What is the cheapest airline that flies from Washington to Idaho?

Southwest, United Airlines, and Frontier are the most popular carriers operating from Washington to Idaho

What airlines fly to Idaho?

Alaska Airlines, Delta and Hawaiian Airlines are the top three most popular airlines that fly to Idaho from State of Washington according to our data. Alaska Airlines is the first choice among our users, with 66% of people opting to fly with this airline when traveling to Idaho. Keep in mind that there are 3 different airlines that fly to Idaho on a routine basis, so you have a few additional options to choose from.

How long is the flight from State of Washington to Idaho?

Flight times from State of Washington to Idaho vary, but if you’re flying out of Spokane and flying into Boise (one of the most popular routes), then the duration is 1h 07m on average. Another popular route from State of Washington to Idaho is flying from Seattle to Boise, which will take roughly 1h 31m. Keep in mind that layovers or delays could extend your travel time.

How many flights depart from State of Washington to Idaho on average per day?

57 flights are operational daily from State of Washington to Idaho as of May 2026. The most popular departure time for this route is 5:00PM, with 47% of flights per day taking off in the evening.

How many flights depart from State of Washington to Idaho on average per week?

As of May 2026, 401 flights take off from State of Washington and land in Idaho each week. The most common flight departure day for this route is Wed, with 22% of weekly flights taking off on this day.

When did momondo last update prices for flights from Washington to Idaho?

Prices for flights from Washington to Idaho are refreshed on a daily basis.

How many operators does momondo search for flights from Washington to Idaho?

The number of operators available for flights from Washington to Idaho is 5 as of May 2026.

How old do you have to be to fly from Washington to Idaho?

The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Washington to Idaho.

What documentation or ID do you need to fly to Idaho?

The required travel and health documents for your Idaho trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Idaho. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

$79 Cheap Flights from Washington to Idaho in 2026

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Round-trip

One-way

Last minute

Direct

Cheap round-trip flights

Enter your travel dates to find the best prices.

1:04 pm - 3:34 pm

SEA

BOI

1h 30mnonstop

8:51 pm - 9:29 pm

BOI

SEA

1h 38mnonstop

$134Alaska Airlines

Thu, May 28 - Mon, Jun 1

11:59 am - 2:41 pm

SEA

BOI

1h 42mnonstop

7:53 pm - 8:50 pm

BOI

SEA

1h 57mnonstop

$137Delta

Thu, Jun 4 - Sun, Jun 7

5:35 pm - 12:25 am

SEA

BOI

5h 50m

1 stop

7:55 pm - 11:30 pm

BOI

SEA

4h 35m

1 stop

$157Southwest

Tue, Jun 2 - Wed, Jun 10

2:20 pm - 11:30 pm

SEA

BOI

8h 10m

1 stop

4:05 pm - 11:10 pm

BOI

SEA

8h 05m

2 stops

$162Southwest

Tue, Jun 2 - Tue, Jun 9

7:35 am - 4:40 pm

SEA

BOI

8h 05m

2 stops

5:10 pm - 12:35 am

BOI

SEA

8h 25m

2 stops

$167Southwest

Tue, Jun 2 - Sat, Jun 6

5:59 pm - 8:32 pm

SEA

BOI

1h 33mnonstop

6:00 pm - 6:40 pm

BOI

SEA

1h 40mnonstop

$177Delta

Wed, Jun 3 - Sat, Jun 6

9:29 pm - 11:58 pm

SEA

BOI

1h 29mnonstop

8:51 pm - 9:29 pm

BOI

SEA

1h 38mnonstop

$183Alaska Airlines

Thu, May 28 - Tue, Jun 2

11:16 am - 4:44 pm

PDX

BOI

4h 28m

1 stop

7:05 pm - 10:49 pm

BOI

PDX

4h 44m

1 stop

$187United Airlines

Tue, Jun 2 - Tue, Jun 9

11:16 am - 4:44 pm

PDX

BOI

4h 28m

1 stop

7:05 pm - 12:50 am

BOI

PDX

6h 45m

1 stop

$205United Airlines

Tue, May 26 - Wed, May 27

12:33 pm - 12:30 pm

GEG

BOI

22h 57m

1 stop

1:25 pm - 11:38 am

BOI

GEG

23h 13m

1 stop

$216Frontier

Mon, May 25 - Tue, Jun 2

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Alaska Airlines flights from State of Washington to Idaho

Our best Alaska Airlines deals on State of Washington to Idaho flight tickets

Alaska Airlines

May 28

SEA1:04 pmSeattle/Tacoma Intl

1h 30m

BOI3:34 pmBoise Air Term. Gowen Fld

Jun 1

BOI8:51 pmBoise Air Term. Gowen Fld

1h 38m

SEA9:29 pmSeattle/Tacoma Intl

$134

Alaska Airlines

May 28

SEA9:29 pmSeattle/Tacoma Intl

1h 29m

BOI11:58 pmBoise Air Term. Gowen Fld

Jun 2

BOI8:51 pmBoise Air Term. Gowen Fld

1h 38m

SEA9:29 pmSeattle/Tacoma Intl

$183

Alaska Airlines

Jun 3

SEA9:29 pmSeattle/Tacoma Intl

1h 29m

BOI11:58 pmBoise Air Term. Gowen Fld

Jun 8

BOI4:19 pmBoise Air Term. Gowen Fld

1h 40m

SEA4:59 pmSeattle/Tacoma Intl

$187

Delta flights from State of Washington to Idaho

Our best Delta deals on State of Washington to Idaho flight tickets

Delta

Jun 4

SEA11:59 amSeattle/Tacoma Intl

1h 42m

BOI2:41 pmBoise Air Term. Gowen Fld

Jun 7

BOI7:53 pmBoise Air Term. Gowen Fld

1h 57m

SEA8:50 pmSeattle/Tacoma Intl

$137

Delta

Jun 3

SEA5:59 pmSeattle/Tacoma Intl

1h 33m

BOI8:32 pmBoise Air Term. Gowen Fld

Jun 6

BOI6:00 pmBoise Air Term. Gowen Fld

1h 40m

SEA6:40 pmSeattle/Tacoma Intl

$177

Delta

Jun 1

SEA7:15 amSeattle/Tacoma Intl

1h 37m

BOI9:52 amBoise Air Term. Gowen Fld

Jun 2

BOI3:14 pmBoise Air Term. Gowen Fld

1h 39m

SEA3:53 pmSeattle/Tacoma Intl

$197

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

SeattleBoise

SEA - BOI

SEABOI

Seattle/Tacoma Intl

Thu 5/28

1:04 pm-3:34 pm

Nonstop1h 30m

Boise Air Term. Gowen Fld

Mon 6/1

8:51 pm-9:29 pm

Nonstop1h 38m

$134

SeattleBoise

SEA - BOI

SEABOI

Seattle/Tacoma Intl

Thu 6/4

11:59 am-2:41 pm

Nonstop1h 42m

Boise Air Term. Gowen Fld

Sun 6/7

7:53 pm-8:50 pm

Nonstop1h 57m

$137

SeattleBoise

SEA - BOI

SEABOI

Seattle/Tacoma Intl

Tue 6/2

5:35 pm-12:25 am

1 stop5h 50m

Boise Air Term. Gowen Fld

Wed 6/10

7:55 pm-11:30 pm

1 stop4h 35m

$157

SeattleBoise

SEA - BOI

SEABOI

Seattle/Tacoma Intl

Tue 6/2

2:20 pm-11:30 pm

1 stop8h 10m

Boise Air Term. Gowen Fld

Tue 6/9

4:05 pm-11:10 pm

2 stops8h 05m

$162

SeattleBoise

SEA - BOI

SEABOI

Seattle/Tacoma Intl

Tue 6/2

7:35 am-4:40 pm

2 stops8h 05m

Boise Air Term. Gowen Fld

Sat 6/6

5:10 pm-12:35 am

2 stops8h 25m

$167

SeattleBoise

SEA - BOI

SEABOI

Seattle/Tacoma Intl

Wed 6/3

5:59 pm-8:32 pm

Nonstop1h 33m

Boise Air Term. Gowen Fld

Sat 6/6

6:00 pm-6:40 pm

Nonstop1h 40m

$177

Quickest round-trip

SeattleBoise

SEA - BOI

SEABOI

Seattle/Tacoma Intl

Thu 5/28

9:29 pm-11:58 pm

Nonstop1h 29m

Boise Air Term. Gowen Fld

Tue 6/2

8:51 pm-9:29 pm

Nonstop1h 38m

$183

PortlandBoise

PDX - BOI

PDXBOI

Portland

Tue 6/2

11:16 am-4:44 pm

1 stop4h 28m

Boise Air Term. Gowen Fld

Tue 6/9

7:05 pm-10:49 pm

1 stop4h 44m

$187

PortlandBoise

PDX - BOI

PDXBOI

Portland

Tue 5/26

11:16 am-4:44 pm

1 stop4h 28m

Boise Air Term. Gowen Fld

Wed 5/27

7:05 pm-12:50 am

1 stop6h 45m

$205

SpokaneBoise

GEG - BOI

GEGBOI

Spokane

Mon 5/25

12:33 pm-12:30 pm

1 stop22h 57m

Boise Air Term. Gowen Fld

Tue 6/2

1:25 pm-11:38 am

1 stop23h 13m

$216

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How to get the cheapest flight ticket from State of Washington to Idaho

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

Prices

Airlines

Other information

What is the cheapest month to fly to Idaho?

In general, October is the cheapest month to fly from State of Washington to Idaho. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $59. If you don’t want to visit Idaho in October, then you should wait until September to fly from State of Washington, when ticket prices are also cheap, with an average price of $59.

What is the cheapest day to depart on your flight to Idaho?

Our data shows that Saturday is the least expensive day to fly to Idaho. Tickets to fly out on this day can be as low as $197. On the other hand, Sunday is the most expensive day to depart from State of Washington because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $317.

What is the cheapest time of day to depart on your flight to Idaho?

According to our data, the cheapest time of day to fly to Idaho is at noon. momondo users have found flights departing from State of Washington to Idaho at noon for as low as $208. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. In the evening is when there is more demand to fly to Idaho, so prices are often more expensive at around $222 per ticket.

What is the cheapest Washington to Idaho flight route?

Fly from Seattle/Tacoma Intl to Boise Air Term. Gowen Fld for the best Washington - Idaho flight prices

How far in advance should I book a flight from Washington to Idaho?

You are more likely to see cheaper flights to Idaho from State of Washington when booking weeks ahead of your departure date. In general, you can expect to find flights to Idaho for around $201 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Idaho from State of Washington for as low as $164 on momondo.

Can stopping save me money on State of Washington to Idaho flights?

You could potentially save up to 41% on your flight if you consider stops on a State of Washington to Idaho flight.

Cheap State of Washington to Idaho flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from State of Washington to Idaho

Best Price Found	$118
Fastest flight time	0h 59m
Direct flights	Every day
Airports in Idaho	27 airports

The best one-way flight to Idaho from State of Washington in the past 72 hours is $118. The best round-trip flight deal from State of Washington to Idaho found on momondo in the last 72 hours is $217.

The fastest flight from State of Washington to Idaho takes 0h 59m

Direct flights go from State of Washington to Idaho every day.

There are 27 airports in Idaho. From State of Washington there are direct flights to Spokane (GEG), Boise Air Term. Gowen Fld (BOI).

Search flight deals

Frequently asked questions about flying from Washington to Idaho

When did momondo last update prices for flights from Washington to Idaho?
Prices for flights from Washington to Idaho are refreshed on a daily basis.
How many operators does momondo search for flights from Washington to Idaho?
The number of operators available for flights from Washington to Idaho is 5 as of May 2026.
How old do you have to be to fly from Washington to Idaho?
The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Washington to Idaho.
What documentation or ID do you need to fly to Idaho?
The required travel and health documents for your Idaho trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Idaho. We recommend that you seek guidance from your airline or a reliable third party such as IATA.
What is the most popular plane model from State of Washington to Idaho?
Based on momondo bookings for flights between State of Washington and Idaho, the leading plane model is Boeing 737-800 Passenger/BBJ2 (winglets), making up 29.80% of the total bookings. Other popular models include Embraer 175 with 25.25%, Boeing 737-900 Passenger/BBJ3 (winglets) with 7.74%, and Embraer 175 (Enhanced Winglets) with 6.23%.

Best airlines flying from State of Washington to Idaho

Compare and see reviews for airlines that fly from State of Washington to Idaho with momondo

Airline	Rating	Free Cancellation	Price
Delta	PriceFrom $79	Free Cancellation	Rating 7.9 8,461 reviews	Search Delta flights
Alaska Airlines	PriceFrom $107	Free Cancellation	Rating 7.9 12,331 reviews	Search Alaska Airlines flights
Hawaiian Airlines	PriceFrom $108	Free Cancellation	Rating 7.8 2,837 reviews	Search Hawaiian Airlines flights

Why use momondo?

Why should I use momondo to find a flight deal from Washington to Idaho?

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from Washington to Idaho. Millions of users trust and use momondo every year so you are in good hands.

Can I find flights from Washington to Idaho with flexible booking policies on momondo?

All flight searches from Washington to Idaho on momondo can be filtered to show those which offer flexible booking policies.

How can momondo help me find flights from Washington to Idaho?

momondo provides multiple filters to help you find the best flight to Idaho from Washington. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

I’m not ready to book a flight from Washington to Idaho right now. Can momondo alert me if prices change?

Yes. momondo can track prices for Washington to Idaho flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.

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Flights to Las Vegasfrom $56

Flights to Washington, D.C.from $55

Flights to Bostonfrom $66

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Flights to Dallasfrom $77

Flights to Fort Lauderdalefrom $56

Cheap flights from Washington to Idaho from $79

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Washington to Idaho departing on 5/31. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

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Alaska Airlines flights from State of Washington to Idaho

Our best Alaska Airlines deals on State of Washington to Idaho flight tickets

Delta flights from State of Washington to Idaho

Our best Delta deals on State of Washington to Idaho flight tickets

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How to get the cheapest flight ticket from State of Washington to Idaho

What is the cheapest month to fly to Idaho?

What is the cheapest day to depart on your flight to Idaho?

What is the cheapest time of day to depart on your flight to Idaho?

What is the cheapest Washington to Idaho flight route?

How far in advance should I book a flight from Washington to Idaho?

Can stopping save me money on State of Washington to Idaho flights?

What is the cheapest airline that flies from Washington to Idaho?

What airlines fly to Idaho?

How many flights depart from State of Washington to Idaho on average per day?

How many flights depart from State of Washington to Idaho on average per week?

How long is the flight from State of Washington to Idaho?

Cheap State of Washington to Idaho flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from State of Washington to Idaho

Best Price Found

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Direct flights

Airports in Idaho

Frequently asked questions about flying from Washington to Idaho

Best airlines flying from State of Washington to Idaho

Compare and see reviews for airlines that fly from State of Washington to Idaho with momondo

Why use momondo?

An easier way to manage your Idaho trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

Find better results for your trip to Idaho

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