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.

$86 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 13 - Tue, Nov 3

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

$189Delta

Wed, Oct 14 - 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

$189Delta

Sat, Oct 17 - Wed, Nov 4

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

$189Delta

Sun, Nov 8 - Mon, Nov 9

6:43 pm - 9:28 amBOI Boise Air Term. Gowen Fld-SEA Seattle/Tacoma Intl

15h 45m1 stop San Diego

1:03 pm - 3:27 pmSEA Seattle/Tacoma Intl-BOI Boise Air Term. Gowen Fld

1h 24mnonstop

$192Alaska Airlines

Tue, Nov 3 - Wed, Nov 4

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

$192Alaska Airlines

Sun, Nov 8 - Mon, Nov 9

6:43 pm - 9:28 amBOI Boise Air Term. Gowen Fld-SEA Seattle/Tacoma Intl

15h 45m1 stop San Diego

1:03 pm - 3:27 pmSEA Seattle/Tacoma Intl-BOI Boise Air Term. Gowen Fld

1h 24mnonstop

$192Alaska Airlines

Mon, Sep 14 - Wed, Sep 16

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

$225Frontier

Tue, Oct 20 - Sat, Oct 24

6:00 am - 11:25 amBOI Boise Air Term. Gowen Fld-SEA Seattle/Tacoma Intl

6h 25m1 stop Phoenix Sky Harbor Intl

2:05 pm - 9:35 pmSEA Seattle/Tacoma Intl-BOI Boise Air Term. Gowen Fld

6h 30m1 stop San Diego

$227Southwest

Sat, Oct 24 - Wed, Oct 28

2:35 pm - 9:03 pmBOI Boise Air Term. Gowen Fld-SEA Seattle/Tacoma Intl

7h 28m1 stop San Francisco

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

5h 02m1 stop San Francisco

$227United Airlines

Wed, Dec 2 - Sat, Dec 5

3:30 pm - 8:48 pmJAC Jackson Hole-SEA Seattle/Tacoma Intl

6h 18m1 stop San Francisco

5:00 am - 1:57 pmSEA Seattle/Tacoma Intl-JAC Jackson Hole

7h 57m1 stop San Francisco

$297United Airlines

Recent last minute flight deals from Idaho to Seattle

Sat, Aug 22 - Sat, Aug 29

7:03 am - 8:20 amGEG Spokane-SEA Seattle/Tacoma Intl

1h 17mnonstop

11:24 am - 12:31 pmSEA Seattle/Tacoma Intl-GEG Spokane

1h 07mnonstop

$274Alaska Airlines

Sun, Aug 23 - Wed, Aug 26

12:24 pm - 9:19 amBOI Boise Air Term. Gowen Fld-SEA Seattle/Tacoma Intl

21h 55m1 stop Denver Intl

2:37 pm - 11:29 amSEA Seattle/Tacoma Intl-BOI Boise Air Term. Gowen Fld

19h 52m1 stop Denver Intl

$340Frontier

Mon, Aug 24 - Mon, Aug 24

7:03 am - 7:52 pmGEG Spokane-SEA Seattle/Tacoma Intl

12h 49m1 stop San Diego

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

1h 04mnonstop

$349Alaska Airlines

Sun, Aug 23 - Sat, Sep 19

5:59 pm - 6:37 pmBOI Boise Air Term. Gowen Fld-SEA Seattle/Tacoma Intl

1h 38mnonstop

2:45 pm - 5:19 pmSEA Seattle/Tacoma Intl-BOI Boise Air Term. Gowen Fld

1h 34mnonstop

$352Delta

Sun, Aug 23 - Mon, Aug 24

12:24 pm - 12:20 pmBOI Boise Air Term. Gowen Fld-SEA Seattle/Tacoma Intl

24h 56m1 stop Denver Intl

7:06 pm - 12:29 pmSEA Seattle/Tacoma Intl-BOI Boise Air Term. Gowen Fld

16h 23m1 stop Denver Intl

$360Frontier

Sun, Aug 23 - Sat, Sep 19

3:20 pm - 9:45 pmBOI Boise Air Term. Gowen Fld-SEA Seattle/Tacoma Intl

7h 25m1 stop Denver Intl

5:30 am - 12:15 pmSEA Seattle/Tacoma Intl-BOI Boise Air Term. Gowen Fld

5h 45m1 stop Las Vegas Harry Reid Intl

$372Southwest

Sat, Aug 22 - Sat, Aug 22

9:41 am - 10:53 amGEG Spokane-SEA Seattle/Tacoma Intl

1h 12mnonstop

2:18 pm - 10:49 pmSEA Seattle/Tacoma Intl-GEG Spokane

8h 31m1 stop San Diego

$383Alaska Airlines

Sat, Aug 22 - Sun, Sep 6

5:15 am - 6:30 amGEG Spokane-SEA Seattle/Tacoma Intl

1h 15mnonstop

9:15 am - 10:29 amSEA Seattle/Tacoma Intl-GEG Spokane

1h 14mnonstop

$402Delta

Sat, Aug 22 - Tue, Aug 25

10:40 am - 5:42 pmJAC Jackson Hole-SEA Seattle/Tacoma Intl

8h 02m1 stop Denver Intl

6:30 am - 1:55 pmSEA Seattle/Tacoma Intl-JAC Jackson Hole

6h 25m1 stop Los Angeles

$621United Airlines

Fri, Aug 21 - Mon, Aug 24

4:25 pm - 11:04 pmJAC Jackson Hole-SEA Seattle/Tacoma Intl

7h 39m1 stop Denver Intl

7:11 am - 4:39 pmSEA Seattle/Tacoma Intl-JAC Jackson Hole

8h 28m1 stop San Francisco

$646United Airlines

Recent direct flight deals from Idaho to Seattle

Tue, Oct 13 - Tue, Nov 3

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

$189Delta

Wed, Oct 14 - 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

$189Delta

Thu, Oct 15 - 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

$189Delta

Tue, Oct 13 - Sun, Nov 1

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

$189Delta

Sat, Oct 17 - Sun, Nov 1

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

$189Delta

Sat, Oct 17 - Wed, Nov 4

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

$189Delta

Fri, Oct 16 - Sun, Nov 1

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

$189Delta

Tue, Oct 13 - 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

$189Delta

Wed, Sep 23 - Sat, Oct 3

4:20 pm - 4:56 pmBOI Boise Air Term. Gowen Fld-SEA Seattle/Tacoma Intl

1h 36mnonstop

7:17 am - 9:56 amSEA Seattle/Tacoma Intl-BOI Boise Air Term. Gowen Fld

1h 39mnonstop

$207Alaska Airlines

Tue, Sep 22 - Tue, Sep 29

6:23 am - 7:02 amBOI Boise Air Term. Gowen Fld-SEA Seattle/Tacoma Intl

1h 39mnonstop

11:43 am - 2:22 pmSEA Seattle/Tacoma Intl-BOI Boise Air Term. Gowen Fld

1h 39mnonstop

$207Alaska Airlines

Useful Info

Low season	January
High season	July
Cheapest flight	$86

Best time to beat the crowds with an average 23% drop in price.

Most popular time to fly with an average 25% increase in price.

Flight from Boise to Seattle

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

Everything you need to know for your flight to Seattle

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Seattle (SEA)

SEA

$86 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

Good to know

Low season

High season

Cheapest flight

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?

Everything you need to know for your flight to Seattle

Information on the airport you'll fly into in Seattle

Cabin class types available on flights to Idaho

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

Find direct flights for Seattle

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Flights from domestic origins to Seattle

Choose which airport to fly into in Seattle

Find deals for your return flight