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$49+ 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 3/19. Fares are subject to change and may not be available on all flights or dates of travel.
BOI — SEA
Feb 25 — Mar 41
Tue 2/25
Tue 3/4
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 February 20, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$107
(Alaska Airlines)

One-way from

$49
(Delta)

Popular in

June

Cheapest in

October

Average price

$177

Good round-trip deal

$207 or less

Good one-way deal

$139 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
Search Deals
Highest demand for flights based on searches. 8% potential increase in price ($19 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 February 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 February 20, 2025.

This Alaska Airlines deal was found by Cheapflights users on 2/20. 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 3/189:24 pmGEG - PDX
Nonstop1h 35mAlaska Airlines
Tue 3/259:55 pmPDX - GEG
Nonstop1h 08mAlaska Airlines
Deal found 2/20$107
This Delta deal was found by Cheapflights users on 2/20. 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 3/187:24 pmGEG - PDX
1 stop4h 35mDelta
Tue 3/255:10 pmPDX - GEG
1 stop5h 39mDelta
Deal found 2/20$117
This Alaska Airlines deal was found by Cheapflights users on 2/19. 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 4/292:30 pmBOI - GEG
Nonstop1h 10mAlaska Airlines
Wed 4/3011:08 amGEG - BOI
Nonstop1h 01mAlaska Airlines
Deal found 2/19$117
This Kiwi.com deal was found by Cheapflights users on 2/20. 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 4/79:48 amBOI - GEG
Nonstop1h 04mHawaiian Airlines
Wed 4/96:15 amGEG - BOI
Nonstop1h 05mHawaiian Airlines
Deal found 2/20$123
This Hawaiian Airlines deal was found by Cheapflights users on 2/19. 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 4/99:41 pmGEG - PDX
Nonstop1h 09mHawaiian Airlines
Fri 4/189:55 pmPDX - GEG
Nonstop1h 08mHawaiian Airlines
Deal found 2/19$127
This Delta deal was found by Cheapflights users on 2/20. 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 3/266:10 amBOI - GEG
1 stop3h 59mDelta
Tue 4/16:56 pmGEG - BOI
1 stop4h 17mDelta
Deal found 2/20$137
This Southwest deal was found by Cheapflights users on 2/20. 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.
Mon 4/75:15 amBOI - GEG
1 stop5h 40mSouthwest
Wed 4/94:50 pmGEG - BOI
1 stop5h 05mSouthwest
Deal found 2/20$154
This Delta deal was found by Cheapflights users on 2/20. 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 3/269:15 amBOI - SEA
Nonstop1h 42mDelta
Sun 3/307:10 amSEA - BOI
Nonstop1h 39mDelta
Deal found 2/20$157
This Delta deal was found by Cheapflights users on 2/20. 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 3/186:15 amGEG - SEA
Nonstop1h 25mDelta
Wed 3/191:30 pmSEA - GEG
Nonstop1h 14mDelta
Deal found 2/20$157
This Alaska Airlines deal was found by Cheapflights users on 2/20. 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.
Thu 3/202:16 pmBOI - PUW
Nonstop0h 56mAlaska Airlines
Thu 3/272:54 pmPUW - BOI
Nonstop0h 53mAlaska Airlines
Deal found 2/20$157
This Delta deal was found by Cheapflights users on 2/19. 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 5/64:40 pmBOI - PDX
1 stop5h 08mDelta
Wed 5/75:45 pmPDX - BOI
1 stop5h 18mDelta
Deal found 2/19$157
This CheapOair deal was found by Cheapflights users on 2/20. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/261:31 pmBOI - SEA
1 stop20h 12mSpirit Airlines
Sun 3/309:48 amSEA - BOI
1 stop25h 48mSpirit Airlines
Deal found 2/20$158

Find flights from Idaho to Washington within your budget

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 February 20, 2025.

Fly from

Idaho

Fly to

Washington

Route

Depart

Return

Price

SpokanePortland

GEG - PDX

GEGPDX

Spokane

Tue 3/18

9:24 pm-10:59 pm

Nonstop1h 35m

Portland

Tue 3/25

9:55 pm-11:03 pm

Nonstop1h 08m

$107

BoiseSpokane

BOI - GEG

BOIGEG

Boise Air Term. Gowen Fld

Tue 4/29

2:30 pm-2:40 pm

Nonstop1h 10m

Spokane

Wed 4/30

11:08 am-1:09 pm

Nonstop1h 01m

$117

BoiseSpokane

BOI - GEG

BOIGEG

Boise Air Term. Gowen Fld

Mon 4/7

9:48 am-9:52 am

Nonstop1h 04m

Spokane

Wed 4/9

6:15 am-8:20 am

Nonstop1h 05m

$123

SpokanePortland

GEG - PDX

GEGPDX

Spokane

Wed 4/9

9:41 pm-10:50 pm

Nonstop1h 09m

Portland

Fri 4/18

9:55 pm-11:03 pm

Nonstop1h 08m

$127

SpokanePortland

GEG - PDX

GEGPDX

Spokane

Wed 3/12

9:50 am-3:23 pm

1 stop5h 33m

Portland

Thu 3/13

7:23 am-10:37 am

1 stop3h 14m

$147

BoiseSpokane

BOI - GEG

BOIGEG

Boise Air Term. Gowen Fld

Mon 4/7

5:15 am-9:55 am

1 stop5h 40m

Spokane

Wed 4/9

4:50 pm-10:55 pm

1 stop5h 05m

$154

BoiseSeattle

BOI - SEA

BOISEA

Boise Air Term. Gowen Fld

Wed 3/26

9:15 am-9:57 am

Nonstop1h 42m

Seattle/Tacoma Intl

Sun 3/30

7:10 am-9:49 am

Nonstop1h 39m

$157

SpokaneSeattle

GEG - SEA

GEGSEA

Spokane

Tue 3/18

6:15 am-7:40 am

Nonstop1h 25m

Seattle/Tacoma Intl

Wed 3/19

1:30 pm-2:44 pm

Nonstop1h 14m

$157

BoisePullman

BOI - PUW

BOIPUW

Boise Air Term. Gowen Fld

Thu 3/20

2:16 pm-2:12 pm

Nonstop0h 56m

Pullman Moscow Regional

Thu 3/27

2:54 pm-4:47 pm

Nonstop0h 53m

$157

BoisePortland

BOI - PDX

BOIPDX

Boise Air Term. Gowen Fld

Tue 5/6

4:40 pm-8:48 pm

1 stop5h 08m

Portland

Wed 5/7

5:45 pm-12:03 am

1 stop5h 18m

$157

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/20

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.

Travel insights for flights from Idaho to Washington

Get recent, data-driven insights about flights from Idaho to Washington including ideal travel times, pricing trends, and more.

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 February 20, 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 February 20, 2025.

The most flights from USID to USWA are scheduled on a Wednesday (49 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (33 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 February 20, 2025.
Get a feel of what it's like to fly with Southwest, Alaska Airlines 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.
Southwest
8.1
Very good
4,411 reviews

Entertainment

7.6

Crew

8.7

Food

7.1

Comfort

8.1

Boarding

8.2

Overall

8.1

Reviews

1 / 20

2.0
Mediocre

Anonymous,Feb 2025

MCO - STL

Cancelled at last minute, SWA unable to assist in formulating alternate plans. Wound up renting a car and driving 13 hours to beat bad weather forecast at home. Not SWA’s fault that there was significant bad weather across the country.

Southwest
8.1
Very good
4,411 reviews
Southwest
8.1
Very good
4,411 reviews

Entertainment

7.6

Crew

8.7

Food

7.1

Comfort

8.1

Boarding

8.2

Overall

8.1

Reviews

1 / 20

2.0
Mediocre

Anonymous,Feb 2025

MCO - STL

Cancelled at last minute, SWA unable to assist in formulating alternate plans. Wound up renting a car and driving 13 hours to beat bad weather forecast at home. Not SWA’s fault that there was significant bad weather across the country.

Alaska Airlines
8.0
Very good
9,692 reviews
Southwest
8.1
Very good
4,411 reviews

Entertainment

7.6

Crew

8.7

Food

7.1

Comfort

8.1

Boarding

8.2

Overall

8.1

Reviews

1 / 20

2.0
Mediocre

Anonymous,Feb 2025

MCO - STL

Cancelled at last minute, SWA unable to assist in formulating alternate plans. Wound up renting a car and driving 13 hours to beat bad weather forecast at home. Not SWA’s fault that there was significant bad weather across the country.

Delta
8.0
Very good
8,220 reviews
Southwest
8.1
Very good
4,411 reviews

Entertainment

7.6

Crew

8.7

Food

7.1

Comfort

8.1

Boarding

8.2

Overall

8.1

Reviews

1 / 20

2.0
Mediocre

Anonymous,Feb 2025

MCO - STL

Cancelled at last minute, SWA unable to assist in formulating alternate plans. Wound up renting a car and driving 13 hours to beat bad weather forecast at home. Not SWA’s fault that there was significant bad weather across the country.

Hawaiian Airlines
7.9
Good
2,317 reviews
Southwest
8.1
Very good
4,411 reviews

Entertainment

7.6

Crew

8.7

Food

7.1

Comfort

8.1

Boarding

8.2

Overall

8.1

Reviews

1 / 20

2.0
Mediocre

Anonymous,Feb 2025

MCO - STL

Cancelled at last minute, SWA unable to assist in formulating alternate plans. Wound up renting a car and driving 13 hours to beat bad weather forecast at home. Not SWA’s fault that there was significant bad weather across the country.

United Airlines
7.4
Good
8,766 reviews
Southwest
8.1
Very good
4,411 reviews

Entertainment

7.6

Crew

8.7

Food

7.1

Comfort

8.1

Boarding

8.2

Overall

8.1

Reviews

1 / 20

2.0
Mediocre

Anonymous,Feb 2025

MCO - STL

Cancelled at last minute, SWA unable to assist in formulating alternate plans. Wound up renting a car and driving 13 hours to beat bad weather forecast at home. Not SWA’s fault that there was significant bad weather across the country.

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 87 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 ($49), Spirit Airlines ($62), and Hawaiian Airlines ($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 $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 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 February 20, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$95Average$386FlexibilityNo cancel feeOn-timeN/A
Spirit AirlinesCheapest$113Average$181FlexibilityNo cancel feeOn-time65%
Alaska AirlinesCheapest$128Average$363FlexibilityNo cancel feeOn-time75%
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