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

If you’re flying from a popular airport in Idaho, such as Lewiston or Boise, and flying into State of Washington, then you can expect flight times to average 1h 28m and 1h 33m, respectively.

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

757 flights are operational weekly from Idaho to State of Washington as of June 2026. The most popular departure day for this route is Fri, with 18% of flights per week taking off on this day.

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

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

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

The number of flights available between Idaho and State of Washington is 108 per day as of June 2026. The most frequent departure time is 10:00AM, with 53% of daily flights leaving at noon.

What airlines fly to State of Washington?

Alaska Airlines, Delta and Hawaiian Airlines are the top three most popular airlines that fly to State of Washington from Idaho according to our data. Alaska Airlines is the first choice among our users, with 70% of people opting to fly with this airline when traveling to State of Washington. Keep in mind that there are 3 different airlines that fly to State of Washington on a routine basis, so you have a few additional options to choose from.

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

Prices for flights from Idaho to Washington are updated daily.

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

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

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

The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Idaho to Washington.

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

The required travel and health documents for your Washington 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 Washington. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

$43 Cheap Flights from Idaho to Washington in 2026

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Idaho to Washington

Round-trip

One-way

Last minute

Direct

Cheap round-trip flights

Enter your travel dates to find the best prices.

3:50 pm - 4:26 pm

IDA

PDX

1h 36mnonstop

12:20 pm - 3:00 pm

PDX

IDA

1h 40mnonstop

$71Allegiant Air

Mon, Jul 20 - Fri, Jul 31

3:50 pm - 4:26 pm

IDA

PDX

1h 36mnonstop

12:20 pm - 3:00 pm

PDX

IDA

1h 40mnonstop

$73Allegiant Air

Mon, Jul 20 - Mon, Jul 27

4:09 pm - 4:35 pm

BOI

PDX

1h 26mnonstop

5:42 pm - 8:03 pm

PDX

BOI

1h 21mnonstop

$177Alaska Airlines

Tue, Nov 10 - Wed, Nov 18

7:05 pm - 10:45 pm

BOI

PDX

4h 40m

1 stop

9:00 am - 3:31 pm

PDX

BOI

5h 31m

1 stop

$187United Airlines

Sat, Aug 22 - Wed, Aug 26

9:00 am - 9:30 am

BOI

PDX

1h 30mnonstop

5:42 pm - 8:03 pm

PDX

BOI

1h 21mnonstop

$191Alaska Airlines

Sat, Nov 14 - Tue, Nov 17

7:05 am - 8:30 am

GEG

SEA

1h 25mnonstop

5:55 pm - 7:15 pm

SEA

GEG

1h 20mnonstop

$197Delta

Wed, Sep 16 - Sat, Sep 19

6:05 pm - 1:10 am

BOI

PDX

8h 05m

1 stop

4:40 pm - 11:55 pm

PDX

BOI

6h 15m

1 stop

$197Southwest

Fri, Oct 16 - Tue, Oct 20

5:10 am - 6:27 am

GEG

SEA

1h 17mnonstop

1:57 pm - 3:18 pm

SEA

GEG

1h 21mnonstop

$207Delta

Wed, Sep 16 - Thu, Oct 1

6:15 am - 10:11 am

BOI

PDX

4h 56m

1 stop

7:00 am - 3:31 pm

PDX

BOI

7h 31m

1 stop

$214United Airlines

Wed, Sep 2 - Sun, Sep 6

4:55 pm - 12:40 am

BOI

SEA

8h 45m

1 stop

5:30 am - 12:15 pm

SEA

BOI

5h 45m

1 stop

$252Southwest

Thu, Aug 13 - Sat, Aug 22

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Delta flights from Idaho to State of Washington

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

Delta

Sep 16

GEG7:05 amSpokane

1h 25m

SEA8:30 amSeattle/Tacoma Intl

Sep 19

SEA5:55 pmSeattle/Tacoma Intl

1h 20m

GEG7:15 pmSpokane

$197

Delta

Sep 16

GEG5:10 amSpokane

1h 17m

SEA6:27 amSeattle/Tacoma Intl

Oct 1

SEA1:57 pmSeattle/Tacoma Intl

1h 21m

GEG3:18 pmSpokane

$207

Delta

Oct 23

GEG7:55 amSpokane

1h 31m

SEA9:26 amSeattle/Tacoma Intl

Oct 26

SEA10:35 pmSeattle/Tacoma Intl

1h 07m

GEG11:42 pmSpokane

$217

Frontier flights from Idaho to State of Washington

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

Frontier

Jul 9

BOI1:24 pmBoise Air Term. Gowen Fld

20h 53m

1 stop

SEA9:17 amSeattle/Tacoma Intl

Jul 13

SEA7:06 pmSeattle/Tacoma Intl

16h 23m

1 stop

BOI12:29 pmBoise Air Term. Gowen Fld

$279

Frontier

Jul 9

BOI1:24 pmBoise Air Term. Gowen Fld

20h 53m

1 stop

SEA9:17 amSeattle/Tacoma Intl

Jul 13

SEA7:06 pmSeattle/Tacoma Intl

16h 23m

1 stop

BOI12:29 pmBoise Air Term. Gowen Fld

$329

Frontier

Jul 9

BOI1:24 pmBoise Air Term. Gowen Fld

28h 27m

1 stop

PDX4:51 pmPortland

Jul 13

PDX12:20 pmPortland

23h 09m

1 stop

BOI12:29 pmBoise Air Term. Gowen Fld

$346

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

Idaho FallsPortland

IDA - PDX

IDAPDX

Idaho Falls Fanning Field

Mon 7/20

3:50 pm-4:26 pm

Nonstop1h 36m

Portland

Fri 7/31

12:20 pm-3:00 pm

Nonstop1h 40m

$71

Idaho FallsPortland

IDA - PDX

IDAPDX

Idaho Falls Fanning Field

Mon 7/20

3:50 pm-4:26 pm

Nonstop1h 36m

Portland

Mon 7/27

12:20 pm-3:00 pm

Nonstop1h 40m

$73

BoisePortland

BOI - PDX

BOIPDX

Boise Air Term. Gowen Fld

Tue 11/10

4:09 pm-4:35 pm

Nonstop1h 26m

Portland

Wed 11/18

5:42 pm-8:03 pm

Nonstop1h 21m

$177

BoisePortland

BOI - PDX

BOIPDX

Boise Air Term. Gowen Fld

Sat 8/22

7:05 pm-10:45 pm

1 stop4h 40m

Portland

Wed 8/26

9:00 am-3:31 pm

1 stop5h 31m

$187

BoisePortland

BOI - PDX

BOIPDX

Boise Air Term. Gowen Fld

Sat 11/14

9:00 am-9:30 am

Nonstop1h 30m

Portland

Tue 11/17

5:42 pm-8:03 pm

Nonstop1h 21m

$191

SpokaneSeattle

GEG - SEA

GEGSEA

Spokane

Wed 9/16

7:05 am-8:30 am

Nonstop1h 25m

Seattle/Tacoma Intl

Sat 9/19

5:55 pm-7:15 pm

Nonstop1h 20m

$197

BoisePortland

BOI - PDX

BOIPDX

Boise Air Term. Gowen Fld

Fri 10/16

6:05 pm-1:10 am

1 stop8h 05m

Portland

Tue 10/20

4:40 pm-11:55 pm

1 stop6h 15m

$197

Quickest round-trip

SpokaneSeattle

GEG - SEA

GEGSEA

Spokane

Wed 9/16

5:10 am-6:27 am

Nonstop1h 17m

Seattle/Tacoma Intl

Thu 10/1

1:57 pm-3:18 pm

Nonstop1h 21m

$207

BoisePortland

BOI - PDX

BOIPDX

Boise Air Term. Gowen Fld

Wed 9/2

6:15 am-10:11 am

1 stop4h 56m

Portland

Sun 9/6

7:00 am-3:31 pm

1 stop7h 31m

$214

BoiseSeattle

BOI - SEA

BOISEA

Boise Air Term. Gowen Fld

Thu 8/13

4:55 pm-12:40 am

1 stop8h 45m

Seattle/Tacoma Intl

Sat 8/22

5:30 am-12:15 pm

1 stop5h 45m

$252

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 Idaho to State of Washington

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 State of Washington?

The month of August is, on average, the cheapest month to fly to State of Washington from Idaho, with most prices found around $59. If you aren’t able to travel to State of Washington during the month of August, then flying in March is also cheap. Prices for this month can be found on momondo for an average of $59.

What is the cheapest day to depart on your flight to State of Washington?

The cheapest day to depart from Idaho to State of Washington is on a Friday. Travelers who choose to depart for State of Washington on a Friday will often find tickets for as low as $370. When flying out on a Sunday, the most expensive travel day of the week, you can expect to see flight prices from Idaho to State of Washington for around $561.

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

The cheapest time of day to fly to State of Washington is in the afternoon when flights can be purchased for as low as $452. If you have a flexible travel schedule, then try to avoid flying in the evening when prices are $507 on average. Flights to State of Washington from Idaho in the evening are generally more expensive because this time of day is more convenient for travelers’ schedules.

What is the cheapest Idaho to Washington flight route?

Fly from Boise Air Term. Gowen Fld to Pullman Moscow Regional for the best Idaho - Washington flight prices

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

You are more likely to see cheaper flights to State of Washington from Idaho when booking weeks ahead of your departure date. In general, you can expect to find flights to State of Washington for around $206 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to State of Washington from Idaho for as low as $157 on momondo.

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

There are 4 cabin classes available to choose from on Idaho to State of Washington 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 Idaho to State of Washington flights?

You could potentially save up to 23% on your flight if you consider stops on a Idaho to State of Washington flight.

Cheap Idaho to State of Washington flight deals and tips

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

Best Price Found	$143
Fastest flight time	1h 08m
Direct flights	Every day
Airports in State of Washington	96 airports

The best one-way flight to State of Washington from Idaho in the past 72 hours is $143. The best round-trip flight deal from Idaho to State of Washington found on momondo in the last 72 hours is $227.

The fastest flight from Idaho to State of Washington takes 1h 08m

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

There are 96 airports in State of Washington. From Idaho there are direct flights to Portland (PDX), Spokane (GEG), Seattle/Tacoma Intl (SEA).

Search flight deals

Frequently asked questions about flying from Idaho to Washington

When did momondo last update prices for flights from Idaho to Washington?
Prices for flights from Idaho to Washington are updated daily.
How many operators does momondo search for flights from Idaho to Washington?
The number of operators available for flights from Idaho to Washington is 5 as of June 2026.
How old do you have to be to fly from Idaho to Washington?
The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Idaho to Washington.
What documentation or ID do you need to fly to Washington?
The required travel and health documents for your Washington 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 Washington. 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 Idaho to State of Washington?
momondo data reveals that the most frequently booked plane model on the route from Idaho to State of Washington is Boeing 737-800 Passenger/BBJ2 (winglets), representing 37.97% of all bookings. The subsequent popular models are Embraer 175 at 13.30%, Embraer 175 (Enhanced Winglets) at 10.76%, and Boeing 737-700 at 10.16%.

Best airlines flying from Idaho to State of Washington

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

Airline	Rating	Free Cancellation	Price
Hawaiian Airlines	PriceFrom $97	Free Cancellation	Rating 7.8 2,826 reviews	Search Hawaiian Airlines flights
Delta	PriceFrom $97	Free Cancellation	Rating 7.8 8,455 reviews	Search Delta flights
Alaska Airlines	PriceFrom $99	Free Cancellation	Rating 7.9 12,590 reviews	Search Alaska Airlines flights

Why use momondo?

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

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from Idaho to Washington for you.

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

Yes. momondo allows you to filter the results for Idaho to Washington flights to just show those with flexible booking policies.

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

Once you have performed a search for Idaho to Washington flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

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

If you are simply researching potential flights to Washington, momondo offers a useful price alert feature which will track prices for flights to Washington from Idaho and alert you when they change.

An easier way to manage your State of Washington trip

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Popular cities in Washington

Flights to New Yorkfrom $77

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Flights to San Franciscofrom $55

Flights to Las Vegasfrom $56

Flights to Washington, D.C.from $55

Flights to Bostonfrom $61

Flights to Atlantafrom $56

Flights to Fort Lauderdalefrom $58

Flights to Dallasfrom $105

Cheap flights from Idaho to Washington from $43

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Idaho to Washington departing on 7/10. 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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Delta flights from Idaho to State of Washington

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

Frontier flights from Idaho to State of Washington

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

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

What is the cheapest month to fly to State of Washington?

What is the cheapest day to depart on your flight to State of Washington?

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

What is the cheapest Idaho to Washington flight route?

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

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

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

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

What airlines fly to State of Washington?

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

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

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

Cheap Idaho to State of Washington flight deals and tips

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

Best Price Found

Fastest flight time

Direct flights

Airports in State of Washington

Frequently asked questions about flying from Idaho to Washington

Best airlines flying from Idaho to State of Washington

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

Why use momondo?

An easier way to manage your State of Washington 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 Washington

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According to popular flight searches on momondo this year

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