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.

$89 CHEAP FLIGHTS from Idaho to Seattle

Save 21% or more on flights. Compare deals from all over the web.

Never overpay with our price tracking tools.

Filter searches by price, airline and more to find your best flights.

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

Sat, Oct 3 - Sat, Oct 10

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

1h 29mnonstop

11:00 am - 12:18 pmSEA Seattle/Tacoma Intl-GEG Spokane

1h 18mnonstop

$117Delta

Tue, Oct 20 - Sat, Oct 24

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

1h 22mnonstop

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

1h 13mnonstop

$117Delta

Tue, Sep 22 - Tue, Sep 22

8:31 am - 9:48 amGEG Spokane-SEA Seattle/Tacoma Intl

1h 17mnonstop

11:55 am - 11:11 pmSEA Seattle/Tacoma Intl-GEG Spokane

11h 16m2 stops Sacramento Intl Portland

$117Alaska Airlines

Fri, Nov 6 - Sun, Nov 8

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

1h 22mnonstop

10:43 pm - 11:50 pmSEA Seattle/Tacoma Intl-GEG Spokane

1h 07mnonstop

$117Delta

Tue, Sep 29 - Tue, Sep 29

7:20 am - 2:39 pmBOI Boise Air Term. Gowen Fld-SEA Seattle/Tacoma Intl

8h 19m1 stop San Diego

6:05 pm - 8:35 pmSEA Seattle/Tacoma Intl-BOI Boise Air Term. Gowen Fld

1h 30mnonstop

$173Alaska Airlines

Sat, Sep 26 - Sat, Sep 26

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

1h 39mnonstop

10:13 am - 8:20 pmSEA Seattle/Tacoma Intl-BOI Boise Air Term. Gowen Fld

9h 07m1 stop San Diego

$173Alaska Airlines

Thu, Oct 1 - Thu, Oct 8

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

28h 38m1 stop Las Vegas Harry Reid Intl

9:16 pm - 1:55 pmSEA Seattle/Tacoma Intl-BOI Boise Air Term. Gowen Fld

15h 39m1 stop Las Vegas Harry Reid Intl

$222Frontier

Wed, Oct 21 - Sat, Oct 24

4:40 pm - 11:55 pmBOI Boise Air Term. Gowen Fld-SEA Seattle/Tacoma Intl

8h 15m1 stop Phoenix Sky Harbor Intl

9:45 am - 3:25 pmSEA Seattle/Tacoma Intl-BOI Boise Air Term. Gowen Fld

4h 40m1 stop San Jose

$227Southwest

Tue, Oct 6 - Wed, Oct 7

6:50 pm - 11:26 pmBOI Boise Air Term. Gowen Fld-SEA Seattle/Tacoma Intl

5h 36m1 stop San Francisco

7:11 am - 1:03 pmSEA Seattle/Tacoma Intl-BOI Boise Air Term. Gowen Fld

4h 52m1 stop San Francisco

$227United 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

Tue, Sep 8 - Tue, Sep 8

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

1h 17mnonstop

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

1h 08mnonstop

$242Alaska Airlines

Wed, Sep 9 - Thu, Sep 10

6:49 pm - 9:20 amBOI Boise Air Term. Gowen Fld-SEA Seattle/Tacoma Intl

15h 31m1 stop San Diego

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

1h 39mnonstop

$307Alaska Airlines

Wed, Sep 9 - Thu, Sep 10

6:49 pm - 9:20 amBOI Boise Air Term. Gowen Fld-SEA Seattle/Tacoma Intl

15h 31m1 stop San Diego

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

1h 39mnonstop

$307Alaska Airlines

Thu, Sep 10 - Sat, Sep 12

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

$310Frontier

Thu, Sep 10 - Sun, Sep 13

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

$310Frontier

Tue, Sep 8 - Thu, Sep 10

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

26h 44m1 stop Denver 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

Mon, Sep 7 - Tue, Oct 20

9:25 am - 10:55 amGEG Spokane-SEA Seattle/Tacoma Intl

1h 30mnonstop

7:51 pm - 9:10 pmSEA Seattle/Tacoma Intl-GEG Spokane

1h 19mnonstop

$412Delta

Mon, Sep 7 - Fri, Sep 18

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

1h 27mnonstop

7:59 pm - 9:15 pmSEA Seattle/Tacoma Intl-GEG Spokane

1h 16mnonstop

$431Delta

Wed, Sep 9 - Thu, Sep 10

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

8h 45m1 stop Los Angeles Los Angeles

12:44 pm - 8:40 pmSEA Seattle/Tacoma Intl-JAC Jackson Hole

6h 56m1 stop Denver Intl

$621United Airlines

Wed, Sep 9 - Thu, Sep 10

9:28 am - 4:14 pmJAC Jackson Hole-SEA Seattle/Tacoma Intl

7h 46m1 stop San Francisco

6:32 am - 1:45 pmSEA Seattle/Tacoma Intl-JAC Jackson Hole

6h 13m1 stop Los Angeles Los Angeles

$666United Airlines

Useful Info

Low season	January
High season	July
Cheapest flight	$89

Best time to beat the crowds with an average 24% 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

More options for your flight to Seattle

Add a hotel or car rental

Airports

Cabin class

Direct Flights

Origins

Other destinations

Return flight

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

Car rentals in Seattle

SEA

$89 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?

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

Cabin class types available on flights to Idaho

Find direct flights for Seattle

Flights from domestic origins to Seattle

Flights to other popular destinations

Find deals for your return flight