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Idaho

$76+ Cheap flights from Washington to Idaho

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 4/17. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — BOI
Apr 22 — Apr 291
Wed 4/22
Wed 4/29
1 adult, Economy
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Cheap flight deals from Washington to Idaho

Cheapest flights from Washington to Idaho
Explore the most affordable flight options available from Washington to Idaho. Find the lowest fares from popular airlines and budget airlines, with prices last updated on March 23, 2026.

This SmartFares deal was found by Cheapflights users on 3/19. 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 SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/181:31 pm
SEA
-
GEG
Nonstop1h 08m
Alaska Airlines
Sun 4/195:00 am
GEG
-
SEA
Nonstop1h 16m
Alaska Airlines
Deal found 3/19$105
This Kiwi.com deal was found by Cheapflights users on 3/19. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/182:59 pm
SEA
-
GEG
Nonstop1h 04m
Hawaiian Airlines
Sun 4/195:00 am
GEG
-
SEA
Nonstop1h 16m
Hawaiian Airlines
Deal found 3/19$110
This Alaska Airlines deal was found by Cheapflights users on 3/19. 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.
Thu 4/239:24 pm
SEA
-
BOI
Nonstop1h 35m
Alaska Airlines
Sat 4/256:00 am
BOI
-
SEA
Nonstop1h 40m
Alaska Airlines
Deal found 3/19$119
This Delta deal was found by Cheapflights users on 3/18. 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.
Fri 5/810:55 am
SEA
-
GEG
Nonstop1h 18m
Delta
Sun 5/101:11 pm
GEG
-
SEA
Nonstop1h 21m
Delta
Deal found 3/18$119
This Alaska Airlines deal was found by Cheapflights users on 3/18. 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 4/189:29 pm
SEA
-
BOI
Nonstop1h 27m
Alaska Airlines
Wed 4/227:20 pm
BOI
-
SEA
Nonstop1h 33m
Alaska Airlines
Deal found 3/18$139
This Expedia deal was found by Cheapflights users on 3/18. 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.
Wed 4/228:15 pm
SEA
-
GEG
Nonstop1h 16m
Alaska Airlines
Sat 4/256:00 am
GEG
-
SEA
Nonstop1h 17m
Alaska Airlines
Deal found 3/18$139
This Delta deal was found by Cheapflights users on 3/18. 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 4/1510:36 am
SEA
-
BOI
Nonstop1h 36m
Delta
Sun 4/195:40 am
BOI
-
SEA
Nonstop1h 48m
Delta
Deal found 3/18$148
This Southwest deal was found by Cheapflights users on 3/19. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/237:20 am
SEA
-
BOI
1 stop5h 05m
Southwest
Thu 4/235:40 pm
BOI
-
SEA
1 stop8h 00m
Southwest
Deal found 3/19$151
This Southwest deal was found by Cheapflights users on 3/18. 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.
Wed 4/1511:35 am
SEA
-
BOI
2 stops10h 55m
Southwest
Wed 4/224:05 pm
BOI
-
SEA
1 stop8h 30m
Southwest
Deal found 3/18$156
This Delta deal was found by Cheapflights users on 3/19. 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.
Fri 4/175:42 pm
SEA
-
GEG
Nonstop1h 15m
Delta
Sun 4/197:15 am
GEG
-
SEA
Nonstop1h 28m
Delta
Deal found 3/19$158
This Alaska Airlines deal was found by Cheapflights users on 3/19. 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 4/217:49 am
SEA
-
BOI
Nonstop1h 32m
Alaska Airlines
Tue 4/212:22 pm
BOI
-
SEA
Nonstop1h 38m
Alaska Airlines
Deal found 3/19$159
This Delta deal was found by Cheapflights users on 3/18. 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 4/279:55 pm
SEA
-
GEG
Nonstop1h 20m
Delta
Thu 4/309:30 am
GEG
-
SEA
Nonstop1h 27m
Delta
Deal found 3/18$159

Find flight deals from Washington to Idaho

Keep the following information in mind while searching for Washington to Idaho flight deals. Data was last updated March 23, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$105
(SmartFares)

One-way from

$76
(Southwest)

Popular in

December

Cheapest in

January

Average price

$217

Good round-trip deal

$114 or less

Good one-way deal

$118 or less
Provider with most accurate pricing for Seattle/Tacoma Intl-Boise Air Term. Gowen Fld flight deals.
Search Deals
Provider most trusted by Cheapflights users for Seattle/Tacoma Intl-Boise Air Term. Gowen Fld flights.
Search Deals
From Washington to Idaho
Search Deals
One-way flight from Washington to Idaho
Search Deals
High demand for flights, 10% potential price rise
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($4 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in March 2026
Search Deals
Price to beat on a round-trip flight from Washington to Idaho.
Search Deals
Price to beat on a one-way flight from Washington to Idaho.
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Washington to Idaho 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 March 23, 2026.
Use the filters below to find and compare flights from Washington to Idaho that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

SeattleSpokane

SEA - GEG

SEAGEG

Seattle/Tacoma Intl

Mon 5/11

5:30 pm-6:43 pm

Nonstop1h 13m

Spokane

Mon 5/18

4:15 pm-5:40 pm

Nonstop1h 25m

$119

PortlandBoise

PDX - BOI

PDXBOI

Portland

Wed 4/15

12:45 pm-11:20 pm

1 stop9h 35m

Boise Air Term. Gowen Fld

Wed 4/22

5:00 pm-10:25 pm

1 stop6h 25m

$162

SeattleBoise

SEA - BOI

SEABOI

Seattle/Tacoma Intl

Sat 4/25

8:24 pm-11:02 pm

Nonstop1h 38m

Boise Air Term. Gowen Fld

Wed 4/29

6:00 am-6:40 am

Nonstop1h 40m

$177

SeattleBoise

SEA - BOI

SEABOI

Seattle/Tacoma Intl

Thu 4/23

6:50 pm-9:24 pm

Nonstop1h 34m

Boise Air Term. Gowen Fld

Sun 4/26

10:41 am-11:28 am

Nonstop1h 47m

$177

PortlandBoise

PDX - BOI

PDXBOI

Portland

Thu 4/30

9:40 pm-11:59 pm

Nonstop1h 19m

Boise Air Term. Gowen Fld

Sun 5/3

5:50 am-6:14 am

Nonstop1h 24m

$177

PortlandBoise

PDX - BOI

PDXBOI

Portland

Thu 4/30

7:32 pm-12:17 am

1 stop3h 45m

Boise Air Term. Gowen Fld

Sun 5/3

5:40 am-9:58 am

1 stop5h 18m

$187

SpokaneBoise

GEG - BOI

GEGBOI

Spokane

Mon 4/20

5:35 pm-1:00 am

1 stop6h 25m

Boise Air Term. Gowen Fld

Mon 4/27

7:55 pm-12:30 am

1 stop5h 35m

$190

PortlandSpokane

PDX - GEG

PDXGEG

Portland

Tue 4/28

7:19 am-8:40 am

Nonstop1h 21m

Spokane

Sat 5/2

12:40 pm-1:53 pm

Nonstop1h 13m

$197

SeattleBoise

SEA - BOI

SEABOI

Seattle/Tacoma Intl

Wed 5/6

5:35 pm-12:25 am

1 stop5h 50m

Boise Air Term. Gowen Fld

Sat 5/9

4:50 pm-10:00 pm

1 stop6h 10m

$197

SeattleBoise

SEA - BOI

SEABOI

Seattle/Tacoma Intl

Sun 4/26

5:00 am-9:55 am

1 stop3h 55m

Boise Air Term. Gowen Fld

Mon 4/27

6:55 pm-10:30 pm

1 stop4h 35m

$197

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/18

Showing 1-10 of 60 resultsSorted by cheapest first
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2
3
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6

Best time to book a flight from Washington to Idaho

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

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

Currently, January is the cheapest month in which you can book a flight from State of Washington to Idaho (average of $79). Flying from State of Washington to Idaho in July is currently the most expensive (average of $169). 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 WA to ID?

Find hourly flight availability from Washington to Idaho. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated March 23, 2026.

It’s optimal to fly from State of Washington to Idaho in the morning. By choosing this option you can save up to 31% on the cost of your flight, compared to a flight in the evening.

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

Use this chart to determine the cheapest time to fly round-trip from Washington to Idaho. Price data was last updated on March 14, 2026.

Travelers seeking maximum savings on their State of Washington to Idaho flight should consider departing on Tuesday at noon when fares are most often at their lowest. Sunday evenings flights should be avoided if possible as fares are typically the most expensive at this time.

Weekly flight availability from State of Washington to Idaho

Explore weekly flight availability from Washington to Idaho. 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 March 23, 2026.

The most flights from USWA to USID are scheduled on a Friday (44 on average). You will have fewer flight options on Wednesday, which is when the least amount of flights are scheduled (26 on average).

Reviews of airlines servicing Idaho

Get insights into the airlines that provide service to Idaho. 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 Idaho. Reviews last updated March 23, 2026.
Read through reviews of airlines operating flights from Washington to Idaho, such as Alaska Airlines,Delta, andHawaiian Airlines. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
7.9
Good
12,094 reviews

Crew

8.5

Overall

7.9

Boarding

8.1

Comfort

7.8

Food

7.0

Entertainment

7.0

Reviews

1 / 20
4.0
Okay

Anonymous,Dec 2025

SEA - MSY

I really got a lesson in upgrades. I let my seat get chosen . Both times a middle seat...on purpose ...even when we were not full. That's petty I sat behind the first class . They got more than 1 drink ...and a snack . .and the staff actually talked to them...behind a see thru shawl/sheet in the aisle....... You could see over the seats just fine and you could hear the voices just fine. But the sheet let You KNOW. Your not welcome here. For a moment I regretted not spending 300 dollars per seat so I could see a smile and eat a sandwhich and enjoy my seat . The married couple drank champain and laughed and flirted with each other. It looked so happy and care free MONEY really does buy happiness ..the hateful glares and sighs from my seat mates brought me back to reality I wasn't rich and I still had 2 hours left in this middle seat.
Alaska Airlines
7.9
Good
12,094 reviews
Alaska Airlines
7.9
Good
12,094 reviews

Crew

8.5

Overall

7.9

Boarding

8.1

Comfort

7.8

Food

7.0

Entertainment

7.0

Reviews

1 / 20
4.0
Okay

Anonymous,Dec 2025

SEA - MSY

I really got a lesson in upgrades. I let my seat get chosen . Both times a middle seat...on purpose ...even when we were not full. That's petty I sat behind the first class . They got more than 1 drink ...and a snack . .and the staff actually talked to them...behind a see thru shawl/sheet in the aisle....... You could see over the seats just fine and you could hear the voices just fine. But the sheet let You KNOW. Your not welcome here. For a moment I regretted not spending 300 dollars per seat so I could see a smile and eat a sandwhich and enjoy my seat . The married couple drank champain and laughed and flirted with each other. It looked so happy and care free MONEY really does buy happiness ..the hateful glares and sighs from my seat mates brought me back to reality I wasn't rich and I still had 2 hours left in this middle seat.
Delta
7.9
Good
8,315 reviews
Alaska Airlines
7.9
Good
12,094 reviews

Crew

8.5

Overall

7.9

Boarding

8.1

Comfort

7.8

Food

7.0

Entertainment

7.0

Reviews

1 / 20
4.0
Okay

Anonymous,Dec 2025

SEA - MSY

I really got a lesson in upgrades. I let my seat get chosen . Both times a middle seat...on purpose ...even when we were not full. That's petty I sat behind the first class . They got more than 1 drink ...and a snack . .and the staff actually talked to them...behind a see thru shawl/sheet in the aisle....... You could see over the seats just fine and you could hear the voices just fine. But the sheet let You KNOW. Your not welcome here. For a moment I regretted not spending 300 dollars per seat so I could see a smile and eat a sandwhich and enjoy my seat . The married couple drank champain and laughed and flirted with each other. It looked so happy and care free MONEY really does buy happiness ..the hateful glares and sighs from my seat mates brought me back to reality I wasn't rich and I still had 2 hours left in this middle seat.
Hawaiian Airlines
7.8
Good
2,841 reviews
Alaska Airlines
7.9
Good
12,094 reviews

Crew

8.5

Overall

7.9

Boarding

8.1

Comfort

7.8

Food

7.0

Entertainment

7.0

Reviews

1 / 20
4.0
Okay

Anonymous,Dec 2025

SEA - MSY

I really got a lesson in upgrades. I let my seat get chosen . Both times a middle seat...on purpose ...even when we were not full. That's petty I sat behind the first class . They got more than 1 drink ...and a snack . .and the staff actually talked to them...behind a see thru shawl/sheet in the aisle....... You could see over the seats just fine and you could hear the voices just fine. But the sheet let You KNOW. Your not welcome here. For a moment I regretted not spending 300 dollars per seat so I could see a smile and eat a sandwhich and enjoy my seat . The married couple drank champain and laughed and flirted with each other. It looked so happy and care free MONEY really does buy happiness ..the hateful glares and sighs from my seat mates brought me back to reality I wasn't rich and I still had 2 hours left in this middle seat.

Related info for your journey

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

    The Washington to Idaho flight path was viewed by 9 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 State of Washington to Idaho?

    There are many flights that can get you from State of Washington to Idaho in 1h 13m. Fly via Delta, Southwest, or Alaska Airlines to get the fastest option. The distance from State of Washington to Idaho is about 223 mi. This flight may include one or multiple stops.

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

    The cheapest airlines for a one-way flight from State of Washington to Idaho are Hawaiian Airlines ($58), Alaska Airlines ($69), and Delta ($69).

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

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

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

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

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

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

    Currently, January is the cheapest month in which you can book a flight from State of Washington to Idaho (average of $79). Flying from State of Washington to Idaho in July is currently the most expensive (average of $169). 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 Washington to Idaho

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

Discover the top 3 airlines that operate flights from Washington to Idaho. 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 March 23, 2026.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$79Average$404FlexibilityNo cancel feeOn-timeN/A
Alaska AirlinesCheapest$111Average$290FlexibilityNo cancel feeOn-time75%
Hawaiian AirlinesCheapest$127Average$250FlexibilityNo cancel feeOn-time85%

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