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

Southwest, Spirit Airlines, and Hawaiian Airlines are the most popular carriers operating from Idaho to Washington

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

1,242 flights are operational weekly from Idaho to State of Washington as of July 2025. The most popular departure day for this route is Wed, with 16% of flights per week taking off on this day.

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 64% 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.

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 23m and 1h 33m, respectively.

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 177 per day as of July 2025. The most frequent departure time is 4:00PM, with 47% of daily flights leaving at noon.

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 6 as of July 2025.

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.

$76 Cheap Flights from Idaho to Washington in 2025

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Find the cheapest flights from Idaho to Washington

Round-trip

One-way

Last minute

Direct

Cheap round-trip flights

9:00 am - 9:45 amBOI-SEA

1h 45mnonstop

9:25 pm - 11:57 pmSEA-BOI

1h 32mnonstop

$117Delta

Find Deal

Tue, Sep 9 - Wed, Sep 17

4:00 pm - 4:21 pmBOI-PDX

1h 21mnonstop

2:30 pm - 4:48 pmPDX-BOI

1h 18mnonstop

$117Alaska Airlines

Find Deal

Tue, Aug 12 - Tue, Aug 19

7:15 am - 7:24 amBOI-GEG

1h 09mnonstop

5:12 am - 7:20 amGEG-BOI

1h 08mnonstop

$117Alaska Airlines

Find Deal

Sat, Aug 23 - Tue, Aug 26

5:04 pm - 5:41 pmIDA-PDX

1h 37mnonstop

1:38 pm - 4:14 pmPDX-IDA

1h 36mnonstop

$119Allegiant Air

Find Deal

Fri, Aug 1 - Mon, Aug 11

6:51 pm - 6:59 pmBOI-GEG

1h 08mnonstop

6:00 am - 8:07 amGEG-BOI

1h 07mnonstop

$127Hawaiian Airlines

Find Deal

Sat, Aug 16 - Sun, Aug 17

4:50 pm - 5:26 pmBOI-SEA

1h 36mnonstop

8:17 am - 10:45 amSEA-BOI

1h 28mnonstop

$128Hawaiian Airlines

Find Deal

Sat, Aug 16 - Sun, Aug 17

5:04 pm - 5:41 pmIDA-PDX

1h 37mnonstop

1:38 pm - 4:14 pmPDX-IDA

1h 36mnonstop

$137Allegiant Air

Find Deal

Fri, Aug 1 - Mon, Aug 4

2:05 pm - 2:45 pmBOI-SEA

1h 40mnonstop

5:45 pm - 8:20 pmSEA-BOI

1h 35mnonstop

$137Delta

Find Deal

Thu, Sep 25 - Sat, Sep 27

2:45 pm - 9:50 pmBOI-SEA

8h 05m1 stop

8:00 am - 3:20 pmSEA-BOI

6h 20m1 stop

$151Southwest

Find Deal

Sat, Sep 13 - Tue, Sep 16

5:10 am - 9:15 amBOI-GEG

5h 05m1 stop

5:10 pm - 11:05 pmGEG-BOI

4h 55m1 stop

$151Southwest

Find Deal

Sat, Aug 23 - Mon, Aug 25

Delta flights from Idaho to State of Washington

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

Delta

Sep 9

BOI9:00 amBoise Air Term. Gowen Fld

1h 45m

SEA9:45 amSeattle/Tacoma Intl

Sep 17

SEA9:25 pmSeattle/Tacoma Intl

1h 32m

BOI11:57 pmBoise Air Term. Gowen Fld

$117

Find similar

Delta

Sep 25

BOI2:05 pmBoise Air Term. Gowen Fld

1h 40m

SEA2:45 pmSeattle/Tacoma Intl

Sep 27

SEA5:45 pmSeattle/Tacoma Intl

1h 35m

BOI8:20 pmBoise Air Term. Gowen Fld

$137

Find similar

Delta

Sep 12

GEG5:30 pmSpokane

1h 25m

SEA6:55 pmSeattle/Tacoma Intl

Sep 13

SEA9:30 amSeattle/Tacoma Intl

1h 16m

GEG10:46 amSpokane

$147

Find similar

Hawaiian Airlines flights from Idaho to State of Washington

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

Hawaiian Airlines

Aug 16

BOI6:51 pmBoise Air Term. Gowen Fld

1h 08m

GEG6:59 pmSpokane

Aug 17

GEG6:00 amSpokane

1h 07m

BOI8:07 amBoise Air Term. Gowen Fld

$127

Find similar

Hawaiian Airlines

Aug 16

BOI4:50 pmBoise Air Term. Gowen Fld

1h 36m

SEA5:26 pmSeattle/Tacoma Intl

Aug 17

SEA8:17 amSeattle/Tacoma Intl

1h 28m

BOI10:45 amBoise Air Term. Gowen Fld

$128

Find similar

Hawaiian Airlines

Aug 16

BOI2:44 pmBoise Air Term. Gowen Fld

1h 11m

GEG2:55 pmSpokane

Aug 17

GEG6:00 amSpokane

1h 07m

BOI8:07 amBoise Air Term. Gowen Fld

$130

Find similar

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 October is, on average, the cheapest month to fly to State of Washington from Idaho, with most prices found around $166. If you aren’t able to travel to State of Washington during the month of October, then flying in September is also cheap. Prices for this month can be found on momondo for an average of $176.

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 Thursday. Travelers who choose to depart for State of Washington on a Thursday will often find tickets for as low as $413. 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 $520.

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 evening when flights can be purchased for as low as $390. If you have a flexible travel schedule, then try to avoid flying in the morning when prices are $476 on average. Flights to State of Washington from Idaho in the morning 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 Idaho Falls Fanning Field to Seattle/Tacoma Intl for the best Idaho - Washington flight prices

How far in advance should I book a flight to State of 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 $195 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 $170 on momondo.

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

There are 4 cabin classes available to choose from on Idaho to 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?

No. A direct flight is the cheapest option for a flight between 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	$76
Fastest flight time	1h 06m
Direct flights	Every day
Airports in State of Washington	3 airports

The best one-way flight to State of Washington from Idaho in the past 72 hours is $76. The best round-trip flight deal from Idaho to State of Washington found on momondo in the last 72 hours is $117.

The fastest flight from Idaho to State of Washington takes 1h 06m

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

There are 3 airports near State of Washington: Portland (PDX), Spokane (GEG), Seattle/Tacoma Intl (SEA)

Search flight deals

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 6 as of July 2025.
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 Embraer 175, representing 52.81% of all bookings. The subsequent popular models are Boeing 737-900 Passenger/BBJ3 (winglets) at 14.28%, Boeing 737-800 Passenger/BBJ2 (winglets) at 11.82%, and Boeing 737 at 7.41%.

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
Delta	PriceFrom $95	Free Cancellation	Rating 8.0 7,956 reviews	Search Delta flights
Hawaiian Airlines	PriceFrom $117	Free Cancellation	Rating 7.8 2,577 reviews	Search Hawaiian Airlines flights
Alaska Airlines	PriceFrom $124	Free Cancellation	Rating 8.0 10,000 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

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Flights to Atlantafrom $49

Flights to Seattlefrom $81

Cheap flights from Idaho to Washington from $76

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 8/11. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

Big names and deals

Big names and deals

Filter for what you want

Filter for what you want

Trusted and free

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Find the cheapest flights from Idaho to Washington

Cheap round-trip flights

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Cheap last minute flights

Cheap direct flights

Delta flights from Idaho to State of Washington

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

Hawaiian Airlines flights from Idaho to State of Washington

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

See travel insights to Washington from

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

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?

Fly from Idaho Falls Fanning Field to Seattle/Tacoma Intl for the best Idaho - Washington flight prices

How far in advance should I book a flight to State of Washington?

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

There are 4 cabin classes available to choose from on Idaho to 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?

No. A direct flight is the cheapest option for a flight between Idaho to State of Washington.

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

Southwest, Spirit Airlines, and Hawaiian Airlines are the most popular carriers operating 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?

The number of flights available between Idaho and State of Washington is 177 per day as of July 2025. The most frequent departure time is 4:00PM, with 47% of daily flights leaving at noon.

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

1,242 flights are operational weekly from Idaho to State of Washington as of July 2025. The most popular departure day for this route is Wed, with 16% of flights per week taking off on this day.

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 23m and 1h 33m, respectively.

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

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

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

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

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

What is the most popular plane model from Idaho to State of 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?

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

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

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

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

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

Popular cities in Washington

Popular flights according to clicks in the last 7 days on momondo