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.

$100 CHEAP FLIGHTS from Idaho to Seattle

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Flight Deals

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, Oct 27 - Tue, Oct 27

7:19 am - 8:26 pmGEG Spokane-SEA Seattle/Tacoma Intl

13h 07m1 stop San Diego

10:52 pm - 11:55 pmSEA Seattle/Tacoma Intl-GEG Spokane

1h 03mnonstop

$201Alaska Airlines

Sat, Oct 17 - Sat, Oct 17

12:58 pm - 1:32 pmBOI Boise Air Term. Gowen Fld-SEA Seattle/Tacoma Intl

1h 34mnonstop

3:33 pm - 10:01 pmSEA Seattle/Tacoma Intl-BOI Boise Air Term. Gowen Fld

5h 28m1 stop Las Vegas Harry Reid Intl

$208Alaska Airlines

Wed, Jan 13 - Wed, Jan 27

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, Oct 20 - Sat, Oct 24

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

$209Delta

Tue, Oct 20 - Sun, Oct 25

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

$209Delta

Tue, Oct 6 - Tue, Oct 6

7:00 am - 10:29 amBOI Boise Air Term. Gowen Fld-SEA Seattle/Tacoma Intl

4h 29m1 stop Sacramento Intl

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

1h 35mnonstop

$211Alaska Airlines

Tue, Oct 20 - Sat, Oct 24

3:20 pm - 10:40 pmBOI Boise Air Term. Gowen Fld-SEA Seattle/Tacoma Intl

8h 20m1 stop Denver Intl

2:05 pm - 9:40 pmSEA Seattle/Tacoma Intl-BOI Boise Air Term. Gowen Fld

6h 35m1 stop San Diego

$247Southwest

Sat, Oct 17 - Tue, Oct 20

11:10 am - 6:10 pmBOI Boise Air Term. Gowen Fld-SEA Seattle/Tacoma Intl

8h 00m1 stop San Jose

3:30 pm - 10:20 pmSEA Seattle/Tacoma Intl-BOI Boise Air Term. Gowen Fld

5h 50m1 stop Denver Intl

$247Southwest

Sat, Oct 17 - Sat, Oct 24

4:28 pm - 9:15 pmJAC Jackson Hole-SEA Seattle/Tacoma Intl

5h 47m1 stop Denver Intl

10:44 am - 5:27 pmSEA Seattle/Tacoma Intl-JAC Jackson Hole

5h 43m1 stop San Francisco

$297United Airlines

Sat, Oct 31 - Wed, Nov 4

4:10 pm - 9:19 pmJAC Jackson Hole-SEA Seattle/Tacoma Intl

6h 09m1 stop Denver Intl

5:05 am - 1:25 pmSEA Seattle/Tacoma Intl-JAC Jackson Hole

7h 20m1 stop Denver Intl

$297United Airlines

Recent last minute flight deals from Idaho to Seattle

Tue, Sep 22 - Tue, Sep 22

1:36 pm - 2:50 pmGEG Spokane-SEA Seattle/Tacoma Intl

1h 14mnonstop

4:59 pm - 11:53 pmSEA Seattle/Tacoma Intl-GEG Spokane

6h 54m1 stop San Diego

$344Alaska Airlines

Wed, Sep 23 - Wed, Sep 23

1:36 pm - 2:50 pmGEG Spokane-SEA Seattle/Tacoma Intl

1h 14mnonstop

4:59 pm - 11:53 pmSEA Seattle/Tacoma Intl-GEG Spokane

6h 54m1 stop San Diego

$344Alaska Airlines

Fri, Sep 25 - Mon, Sep 28

9:16 am - 10:45 amLWS Lewiston Nez Perce Rgnl-SEA Seattle/Tacoma Intl

1h 29mnonstop

9:45 pm - 11:08 pmSEA Seattle/Tacoma Intl-LWS Lewiston Nez Perce Rgnl

1h 23mnonstop

$349Delta

Thu, Sep 24 - Mon, Sep 28

9:16 am - 10:45 amLWS Lewiston Nez Perce Rgnl-SEA Seattle/Tacoma Intl

1h 29mnonstop

9:45 pm - 11:08 pmSEA Seattle/Tacoma Intl-LWS Lewiston Nez Perce Rgnl

1h 23mnonstop

$349Delta

Mon, Sep 21 - Mon, Sep 21

6:00 am - 7:52 pmGEG Spokane-SEA Seattle/Tacoma Intl

13h 52m1 stop San Diego

10:55 pm - 11:59 pmSEA Seattle/Tacoma Intl-GEG Spokane

1h 04mnonstop

$349Alaska Airlines

Fri, Sep 25 - Sun, Sep 27

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

19h 52m1 stop Las Vegas Harry Reid Intl

9:45 pm - 1:55 pmSEA Seattle/Tacoma Intl-BOI Boise Air Term. Gowen Fld

15h 10m1 stop Las Vegas Harry Reid Intl

$374Frontier

Thu, Sep 24 - Sun, Sep 27

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

28h 38m1 stop Las Vegas Harry Reid Intl

9:45 pm - 1:55 pmSEA Seattle/Tacoma Intl-BOI Boise Air Term. Gowen Fld

15h 10m1 stop Las Vegas Harry Reid Intl

$388Frontier

Thu, Sep 24 - Mon, Sep 28

12:14 pm - 4:50 pmLWS Lewiston Nez Perce Rgnl-SEA Seattle/Tacoma Intl

4h 36m1 stop Salt Lake City

9:45 pm - 11:08 pmSEA Seattle/Tacoma Intl-LWS Lewiston Nez Perce Rgnl

1h 23mnonstop

$429Delta

Thu, Sep 24 - Sun, Sep 27

4:28 pm - 9:15 pmJAC Jackson Hole-SEA Seattle/Tacoma Intl

5h 47m1 stop Denver Intl

9:05 am - 5:27 pmSEA Seattle/Tacoma Intl-JAC Jackson Hole

7h 22m1 stop San Francisco

$553United Airlines

Thu, Sep 24 - Sun, Sep 27

4:28 pm - 9:15 pmJAC Jackson Hole-SEA Seattle/Tacoma Intl

5h 47m1 stop Denver Intl

9:05 am - 5:27 pmSEA Seattle/Tacoma Intl-JAC Jackson Hole

7h 22m1 stop San Francisco

$600United Airlines

Recent direct flight deals from Idaho to Seattle

Wed, Jan 13 - Wed, Jan 27

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, Oct 20 - Sat, Oct 24

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

$209Delta

Tue, Oct 20 - Sun, Oct 25

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

$209Delta

Tue, Jan 12 - Wed, Jan 27

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, Oct 31 - Sat, Nov 7

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

1h 35mnonstop

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

1h 30mnonstop

$223Alaska Airlines

Wed, Jan 6 - Sat, Jan 9

8:12 am - 9:08 amBOI Boise Air Term. Gowen Fld-SEA Seattle/Tacoma Intl

1h 56mnonstop

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

1h 23mnonstop

$225Alaska Airlines

Tue, Nov 3 - Sat, Nov 7

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

$227Delta

Sat, Oct 17 - Tue, Oct 20

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

1h 55mnonstop

7:15 am - 9:54 amSEA Seattle/Tacoma Intl-BOI Boise Air Term. Gowen Fld

1h 39mnonstop

$227Delta

Tue, Dec 1 - Sat, Dec 5

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

2h 10mnonstop

7:50 pm - 10:24 pmSEA Seattle/Tacoma Intl-BOI Boise Air Term. Gowen Fld

1h 34mnonstop

$227Delta

Wed, Nov 11 - Sat, Nov 14

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

1h 38mnonstop

1:00 pm - 3:24 pmSEA Seattle/Tacoma Intl-BOI Boise Air Term. Gowen Fld

1h 24mnonstop

$227Alaska Airlines

Useful Info

Low season	January
High season	July
Cheapest flight	$100

Best time to beat the crowds with an average 25% drop in price.

Most popular time to fly with an average 24% 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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$100 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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Complete your trip to Seattle with a hotel stay or car rental

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