HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Idaho

$57+ 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 2/24. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — BOI
Feb 4 — Feb 111
Tue 2/4
Tue 2/11
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Washington to Idaho with Cheapflights

1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”
2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.
3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheap flight deals from Washington to Idaho

Discover tips and strategies to find the most affordable flight options for your journey from Washington (USWA) to Idaho (USID). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated January 30, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$137
(Alaska Airlines)

One-way from

$57
(Alaska Airlines)

Popular in

December

Cheapest in

September

Average price

$207

Good round-trip deal

$164 or less

Good one-way deal

$78 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
Highest demand for flights based on searches. 7% potential increase in price ($18 potential increase over avg. RT price).
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 January 2025
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

Find 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 January 30, 2025.

This Alaska Airlines deal was found by Cheapflights users on 1/28. 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 2/256:20 amGEG - BOI
Nonstop1h 10mAlaska Airlines
Tue 3/410:14 pmBOI - GEG
Nonstop1h 05mAlaska Airlines
Deal found 1/28$137
This Alaska Airlines deal was found by Cheapflights users on 1/28. 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 3/181:59 pmSEA - BOI
Nonstop1h 17mAlaska Airlines
Tue 3/186:43 pmBOI - SEA
1 stop3h 01mAlaska Airlines
Deal found 1/28$141
This Orbitz deal was found by Cheapflights users on 1/28. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 2/255:15 amSEA - BOI
1 stop12h 31mMultiple Airlines
Mon 3/38:59 pmBOI - SEA
Nonstop1h 39mMultiple Airlines
Deal found 1/28$142
This Cheapflightsfares deal was found by Cheapflights users on 1/28. 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.
Tue 2/255:15 amSEA - BOI
1 stop12h 31mSpirit Airlines
Mon 3/37:41 pmBOI - SEA
1 stop5h 44mSpirit Airlines
Deal found 1/28$143
This Southwest deal was found by Cheapflights users on 1/28. 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 3/188:05 amSEA - BOI
1 stop6h 45mSouthwest
Tue 3/186:10 pmBOI - SEA
1 stop5h 45mSouthwest
Deal found 1/28$151
This Alaska Airlines deal was found by Cheapflights users on 1/30. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 2/259:59 pmPDX - GEG
Nonstop1h 08mAlaska Airlines
Wed 2/269:24 pmGEG - PDX
Nonstop1h 35mAlaska Airlines
Deal found 1/30$157
This Delta deal was found by Cheapflights users on 1/28. 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 2/255:00 amGEG - BOI
1 stop3h 54mDelta
Tue 3/42:55 pmBOI - GEG
1 stop4h 49mDelta
Deal found 1/28$157
This Delta deal was found by Cheapflights users on 1/29. 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.
Wed 3/127:22 amSEA - GEG
Nonstop1h 22mDelta
Wed 3/261:55 pmGEG - SEA
Nonstop1h 18mDelta
Deal found 1/29$157
This Alaska Airlines deal was found by Cheapflights users on 1/29. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/267:55 pmSEA - IDA
Nonstop1h 41mAlaska Airlines
Wed 3/54:07 pmIDA - SEA
Nonstop1h 53mAlaska Airlines
Deal found 1/29$157
This Delta deal was found by Cheapflights users on 1/30. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/206:29 pmSEA - BOI
Nonstop1h 29mDelta
Wed 5/2811:00 amBOI - SEA
Nonstop1h 46mDelta
Deal found 1/30$167
This Southwest deal was found by Cheapflights users on 1/29. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/196:00 amGEG - BOI
1 stop8h 00mSouthwest
Sat 2/227:00 amBOI - GEG
1 stop5h 10mSouthwest
Deal found 1/29$172
This FlightHub deal was found by Cheapflights users on 1/29. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 2/1810:16 amPDX - BOI
1 stop7h 30mSpirit Airlines
Fri 2/217:41 pmBOI - PDX
1 stop14h 40mSpirit Airlines
Deal found 1/29$172

Find flights from Washington to Idaho within your budget

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 January 30, 2025.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

SeattleBoise

SEA - BOI

SEABOI

Seattle/Tacoma Intl

Wed 5/14

11:20 am-1:47 pm

Nonstop1h 27m

Boise Air Term. Gowen Fld

Tue 5/20

6:37 am-7:15 am

Nonstop1h 38m

$147

SeattleBoise

SEA - BOI

SEABOI

Seattle/Tacoma Intl

Sat 4/5

5:57 pm-8:19 pm

Nonstop1h 22m

Boise Air Term. Gowen Fld

Wed 4/9

2:30 pm-7:59 pm

1 stop6h 29m

$155

SeattleBoise

SEA - BOI

SEABOI

Seattle/Tacoma Intl

Fri 2/21

5:15 am-6:46 pm

1 stop12h 31m

Boise Air Term. Gowen Fld

Fri 2/28

7:41 pm-12:25 am

1 stop5h 44m

$156

SeattleBoise

SEA - BOI

SEABOI

Seattle/Tacoma Intl

Wed 4/9

10:55 am-1:25 pm

Nonstop1h 30m

Boise Air Term. Gowen Fld

Mon 4/14

5:40 am-6:23 am

Nonstop1h 43m

$157

PortlandSpokane

PDX - GEG

PDXGEG

Portland

Tue 2/25

9:59 pm-11:07 pm

Nonstop1h 08m

Spokane

Wed 2/26

9:24 pm-10:59 pm

Nonstop1h 35m

$157

SeattleSpokane

SEA - GEG

SEAGEG

Seattle/Tacoma Intl

Wed 3/12

10:55 pm-12:05 am

Nonstop1h 10m

Spokane

Wed 3/26

6:15 am-7:40 am

Nonstop1h 25m

$157

SeattleIdaho Falls

SEA - IDA

SEAIDA

Seattle/Tacoma Intl

Wed 2/26

7:55 pm-10:36 pm

Nonstop1h 41m

Idaho Falls Fanning Field

Wed 3/5

8:00 am-9:05 am

Nonstop2h 05m

$157

SeattleBoise

SEA - BOI

SEABOI

Seattle/Tacoma Intl

Wed 3/26

7:00 am-11:55 am

1 stop3h 55m

Boise Air Term. Gowen Fld

Mon 3/31

2:45 pm-12:30 am

2 stops10h 45m

$162

PortlandBoise

PDX - BOI

PDXBOI

Portland

Tue 2/18

10:16 am-6:46 pm

1 stop7h 30m

Boise Air Term. Gowen Fld

Fri 2/21

7:41 pm-9:21 am

1 stop14h 40m

$172

PortlandBoise

PDX - BOI

PDXBOI

Portland

Thu 3/13

4:50 pm-12:45 am

1 stop6h 55m

Boise Air Term. Gowen Fld

Mon 3/17

7:35 pm-10:20 pm

1 stop3h 45m

$177

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/30

Showing 1-10 of 60 results
1
2
3
...
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.

Travel insights for flights from Washington to Idaho

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

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

Currently, October is the cheapest month in which you can book a flight from State of Washington to Idaho (average of $314). Flying from State of Washington to Idaho in June is currently the most expensive (average of $436). 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 January 30, 2025.

When flying from State of Washington to Idaho, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

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 January 30, 2025.

The most flights from USWA to USID are scheduled on a Thursday (54 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (36 on average).

Rainfall in Idaho by month

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

In terms of precipitation, rainfall in Idaho ranges from 0.2 - 1.6 inches per month. December is typically the wettest month, when rainfall can reach 1.6 in. August is typically the driest time to visit Idaho when rainfall is around 0.2 in.

Temperature in Idaho by month

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

If weather is an important factor for your trip to Idaho, 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 75.2 F. Travelers looking to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 30.2 F).

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 January 30, 2025.
To help decide which airline to fly from Washington to Idaho, see what other customers have to say about Southwest, Alaska Airlines and Delta. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.1
Very good
4,585 reviews

Crew

8.7

Food

7.1

Entertainment

7.7

Boarding

8.2

Comfort

8.1

Overall

8.1

Reviews

1 / 20

6.0
Good

Lauren,Dec 2024

MCI - DCA

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

Southwest
8.1
Very good
4,585 reviews
Southwest
8.1
Very good
4,585 reviews

Crew

8.7

Food

7.1

Entertainment

7.7

Boarding

8.2

Comfort

8.1

Overall

8.1

Reviews

1 / 20

6.0
Good

Lauren,Dec 2024

MCI - DCA

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

Alaska Airlines
8.0
Very good
9,688 reviews
Southwest
8.1
Very good
4,585 reviews

Crew

8.7

Food

7.1

Entertainment

7.7

Boarding

8.2

Comfort

8.1

Overall

8.1

Reviews

1 / 20

6.0
Good

Lauren,Dec 2024

MCI - DCA

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

Delta
8.0
Very good
8,454 reviews
Southwest
8.1
Very good
4,585 reviews

Crew

8.7

Food

7.1

Entertainment

7.7

Boarding

8.2

Comfort

8.1

Overall

8.1

Reviews

1 / 20

6.0
Good

Lauren,Dec 2024

MCI - DCA

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

United Airlines
7.4
Good
8,913 reviews
Southwest
8.1
Very good
4,585 reviews

Crew

8.7

Food

7.1

Entertainment

7.7

Boarding

8.2

Comfort

8.1

Overall

8.1

Reviews

1 / 20

6.0
Good

Lauren,Dec 2024

MCI - DCA

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

American Airlines
7.2
Good
10,000 reviews
Southwest
8.1
Very good
4,585 reviews

Crew

8.7

Food

7.1

Entertainment

7.7

Boarding

8.2

Comfort

8.1

Overall

8.1

Reviews

1 / 20

6.0
Good

Lauren,Dec 2024

MCI - DCA

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

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 20 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 State of Washington to Idaho one-way?

    The cheapest airlines for a one-way flight from State of Washington to Idaho are Alaska Airlines ($57), Spirit Airlines ($68), 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, October is the cheapest month in which you can book a flight from State of Washington to Idaho (average of $314). Flying from State of Washington to Idaho in June is currently the most expensive (average of $436). 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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Washington to Idaho

See prices for flight routes from nearby airports that may be better suited for you.
LaGuardia to Fort Lauderdale flights
John F Kennedy Intl to Miami flights
Newark to Fort Lauderdale flights
Newark to Miami flights
LaGuardia to Miami flights
John F Kennedy Intl to Fort Lauderdale flights
John F Kennedy Intl to Orlando flights
Newark to Orlando flights
John F Kennedy Intl to West Palm Beach flights
John F Kennedy Intl to Las Vegas flights
O'Hare Intl to Las Vegas flights
Los Angeles to John F Kennedy Intl flights
Seattle to Sky Harbor Intl flights
John F Kennedy Intl to New Orleans flights
Reagan-National to Miami flights
LaGuardia to Orlando flights
John F Kennedy Intl to Los Angeles flights
Dallas/Fort Worth to Las Vegas flights
Dulles Intl to Orlando flights
Baltimore to Fort Lauderdale flights
John F Kennedy Intl to Dallas/Fort Worth flights
O'Hare Intl to Sky Harbor Intl flights
Boston to Fort Lauderdale flights
Minneapolis to Sky Harbor Intl flights
Newark to Las Vegas flights
Newark to Dallas/Fort Worth flights
Newark to West Palm Beach flights
Newark to Los Angeles flights
Dallas/Fort Worth to John F Kennedy Intl flights
Newark to Tampa flights
San Francisco to John F Kennedy Intl flights
LaGuardia to Dallas/Fort Worth flights
Boston to Miami flights
LaGuardia to New Orleans flights
Philadelphia to Orlando flights
Dallas/Fort Worth to LaGuardia flights
John F Kennedy Intl to San Francisco flights
Los Angeles to Newark flights
Minneapolis to Las Vegas flights
Los Angeles to Dallas/Fort Worth flights
Seattle to Las Vegas flights
Dulles Intl to Miami flights
O'Hare Intl to John F Kennedy Intl flights
LaGuardia to Hobby flights
Boston to Orlando flights
John F Kennedy Intl to Atlanta flights
John F Kennedy Intl to O'Hare Intl flights
San Francisco to Las Vegas flights
Newark to New Orleans flights
Detroit to Orlando flights

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 January 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$98Average$413FlexibilityNo cancel feeOn-timeN/A
Spirit AirlinesCheapest$119Average$160FlexibilityNo cancel feeOn-time65%
Alaska AirlinesCheapest$145Average$399FlexibilityNo cancel feeOn-time75%
100% Free
Cheapflights is completely free to use, so you can start saving the moment you arrive.
Book with Flexibility
Our users can plan ahead with confidence and find flights with no change fees
Travel Smart
Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.