SEA

$85 Find Cheap Flights from Idaho to Seattle - Compare and Save

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight to Seattle departing on 11/9. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

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Flight Deals

Cheap Flights from Idaho to Seattle

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Idaho to Seattle that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Idaho to Seattle

Tue, Sep 1 - Sat, Sep 5
Frontier Logo
1:24 pm - 9:19 amBOI  Boise Air Term. Gowen Fld-SEA Seattle/Tacoma Intl
20h 55m1 stop Denver Intl
Frontier Logo
7:06 pm - 11:29 amSEA  Seattle/Tacoma Intl-BOI Boise Air Term. Gowen Fld
15h 23m1 stop Denver Intl
$176Frontier
Sat, Sep 12 - Sat, Sep 12
Alaska Airlines Logo
1:36 pm - 2:50 pmGEG  Spokane-SEA Seattle/Tacoma Intl
1h 14mnonstop
Alaska Airlines Logo
4:59 pm - 11:53 pmSEA  Seattle/Tacoma Intl-GEG Spokane
6h 54m1 stop San Diego
$181Alaska Airlines
Wed, Sep 9 - Thu, Sep 10
Alaska Airlines Logo
1:30 pm - 10:49 amBOI  Boise Air Term. Gowen Fld-SEA Seattle/Tacoma Intl
22h 19m1 stop Las Vegas Harry Reid Intl
Alaska Airlines Logo
1:03 pm - 3:30 pmSEA  Seattle/Tacoma Intl-BOI Boise Air Term. Gowen Fld
1h 27mnonstop
$182Alaska Airlines
Tue, Oct 13 - Tue, Oct 20
Delta Logo
9:15 am - 10:45 amLWS  Lewiston Nez Perce Rgnl-SEA Seattle/Tacoma Intl
1h 30mnonstop
Delta Logo
9:45 pm - 11:06 pmSEA  Seattle/Tacoma Intl-LWS Lewiston Nez Perce Rgnl
1h 21mnonstop
$189Delta
Fri, Jan 29 - Mon, Feb 1
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
$189Delta
Tue, Sep 1 - Wed, Sep 2
Frontier Logo
1:24 pm - 9:19 amBOI  Boise Air Term. Gowen Fld-SEA Seattle/Tacoma Intl
20h 55m1 stop Denver Intl
Frontier Logo
7:06 pm - 11:29 amSEA  Seattle/Tacoma Intl-BOI Boise Air Term. Gowen Fld
15h 23m1 stop Denver Intl
$194Frontier
Thu, Oct 8 - Sat, Oct 10
JetBlue Logo
6:45 am - 7:39 amBOI  Boise Air Term. Gowen Fld-SEA Seattle/Tacoma Intl
1h 54mnonstop
JetBlue Logo
8:59 am - 11:27 amSEA  Seattle/Tacoma Intl-BOI Boise Air Term. Gowen Fld
1h 28mnonstop
$201JetBlue
Sat, Aug 29 - Sat, Aug 29
Alaska Airlines Logo
6:23 am - 7:02 amBOI  Boise Air Term. Gowen Fld-SEA Seattle/Tacoma Intl
1h 39mnonstop
Alaska Airlines Logo
10:18 am - 8:20 pmSEA  Seattle/Tacoma Intl-BOI Boise Air Term. Gowen Fld
9h 02m1 stop San Diego
$201Alaska Airlines
Tue, Sep 1 - Tue, Sep 22
United Airlines Logo
4:25 pm - 9:31 pmJAC  Jackson Hole-SEA Seattle/Tacoma Intl
6h 06m1 stop Denver Intl
United Airlines Logo
8:40 am - 5:49 pmSEA  Seattle/Tacoma Intl-JAC Jackson Hole
8h 09m1 stop Denver Intl
$299United Airlines
Fri, Nov 13 - Sun, Nov 15
United Airlines Logo
4:10 pm - 9:19 pmJAC  Jackson Hole-SEA Seattle/Tacoma Intl
6h 09m1 stop Denver Intl
United Airlines Logo
5:05 am - 1:25 pmSEA  Seattle/Tacoma Intl-JAC Jackson Hole
7h 20m1 stop Denver Intl
$307United Airlines
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Good to know

Low season

January

Cheapest flight

$85
Best time to beat the crowds with an average 23% drop in price.
Most popular time to fly with an average 25% 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 
Learn how KAYAK collects reviews and tips from users.
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

Everything you need to know for your flight to Seattle

Information on the airport you'll fly into in Seattle

Seattle (SEA)