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.

$94 CHEAP FLIGHTS from Idaho to Seattle

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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

Tue, Nov 17 - Tue, Nov 17

5:00 am - 6:12 amGEG Spokane-SEA Seattle/Tacoma Intl

1h 12mnonstop

8:33 am - 6:11 pmSEA Seattle/Tacoma Intl-GEG Spokane

9h 38m2 stops Sacramento Intl Boise Air Term. Gowen Fld

$111Alaska Airlines

Wed, Nov 4 - Wed, Nov 4

1:53 pm - 2:31 pmBOI Boise Air Term. Gowen Fld-SEA Seattle/Tacoma Intl

1h 38mnonstop

5:30 pm - 1:28 pmSEA Seattle/Tacoma Intl-BOI Boise Air Term. Gowen Fld

18h 58m1 stop San Diego

$172Alaska Airlines

Thu, Oct 29 - Thu, Oct 29

7:20 am - 6:02 pmBOI Boise Air Term. Gowen Fld-SEA Seattle/Tacoma Intl

11h 42m1 stop San Diego

9:29 pm - 11:59 pmSEA Seattle/Tacoma Intl-BOI Boise Air Term. Gowen Fld

1h 30mnonstop

$172Alaska Airlines

Tue, Oct 13 - Sun, Nov 1

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, Oct 15 - Thu, Nov 5

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

Tue, Oct 13 - Tue, Nov 3

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 10 - Sat, Oct 17

2:35 pm - 9:03 pmBOI Boise Air Term. Gowen Fld-SEA Seattle/Tacoma Intl

7h 28m1 stop San Francisco

7:11 am - 12:58 pmSEA Seattle/Tacoma Intl-BOI Boise Air Term. Gowen Fld

4h 47m1 stop San Francisco

$227United Airlines

Tue, Sep 29 - Tue, Oct 6

2:20 pm - 6:44 pmBOI Boise Air Term. Gowen Fld-SEA Seattle/Tacoma Intl

5h 24m1 stop San Francisco

3:18 pm - 11:59 pmSEA Seattle/Tacoma Intl-BOI Boise Air Term. Gowen Fld

7h 41m1 stop San Francisco

$227United Airlines

Sun, Oct 4 - Tue, Nov 10

7:30 pm - 9:42 amGEG Spokane-SEA Seattle/Tacoma Intl

14h 12m1 stop Las Vegas Harry Reid Intl

8:09 pm - 7:13 pmSEA Seattle/Tacoma Intl-GEG Spokane

47h 04m2 stops Los Angeles Los Angeles Las Vegas Harry Reid Intl

$287Multiple Airlines

Sun, Oct 4 - Wed, Nov 11

7:30 pm - 9:42 amGEG Spokane-SEA Seattle/Tacoma Intl

14h 12m1 stop Las Vegas Harry Reid Intl

8:09 pm - 7:13 pmSEA Seattle/Tacoma Intl-GEG Spokane

23h 04m2 stops Los Angeles Los Angeles Las Vegas Harry Reid Intl

$296Multiple Airlines

Recent last minute flight deals from Idaho to Seattle

Sun, Aug 30 - Mon, Aug 31

6:49 pm - 9:20 amBOI Boise Air Term. Gowen Fld-SEA Seattle/Tacoma Intl

15h 31m1 stop San Diego

11:50 am - 2:22 pmSEA Seattle/Tacoma Intl-BOI Boise Air Term. Gowen Fld

1h 32mnonstop

$307Alaska Airlines

Fri, Aug 28 - Fri, Sep 4

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

$309Delta

Wed, Aug 26 - Thu, Aug 27

6:49 pm - 6:52 pmBOI Boise Air Term. Gowen Fld-SEA Seattle/Tacoma Intl

25h 03m1 stop San Diego

9:18 pm - 11:44 pmSEA Seattle/Tacoma Intl-BOI Boise Air Term. Gowen Fld

1h 26mnonstop

$317Alaska Airlines

Fri, Aug 28 - Fri, Sep 4

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

4h 31m1 stop Salt Lake City

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

1h 24mnonstop

$318Delta

Sat, Aug 29 - Mon, Aug 31

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

$329Delta

Sun, Aug 30 - Mon, Aug 31

6:49 pm - 9:20 amBOI Boise Air Term. Gowen Fld-SEA Seattle/Tacoma Intl

15h 31m1 stop San Diego

11:50 am - 2:22 pmSEA Seattle/Tacoma Intl-BOI Boise Air Term. Gowen Fld

1h 32mnonstop

$347Alaska Airlines

Sun, Aug 30 - Mon, Aug 31

12:24 pm - 9:19 amBOI Boise Air Term. Gowen Fld-SEA Seattle/Tacoma Intl

21h 55m1 stop Denver Intl

7:06 pm - 12:29 pmSEA Seattle/Tacoma Intl-BOI Boise Air Term. Gowen Fld

16h 23m1 stop Denver Intl

$350Frontier

Sun, Aug 30 - Mon, Aug 31

12:24 pm - 9:19 amBOI Boise Air Term. Gowen Fld-SEA Seattle/Tacoma Intl

21h 55m1 stop Denver Intl

7:06 pm - 12:29 pmSEA Seattle/Tacoma Intl-BOI Boise Air Term. Gowen Fld

16h 23m1 stop Denver Intl

$360Frontier

Thu, Aug 27 - Sun, Aug 30

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

7h 39m1 stop Denver Intl

8:40 am - 5:49 pmSEA Seattle/Tacoma Intl-JAC Jackson Hole

8h 09m1 stop Denver Intl

$541United Airlines

Thu, Aug 27 - Sun, Aug 30

8:05 am - 9:15 pmJAC Jackson Hole-SEA Seattle/Tacoma Intl

14h 10m2 stops Los Angeles Los Angeles Denver Intl

9:05 am - 4:39 pmSEA Seattle/Tacoma Intl-JAC Jackson Hole

6h 34m1 stop San Francisco

$606United Airlines

Recent direct flight deals from Idaho to Seattle

Tue, Oct 13 - Sun, Nov 1

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, Oct 15 - Thu, Nov 5

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

Tue, Oct 13 - Tue, Nov 3

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, Oct 16 - Tue, Nov 3

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

Tue, Oct 13 - Wed, Nov 4

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

Wed, Oct 7 - Wed, Oct 14

4:18 pm - 4:56 pmBOI Boise Air Term. Gowen Fld-SEA Seattle/Tacoma Intl

1h 38mnonstop

9:57 am - 12:35 pmSEA Seattle/Tacoma Intl-BOI Boise Air Term. Gowen Fld

1h 38mnonstop

$191Alaska Airlines

Sat, Sep 19 - Sun, Sep 20

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

1h 36mnonstop

8:08 pm - 10:38 pmSEA Seattle/Tacoma Intl-BOI Boise Air Term. Gowen Fld

1h 30mnonstop

$191Alaska Airlines

Sat, Dec 5 - Tue, Dec 15

1:00 pm - 1:39 pmBOI Boise Air Term. Gowen Fld-SEA Seattle/Tacoma Intl

1h 39mnonstop

9:50 am - 12:21 pmSEA Seattle/Tacoma Intl-BOI Boise Air Term. Gowen Fld

1h 31mnonstop

$201Alaska Airlines

Tue, Oct 6 - Tue, Oct 13

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

1h 35mnonstop

7:17 am - 9:56 amSEA Seattle/Tacoma Intl-BOI Boise Air Term. Gowen Fld

1h 39mnonstop

$207Alaska Airlines

Sat, Sep 5 - Sun, Sep 6

9:33 am - 11:05 amGEG Spokane-SEA Seattle/Tacoma Intl

1h 32mnonstop

6:15 pm - 7:32 pmSEA Seattle/Tacoma Intl-GEG Spokane

1h 17mnonstop

$367JetBlue

Useful Info

Low season	January
High season	July
Cheapest flight	$94

Best time to beat the crowds with an average 24% drop in price.

Most popular time to fly with an average 24% 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

$94 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

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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

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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