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.

$76 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, Oct 10 - Fri, Oct 16

4:41 pm - 5:55 pmGEG Spokane-SEA Seattle/Tacoma Intl

1h 14mnonstop

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

1h 03mnonstop

$117Alaska Airlines

Sat, Oct 10 - Sun, Oct 11

4:41 pm - 5:55 pmGEG Spokane-SEA Seattle/Tacoma Intl

1h 14mnonstop

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

1h 03mnonstop

$117Alaska Airlines

Fri, Oct 23 - Mon, Nov 2

5:38 pm - 7:05 pmGEG Spokane-SEA Seattle/Tacoma Intl

1h 27mnonstop

7:15 am - 8:40 amSEA Seattle/Tacoma Intl-GEG Spokane

1h 25mnonstop

$117Delta

Sat, Oct 24 - Mon, Oct 26

1:00 pm - 2:27 pmGEG Spokane-SEA Seattle/Tacoma Intl

1h 27mnonstop

9:22 am - 10:38 amSEA Seattle/Tacoma Intl-GEG Spokane

1h 16mnonstop

$117Delta

Sat, Dec 12 - Sat, Jan 9

7:00 am - 8:16 amGEG Spokane-SEA Seattle/Tacoma Intl

1h 16mnonstop

10:53 pm - 11:57 pmSEA Seattle/Tacoma Intl-GEG Spokane

1h 04mnonstop

$117Alaska Airlines

Sat, Oct 10 - Sat, Oct 17

5:10 am - 6:32 amGEG Spokane-SEA Seattle/Tacoma Intl

1h 22mnonstop

7:15 am - 8:40 amSEA Seattle/Tacoma Intl-GEG Spokane

1h 25mnonstop

$117Delta

Thu, Oct 1 - Sun, Oct 4

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

19h 52m1 stop Las Vegas Harry Reid Intl

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

1h 39mnonstop

$182Multiple Airlines

Thu, Oct 1 - Tue, Oct 6

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

19h 52m1 stop Las Vegas Harry Reid Intl

9:29 pm - 11:59 pmSEA Seattle/Tacoma Intl-BOI Boise Air Term. Gowen Fld

1h 30mnonstop

$184Multiple Airlines

Sat, Oct 17 - Tue, Oct 20

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

5h 47m1 stop Denver Intl

5:00 am - 12:44 pmSEA Seattle/Tacoma Intl-JAC Jackson Hole

6h 44m1 stop Denver Intl

$297United Airlines

Thu, Oct 29 - 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

$307United Airlines

Recent last minute flight deals from Idaho to Seattle

Thu, Sep 17 - Thu, Sep 24

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

$290Frontier

Fri, Sep 18 - Sun, Sep 20

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

$310Frontier

Wed, Sep 16 - Thu, Oct 1

11:10 am - 12:35 pmGEG Spokane-SEA Seattle/Tacoma Intl

1h 25mnonstop

10:47 pm - 11:59 pmSEA Seattle/Tacoma Intl-GEG Spokane

1h 12mnonstop

$322Delta

Wed, Sep 16 - Fri, Oct 2

3:59 pm - 5:28 pmGEG Spokane-SEA Seattle/Tacoma Intl

1h 29mnonstop

10:47 pm - 11:59 pmSEA Seattle/Tacoma Intl-GEG Spokane

1h 12mnonstop

$322Delta

Fri, Sep 18 - Sun, Sep 20

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

$350Frontier

Wed, Sep 16 - Wed, Sep 16

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

12h 52m1 stop San Diego

9:17 pm - 10:25 pmSEA Seattle/Tacoma Intl-GEG Spokane

1h 08mnonstop

$369Alaska Airlines

Thu, Sep 17 - Mon, Sep 21

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

$379Delta

Wed, Sep 16 - Fri, Oct 2

12:49 pm - 6:51 pmGEG Spokane-SEA Seattle/Tacoma Intl

6h 02m1 stop Portland

9:17 pm - 10:25 pmSEA Seattle/Tacoma Intl-GEG Spokane

1h 08mnonstop

$392Alaska Airlines

Sun, Sep 20 - Sat, Sep 26

8:00 am - 3:45 pmJAC Jackson Hole-SEA Seattle/Tacoma Intl

8h 45m1 stop Los Angeles Los Angeles

6:30 am - 1:45 pmSEA Seattle/Tacoma Intl-JAC Jackson Hole

6h 15m1 stop Los Angeles Los Angeles

$601United Airlines

Sat, Sep 19 - Fri, Sep 25

8:00 am - 4:04 pmJAC Jackson Hole-SEA Seattle/Tacoma Intl

9h 04m1 stop Los Angeles Los Angeles

2:27 pm - 8:46 pmSEA Seattle/Tacoma Intl-JAC Jackson Hole

5h 19m1 stop Denver Intl

$631United Airlines

Useful Info

Low season	January
High season	July
Cheapest flight	$76

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

Most popular time to fly with an average 25% 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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$76 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

Traveling to a place near Seattle?

More options for your flight to Seattle

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

Information on the airport you'll fly into in Seattle

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Find direct flights for Seattle

Flights from domestic origins to Seattle

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