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.

$91 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

Sat, Sep 19 - Sat, Sep 19

5:52 am - 7:09 amGEG Spokane-SEA Seattle/Tacoma Intl

1h 17mnonstop

9:53 am - 4:20 pmSEA Seattle/Tacoma Intl-GEG Spokane

6h 27m2 stops Sacramento Intl Boise Air Term. Gowen Fld

$111Alaska Airlines

Sat, Aug 29 - Sat, Aug 29

5:52 am - 7:09 amGEG Spokane-SEA Seattle/Tacoma Intl

1h 17mnonstop

10:04 am - 11:11 pmSEA Seattle/Tacoma Intl-GEG Spokane

13h 07m2 stops Sacramento Intl Portland

$117Alaska Airlines

Wed, Sep 9 - Thu, Sep 10

6:49 pm - 6:52 pmBOI Boise Air Term. Gowen Fld-SEA Seattle/Tacoma Intl

25h 03m1 stop San Diego

9:18 pm - 11:44 pmSEA Seattle/Tacoma Intl-BOI Boise Air Term. Gowen Fld

1h 26mnonstop

$187Alaska Airlines

Wed, Oct 14 - Fri, Oct 23

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 - Fri, Oct 23

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

Mon, Oct 19 - Mon, Oct 26

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

Mon, Sep 21 - Wed, Sep 30

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

$203Frontier

Tue, Sep 8 - Tue, Sep 15

1:24 pm - 3:08 pmBOI Boise Air Term. Gowen Fld-SEA Seattle/Tacoma Intl

26h 44m1 stop Denver Intl

8:15 pm - 1:55 pmSEA Seattle/Tacoma Intl-BOI Boise Air Term. Gowen Fld

40h 40m2 stops Los Angeles Las Vegas Harry Reid Intl

$214Frontier

Wed, Oct 14 - Wed, Oct 21

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

5h 47m1 stop Denver Intl

8:30 am - 5:49 pmSEA Seattle/Tacoma Intl-JAC Jackson Hole

8h 19m1 stop Denver Intl

$277United Airlines

Wed, Oct 14 - Sat, Oct 24

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

$277United Airlines

Recent last minute flight deals from Idaho to Seattle

Sun, Aug 9 - Thu, Sep 10

1:24 pm - 9:04 amBOI Boise Air Term. Gowen Fld-SEA Seattle/Tacoma Intl

20h 40m1 stop Denver Intl

10:53 am - 1:55 pmSEA Seattle/Tacoma Intl-BOI Boise Air Term. Gowen Fld

26h 02m2 stops Ontario Las Vegas Harry Reid Intl

$319Frontier

Sun, Aug 9 - Thu, Sep 10

1:24 pm - 9:04 amBOI Boise Air Term. Gowen Fld-SEA Seattle/Tacoma Intl

20h 40m1 stop Denver Intl

9:55 am - 12:35 pmSEA Seattle/Tacoma Intl-BOI Boise Air Term. Gowen Fld

1h 40mnonstop

$328Multiple Airlines

Tue, Aug 11 - Thu, Aug 13

1:24 pm - 9:04 amBOI Boise Air Term. Gowen Fld-SEA Seattle/Tacoma Intl

20h 40m1 stop Denver Intl

7:04 am - 9:37 amSEA Seattle/Tacoma Intl-BOI Boise Air Term. Gowen Fld

1h 33mnonstop

$334Multiple Airlines

Fri, Aug 7 - Mon, Aug 10

9:23 am - 10:53 amLWS Lewiston Nez Perce Rgnl-SEA Seattle/Tacoma Intl

1h 30mnonstop

9:35 pm - 10:59 pmSEA Seattle/Tacoma Intl-LWS Lewiston Nez Perce Rgnl

1h 24mnonstop

$359Delta

Fri, Aug 7 - Mon, Aug 10

12:23 pm - 4:54 pmLWS Lewiston Nez Perce Rgnl-SEA Seattle/Tacoma Intl

4h 31m1 stop Salt Lake City

9:35 pm - 10:59 pmSEA Seattle/Tacoma Intl-LWS Lewiston Nez Perce Rgnl

1h 24mnonstop

$368Delta

Sat, Aug 8 - Sat, Aug 8

8:15 am - 8:35 pmGEG Spokane-SEA Seattle/Tacoma Intl

12h 20m1 stop San Diego

10:54 pm - 11:59 pmSEA Seattle/Tacoma Intl-GEG Spokane

1h 05mnonstop

$379Alaska Airlines

Sun, Aug 9 - Thu, Sep 10

12:23 pm - 1:12 pmBOI Boise Air Term. Gowen Fld-SEA Seattle/Tacoma Intl

1h 49mnonstop

12:39 pm - 3:16 pmSEA Seattle/Tacoma Intl-BOI Boise Air Term. Gowen Fld

1h 37mnonstop

$397Delta

Fri, Aug 7 - Wed, Sep 9

6:13 am - 7:24 amGEG Spokane-SEA Seattle/Tacoma Intl

1h 11mnonstop

7:08 am - 11:48 amSEA Seattle/Tacoma Intl-GEG Spokane

4h 40m1 stop Portland

$432Alaska Airlines

Fri, Aug 7 - Tue, Aug 11

8:00 am - 2:30 pmJAC Jackson Hole-SEA Seattle/Tacoma Intl

7h 30m1 stop San Francisco

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

8h 28m1 stop San Francisco

$626United Airlines

Fri, Aug 7 - Mon, Aug 10

8:00 am - 2:30 pmJAC Jackson Hole-SEA Seattle/Tacoma Intl

7h 30m1 stop San Francisco

11:02 am - 5:53 pmSEA Seattle/Tacoma Intl-JAC Jackson Hole

5h 51m1 stop Denver Intl

$671United Airlines

Recent direct flight deals from Idaho to Seattle

Mon, Oct 19 - Mon, Oct 26

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 - Fri, Oct 23

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 - Fri, Oct 23

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, Oct 26

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, Oct 18 - Mon, Oct 26

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, Jan 29 - Mon, Feb 1

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

$189Delta

Tue, Nov 24 - Sat, Nov 28

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

$189Delta

Sat, Oct 17 - 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

$189Delta

Sat, Sep 12 - Sat, Sep 19

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

1h 39mnonstop

9:55 am - 12:35 pmSEA Seattle/Tacoma Intl-BOI Boise Air Term. Gowen Fld

1h 40mnonstop

$191Alaska Airlines

Wed, Sep 16 - Wed, Sep 23

1:15 pm - 1:49 pmBOI Boise Air Term. Gowen Fld-SEA Seattle/Tacoma Intl

1h 34mnonstop

7:15 am - 9:56 amSEA Seattle/Tacoma Intl-BOI Boise Air Term. Gowen Fld

1h 41mnonstop

$193Alaska Airlines

Useful Info

Low season	January
High season	July
Cheapest flight	$91

Best time to beat the crowds with an average 22% drop in price.

Most popular time to fly with an average 26% 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

Mukilteo

Lacey

Woodinville

Poulsbo

Edmonds

Aberdeen

Shoreline

DuPont

Monroe

Castle Rock

Edgewood

Everything you need to know for your flight to Seattle

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Seattle (SEA)

SEA

$91 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

Flights to other popular destinations

Flights from domestic origins to Seattle

Choose which airport to fly into in Seattle

Find deals for your return flight