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 63% 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 many flights depart from State of Washington to Idaho on average per day?

120 flights are operational daily from State of Washington to Idaho as of February 2026. The most popular departure time for this route is 3:00PM, with 40% of flights per day taking off in the afternoon.

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 08m on average. Another popular route from State of Washington to Idaho is flying from Seattle to Boise, which will take roughly 1h 20m. Keep in mind that layovers or delays could extend your travel time.

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

Alaska Airlines, Southwest, and Delta are the most popular carriers operating from Washington to Idaho

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

As of February 2026, 843 flights take off from State of Washington and land in Idaho each week. The most common flight departure day for this route is Mon, with 18% 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 February 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.

$74 Cheap Flights from Washington to Idaho in 2026

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Round-trip

One-way

Last minute

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Cheap round-trip flights

Enter your travel dates to find the best prices.

1:50 pm - 4:15 pm

SEA

BOI

1h 25mnonstop

10:35 am - 11:18 am

BOI

SEA

1h 43mnonstop

$137Delta

Tue, Mar 3 - Tue, Mar 10

8:15 pm - 9:24 pm

SEA

GEG

1h 09mnonstop

5:00 am - 6:16 am

GEG

SEA

1h 16mnonstop

$146Hawaiian Airlines

Wed, Mar 18 - Wed, Mar 25

7:15 am - 9:55 am

SEA

BOI

1h 40mnonstop

10:35 am - 11:20 am

BOI

SEA

1h 45mnonstop

$147Delta

Wed, Mar 25 - Sun, Mar 29

3:09 pm - 5:49 pm

PDX

IDA

1h 40mnonstop

6:39 pm - 7:18 pm

IDA

PDX

1h 39mnonstop

$149Allegiant Air

Fri, Jun 26 - Mon, Jun 29

10:53 pm - 11:59 pm

SEA

GEG

1h 06mnonstop

6:20 am - 12:40 pm

GEG

SEA

6h 20m

1 stop

$151Hawaiian Airlines

Wed, Mar 18 - Wed, Mar 25

5:36 pm - 6:46 pm

PDX

GEG

1h 10mnonstop

5:00 am - 6:28 am

GEG

PDX

1h 28mnonstop

$157Alaska Airlines

Tue, Mar 3 - Tue, Mar 10

1:42 pm - 3:50 pm

GEG

BOI

1h 08mnonstop

10:50 pm - 11:03 pm

BOI

GEG

1h 13mnonstop

$157Alaska Airlines

Thu, Feb 26 - Sun, Mar 1

11:20 am - 10:15 pm

SEA

BOI

9h 55m

1 stop

5:25 pm - 9:50 pm

BOI

SEA

5h 25m

1 stop

$162Southwest

Wed, Feb 25 - Wed, Mar 4

12:20 pm - 3:00 pm

PDX

IDA

1h 40mnonstop

3:50 pm - 4:26 pm

IDA

PDX

1h 36mnonstop

$170Allegiant Air

Mon, Jul 27 - Mon, Aug 3

5:50 am - 11:20 am

SEA

BOI

4h 30m

1 stop

10:55 am - 9:55 pm

BOI

SEA

12h 00m

1 stop

$172Southwest

Sat, Feb 28 - Sun, Mar 1

United Airlines flights from State of Washington to Idaho

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

United Airlines

Feb 28

PDX1:40 pmPortland

6h 31m

1 stop

BOI9:11 pmBoise Air Term. Gowen Fld

Mar 10

BOI8:39 amBoise Air Term. Gowen Fld

4h 54m

1 stop

PDX12:33 pmPortland

$198

United Airlines

Feb 28

PDX1:40 pmPortland

6h 31m

1 stop

BOI9:11 pmBoise Air Term. Gowen Fld

Mar 7

BOI6:55 pmBoise Air Term. Gowen Fld

5h 14m

1 stop

PDX11:09 pmPortland

$210

United Airlines

Mar 6

SEA5:20 pmSeattle/Tacoma Intl

5h 37m

1 stop

BOI11:57 pmBoise Air Term. Gowen Fld

Mar 7

BOI12:59 pmBoise Air Term. Gowen Fld

6h 31m

1 stop

SEA6:30 pmSeattle/Tacoma Intl

$224

Alaska Airlines flights from State of Washington to Idaho

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

Alaska Airlines

Mar 3

SEA9:10 amSeattle/Tacoma Intl

1h 30m

BOI11:40 amBoise Air Term. Gowen Fld

Mar 10

BOI8:30 amBoise Air Term. Gowen Fld

1h 48m

SEA9:18 amSeattle/Tacoma Intl

$137

Alaska Airlines

Feb 27

PDX9:40 pmPortland

1h 19m

BOI11:59 pmBoise Air Term. Gowen Fld

Feb 28

BOI4:02 pmBoise Air Term. Gowen Fld

1h 28m

PDX4:30 pmPortland

$157

Alaska Airlines

Mar 3

SEA9:54 amSeattle/Tacoma Intl

4h 56m

1 stop

BOI3:50 pmBoise Air Term. Gowen Fld

Mar 9

BOI4:30 pmBoise Air Term. Gowen Fld

6h 12m

1 stop

SEA9:42 pmSeattle/Tacoma Intl

$167

Fly from

Fly to

Route

Depart

Return

Price

SeattleBoise

SEA - BOI

SEABOI

Seattle/Tacoma Intl

Tue 3/3

1:50 pm-4:15 pm

Nonstop1h 25m

Boise Air Term. Gowen Fld

Tue 3/10

10:35 am-11:18 am

Nonstop1h 43m

$137

SeattleSpokane

SEA - GEG

SEAGEG

Seattle/Tacoma Intl

Wed 3/18

8:15 pm-9:24 pm

Nonstop1h 09m

Spokane

Wed 3/25

5:00 am-6:16 am

Nonstop1h 16m

$146

SeattleBoise

SEA - BOI

SEABOI

Seattle/Tacoma Intl

Wed 3/25

7:15 am-9:55 am

Nonstop1h 40m

Boise Air Term. Gowen Fld

Sun 3/29

10:35 am-11:20 am

Nonstop1h 45m

$147

PortlandIdaho Falls

PDX - IDA

PDXIDA

Portland

Fri 6/26

3:09 pm-5:49 pm

Nonstop1h 40m

Idaho Falls Fanning Field

Mon 6/29

6:39 pm-7:18 pm

Nonstop1h 39m

$149

SeattleSpokane

SEA - GEG

SEAGEG

Seattle/Tacoma Intl

Wed 3/18

10:53 pm-11:59 pm

Nonstop1h 06m

Spokane

Wed 3/25

6:20 am-12:40 pm

1 stop6h 20m

$151

PortlandSpokane

PDX - GEG

PDXGEG

Portland

Tue 3/3

5:36 pm-6:46 pm

Nonstop1h 10m

Spokane

Tue 3/10

5:00 am-6:28 am

Nonstop1h 28m

$157

SpokaneBoise

GEG - BOI

GEGBOI

Spokane

Thu 2/26

1:42 pm-3:50 pm

Nonstop1h 08m

Boise Air Term. Gowen Fld

Sun 3/1

10:50 pm-11:03 pm

Nonstop1h 13m

$157

SeattleBoise

SEA - BOI

SEABOI

Seattle/Tacoma Intl

Wed 2/25

11:20 am-10:15 pm

1 stop9h 55m

Boise Air Term. Gowen Fld

Wed 3/4

5:25 pm-9:50 pm

1 stop5h 25m

$162

PortlandIdaho Falls

PDX - IDA

PDXIDA

Portland

Mon 7/27

12:20 pm-3:00 pm

Nonstop1h 40m

Idaho Falls Fanning Field

Mon 8/3

3:50 pm-4:26 pm

Nonstop1h 36m

$170

SeattleBoise

SEA - BOI

SEABOI

Seattle/Tacoma Intl

Sat 2/28

5:50 am-11:20 am

1 stop4h 30m

Boise Air Term. Gowen Fld

Sun 3/1

10:55 am-9:55 pm

1 stop12h 00m

$172

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

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, January 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 $173. If you don’t want to visit Idaho in January, then you should wait until April to fly from State of Washington, when ticket prices are also cheap, with an average price of $197.

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

Our data shows that Thursday 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 $299.

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 $197. 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 morning is when there is more demand to fly to Idaho, so prices are often more expensive at around $212 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 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 $202 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 $161 on momondo.

What cabin class options are available on Washington to Idaho flights?

There are 4 cabin classes available to choose from on Washington to Idaho flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

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

You could potentially save up to 25% 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	$98
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 $98. The best round-trip flight deal from State of Washington to Idaho found on momondo in the last 72 hours is $139.

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

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 February 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 Embraer 175, making up 27.83% of the total bookings. Other popular models include Boeing 737-800 Passenger/BBJ2 (winglets) with 25.08%, Embraer 175 (Enhanced Winglets) with 10.70%, and Boeing 737-900 Passenger/BBJ3 (winglets) with 9.33%.

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
Hawaiian Airlines	PriceFrom $88	Free Cancellation	Rating 7.8 2,831 reviews	Search Hawaiian Airlines flights
Delta	PriceFrom $97	Free Cancellation	Rating 7.9 8,138 reviews	Search Delta flights
Alaska Airlines	PriceFrom $112	Free Cancellation	Rating 8.0 11,833 reviews	Search Alaska 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 $49

Flights to Washington, D.C.from $51

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Flights to Dallasfrom $49

Flights to Seattlefrom $83

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 2/28. 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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United Airlines flights from State of Washington to Idaho

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

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Our best Alaska Airlines 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?

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 to Idaho?

What cabin class options are available on Washington to Idaho flights?

There are 4 cabin classes available to choose from on Washington to Idaho flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

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

You could potentially save up to 25% on your flight if you consider stops on a State of Washington to Idaho flight.

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

Alaska Airlines, Southwest, and Delta are the most popular carriers operating from Washington to Idaho

What airlines fly to Idaho?

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

120 flights are operational daily from State of Washington to Idaho as of February 2026. The most popular departure time for this route is 3:00PM, with 40% of flights per day taking off in the afternoon.

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

As of February 2026, 843 flights take off from State of Washington and land in Idaho each week. The most common flight departure day for this route is Mon, with 18% of weekly flights taking off on this day.

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

Fastest flight time

Direct flights

Airports in Idaho

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

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

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

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

What is the most popular plane model from State of 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?

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

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

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

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

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

Popular cities in Idaho

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