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$57+ 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 12/7. Fares are subject to change and may not be available on all flights or dates of travel.
BOI — SEA
Dec 1 — Dec 81
Mon 12/1
Mon 12/8
1 adult, Economy
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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 November 1, 2025.

This Booking.com deal was found by Cheapflights users on 10/30. 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.
Mon 12/83:26 pmIDA - PDX
Nonstop1h 45mAllegiant Air
Fri 12/1212:01 pmPDX - IDA
Nonstop1h 35mAllegiant Air
Deal found 10/30$94
This Kiwi.com deal was found by Cheapflights users on 10/30. 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.
Fri 12/53:26 pmIDA - PDX
Nonstop1h 45mAllegiant Air
Fri 12/1212:01 pmPDX - IDA
Nonstop1h 35mAllegiant Air
Deal found 10/30$104
This Kiwi.com deal was found by Cheapflights users on 10/29. 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.
Fri 12/53:26 pmIDA - PDX
Nonstop1h 45mAllegiant Air
Mon 12/812:01 pmPDX - IDA
Nonstop1h 35mAllegiant Air
Deal found 10/29$107
This Delta deal was found by Cheapflights users on 10/31. 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 11/265:00 amGEG - SEA
Nonstop1h 29mDelta
Fri 11/287:45 pmSEA - GEG
Nonstop1h 16mDelta
Deal found 10/31$108
This Alaska Airlines deal was found by Cheapflights users on 10/31. 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 12/31:33 pmGEG - SEA
Nonstop1h 26mAlaska Airlines
Wed 12/35:54 pmSEA - GEG
Nonstop1h 11mAlaska Airlines
Deal found 10/31$113
This Kiwi.com deal was found by Cheapflights users on 10/30. 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.
Fri 12/53:26 pmIDA - PDX
Nonstop1h 45mAllegiant Air
Mon 12/1512:01 pmPDX - IDA
Nonstop1h 35mAllegiant Air
Deal found 10/30$115
This Alaska Airlines deal was found by Cheapflights users on 10/31. 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 11/266:09 amBOI - SEA
Nonstop1h 52mAlaska Airlines
Wed 12/37:23 pmSEA - BOI
Nonstop1h 22mAlaska Airlines
Deal found 10/31$117
This Delta deal was found by Cheapflights users on 10/29. 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 12/201:12 pmGEG - SEA
Nonstop1h 26mDelta
Wed 12/319:25 amSEA - GEG
Nonstop1h 16mDelta
Deal found 10/29$117
This Trip.com deal was found by Cheapflights users on 10/31. 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 12/612:19 pmBOI - SEA
Nonstop1h 40mAlaska Airlines
Sun 12/78:30 pmSEA - BOI
Nonstop1h 26mAlaska Airlines
Deal found 10/31$118
This Cheapflightsfares deal was found by Cheapflights users on 10/31. 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.
Sun 12/75:51 amGEG - SEA
Nonstop1h 24mAlaska Airlines
Mon 12/88:17 pmSEA - GEG
Nonstop1h 11mAlaska Airlines
Deal found 10/31$118
This Trip.com deal was found by Cheapflights users on 10/30. 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 12/61:25 pmBOI - SEA
Nonstop1h 40mHawaiian Airlines
Sun 12/78:30 pmSEA - BOI
Nonstop1h 26mHawaiian Airlines
Deal found 10/30$119
This Delta deal was found by Cheapflights users on 10/31. 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.
Sun 11/237:05 amGEG - SEA
Nonstop1h 35mDelta
Sun 11/239:35 pmSEA - GEG
Nonstop1h 15mDelta
Deal found 10/31$119

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 November 1, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$94
(Kiwi.com)

One-way from

$57
(Trip.com)

Popular in

December

Cheapest in

February

Average price

$217

Good round-trip deal

$189 or less

Good one-way deal

$167 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
Highest demand for flights based on searches. 7% potential increase in price ($15 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($3 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in November 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 November 1, 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

Idaho FallsPortland

IDA - PDX

IDAPDX

Idaho Falls Fanning Field

Mon 12/8

3:26 pm-4:11 pm

Nonstop1h 45m

Portland

Fri 12/12

12:01 pm-2:36 pm

Nonstop1h 35m

$94

BoiseSeattle

BOI - SEA

BOISEA

Boise Air Term. Gowen Fld

Wed 11/26

5:20 am-6:18 am

Nonstop1h 58m

Seattle/Tacoma Intl

Wed 12/3

4:20 pm-6:52 pm

Nonstop1h 32m

$117

BoiseSeattle

BOI - SEA

BOISEA

Boise Air Term. Gowen Fld

Wed 11/26

6:09 am-7:01 am

Nonstop1h 52m

Seattle/Tacoma Intl

Wed 12/3

7:23 pm-9:45 pm

Nonstop1h 22m

$117

BoiseSeattle

BOI - SEA

BOISEA

Boise Air Term. Gowen Fld

Wed 12/24

9:50 pm-10:35 pm

Nonstop1h 45m

Seattle/Tacoma Intl

Tue 12/30

7:59 pm-10:26 pm

Nonstop1h 27m

$117

SpokaneSeattle

GEG - SEA

GEGSEA

Spokane

Sat 12/20

1:12 pm-2:38 pm

Nonstop1h 26m

Seattle/Tacoma Intl

Wed 12/31

9:25 am-10:41 am

Nonstop1h 16m

$117

SpokaneSeattle

GEG - SEA

GEGSEA

Spokane

Sun 11/30

7:05 am-8:40 am

Nonstop1h 35m

Seattle/Tacoma Intl

Thu 12/4

7:10 am-8:33 am

Nonstop1h 23m

$119

SpokaneSeattle

GEG - SEA

GEGSEA

Spokane

Tue 12/16

5:05 am-6:28 am

Nonstop1h 23m

Seattle/Tacoma Intl

Wed 12/17

9:25 am-10:39 am

Nonstop1h 14m

$119

SpokaneSeattle

GEG - SEA

GEGSEA

Spokane

Sun 11/23

7:38 pm-9:08 pm

Nonstop1h 30m

Seattle/Tacoma Intl

Tue 11/25

7:45 pm-9:01 pm

Nonstop1h 16m

$119

BoiseSeattle

BOI - SEA

BOISEA

Boise Air Term. Gowen Fld

Sat 12/6

7:25 am-10:27 am

1 stop4h 02m

Seattle/Tacoma Intl

Sun 12/7

10:20 am-12:45 pm

Nonstop1h 25m

$125

BoiseSeattle

BOI - SEA

BOISEA

Boise Air Term. Gowen Fld

Thu 11/20

8:50 am-9:28 am

Nonstop1h 38m

Seattle/Tacoma Intl

Sat 11/22

6:40 pm-9:02 pm

Nonstop1h 22m

$127

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/31

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, February is the cheapest month in which you can book a flight from Idaho to State of Washington (average of $77). 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 November 1, 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 34% 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 October 20, 2024.

Travelers seeking maximum savings on their Idaho to State of Washington flight should consider departing on Saturday afternoons 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 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 November 1, 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
11,227 reviews

Entertainment

7.0

Boarding

8.1

Overall

8.0

Crew

8.5

Food

7.1

Comfort

7.8

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
11,227 reviews
Alaska Airlines
8.0
Very good
11,227 reviews

Entertainment

7.0

Boarding

8.1

Overall

8.0

Crew

8.5

Food

7.1

Comfort

7.8

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
7.9
Good
7,995 reviews
Alaska Airlines
8.0
Very good
11,227 reviews

Entertainment

7.0

Boarding

8.1

Overall

8.0

Crew

8.5

Food

7.1

Comfort

7.8

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
2,798 reviews
Alaska Airlines
8.0
Very good
11,227 reviews

Entertainment

7.0

Boarding

8.1

Overall

8.0

Crew

8.5

Food

7.1

Comfort

7.8

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 81 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 30m. Allegiant Air provides one of the quickest options available for as low as $108. Idaho and State of Washington are separated by a distance of 223 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 Delta ($60), Alaska Airlines ($68), and Southwest ($76).

  • 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, February is the cheapest month in which you can book a flight from Idaho to State of Washington (average of $77). 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 November 1, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$95Average$345FlexibilityNo cancel feeOn-timeN/A
Hawaiian AirlinesCheapest$117Average$279FlexibilityNo cancel feeOn-time85%
Alaska AirlinesCheapest$127Average$324FlexibilityNo cancel feeOn-time75%

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