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$106 Find Cheap Flights from Idaho to Seattle - Compare and Save

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1 adult, Economy, 0 bags

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Flight Deals

Cheap Flights from Idaho to Seattle

 
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Idaho to Seattle

Tue, Jan 12 - Wed, Jan 27
Delta Logo
6:25 am - 7:55 amLWS  Lewiston Nez Perce Rgnl-SEA Seattle/Tacoma Intl
1h 30mnonstop
Delta Logo
9:30 pm - 10:49 pmSEA  Seattle/Tacoma Intl-LWS Lewiston Nez Perce Rgnl
1h 19mnonstop
$209Delta
Mon, Dec 21 - Thu, Jan 7
Delta Logo
7:00 am - 8:32 amLWS  Lewiston Nez Perce Rgnl-SEA Seattle/Tacoma Intl
1h 32mnonstop
Delta Logo
9:30 pm - 10:49 pmSEA  Seattle/Tacoma Intl-LWS Lewiston Nez Perce Rgnl
1h 19mnonstop
$209Delta
Wed, Jan 27 - Wed, Feb 3
Alaska Airlines Logo
7:37 pm - 8:28 pmSUN  Hailey Sun Valley-Friedman-SEA Seattle/Tacoma Intl
1h 51mnonstop
Alaska Airlines Logo
4:21 pm - 6:55 pmSEA  Seattle/Tacoma Intl-SUN Hailey Sun Valley-Friedman
1h 34mnonstop
$217Alaska Airlines
Sat, Oct 31 - Tue, Nov 3
Alaska Airlines Logo
11:48 am - 12:44 pmSUN  Hailey Sun Valley-Friedman-SEA Seattle/Tacoma Intl
1h 56mnonstop
Alaska Airlines Logo
8:15 am - 10:51 amSEA  Seattle/Tacoma Intl-SUN Hailey Sun Valley-Friedman
1h 36mnonstop
$217Alaska Airlines
Sat, Oct 24 - Sun, Oct 25
Delta Logo
10:34 am - 11:31 amBOI  Boise Air Term. Gowen Fld-SEA Seattle/Tacoma Intl
1h 57mnonstop
Delta Logo
7:15 am - 9:54 amSEA  Seattle/Tacoma Intl-BOI Boise Air Term. Gowen Fld
1h 39mnonstop
$217Delta
Fri, Nov 27 - Wed, Jan 6
Alaska Airlines Logo
4:20 pm - 5:00 pmBOI  Boise Air Term. Gowen Fld-SEA Seattle/Tacoma Intl
1h 40mnonstop
Alaska Airlines Logo
1:59 pm - 4:20 pmSEA  Seattle/Tacoma Intl-BOI Boise Air Term. Gowen Fld
1h 21mnonstop
$217Alaska Airlines
Tue, Dec 15 - Sun, Jan 10
Delta Logo
3:44 pm - 4:40 pmBOI  Boise Air Term. Gowen Fld-SEA Seattle/Tacoma Intl
1h 56mnonstop
Delta Logo
1:30 pm - 4:00 pmSEA  Seattle/Tacoma Intl-BOI Boise Air Term. Gowen Fld
1h 30mnonstop
$217Delta
Wed, Feb 17 - Sat, Feb 20
United Airlines Logo
6:20 am - 10:21 amBOI  Boise Air Term. Gowen Fld-SEA Seattle/Tacoma Intl
5h 01m1 stop San Francisco
United Airlines Logo
10:45 am - 7:16 pmSEA  Seattle/Tacoma Intl-BOI Boise Air Term. Gowen Fld
7h 31m1 stop San Francisco
$227United Airlines
Sat, Nov 7 - Wed, Nov 11
United Airlines Logo
12:00 pm - 4:26 pmBOI  Boise Air Term. Gowen Fld-SEA Seattle/Tacoma Intl
5h 26m1 stop San Francisco
United Airlines Logo
9:05 am - 4:42 pmSEA  Seattle/Tacoma Intl-BOI Boise Air Term. Gowen Fld
6h 37m1 stop San Francisco
$227United Airlines
Sat, Oct 31 - Tue, Nov 3
Southwest Logo
6:00 am - 10:25 amBOI  Boise Air Term. Gowen Fld-SEA Seattle/Tacoma Intl
5h 25m1 stop Las Vegas Harry Reid Intl
Southwest Logo
7:00 am - 2:15 pmSEA  Seattle/Tacoma Intl-BOI Boise Air Term. Gowen Fld
6h 15m1 stop San Diego
$227Southwest
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Good to know

Low season

January

Cheapest flight

$106
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

Flights from Idaho to Seattle: the best tips from KAYAK users

Insights shared by verified travelers who flew the route from Idaho 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.

FAQs for booking flights from Idaho to Seattle

  • 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.

Traveling to a place near Seattle?

Book flights to Seattle if you plan to visit one of these locations
Lynnwood
Centralia
Fife
Lakewood
Westport
Lacey
Mukilteo
Woodinville
Poulsbo
Edmonds
Aberdeen
DuPont
Shoreline
Monroe
Castle Rock
Edgewood

More options for your flight to Seattle