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.

$79 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

Thu, Oct 29 - Mon, Nov 2

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

$187Delta

Wed, Feb 3 - Thu, Feb 11

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

$187Delta

Wed, Feb 3 - Thu, Feb 11

12:30 pm - 6:30 pmLWS Lewiston Nez Perce Rgnl-SEA Seattle/Tacoma Intl

6h 00m1 stop Salt Lake City

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

1h 19mnonstop

$196Delta

Thu, Oct 29 - Mon, Nov 2

12:19 pm - 4:55 pmLWS Lewiston Nez Perce Rgnl-SEA Seattle/Tacoma Intl

4h 36m1 stop Salt Lake City

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

1h 21mnonstop

$196Delta

Tue, Jan 26 - Tue, Feb 2

11:23 am - 12:15 pmSUN Hailey Sun Valley-Friedman-SEA Seattle/Tacoma Intl

1h 52mnonstop

4:21 pm - 6:55 pmSEA Seattle/Tacoma Intl-SUN Hailey Sun Valley-Friedman

1h 34mnonstop

$217Alaska Airlines

Thu, Nov 5 - Wed, Nov 11

8:59 pm - 9:37 pmBOI Boise Air Term. Gowen Fld-SEA Seattle/Tacoma Intl

1h 38mnonstop

11:59 am - 2:27 pmSEA Seattle/Tacoma Intl-BOI Boise Air Term. Gowen Fld

1h 28mnonstop

$217Alaska Airlines

Thu, Dec 17 - Sun, Jan 10

11:55 am - 4:32 pmBOI Boise Air Term. Gowen Fld-SEA Seattle/Tacoma Intl

5h 37m1 stop San Francisco

5:00 am - 11:16 amSEA Seattle/Tacoma Intl-BOI Boise Air Term. Gowen Fld

5h 16m1 stop San Francisco

$217United Airlines

Fri, Nov 6 - Tue, Nov 10

12:49 pm - 1:26 pmBOI Boise Air Term. Gowen Fld-SEA Seattle/Tacoma Intl

1h 37mnonstop

9:56 am - 12:25 pmSEA Seattle/Tacoma Intl-BOI Boise Air Term. Gowen Fld

1h 29mnonstop

$217Alaska Airlines

Wed, Dec 23 - Thu, Dec 31

6:10 pm - 1:05 amBOI Boise Air Term. Gowen Fld-SEA Seattle/Tacoma Intl

7h 55m1 stop Phoenix Sky Harbor Intl

11:35 am - 10:45 pmSEA Seattle/Tacoma Intl-BOI Boise Air Term. Gowen Fld

10h 10m1 stop Sacramento Intl

$220Southwest

Wed, Feb 17 - Sat, Feb 20

4:45 pm - 9:35 pmBOI Boise Air Term. Gowen Fld-SEA Seattle/Tacoma Intl

5h 50m1 stop Oakland

7:35 am - 2:25 pmSEA Seattle/Tacoma Intl-BOI Boise Air Term. Gowen Fld

5h 50m1 stop Oakland

$227Southwest

Recent last minute flight deals from Idaho to Seattle

Fri, Oct 9 - Mon, Oct 12

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

$379Delta

Thu, Oct 8 - Mon, Oct 12

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

$379Delta

Thu, Oct 8 - Sun, Oct 11

2:50 pm - 9:48 amBOI Boise Air Term. Gowen Fld-SEA Seattle/Tacoma Intl

19h 58m1 stop Las Vegas Harry Reid Intl

9:16 pm - 1:55 pmSEA Seattle/Tacoma Intl-BOI Boise Air Term. Gowen Fld

15h 39m1 stop Las Vegas Harry Reid Intl

$399Frontier

Thu, Oct 8 - Sun, Oct 11

2:50 pm - 9:48 amBOI Boise Air Term. Gowen Fld-SEA Seattle/Tacoma Intl

19h 58m1 stop Las Vegas Harry Reid Intl

9:16 pm - 1:55 pmSEA Seattle/Tacoma Intl-BOI Boise Air Term. Gowen Fld

15h 39m1 stop Las Vegas Harry Reid Intl

$399Frontier

Thu, Oct 8 - Mon, Oct 12

12:19 pm - 4:55 pmLWS Lewiston Nez Perce Rgnl-SEA Seattle/Tacoma Intl

4h 36m1 stop Salt Lake City

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

1h 21mnonstop

$408Delta

Fri, Oct 9 - Mon, Oct 12

12:19 pm - 6:52 pmLWS Lewiston Nez Perce Rgnl-SEA Seattle/Tacoma Intl

6h 33m1 stop Salt Lake City

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

1h 21mnonstop

$408Delta

Sun, Oct 11 - Sun, Oct 18

2:50 pm - 9:48 amBOI Boise Air Term. Gowen Fld-SEA Seattle/Tacoma Intl

19h 58m1 stop Las Vegas Harry Reid Intl

9:16 pm - 1:55 pmSEA Seattle/Tacoma Intl-BOI Boise Air Term. Gowen Fld

15h 39m1 stop Las Vegas Harry Reid Intl

$419Frontier

Tue, Oct 13 - Tue, Oct 13

7:20 am - 2:17 pmBOI Boise Air Term. Gowen Fld-SEA Seattle/Tacoma Intl

7h 57m1 stop San Diego

5:40 pm - 8:06 pmSEA Seattle/Tacoma Intl-BOI Boise Air Term. Gowen Fld

1h 26mnonstop

$457Alaska Airlines

Mon, Oct 12 - Mon, Oct 12

6:43 am - 7:20 amBOI Boise Air Term. Gowen Fld-SEA Seattle/Tacoma Intl

1h 37mnonstop

10:20 am - 10:51 pmSEA Seattle/Tacoma Intl-BOI Boise Air Term. Gowen Fld

11h 31m1 stop San Diego

$463Alaska Airlines

Sun, Oct 11 - Sun, Oct 11

6:43 am - 7:20 amBOI Boise Air Term. Gowen Fld-SEA Seattle/Tacoma Intl

1h 37mnonstop

10:20 am - 10:51 pmSEA Seattle/Tacoma Intl-BOI Boise Air Term. Gowen Fld

11h 31m1 stop San Diego

$503Alaska Airlines

Recent direct flight deals from Idaho to Seattle

Wed, Feb 3 - Thu, Feb 11

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

$187Delta

Thu, Oct 29 - Mon, Nov 2

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

$187Delta

Fri, Dec 18 - Sun, Jan 3

9:08 am - 10:39 amLWS Lewiston Nez Perce Rgnl-SEA Seattle/Tacoma Intl

1h 31mnonstop

9:40 pm - 10:59 pmSEA Seattle/Tacoma Intl-LWS Lewiston Nez Perce Rgnl

1h 19mnonstop

$207Delta

Tue, Jan 26 - Tue, Feb 2

11:23 am - 12:15 pmSUN Hailey Sun Valley-Friedman-SEA Seattle/Tacoma Intl

1h 52mnonstop

4:21 pm - 6:55 pmSEA Seattle/Tacoma Intl-SUN Hailey Sun Valley-Friedman

1h 34mnonstop

$217Alaska Airlines

Thu, Nov 5 - Wed, Nov 11

8:59 pm - 9:37 pmBOI Boise Air Term. Gowen Fld-SEA Seattle/Tacoma Intl

1h 38mnonstop

11:59 am - 2:27 pmSEA Seattle/Tacoma Intl-BOI Boise Air Term. Gowen Fld

1h 28mnonstop

$217Alaska Airlines

Sat, Nov 14 - Sun, Nov 15

6:40 am - 7:40 amBOI Boise Air Term. Gowen Fld-SEA Seattle/Tacoma Intl

2h 00mnonstop

7:15 am - 9:57 amSEA Seattle/Tacoma Intl-BOI Boise Air Term. Gowen Fld

1h 42mnonstop

$217Delta

Sat, Nov 7 - Mon, Nov 9

10:34 am - 11:31 amBOI Boise Air Term. Gowen Fld-SEA Seattle/Tacoma Intl

1h 57mnonstop

7:15 am - 9:57 amSEA Seattle/Tacoma Intl-BOI Boise Air Term. Gowen Fld

1h 42mnonstop

$217Delta

Sat, Nov 7 - Sun, Nov 8

3:36 pm - 4:24 pmBOI Boise Air Term. Gowen Fld-SEA Seattle/Tacoma Intl

1h 48mnonstop

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

1h 28mnonstop

$217Delta

Sat, Nov 7 - Sun, Nov 8

5:59 pm - 6:41 pmBOI Boise Air Term. Gowen Fld-SEA Seattle/Tacoma Intl

1h 42mnonstop

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

1h 28mnonstop

$217Delta

Wed, Dec 2 - Sun, Dec 6

6:37 am - 7:25 amBOI Boise Air Term. Gowen Fld-SEA Seattle/Tacoma Intl

1h 48mnonstop

11:51 am - 2:19 pmSEA Seattle/Tacoma Intl-BOI Boise Air Term. Gowen Fld

1h 28mnonstop

$217Alaska Airlines

Useful Info

Low season	January
High season	July
Cheapest flight	$79

Best time to beat the crowds with an average 26% drop in price.

Most popular time to fly with an average 23% increase in price.

Flight from Boise to Seattle

Verified travelerFlew with Alaska Airlines-Sep 2026

You may get bussed from plane to terminal & vis-a-versa. Just a heads up.

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

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$79 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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Flights from Idaho to Seattle: the best tips from KAYAK users

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