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

Cheap flights from Idaho to Seattle with top airlines, updated regularly. Compare round-trip, one-way, direct and last-minute deals.

Round-trip

One-way

Last minute

Direct

Sat, Dec 12 - Sat, Dec 19

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

$209Delta

Thu, Feb 4 - Tue, Feb 9

7:00 pm - 7:49 pmBOI Boise Air Term. Gowen Fld-SEA Seattle/Tacoma Intl

1h 49mnonstop

3:54 pm - 6:20 pmSEA Seattle/Tacoma Intl-BOI Boise Air Term. Gowen Fld

1h 26mnonstop

$211Alaska Airlines

Sat, Dec 12 - Mon, Dec 14

8:59 am - 10:09 amBOI Boise Air Term. Gowen Fld-SEA Seattle/Tacoma Intl

2h 10mnonstop

1:30 pm - 4:04 pmSEA Seattle/Tacoma Intl-BOI Boise Air Term. Gowen Fld

1h 34mnonstop

$217Delta

Tue, Dec 15 - Sun, Jan 10

3:44 pm - 4:40 pmBOI Boise Air Term. Gowen Fld-SEA Seattle/Tacoma Intl

1h 56mnonstop

1:30 pm - 4:00 pmSEA Seattle/Tacoma Intl-BOI Boise Air Term. Gowen Fld

1h 30mnonstop

$217Delta

Tue, Dec 22 - Mon, Dec 28

1:12 pm - 1:51 pmBOI Boise Air Term. Gowen Fld-SEA Seattle/Tacoma Intl

1h 39mnonstop

7:50 pm - 10:18 pmSEA Seattle/Tacoma Intl-BOI Boise Air Term. Gowen Fld

1h 28mnonstop

$217Alaska Airlines

Sun, Dec 13 - Tue, Jan 5

4:10 pm - 4:54 pmBOI Boise Air Term. Gowen Fld-SEA Seattle/Tacoma Intl

1h 44mnonstop

8:00 am - 10:23 amSEA Seattle/Tacoma Intl-BOI Boise Air Term. Gowen Fld

1h 23mnonstop

$217Alaska Airlines

Mon, Dec 14 - Wed, Jan 6

6:35 am - 7:36 amBOI Boise Air Term. Gowen Fld-SEA Seattle/Tacoma Intl

2h 01mnonstop

5:45 pm - 8:17 pmSEA Seattle/Tacoma Intl-BOI Boise Air Term. Gowen Fld

1h 32mnonstop

$217Delta

Tue, Feb 2 - Tue, Feb 9

3:20 pm - 10:35 pmBOI Boise Air Term. Gowen Fld-SEA Seattle/Tacoma Intl

8h 15m1 stop Las Vegas Harry Reid Intl

4:50 pm - 11:05 pmSEA Seattle/Tacoma Intl-BOI Boise Air Term. Gowen Fld

5h 15m1 stop Denver Intl

$227Southwest

Sat, Dec 12 - Tue, Dec 15

4:35 pm - 8:10 pmBOI Boise Air Term. Gowen Fld-SEA Seattle/Tacoma Intl

4h 35m1 stop Sacramento Intl

5:15 am - 12:25 pmSEA Seattle/Tacoma Intl-BOI Boise Air Term. Gowen Fld

6h 10m1 stop Sacramento Intl

$227Southwest

Wed, Jan 13 - Tue, Jan 19

6:25 am - 12:10 pmBOI Boise Air Term. Gowen Fld-SEA Seattle/Tacoma Intl

6h 45m1 stop Sacramento Intl

4:50 pm - 11:05 pmSEA Seattle/Tacoma Intl-BOI Boise Air Term. Gowen Fld

5h 15m1 stop Denver Intl

$227Southwest

Thu, Oct 22 - Sun, Oct 25

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

$374Frontier

Thu, Oct 22 - Sun, Oct 25

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

$394Frontier

Mon, Oct 19 - Tue, Oct 20

3:57 pm - 8:55 amIDA Idaho Falls Fanning Field-SEA Seattle/Tacoma Intl

17h 58m2 stops Portland Los Angeles

12:30 pm - 3:20 pmSEA Seattle/Tacoma Intl-IDA Idaho Falls Fanning Field

1h 50mnonstop

$411Alaska Airlines

Mon, Oct 19 - Mon, Oct 19

7:20 am - 12:28 pmBOI Boise Air Term. Gowen Fld-SEA Seattle/Tacoma Intl

6h 08m1 stop San Diego

3:51 pm - 6:17 pmSEA Seattle/Tacoma Intl-BOI Boise Air Term. Gowen Fld

1h 26mnonstop

$457Alaska Airlines

Fri, Oct 23 - Sat, Oct 24

7:37 pm - 9:28 amBOI Boise Air Term. Gowen Fld-SEA Seattle/Tacoma Intl

14h 51m1 stop San Diego

11:33 am - 2:11 pmSEA Seattle/Tacoma Intl-BOI Boise Air Term. Gowen Fld

1h 38mnonstop

$463Alaska Airlines

Thu, Oct 22 - Mon, Oct 26

8:59 am - 9:54 amBOI Boise Air Term. Gowen Fld-SEA Seattle/Tacoma Intl

1h 55mnonstop

12:47 pm - 3:20 pmSEA Seattle/Tacoma Intl-BOI Boise Air Term. Gowen Fld

1h 33mnonstop

$507Delta

Fri, Oct 23 - Mon, Oct 26

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

1h 42mnonstop

7:35 pm - 10:08 pmSEA Seattle/Tacoma Intl-BOI Boise Air Term. Gowen Fld

1h 33mnonstop

$507Delta

Tue, Oct 20 - Mon, Nov 2

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

1h 54mnonstop

7:35 pm - 10:08 pmSEA Seattle/Tacoma Intl-BOI Boise Air Term. Gowen Fld

1h 33mnonstop

$517Delta

Thu, Oct 22 - Mon, Oct 26

3:50 pm - 8:35 pmBOI Boise Air Term. Gowen Fld-SEA Seattle/Tacoma Intl

5h 45m1 stop Denver Intl

6:50 pm - 1:45 amSEA Seattle/Tacoma Intl-BOI Boise Air Term. Gowen Fld

5h 55m1 stop Phoenix Sky Harbor Intl

$527Southwest

Fri, Oct 23 - Mon, Oct 26

5:40 am - 10:55 amBOI Boise Air Term. Gowen Fld-SEA Seattle/Tacoma Intl

6h 15m1 stop Phoenix Sky Harbor Intl

3:55 pm - 12:10 amSEA Seattle/Tacoma Intl-BOI Boise Air Term. Gowen Fld

7h 15m1 stop Sacramento Intl

$527Southwest

Sat, Dec 12 - Sat, Dec 19

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

$209Delta

Thu, Feb 4 - Tue, Feb 9

7:00 pm - 7:49 pmBOI Boise Air Term. Gowen Fld-SEA Seattle/Tacoma Intl

1h 49mnonstop

3:54 pm - 6:20 pmSEA Seattle/Tacoma Intl-BOI Boise Air Term. Gowen Fld

1h 26mnonstop

$211Alaska Airlines

Tue, Dec 15 - Sun, Jan 10

3:44 pm - 4:40 pmBOI Boise Air Term. Gowen Fld-SEA Seattle/Tacoma Intl

1h 56mnonstop

1:30 pm - 4:00 pmSEA Seattle/Tacoma Intl-BOI Boise Air Term. Gowen Fld

1h 30mnonstop

$217Delta

Sun, Dec 13 - Tue, Jan 5

4:10 pm - 4:54 pmBOI Boise Air Term. Gowen Fld-SEA Seattle/Tacoma Intl

1h 44mnonstop

8:00 am - 10:23 amSEA Seattle/Tacoma Intl-BOI Boise Air Term. Gowen Fld

1h 23mnonstop

$217Alaska Airlines

Mon, Dec 14 - Wed, Jan 6

6:35 am - 7:36 amBOI Boise Air Term. Gowen Fld-SEA Seattle/Tacoma Intl

2h 01mnonstop

5:45 pm - 8:17 pmSEA Seattle/Tacoma Intl-BOI Boise Air Term. Gowen Fld

1h 32mnonstop

$217Delta

Fri, Dec 18 - Wed, Dec 23

6:31 am - 7:20 amBOI Boise Air Term. Gowen Fld-SEA Seattle/Tacoma Intl

1h 49mnonstop

9:30 pm - 11:59 pmSEA Seattle/Tacoma Intl-BOI Boise Air Term. Gowen Fld

1h 29mnonstop

$217Alaska Airlines

Tue, Nov 24 - Thu, Dec 3

2:00 pm - 2:40 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, Nov 22 - Sat, Nov 28

1:02 pm - 1:49 pmBOI Boise Air Term. Gowen Fld-SEA Seattle/Tacoma Intl

1h 47mnonstop

11:01 pm - 1:28 amSEA Seattle/Tacoma Intl-BOI Boise Air Term. Gowen Fld

1h 27mnonstop

$217Alaska Airlines

Thu, Jan 7 - Sat, Jan 9

9:57 am - 10:38 amBOI Boise Air Term. Gowen Fld-SEA Seattle/Tacoma Intl

1h 41mnonstop

8:00 am - 10:23 amSEA Seattle/Tacoma Intl-BOI Boise Air Term. Gowen Fld

1h 23mnonstop

$217Alaska Airlines

Wed, Dec 30 - Mon, Jan 4

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

1h 43mnonstop

7:50 pm - 10:18 pmSEA Seattle/Tacoma Intl-BOI Boise Air Term. Gowen Fld

1h 28mnonstop

$217Alaska Airlines

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 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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SEA

$114 Find Cheap Flights from Idaho to Seattle - Compare and Save

Cheap Flights from Idaho to Seattle

Cheap flights from Idaho to Seattle with top airlines, updated regularly. Compare round-trip, one-way, direct and last-minute deals.

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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?

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

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