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, Jan 8 - Sun, Jan 10

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

$209Delta

Sat, Jan 9 - Sun, Jan 10

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

$209Delta

Sun, Nov 15 - Sun, Nov 22

9:08 am - 10:47 amLWS Lewiston Nez Perce Rgnl-SEA Seattle/Tacoma Intl

1h 39mnonstop

9:45 pm - 11:03 pmSEA Seattle/Tacoma Intl-LWS Lewiston Nez Perce Rgnl

1h 18mnonstop

$209Delta

Sun, Feb 7 - Sat, Feb 20

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

$209Delta

Fri, Oct 30 - Tue, Nov 3

8:22 pm - 8:57 pmBOI Boise Air Term. Gowen Fld-SEA Seattle/Tacoma Intl

1h 35mnonstop

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

1h 25mnonstop

$217Alaska Airlines

Thu, Nov 5 - Tue, Nov 10

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

1h 38mnonstop

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

1h 25mnonstop

$217Alaska Airlines

Thu, Jan 28 - Sat, Jan 30

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

1h 49mnonstop

5:55 pm - 8:17 pmSEA Seattle/Tacoma Intl-BOI Boise Air Term. Gowen Fld

1h 22mnonstop

$217Alaska Airlines

Wed, Dec 2 - Sat, Dec 5

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

$227Southwest

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

Sat, Oct 31 - Tue, Nov 3

12:00 pm - 4:27 pmBOI Boise Air Term. Gowen Fld-SEA Seattle/Tacoma Intl

5h 27m1 stop San Francisco

3:35 pm - 11:33 pmSEA Seattle/Tacoma Intl-BOI Boise Air Term. Gowen Fld

6h 58m1 stop San Francisco

$227United Airlines

Recent last minute flight deals from Idaho to Seattle

Thu, Oct 8 - Thu, Oct 15

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

$354Frontier

Mon, Oct 5 - Thu, Oct 8

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

19h 52m1 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 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

$374Frontier

Sun, Oct 4 - Thu, Oct 15

2:50 pm - 6:28 pmBOI Boise Air Term. Gowen Fld-SEA Seattle/Tacoma Intl

28h 38m1 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

$380Frontier

Thu, Oct 8 - Fri, Oct 9

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

14h 51m1 stop San Diego

12:48 pm - 3:23 pmSEA Seattle/Tacoma Intl-BOI Boise Air Term. Gowen Fld

1h 35mnonstop

$463Alaska Airlines

Thu, Oct 8 - Fri, Oct 9

10:12 am - 9:48 amBOI Boise Air Term. Gowen Fld-SEA Seattle/Tacoma Intl

24h 36m1 stop Hollywood Burbank

12:48 pm - 3:23 pmSEA Seattle/Tacoma Intl-BOI Boise Air Term. Gowen Fld

1h 35mnonstop

$477Alaska Airlines

Sat, Oct 3 - Tue, Nov 3

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

1h 37mnonstop

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

1h 30mnonstop

$502Alaska Airlines

Thu, Oct 8 - Thu, Oct 15

7:13 pm - 8:10 pmBOI Boise Air Term. Gowen Fld-SEA Seattle/Tacoma Intl

1h 57mnonstop

2:45 pm - 5:14 pmSEA Seattle/Tacoma Intl-BOI Boise Air Term. Gowen Fld

1h 29mnonstop

$507Delta

Thu, Oct 8 - Sun, Oct 11

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

1h 57mnonstop

2:45 pm - 5:14 pmSEA Seattle/Tacoma Intl-BOI Boise Air Term. Gowen Fld

1h 29mnonstop

$507Delta

Thu, Oct 8 - Mon, Oct 12

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

1h 54mnonstop

2:45 pm - 5:14 pmSEA Seattle/Tacoma Intl-BOI Boise Air Term. Gowen Fld

1h 29mnonstop

$527Delta

Recent direct flight deals from Idaho to Seattle

Wed, Feb 10 - Thu, Feb 25

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

$209Delta

Wed, Jan 6 - Sun, Jan 10

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

$209Delta

Thu, Jan 7 - Sun, Jan 10

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

$209Delta

Sun, Feb 7 - Sat, Feb 20

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

$209Delta

Sun, Nov 15 - Sun, Nov 22

9:08 am - 10:47 amLWS Lewiston Nez Perce Rgnl-SEA Seattle/Tacoma Intl

1h 39mnonstop

9:45 pm - 11:03 pmSEA Seattle/Tacoma Intl-LWS Lewiston Nez Perce Rgnl

1h 18mnonstop

$209Delta

Sat, Jan 9 - Sun, Jan 10

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

$209Delta

Fri, Jan 8 - Sun, Jan 10

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

$209Delta

Sun, Feb 14 - Sat, Feb 20

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

$209Delta

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

Sat, Nov 7 - Mon, Nov 9

4:16 pm - 4:57 pmBOI Boise Air Term. Gowen Fld-SEA Seattle/Tacoma Intl

1h 41mnonstop

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

1h 29mnonstop

$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 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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$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

FAQs for booking flights from Idaho to Seattle

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

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