How does KAYAK find such low prices on flights from Idaho to Seattle?

KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Idaho to Seattle.

How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Idaho to Seattle?

KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Seattle from Idaho is likely to change within 7 days, so travelers know whether to wait or book now.

What is the Hacker Fare option on flights from Idaho to Seattle?

Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Seattle with an airline and back to Idaho with another airline.

What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Idaho to Seattle?

Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Seattle from Idaho up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

$85 CHEAP FLIGHTS from Idaho to Seattle

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Flight Deals

Cheap Flights from Idaho to Seattle

Discover the best prices for you by selecting your travel dates on KAYAK.

Round-trip

One-way

Last minute

Direct

Recent round-trip flight deals from Idaho to Seattle

Mon, Sep 21 - Wed, Sep 23

2:50 pm - 9:42 amBOI Boise Air Term. Gowen Fld-SEA Seattle/Tacoma Intl

19h 52m1 stop Las Vegas Harry Reid Intl

9:45 pm - 1:55 pmSEA Seattle/Tacoma Intl-BOI Boise Air Term. Gowen Fld

15h 10m1 stop Las Vegas Harry Reid Intl

$164Frontier

Tue, Sep 1 - Sat, Sep 5

1:24 pm - 9:19 amBOI Boise Air Term. Gowen Fld-SEA Seattle/Tacoma Intl

20h 55m1 stop Denver Intl

7:06 pm - 11:29 amSEA Seattle/Tacoma Intl-BOI Boise Air Term. Gowen Fld

15h 23m1 stop Denver Intl

$176Frontier

Thu, Sep 10 - Sun, Sep 20

2:50 pm - 9:42 amBOI Boise Air Term. Gowen Fld-SEA Seattle/Tacoma Intl

19h 52m1 stop Las Vegas Harry Reid Intl

9:45 pm - 1:55 pmSEA Seattle/Tacoma Intl-BOI Boise Air Term. Gowen Fld

15h 10m1 stop Las Vegas Harry Reid Intl

$178Frontier

Sat, Sep 12 - Sat, Sep 12

1:36 pm - 2:50 pmGEG Spokane-SEA Seattle/Tacoma Intl

1h 14mnonstop

4:59 pm - 11:53 pmSEA Seattle/Tacoma Intl-GEG Spokane

6h 54m1 stop San Diego

$181Alaska Airlines

Mon, Sep 14 - Mon, Sep 14

4:20 pm - 4:56 pmBOI Boise Air Term. Gowen Fld-SEA Seattle/Tacoma Intl

1h 36mnonstop

8:38 pm - 6:09 pmSEA Seattle/Tacoma Intl-BOI Boise Air Term. Gowen Fld

20h 31m1 stop Las Vegas Harry Reid Intl

$182Alaska Airlines

Mon, Oct 12 - Mon, Oct 12

2:06 pm - 2:41 pmBOI Boise Air Term. Gowen Fld-SEA Seattle/Tacoma Intl

1h 35mnonstop

6:23 pm - 10:01 pmSEA Seattle/Tacoma Intl-BOI Boise Air Term. Gowen Fld

26h 38m1 stop Las Vegas Harry Reid Intl

$182Alaska Airlines

Thu, Sep 10 - Sun, Sep 13

9:16 am - 10:45 amLWS Lewiston Nez Perce Rgnl-SEA Seattle/Tacoma Intl

1h 29mnonstop

9:45 pm - 11:08 pmSEA Seattle/Tacoma Intl-LWS Lewiston Nez Perce Rgnl

1h 23mnonstop

$189Delta

Fri, Oct 9 - Sat, Oct 10

9:15 am - 10:45 amLWS Lewiston Nez Perce Rgnl-SEA Seattle/Tacoma Intl

1h 30mnonstop

9:45 pm - 11:06 pmSEA Seattle/Tacoma Intl-LWS Lewiston Nez Perce Rgnl

1h 21mnonstop

$189Delta

Thu, Sep 17 - Sun, Sep 20

4:25 pm - 9:15 pmJAC Jackson Hole-SEA Seattle/Tacoma Intl

5h 50m1 stop Denver Intl

5:00 am - 12:49 pmSEA Seattle/Tacoma Intl-JAC Jackson Hole

6h 49m1 stop Denver Intl

$307United Airlines

Wed, Nov 25 - Wed, Dec 2

4:10 pm - 9:19 pmJAC Jackson Hole-SEA Seattle/Tacoma Intl

6h 09m1 stop Denver Intl

6:57 am - 1:57 pmSEA Seattle/Tacoma Intl-JAC Jackson Hole

6h 00m1 stop San Francisco

$314United Airlines

Recent last minute flight deals from Idaho to Seattle

Sun, Aug 16 - Wed, Sep 16

1:24 pm - 9:04 amBOI Boise Air Term. Gowen Fld-SEA Seattle/Tacoma Intl

20h 40m1 stop Denver Intl

9:45 pm - 1:55 pmSEA Seattle/Tacoma Intl-BOI Boise Air Term. Gowen Fld

15h 10m1 stop Las Vegas Harry Reid Intl

$281Frontier

Sun, Aug 16 - Wed, Sep 16

1:24 pm - 9:04 amBOI Boise Air Term. Gowen Fld-SEA Seattle/Tacoma Intl

20h 40m1 stop Denver Intl

4:27 pm - 1:55 pmSEA Seattle/Tacoma Intl-BOI Boise Air Term. Gowen Fld

20h 28m2 stops Denver Intl Las Vegas Harry Reid Intl

$283Frontier

Sun, Aug 16 - Sat, Aug 22

9:23 am - 10:53 amLWS Lewiston Nez Perce Rgnl-SEA Seattle/Tacoma Intl

1h 30mnonstop

9:30 pm - 10:54 pmSEA Seattle/Tacoma Intl-LWS Lewiston Nez Perce Rgnl

1h 24mnonstop

$329Delta

Thu, Aug 13 - Wed, Aug 26

1:24 pm - 9:04 amBOI Boise Air Term. Gowen Fld-SEA Seattle/Tacoma Intl

20h 40m1 stop Denver Intl

7:06 pm - 11:29 amSEA Seattle/Tacoma Intl-BOI Boise Air Term. Gowen Fld

15h 23m1 stop Denver Intl

$329Frontier

Sun, Aug 16 - Sat, Aug 22

12:23 pm - 4:54 pmLWS Lewiston Nez Perce Rgnl-SEA Seattle/Tacoma Intl

4h 31m1 stop Salt Lake City

9:30 pm - 10:54 pmSEA Seattle/Tacoma Intl-LWS Lewiston Nez Perce Rgnl

1h 24mnonstop

$338Delta

Sat, Aug 15 - Sat, Aug 15

8:15 am - 4:58 pmGEG Spokane-SEA Seattle/Tacoma Intl

8h 43m1 stop San Diego

7:50 pm - 8:56 pmSEA Seattle/Tacoma Intl-GEG Spokane

1h 06mnonstop

$343Alaska Airlines

Fri, Aug 14 - Sun, Aug 16

9:23 am - 10:53 amLWS Lewiston Nez Perce Rgnl-SEA Seattle/Tacoma Intl

1h 30mnonstop

9:35 pm - 10:59 pmSEA Seattle/Tacoma Intl-LWS Lewiston Nez Perce Rgnl

1h 24mnonstop

$389Delta

Sun, Aug 16 - Wed, Sep 16

6:13 pm - 6:53 pmBOI Boise Air Term. Gowen Fld-SEA Seattle/Tacoma Intl

1h 40mnonstop

1:03 pm - 3:30 pmSEA Seattle/Tacoma Intl-BOI Boise Air Term. Gowen Fld

1h 27mnonstop

$440Alaska Airlines

Thu, Aug 13 - Sun, Aug 16

9:28 am - 4:14 pmJAC Jackson Hole-SEA Seattle/Tacoma Intl

7h 46m1 stop San Francisco

6:08 am - 1:55 pmSEA Seattle/Tacoma Intl-JAC Jackson Hole

6h 47m1 stop Los Angeles

$626United Airlines

Sun, Aug 16 - Tue, Aug 18

4:25 pm - 11:04 pmJAC Jackson Hole-SEA Seattle/Tacoma Intl

7h 39m1 stop Denver Intl

5:00 am - 12:49 pmSEA Seattle/Tacoma Intl-JAC Jackson Hole

6h 49m1 stop Denver Intl

$780United Airlines

Recent direct flight deals from Idaho to Seattle

Thu, Sep 10 - Sun, Sep 13

9:16 am - 10:45 amLWS Lewiston Nez Perce Rgnl-SEA Seattle/Tacoma Intl

1h 29mnonstop

9:45 pm - 11:08 pmSEA Seattle/Tacoma Intl-LWS Lewiston Nez Perce Rgnl

1h 23mnonstop

$189Delta

Tue, Oct 13 - Tue, Oct 20

9:15 am - 10:45 amLWS Lewiston Nez Perce Rgnl-SEA Seattle/Tacoma Intl

1h 30mnonstop

9:45 pm - 11:06 pmSEA Seattle/Tacoma Intl-LWS Lewiston Nez Perce Rgnl

1h 21mnonstop

$189Delta

Sat, Oct 24 - Mon, Oct 26

9:15 am - 10:45 amLWS Lewiston Nez Perce Rgnl-SEA Seattle/Tacoma Intl

1h 30mnonstop

9:45 pm - 11:06 pmSEA Seattle/Tacoma Intl-LWS Lewiston Nez Perce Rgnl

1h 21mnonstop

$189Delta

Sat, Oct 17 - Wed, Oct 21

9:15 am - 10:45 amLWS Lewiston Nez Perce Rgnl-SEA Seattle/Tacoma Intl

1h 30mnonstop

9:45 pm - 11:06 pmSEA Seattle/Tacoma Intl-LWS Lewiston Nez Perce Rgnl

1h 21mnonstop

$189Delta

Fri, Jan 29 - Mon, Feb 1

6:25 am - 7:55 amLWS Lewiston Nez Perce Rgnl-SEA Seattle/Tacoma Intl

1h 30mnonstop

9:30 pm - 10:49 pmSEA Seattle/Tacoma Intl-LWS Lewiston Nez Perce Rgnl

1h 19mnonstop

$189Delta

Thu, Oct 8 - Sat, Oct 10

6:45 am - 7:39 amBOI Boise Air Term. Gowen Fld-SEA Seattle/Tacoma Intl

1h 54mnonstop

8:59 am - 11:27 amSEA Seattle/Tacoma Intl-BOI Boise Air Term. Gowen Fld

1h 28mnonstop

$201JetBlue

Wed, Sep 16 - Sat, Sep 19

4:20 pm - 4:56 pmBOI Boise Air Term. Gowen Fld-SEA Seattle/Tacoma Intl

1h 36mnonstop

11:43 am - 2:22 pmSEA Seattle/Tacoma Intl-BOI Boise Air Term. Gowen Fld

1h 39mnonstop

$207Alaska Airlines

Tue, Dec 1 - Tue, Dec 8

5:43 pm - 6:22 pmBOI Boise Air Term. Gowen Fld-SEA Seattle/Tacoma Intl

1h 39mnonstop

8:17 am - 10:42 amSEA Seattle/Tacoma Intl-BOI Boise Air Term. Gowen Fld

1h 25mnonstop

$207Alaska Airlines

Sat, Sep 12 - Sat, Sep 19

4:20 pm - 4:56 pmBOI Boise Air Term. Gowen Fld-SEA Seattle/Tacoma Intl

1h 36mnonstop

7:15 am - 9:56 amSEA Seattle/Tacoma Intl-BOI Boise Air Term. Gowen Fld

1h 41mnonstop

$207Alaska Airlines

Wed, Sep 23 - Sat, Sep 26

4:20 pm - 4:56 pmBOI Boise Air Term. Gowen Fld-SEA Seattle/Tacoma Intl

1h 36mnonstop

1:03 pm - 3:30 pmSEA Seattle/Tacoma Intl-BOI Boise Air Term. Gowen Fld

1h 27mnonstop

$207Alaska Airlines

Useful Info

Low season	January
High season	July
Cheapest flight	$85

Best time to beat the crowds with an average 23% drop in price.

Most popular time to fly with an average 25% increase in price.

Flight from Boise to Seattle

AllisonFlew with Alaska Airlines-Mar 2026

Boise airport is quick to get through security and very easy to navigate, so you don’t need to give yourself as much time as you normally would at larger airports.

Verified travelerFlew with Hawaiian Airlines-Jun 2025

Idaho Falls is not a large airport, so it was easy to find my way around. Take a meal if you want more than a snack.

How does KAYAK find such low prices on flights from Idaho to Seattle?
KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Idaho to Seattle.
How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Idaho to Seattle?
KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Seattle from Idaho is likely to change within 7 days, so travelers know whether to wait or book now.
What is the Hacker Fare option on flights from Idaho to Seattle?
Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Seattle with an airline and back to Idaho with another airline.
What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Idaho to Seattle?
Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Seattle from Idaho up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Lynnwood

Centralia

Fife

Lakewood

Westport

Lacey

Mukilteo

Woodinville

Poulsbo

Edmonds

Aberdeen

DuPont

Shoreline

Monroe

Castle Rock

Edgewood

Everything you need to know for your flight to Seattle

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Seattle (SEA)

SEA

$85 Find Cheap Flights from Idaho to Seattle - Compare and Save

Cheap Flights from Idaho to Seattle

Recent round-trip flight deals from Idaho to Seattle

Recent one-way flight deals from Idaho to Seattle

Recent last minute flight deals from Idaho to Seattle

Recent direct flight deals from Idaho to Seattle

Good to know

Low season

High season

Cheapest flight

Flights from Idaho to Seattle: the best tips from KAYAK users

FAQs for booking flights from Idaho to Seattle

Traveling to a place near Seattle?

Everything you need to know for your flight to Seattle

Information on the airport you'll fly into in Seattle

Cabin class types available on flights to Idaho

Complete your trip to Seattle with a hotel stay or car rental

Find direct flights for Seattle

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Flights from domestic origins to Seattle

Choose which airport to fly into in Seattle

Find deals for your return flight