by Cheapflights users on 9/15. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/99:00 amBOI - SEA
Nonstop1h 42mAlaska Airlines
Sat 10/111:21 pmSEA - BOI
Nonstop1h 24mAlaska Airlines
Deal found 9/15$132
This Cheapflightsfares deal was found by Cheapflights users on 9/15. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/155:05 amGEG - PDX
Nonstop1h 15mAlaska Airlines
Wed 10/227:00 amPDX - GEG
Nonstop1h 05mAlaska Airlines
Deal found 9/15$132
This Alaska Airlines deal was found by Cheapflights users on 9/16. 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.
Sat 10/111:50 pmBOI - SEA
1 stop6h 20mAlaska Airlines
Tue 10/143:50 pmSEA - BOI
1 stop5h 04mAlaska Airlines
Deal found 9/16$136
This Delta deal was found by Cheapflights users on 9/15. 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.
Sat 12/131:54 pmBOI - SEA
Nonstop1h 51mDelta
Sun 1/47:45 amSEA - BOI
Nonstop1h 36mDelta
Deal found 9/15$137
This Alaska Airlines deal was found by Cheapflights users on 9/16. 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 10/1512:34 pmGEG - PDX
Nonstop1h 13mAlaska Airlines
Tue 10/217:00 amPDX - GEG
Nonstop1h 05mAlaska Airlines
Deal found 9/16$137
This Hawaiian Airlines deal was found by Cheapflights users on 9/15. 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 Hawaiian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/221:50 pmBOI - GEG
Nonstop1h 13mHawaiian Airlines
Sat 10/254:17 pmGEG - BOI
Nonstop1h 12mHawaiian Airlines
Deal found 9/15$137
This SmartFares deal was found by Cheapflights users on 9/15. 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 SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/87:30 amBOI - GEG
Nonstop1h 11mHawaiian Airlines
Mon 11/108:45 amGEG - BOI
1 stop6h 32mHawaiian Airlines
Deal found 9/15$140
This Southwest deal was found by Cheapflights users on 9/16. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/76:20 amBOI - SEA
1 stop6h 25mSouthwest
Tue 10/71:20 pmSEA - BOI
1 stop8h 45mSouthwest
Deal found 9/16$142

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 September 16, 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

SpokanePortland

GEG - PDX

GEGPDX

Spokane

Wed 10/15

5:05 am-6:20 am

Nonstop1h 15m

Portland

Wed 10/22

7:00 am-8:05 am

Nonstop1h 05m

$132

BoiseSeattle

BOI - SEA

BOISEA

Boise Air Term. Gowen Fld

Tue 3/3

1:30 pm-4:54 pm

1 stop4h 24m

Seattle/Tacoma Intl

Wed 3/4

8:00 am-12:44 pm

1 stop3h 44m

$136

BoiseSeattle

BOI - SEA

BOISEA

Boise Air Term. Gowen Fld

Thu 11/13

5:17 am-6:15 am

Nonstop1h 58m

Seattle/Tacoma Intl

Tue 11/18

10:35 am-1:09 pm

Nonstop1h 34m

$137

SpokanePortland

GEG - PDX

GEGPDX

Spokane

Wed 10/15

7:37 pm-8:50 pm

Nonstop1h 13m

Portland

Tue 10/21

7:00 am-8:05 am

Nonstop1h 05m

$137

BoiseSeattle

BOI - SEA

BOISEA

Boise Air Term. Gowen Fld

Sat 10/11

2:00 pm-2:45 pm

Nonstop1h 45m

Seattle/Tacoma Intl

Thu 10/16

9:35 pm-12:08 am

Nonstop1h 33m

$137

SpokanePortland

GEG - PDX

GEGPDX

Spokane

Tue 10/14

7:37 pm-8:50 pm

Nonstop1h 13m

Portland

Tue 10/21

9:59 pm-11:08 pm

Nonstop1h 09m

$137

BoiseSeattle

BOI - SEA

BOISEA

Boise Air Term. Gowen Fld

Wed 11/12

9:00 am-10:11 am

Nonstop2h 11m

Seattle/Tacoma Intl

Sun 11/16

7:30 pm-10:07 pm

Nonstop1h 37m

$137

SpokanePortland

GEG - PDX

GEGPDX

Spokane

Wed 10/15

5:05 am-6:20 am

Nonstop1h 15m

Portland

Tue 10/21

9:59 pm-11:08 pm

Nonstop1h 09m

$137

BoiseSpokane

BOI - GEG

BOIGEG

Boise Air Term. Gowen Fld

Wed 10/22

9:53 pm-9:59 pm

Nonstop1h 06m

Spokane

Sat 10/25

4:17 pm-6:29 pm

Nonstop1h 12m

$137

BoiseSeattle

BOI - SEA

BOISEA

Boise Air Term. Gowen Fld

Sat 10/11

2:00 pm-2:45 pm

Nonstop1h 45m

Seattle/Tacoma Intl

Mon 10/13

9:35 pm-12:08 am

Nonstop1h 33m

$137

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/16

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 $238). Flying from Idaho to State of Washington in June is currently the most expensive (average of $387). 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 September 16, 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 September 16, 2025.

The most flights from USID to USWA are scheduled on a Tuesday (64 on average). You will have fewer flight options on Sunday, which is when the least amount of flights are scheduled (48 on average).

How much does it cost to fly round-trip from Idaho to State of Washington?

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 September 16, 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
10,000 reviews

Entertainment

7.1

Boarding

8.1

Comfort

7.8

Crew

8.5

Overall

8.0

Food

7.1

Reviews

1 / 20
10.0
Excellent

Anonymous,Aug 2025

MFR - SEA

Great smooth flight. Was hour and half late though. Don't know why
Alaska Airlines
8.0
Very good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Entertainment

7.1

Boarding

8.1

Comfort

7.8

Crew

8.5

Overall

8.0

Food

7.1

Reviews

1 / 20
10.0
Excellent

Anonymous,Aug 2025

MFR - SEA

Great smooth flight. Was hour and half late though. Don't know why
Delta
8.0
Very good
7,957 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Entertainment

7.1

Boarding

8.1

Comfort

7.8

Crew

8.5

Overall

8.0

Food

7.1

Reviews

1 / 20
10.0
Excellent

Anonymous,Aug 2025

MFR - SEA

Great smooth flight. Was hour and half late though. Don't know why
Hawaiian Airlines
7.8
Good
2,724 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Entertainment

7.1

Boarding

8.1

Comfort

7.8

Crew

8.5

Overall

8.0

Food

7.1

Reviews

1 / 20
10.0
Excellent

Anonymous,Aug 2025

MFR - SEA

Great smooth flight. Was hour and half late though. Don't know why

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 77 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 13m. Alaska Airlines provides one of the quickest options available for as low as $137. Idaho and State of Washington are separated by a distance of 278 mi. Generally, flights for this route are nonstop.

  • 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 Southwest ($69).

  • 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 June is currently the most expensive (average of $387). 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 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 September 16, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$95Average$332FlexibilityNo cancel feeOn-timeN/A
Hawaiian AirlinesCheapest$117Average$275FlexibilityNo cancel feeOn-time85%
Alaska AirlinesCheapest$137Average$341FlexibilityNo cancel feeOn-time75%

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