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.

$107 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

Sun, Dec 6 - Tue, Dec 8

6:59 pm - 12:05 amIDA Idaho Falls Fanning Field-SEA Seattle/Tacoma Intl

6h 06m1 stop Salt Lake City

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

5h 47m1 stop Salt Lake City

$177Delta

Thu, Dec 3 - Sat, Dec 5

7:45 pm - 8:27 pmBOI Boise Air Term. Gowen Fld-SEA Seattle/Tacoma Intl

1h 42mnonstop

1:02 pm - 3:26 pmSEA Seattle/Tacoma Intl-BOI Boise Air Term. Gowen Fld

1h 24mnonstop

$217Alaska Airlines

Wed, Dec 23 - Mon, Dec 28

6:15 am - 7:14 amBOI Boise Air Term. Gowen Fld-SEA Seattle/Tacoma Intl

1h 59mnonstop

10:46 am - 1:30 pmSEA Seattle/Tacoma Intl-BOI Boise Air Term. Gowen Fld

1h 44mnonstop

$217Delta

Sat, Dec 5 - Thu, Dec 10

4:10 pm - 4:54 pmBOI Boise Air Term. Gowen Fld-SEA Seattle/Tacoma Intl

1h 44mnonstop

9:30 pm - 11:59 pmSEA Seattle/Tacoma Intl-BOI Boise Air Term. Gowen Fld

1h 29mnonstop

$217Alaska Airlines

Sat, Dec 5 - Sun, Dec 6

10:37 am - 11:34 amBOI Boise Air Term. Gowen Fld-SEA Seattle/Tacoma Intl

1h 57mnonstop

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

1h 32mnonstop

$217Delta

Fri, Dec 4 - Sat, Dec 5

7:45 pm - 8:27 pmBOI Boise Air Term. Gowen Fld-SEA Seattle/Tacoma Intl

1h 42mnonstop

1:02 pm - 3:26 pmSEA Seattle/Tacoma Intl-BOI Boise Air Term. Gowen Fld

1h 24mnonstop

$217Alaska Airlines

Fri, Dec 11 - Sat, Dec 12

5:56 pm - 6:44 pmBOI Boise Air Term. Gowen Fld-SEA Seattle/Tacoma Intl

1h 48mnonstop

7:50 pm - 10:24 pmSEA Seattle/Tacoma Intl-BOI Boise Air Term. Gowen Fld

1h 34mnonstop

$217Delta

Sat, Dec 5 - Tue, Dec 8

10:10 am - 2:22 pmBOI Boise Air Term. Gowen Fld-SEA Seattle/Tacoma Intl

5h 12m1 stop San Francisco

9:01 am - 2:50 pmSEA Seattle/Tacoma Intl-BOI Boise Air Term. Gowen Fld

4h 49m1 stop San Francisco

$227United Airlines

Tue, Dec 22 - Tue, Jan 5

6:10 pm - 1:10 amBOI Boise Air Term. Gowen Fld-SEA Seattle/Tacoma Intl

8h 00m1 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

$227Southwest

Wed, Dec 16 - Sat, Jan 9

6:40 pm - 10:20 pmBOI Boise Air Term. Gowen Fld-SEA Seattle/Tacoma Intl

4h 40m1 stop Sacramento Intl

6:15 am - 3:10 pmSEA Seattle/Tacoma Intl-BOI Boise Air Term. Gowen Fld

7h 55m1 stop Las Vegas Harry Reid Intl

$227Southwest

Recent last minute flight deals from Idaho to Seattle

Sat, Nov 7 - Sat, Nov 7

8:30 am - 4:56 pmBOI Boise Air Term. Gowen Fld-SEA Seattle/Tacoma Intl

9h 26m1 stop San Diego

7:50 pm - 10:20 pmSEA Seattle/Tacoma Intl-BOI Boise Air Term. Gowen Fld

1h 30mnonstop

$281Alaska Airlines

Tue, Nov 10 - Tue, Nov 17

9:08 am - 10:47 amLWS Lewiston Nez Perce Rgnl-SEA Seattle/Tacoma Intl

1h 39mnonstop

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

1h 18mnonstop

$349Delta

Sun, Nov 8 - Sun, Nov 15

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

$349Delta

Tue, Nov 10 - Tue, Nov 17

9:08 am - 10:47 amLWS Lewiston Nez Perce Rgnl-SEA Seattle/Tacoma Intl

1h 39mnonstop

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

6h 09m1 stop Salt Lake City

$358Delta

Fri, Nov 6 - Sat, Nov 7

6:43 pm - 2:45 pmBOI Boise Air Term. Gowen Fld-SEA Seattle/Tacoma Intl

21h 02m1 stop San Diego

5:38 pm - 8:02 pmSEA Seattle/Tacoma Intl-BOI Boise Air Term. Gowen Fld

1h 24mnonstop

$407Alaska Airlines

Thu, Nov 5 - Fri, Nov 6

6:43 pm - 5:55 pmBOI Boise Air Term. Gowen Fld-SEA Seattle/Tacoma Intl

24h 12m1 stop San Diego

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

1h 25mnonstop

$407Alaska Airlines

Thu, Nov 5 - Thu, Nov 5

1:53 pm - 2:57 pmIDA Idaho Falls Fanning Field-SEA Seattle/Tacoma Intl

2h 04mnonstop

4:59 pm - 1:16 pmSEA Seattle/Tacoma Intl-IDA Idaho Falls Fanning Field

19h 17m2 stops Los Angeles Portland

$451Alaska Airlines

Sat, Nov 7 - Sat, Nov 14

7:00 am - 12:00 pmBOI Boise Air Term. Gowen Fld-SEA Seattle/Tacoma Intl

6h 00m1 stop San Diego

8:35 am - 2:05 pmSEA Seattle/Tacoma Intl-BOI Boise Air Term. Gowen Fld

4h 30m1 stop Oakland

$547Southwest

Tue, Nov 10 - Tue, Nov 17

6:20 am - 1:00 pmBOI Boise Air Term. Gowen Fld-SEA Seattle/Tacoma Intl

7h 40m1 stop Las Vegas Harry Reid Intl

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

6h 15m1 stop San Diego

$547Southwest

Mon, Nov 9 - Thu, Nov 19

6:20 am - 12:20 pmBOI Boise Air Term. Gowen Fld-SEA Seattle/Tacoma Intl

7h 00m1 stop San Francisco

3:35 pm - 11:33 pmSEA Seattle/Tacoma Intl-BOI Boise Air Term. Gowen Fld

6h 58m1 stop San Francisco

$547United Airlines

Recent direct flight deals from Idaho to Seattle

Thu, Dec 3 - Sat, Dec 5

7:45 pm - 8:27 pmBOI Boise Air Term. Gowen Fld-SEA Seattle/Tacoma Intl

1h 42mnonstop

1:02 pm - 3:26 pmSEA Seattle/Tacoma Intl-BOI Boise Air Term. Gowen Fld

1h 24mnonstop

$217Alaska Airlines

Sat, Dec 5 - Thu, Dec 10

4:10 pm - 4:54 pmBOI Boise Air Term. Gowen Fld-SEA Seattle/Tacoma Intl

1h 44mnonstop

9:30 pm - 11:59 pmSEA Seattle/Tacoma Intl-BOI Boise Air Term. Gowen Fld

1h 29mnonstop

$217Alaska Airlines

Wed, Dec 23 - Mon, Dec 28

6:15 am - 7:14 amBOI Boise Air Term. Gowen Fld-SEA Seattle/Tacoma Intl

1h 59mnonstop

10:46 am - 1:30 pmSEA Seattle/Tacoma Intl-BOI Boise Air Term. Gowen Fld

1h 44mnonstop

$217Delta

Sat, Dec 5 - Sun, Dec 6

10:37 am - 11:34 amBOI Boise Air Term. Gowen Fld-SEA Seattle/Tacoma Intl

1h 57mnonstop

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

1h 32mnonstop

$217Delta

Fri, Dec 4 - Sat, Dec 5

7:45 pm - 8:27 pmBOI Boise Air Term. Gowen Fld-SEA Seattle/Tacoma Intl

1h 42mnonstop

1:02 pm - 3:26 pmSEA Seattle/Tacoma Intl-BOI Boise Air Term. Gowen Fld

1h 24mnonstop

$217Alaska Airlines

Sat, Jan 9 - Mon, Jan 11

5:48 pm - 6:30 pmBOI Boise Air Term. Gowen Fld-SEA Seattle/Tacoma Intl

1h 42mnonstop

3:43 pm - 6:04 pmSEA Seattle/Tacoma Intl-BOI Boise Air Term. Gowen Fld

1h 21mnonstop

$217Alaska Airlines

Mon, Jan 25 - Sat, Feb 27

5:48 pm - 6:30 pmBOI Boise Air Term. Gowen Fld-SEA Seattle/Tacoma Intl

1h 42mnonstop

9:50 am - 12:21 pmSEA Seattle/Tacoma Intl-BOI Boise Air Term. Gowen Fld

1h 31mnonstop

$217Alaska Airlines

Sat, Jan 9 - Mon, Jan 11

6:37 am - 7:25 amBOI Boise Air Term. Gowen Fld-SEA Seattle/Tacoma Intl

1h 48mnonstop

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

1h 23mnonstop

$217Alaska Airlines

Sat, Dec 5 - Sun, Dec 6

6:37 am - 7:25 amBOI Boise Air Term. Gowen Fld-SEA Seattle/Tacoma Intl

1h 48mnonstop

9:50 am - 12:21 pmSEA Seattle/Tacoma Intl-BOI Boise Air Term. Gowen Fld

1h 31mnonstop

$217Alaska Airlines

Sat, Dec 5 - Sun, Dec 6

6:00 pm - 6:50 pmBOI Boise Air Term. Gowen Fld-SEA Seattle/Tacoma Intl

1h 50mnonstop

7:00 am - 9:30 amSEA Seattle/Tacoma Intl-BOI Boise Air Term. Gowen Fld

1h 30mnonstop

$217Alaska Airlines

Useful Info

Low season	January
High season	July
Cheapest flight	$107

Best time to beat the crowds with an average 27% drop in price.

Most popular time to fly with an average 20% increase in price.

Flight from Boise 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

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$107 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

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