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.

$69 CHEAP FLIGHTS from Idaho to Seattle

Save 19% 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.

Cheap Flights from Idaho to Seattle

Cheap flights from Idaho to Seattle with top airlines, updated regularly. Compare round-trip, one-way, direct and last-minute deals.

Round-trip

One-way

Last minute

Direct

Thu, Oct 29 - Wed, Dec 2

6:56 pm - 10:05 pmIDA Idaho Falls Fanning Field-SEA Seattle/Tacoma Intl

4h 09m1 stop Salt Lake City

5:30 am - 12:17 pmSEA Seattle/Tacoma Intl-IDA Idaho Falls Fanning Field

5h 47m1 stop Salt Lake City

$137Delta

Fri, Feb 26 - Mon, Mar 1

6:45 pm - 12:11 amIDA Idaho Falls Fanning Field-SEA Seattle/Tacoma Intl

6h 26m1 stop Salt Lake City

5:45 am - 12:27 pmSEA Seattle/Tacoma Intl-IDA Idaho Falls Fanning Field

5h 42m1 stop Salt Lake City

$137Delta

Wed, Feb 3 - Thu, Feb 11

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

$187Delta

Thu, Oct 29 - 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

$187Delta

Sat, Jan 9 - Sat, Jan 9

9:20 am - 7:02 pmBOI Boise Air Term. Gowen Fld-SEA Seattle/Tacoma Intl

10h 42m1 stop Sacramento Intl

9:23 pm - 11:46 pmSEA Seattle/Tacoma Intl-BOI Boise Air Term. Gowen Fld

1h 23mnonstop

$211Alaska Airlines

Mon, Nov 2 - Wed, Nov 4

5:35 pm - 12:55 amBOI Boise Air Term. Gowen Fld-SEA Seattle/Tacoma Intl

8h 20m1 stop Phoenix Sky Harbor Intl

7:00 am - 2:15 pmSEA Seattle/Tacoma Intl-BOI Boise Air Term. Gowen Fld

6h 15m1 stop San Diego

$215Southwest

Wed, Nov 4 - Sun, Nov 8

1:53 pm - 2:31 pmBOI Boise Air Term. Gowen Fld-SEA Seattle/Tacoma Intl

1h 38mnonstop

9:24 pm - 11:49 pmSEA Seattle/Tacoma Intl-BOI Boise Air Term. Gowen Fld

1h 25mnonstop

$217Alaska Airlines

Thu, Dec 17 - Sun, Jan 10

11:55 am - 4:32 pmBOI Boise Air Term. Gowen Fld-SEA Seattle/Tacoma Intl

5h 37m1 stop San Francisco

5:00 am - 11:16 amSEA Seattle/Tacoma Intl-BOI Boise Air Term. Gowen Fld

5h 16m1 stop San Francisco

$217United Airlines

Fri, Nov 6 - Sat, Nov 7

8:59 pm - 9:37 pmBOI Boise Air Term. Gowen Fld-SEA Seattle/Tacoma Intl

1h 38mnonstop

9:56 am - 12:25 pmSEA Seattle/Tacoma Intl-BOI Boise Air Term. Gowen Fld

1h 29mnonstop

$217Alaska Airlines

Mon, Nov 2 - Wed, Nov 4

5:35 pm - 12:55 amBOI Boise Air Term. Gowen Fld-SEA Seattle/Tacoma Intl

8h 20m1 stop Phoenix Sky Harbor Intl

11:35 am - 9:40 pmSEA Seattle/Tacoma Intl-BOI Boise Air Term. Gowen Fld

9h 05m2 stops Sacramento Intl Phoenix Sky Harbor Intl

$220Southwest

Sat, Oct 10 - Wed, Nov 11

9:15 am - 10:45 amLWS Lewiston Nez Perce Rgnl-SEA Seattle/Tacoma Intl

1h 30mnonstop

9:45 pm - 11:03 pmSEA Seattle/Tacoma Intl-LWS Lewiston Nez Perce Rgnl

1h 18mnonstop

$309Delta

Sat, Oct 10 - Wed, Nov 11

12:19 pm - 7:02 pmLWS Lewiston Nez Perce Rgnl-SEA Seattle/Tacoma Intl

6h 43m1 stop Salt Lake City

9:45 pm - 11:03 pmSEA Seattle/Tacoma Intl-LWS Lewiston Nez Perce Rgnl

1h 18mnonstop

$318Delta

Thu, Oct 15 - Sun, Oct 18

2:50 pm - 9:48 amBOI Boise Air Term. Gowen Fld-SEA Seattle/Tacoma Intl

19h 58m1 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

$354Frontier

Sat, Oct 10 - Wed, Nov 11

12:19 pm - 7:02 pmLWS Lewiston Nez Perce Rgnl-SEA Seattle/Tacoma Intl

6h 43m1 stop Salt Lake City

5:35 am - 11:44 amSEA Seattle/Tacoma Intl-LWS Lewiston Nez Perce Rgnl

6h 09m1 stop Salt Lake City

$367Delta

Thu, Oct 15 - Sun, Oct 18

2:50 pm - 9:48 amBOI Boise Air Term. Gowen Fld-SEA Seattle/Tacoma Intl

19h 58m1 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

$374Frontier

Thu, Oct 15 - Wed, Oct 21

2:50 pm - 9:48 amBOI Boise Air Term. Gowen Fld-SEA Seattle/Tacoma Intl

19h 58m1 stop Las Vegas Harry Reid Intl

8:00 pm - 12:40 pmSEA Seattle/Tacoma Intl-BOI Boise Air Term. Gowen Fld

39h 40m2 stops Los Angeles Phoenix Sky Harbor Intl

$414Multiple Airlines

Tue, Oct 13 - Tue, Oct 13

7:20 am - 2:17 pmBOI Boise Air Term. Gowen Fld-SEA Seattle/Tacoma Intl

7h 57m1 stop San Diego

5:40 pm - 8:06 pmSEA Seattle/Tacoma Intl-BOI Boise Air Term. Gowen Fld

1h 26mnonstop

$457Alaska Airlines

Mon, Oct 12 - Mon, Oct 12

6:43 am - 7:20 amBOI Boise Air Term. Gowen Fld-SEA Seattle/Tacoma Intl

1h 37mnonstop

10:20 am - 10:51 pmSEA Seattle/Tacoma Intl-BOI Boise Air Term. Gowen Fld

11h 31m1 stop San Diego

$463Alaska Airlines

Thu, Oct 15 - Wed, Oct 21

9:15 am - 10:45 amLWS Lewiston Nez Perce Rgnl-SEA Seattle/Tacoma Intl

1h 30mnonstop

5:30 am - 11:39 amSEA Seattle/Tacoma Intl-LWS Lewiston Nez Perce Rgnl

6h 09m1 stop Salt Lake City

$467Delta

Tue, Oct 13 - Tue, Oct 20

6:04 pm - 6:47 pmBOI Boise Air Term. Gowen Fld-SEA Seattle/Tacoma Intl

1h 43mnonstop

11:33 am - 2:11 pmSEA Seattle/Tacoma Intl-BOI Boise Air Term. Gowen Fld

1h 38mnonstop

$507Alaska Airlines

Wed, Feb 3 - Thu, Feb 11

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

$187Delta

Thu, Oct 29 - 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

$187Delta

Fri, Dec 18 - Sun, Jan 3

9:08 am - 10:39 amLWS Lewiston Nez Perce Rgnl-SEA Seattle/Tacoma Intl

1h 31mnonstop

9:40 pm - 10:59 pmSEA Seattle/Tacoma Intl-LWS Lewiston Nez Perce Rgnl

1h 19mnonstop

$207Delta

Wed, Nov 4 - Sun, Nov 8

1:53 pm - 2:31 pmBOI Boise Air Term. Gowen Fld-SEA Seattle/Tacoma Intl

1h 38mnonstop

9:24 pm - 11:49 pmSEA Seattle/Tacoma Intl-BOI Boise Air Term. Gowen Fld

1h 25mnonstop

$217Alaska Airlines

Fri, Nov 6 - Sat, Nov 7

8:59 pm - 9:37 pmBOI Boise Air Term. Gowen Fld-SEA Seattle/Tacoma Intl

1h 38mnonstop

9:56 am - 12:25 pmSEA Seattle/Tacoma Intl-BOI Boise Air Term. Gowen Fld

1h 29mnonstop

$217Alaska Airlines

Sat, Nov 7 - Sun, Nov 8

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

1h 42mnonstop

8:59 am - 11:27 amSEA Seattle/Tacoma Intl-BOI Boise Air Term. Gowen Fld

1h 28mnonstop

$217Delta

Tue, Dec 1 - Fri, Dec 4

12:20 pm - 1:14 pmBOI Boise Air Term. Gowen Fld-SEA Seattle/Tacoma Intl

1h 54mnonstop

9:20 pm - 11:52 pmSEA Seattle/Tacoma Intl-BOI Boise Air Term. Gowen Fld

1h 32mnonstop

$217Delta

Sun, Nov 15 - Fri, Nov 20

8:55 am - 9:59 amBOI Boise Air Term. Gowen Fld-SEA Seattle/Tacoma Intl

2h 04mnonstop

9:20 pm - 11:50 pmSEA Seattle/Tacoma Intl-BOI Boise Air Term. Gowen Fld

1h 30mnonstop

$217Delta

Sun, Nov 15 - Wed, Nov 18

7:18 pm - 8:12 pmBOI Boise Air Term. Gowen Fld-SEA Seattle/Tacoma Intl

1h 54mnonstop

4:05 pm - 6:38 pmSEA Seattle/Tacoma Intl-BOI Boise Air Term. Gowen Fld

1h 33mnonstop

$217Delta

Thu, Nov 5 - Wed, Nov 11

8:59 pm - 9:37 pmBOI Boise Air Term. Gowen Fld-SEA Seattle/Tacoma Intl

1h 38mnonstop

11:59 am - 2:27 pmSEA Seattle/Tacoma Intl-BOI Boise Air Term. Gowen Fld

1h 28mnonstop

$217Alaska Airlines

Low season	January
High season	July
Cheapest flight	$69

Best time to beat the crowds with an average 26% drop in price.

Most popular time to fly with an average 23% increase in price.

Flight from Idaho Falls 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

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

$69 Find Cheap Flights from Idaho to Seattle - Compare and Save

Cheap Flights from Idaho to Seattle

Cheap flights from Idaho to Seattle with top airlines, updated regularly. Compare round-trip, one-way, direct and last-minute deals.

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