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.

$114 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

Fri, Dec 18 - Wed, Dec 23

5:00 pm - 5:43 pmBOI Boise Air Term. Gowen Fld-SEA Seattle/Tacoma Intl

1h 43mnonstop

7:15 am - 9:44 amSEA Seattle/Tacoma Intl-BOI Boise Air Term. Gowen Fld

1h 29mnonstop

$217Alaska Airlines

Mon, Nov 23 - Tue, Dec 1

7:21 pm - 8:01 pmBOI Boise Air Term. Gowen Fld-SEA Seattle/Tacoma Intl

1h 40mnonstop

7:00 am - 9:30 amSEA Seattle/Tacoma Intl-BOI Boise Air Term. Gowen Fld

1h 30mnonstop

$217Alaska Airlines

Sun, Dec 6 - Tue, Dec 15

5:56 pm - 6:44 pmBOI Boise Air Term. Gowen Fld-SEA Seattle/Tacoma Intl

1h 48mnonstop

4:05 pm - 6:38 pmSEA Seattle/Tacoma Intl-BOI Boise Air Term. Gowen Fld

1h 33mnonstop

$217Delta

Tue, Dec 22 - Sun, Dec 27

11:53 am - 12:50 pmBOI Boise Air Term. Gowen Fld-SEA Seattle/Tacoma Intl

1h 57mnonstop

9:19 pm - 11:51 pmSEA Seattle/Tacoma Intl-BOI Boise Air Term. Gowen Fld

1h 32mnonstop

$217Delta

Tue, Dec 1 - Thu, Dec 31

2:05 pm - 2:49 pmBOI Boise Air Term. Gowen Fld-SEA Seattle/Tacoma Intl

1h 44mnonstop

7:15 am - 9:44 amSEA Seattle/Tacoma Intl-BOI Boise Air Term. Gowen Fld

1h 29mnonstop

$217Alaska Airlines

Mon, Dec 7 - Wed, Dec 16

12:20 pm - 1:14 pmBOI Boise Air Term. Gowen Fld-SEA Seattle/Tacoma Intl

1h 54mnonstop

9:03 am - 11:40 amSEA Seattle/Tacoma Intl-BOI Boise Air Term. Gowen Fld

1h 37mnonstop

$217Delta

Sat, Dec 19 - Sun, Jan 10

4:59 pm - 5:42 pmBOI Boise Air Term. Gowen Fld-SEA Seattle/Tacoma Intl

1h 43mnonstop

7:59 pm - 10:22 pmSEA Seattle/Tacoma Intl-BOI Boise Air Term. Gowen Fld

1h 23mnonstop

$217Alaska Airlines

Sat, Jan 9 - Mon, Jan 11

3:39 pm - 8:30 pmBOI Boise Air Term. Gowen Fld-SEA Seattle/Tacoma Intl

5h 51m1 stop Portland

10:29 am - 7:49 pmSEA Seattle/Tacoma Intl-BOI Boise Air Term. Gowen Fld

8h 20m1 stop Las Vegas Harry Reid Intl

$223Multiple Airlines

Thu, Nov 19 - Mon, Nov 23

2:49 pm - 12:37 pmBOI Boise Air Term. Gowen Fld-SEA Seattle/Tacoma Intl

22h 48m1 stop Las Vegas Harry Reid Intl

9:53 pm - 7:00 pmSEA Seattle/Tacoma Intl-BOI Boise Air Term. Gowen Fld

20h 07m1 stop Las Vegas Harry Reid Intl

$225Frontier

Wed, Dec 9 - Wed, Dec 16

3:30 pm - 10:50 pmBOI Boise Air Term. Gowen Fld-SEA Seattle/Tacoma Intl

8h 20m1 stop Denver Intl

6:10 am - 3:10 pmSEA Seattle/Tacoma Intl-BOI Boise Air Term. Gowen Fld

8h 00m1 stop Denver Intl

$227Southwest

Recent last minute flight deals from Idaho to Seattle

Mon, Nov 2 - Tue, Nov 3

6:43 pm - 4:56 pmBOI Boise Air Term. Gowen Fld-SEA Seattle/Tacoma Intl

23h 13m1 stop San Diego

7:50 pm - 10:20 pmSEA Seattle/Tacoma Intl-BOI Boise Air Term. Gowen Fld

1h 30mnonstop

$287Alaska Airlines

Mon, Nov 2 - Tue, Nov 3

6:43 pm - 4:56 pmBOI Boise Air Term. Gowen Fld-SEA Seattle/Tacoma Intl

23h 13m1 stop San Diego

7:50 pm - 10:20 pmSEA Seattle/Tacoma Intl-BOI Boise Air Term. Gowen Fld

1h 30mnonstop

$347Alaska Airlines

Fri, Oct 30 - 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

$399Delta

Mon, Nov 2 - Tue, Nov 3

6:43 pm - 5:55 pmBOI Boise Air Term. Gowen Fld-SEA Seattle/Tacoma Intl

24h 12m1 stop San Diego

9:24 pm - 11:49 pmSEA Seattle/Tacoma Intl-BOI Boise Air Term. Gowen Fld

1h 25mnonstop

$407Alaska Airlines

Fri, Oct 30 - Thu, Nov 5

12:19 pm - 7:02 pmLWS Lewiston Nez Perce Rgnl-SEA Seattle/Tacoma Intl

6h 43m1 stop Salt Lake City

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

1h 21mnonstop

$408Delta

Fri, Oct 30 - Thu, Nov 5

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

4h 36m1 stop Salt Lake City

5:30 am - 11:39 amSEA Seattle/Tacoma Intl-LWS Lewiston Nez Perce Rgnl

6h 09m1 stop Salt Lake City

$418Delta

Mon, Nov 2 - Tue, Nov 3

8:30 pm - 1:15 amBOI Boise Air Term. Gowen Fld-SEA Seattle/Tacoma Intl

5h 45m1 stop Las Vegas Harry Reid Intl

5:40 am - 9:35 pmSEA Seattle/Tacoma Intl-BOI Boise Air Term. Gowen Fld

14h 55m1 stop Phoenix Sky Harbor Intl

$507Southwest

Tue, Nov 3 - Sat, Nov 7

12:40 pm - 7:40 pmBOI Boise Air Term. Gowen Fld-SEA Seattle/Tacoma Intl

8h 00m1 stop San Jose

8:35 am - 2:05 pmSEA Seattle/Tacoma Intl-BOI Boise Air Term. Gowen Fld

4h 30m1 stop Oakland

$547Southwest

Wed, Nov 4 - Wed, Nov 11

12:00 pm - 6:33 pmBOI Boise Air Term. Gowen Fld-SEA Seattle/Tacoma Intl

7h 33m1 stop San Francisco

10:40 am - 4:42 pmSEA Seattle/Tacoma Intl-BOI Boise Air Term. Gowen Fld

5h 02m1 stop San Francisco

$547United Airlines

Tue, Nov 3 - Sat, Nov 7

6:21 pm - 6:57 pmBOI Boise Air Term. Gowen Fld-SEA Seattle/Tacoma Intl

1h 36mnonstop

3:27 pm - 10:11 pmSEA Seattle/Tacoma Intl-BOI Boise Air Term. Gowen Fld

5h 44m1 stop Santa Ana J. Wayne/Orange Cnty

$572Alaska Airlines

Recent direct flight deals from Idaho to Seattle

Fri, Dec 18 - Wed, Dec 23

5:00 pm - 5:43 pmBOI Boise Air Term. Gowen Fld-SEA Seattle/Tacoma Intl

1h 43mnonstop

7:15 am - 9:44 amSEA Seattle/Tacoma Intl-BOI Boise Air Term. Gowen Fld

1h 29mnonstop

$217Alaska Airlines

Mon, Nov 23 - Tue, Dec 1

7:21 pm - 8:01 pmBOI Boise Air Term. Gowen Fld-SEA Seattle/Tacoma Intl

1h 40mnonstop

7:00 am - 9:30 amSEA Seattle/Tacoma Intl-BOI Boise Air Term. Gowen Fld

1h 30mnonstop

$217Alaska Airlines

Sun, Dec 6 - Tue, Dec 15

5:56 pm - 6:44 pmBOI Boise Air Term. Gowen Fld-SEA Seattle/Tacoma Intl

1h 48mnonstop

4:05 pm - 6:38 pmSEA Seattle/Tacoma Intl-BOI Boise Air Term. Gowen Fld

1h 33mnonstop

$217Delta

Tue, Dec 22 - Sun, Dec 27

11:53 am - 12:50 pmBOI Boise Air Term. Gowen Fld-SEA Seattle/Tacoma Intl

1h 57mnonstop

9:19 pm - 11:51 pmSEA Seattle/Tacoma Intl-BOI Boise Air Term. Gowen Fld

1h 32mnonstop

$217Delta

Tue, Dec 1 - Thu, Dec 31

2:05 pm - 2:49 pmBOI Boise Air Term. Gowen Fld-SEA Seattle/Tacoma Intl

1h 44mnonstop

7:15 am - 9:44 amSEA Seattle/Tacoma Intl-BOI Boise Air Term. Gowen Fld

1h 29mnonstop

$217Alaska Airlines

Sat, Dec 19 - Sun, Jan 10

4:59 pm - 5:42 pmBOI Boise Air Term. Gowen Fld-SEA Seattle/Tacoma Intl

1h 43mnonstop

7:59 pm - 10:22 pmSEA Seattle/Tacoma Intl-BOI Boise Air Term. Gowen Fld

1h 23mnonstop

$217Alaska Airlines

Sun, Dec 6 - Wed, Dec 16

6:00 pm - 6:50 pmBOI Boise Air Term. Gowen Fld-SEA Seattle/Tacoma Intl

1h 50mnonstop

5:40 pm - 8:05 pmSEA Seattle/Tacoma Intl-BOI Boise Air Term. Gowen Fld

1h 25mnonstop

$217Alaska Airlines

Wed, Dec 16 - Sun, Jan 10

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

1h 48mnonstop

9:23 pm - 11:46 pmSEA Seattle/Tacoma Intl-BOI Boise Air Term. Gowen Fld

1h 23mnonstop

$217Alaska Airlines

Wed, Jan 20 - Mon, Feb 1

12:48 pm - 1:26 pmBOI Boise Air Term. Gowen Fld-SEA Seattle/Tacoma Intl

1h 38mnonstop

9:23 pm - 11:46 pmSEA Seattle/Tacoma Intl-BOI Boise Air Term. Gowen Fld

1h 23mnonstop

$217Alaska Airlines

Mon, Jan 18 - Sat, Feb 6

12:48 pm - 1:26 pmBOI Boise Air Term. Gowen Fld-SEA Seattle/Tacoma Intl

1h 38mnonstop

7:59 pm - 10:22 pmSEA Seattle/Tacoma Intl-BOI Boise Air Term. Gowen Fld

1h 23mnonstop

$217Alaska Airlines

Useful Info

Low season	January
High season	July
Cheapest flight	$114

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

Most popular time to fly with an average 21% 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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$114 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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