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

Thu, Oct 22 - Thu, Oct 29

12:42 pm - 1:56 pmGEG Spokane-SEA Seattle/Tacoma Intl

1h 14mnonstop

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

1h 03mnonstop

$110Alaska Airlines

Tue, Oct 20 - Tue, Oct 27

6:03 am - 7:20 amGEG Spokane-SEA Seattle/Tacoma Intl

1h 17mnonstop

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

1h 03mnonstop

$110Alaska Airlines

Thu, Oct 1 - Sun, Oct 4

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

1h 17mnonstop

10:20 am - 11:39 amSEA Seattle/Tacoma Intl-GEG Spokane

1h 19mnonstop

$111Alaska Airlines

Fri, Nov 6 - Mon, Nov 9

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

1h 22mnonstop

9:03 am - 10:19 amSEA Seattle/Tacoma Intl-GEG Spokane

1h 16mnonstop

$117Delta

Sat, Oct 24 - Sun, Nov 1

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

1h 27mnonstop

8:09 pm - 9:22 pmSEA Seattle/Tacoma Intl-GEG Spokane

1h 13mnonstop

$117Delta

Mon, Dec 21 - Tue, Dec 29

5:00 am - 6:23 amGEG Spokane-SEA Seattle/Tacoma Intl

1h 23mnonstop

10:59 pm - 12:14 amSEA Seattle/Tacoma Intl-GEG Spokane

1h 15mnonstop

$117Delta

Tue, Oct 13 - Wed, Oct 14

1:25 pm - 11:00 pmBOI Boise Air Term. Gowen Fld-SEA Seattle/Tacoma Intl

10h 35m2 stops Oakland Las Vegas Harry Reid Intl

5:35 am - 4:00 pmSEA Seattle/Tacoma Intl-BOI Boise Air Term. Gowen Fld

9h 25m2 stops Phoenix Sky Harbor Intl Las Vegas Harry Reid Intl

$161Southwest

Wed, Jan 6 - Sat, Jan 9

11:40 am - 9:30 pmBOI Boise Air Term. Gowen Fld-SEA Seattle/Tacoma Intl

10h 50m2 stops Las Vegas Harry Reid Intl Phoenix Sky Harbor Intl

6:05 am - 3:00 pmSEA Seattle/Tacoma Intl-BOI Boise Air Term. Gowen Fld

7h 55m2 stops Phoenix Sky Harbor Intl Las Vegas Harry Reid Intl

$161Southwest

Thu, Oct 22 - Sat, Oct 24

2:48 pm - 9:15 pmJAC Jackson Hole-SEA Seattle/Tacoma Intl

7h 27m1 stop Denver Intl

12:43 pm - 8:46 pmSEA Seattle/Tacoma Intl-JAC Jackson Hole

7h 03m1 stop Denver Intl

$297United Airlines

Thu, Oct 29 - Sat, Oct 31

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

Fri, Sep 11 - 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

$280Frontier

Mon, Sep 14 - Tue, Oct 13

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

19h 52m1 stop Las Vegas Harry Reid Intl

9:57 am - 12:35 pmSEA Seattle/Tacoma Intl-BOI Boise Air Term. Gowen Fld

1h 38mnonstop

$302Multiple Airlines

Mon, Sep 14 - Mon, Sep 14

7:20 am - 6:52 pmBOI Boise Air Term. Gowen Fld-SEA Seattle/Tacoma Intl

12h 32m1 stop San Diego

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

1h 26mnonstop

$307Alaska Airlines

Fri, Sep 11 - Sun, Sep 13

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

Thu, Sep 10 - Thu, Sep 10

7:40 am - 8:57 amGEG Spokane-SEA Seattle/Tacoma Intl

1h 17mnonstop

11:32 am - 11:53 pmSEA Seattle/Tacoma Intl-GEG Spokane

12h 21m1 stop San Diego

$349Alaska Airlines

Fri, Sep 11 - Fri, Sep 11

10:37 am - 11:49 amGEG Spokane-SEA Seattle/Tacoma Intl

1h 12mnonstop

2:18 pm - 11:53 pmSEA Seattle/Tacoma Intl-GEG Spokane

9h 35m1 stop San Diego

$353Alaska Airlines

Sat, Sep 12 - Sat, Sep 19

5:59 pm - 6:41 pmBOI Boise Air Term. Gowen Fld-SEA Seattle/Tacoma Intl

1h 42mnonstop

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

1h 37mnonstop

$459Delta

Mon, Sep 14 - Wed, Sep 23

5:49 pm - 7:14 pmGEG Spokane-SEA Seattle/Tacoma Intl

1h 25mnonstop

3:55 pm - 5:09 pmSEA Seattle/Tacoma Intl-GEG Spokane

1h 14mnonstop

$477Delta

Mon, Sep 14 - Mon, Sep 28

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

8h 45m1 stop Los Angeles

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

6h 15m1 stop Los Angeles

$526United Airlines

Mon, Sep 14 - Mon, Sep 28

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

8h 45m1 stop Los Angeles

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

6h 44m1 stop Denver Intl

$546United 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 24% 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

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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?

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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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