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. Visit our flight page for the latest deals!>/a>

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. Visit our flight page for the latest deals!>/a>

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. Visit our flight page for the latest deals!>/a>

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. Visit our flight page for the latest deals!>/a>

$89 CHEAP FLIGHTS from Idaho to Seattle

SEA

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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

Tue, May 5 - Tue, May 12

6:08 pm - 6:48 pm

BOI

SEA

1h 40mnonstop

12:55 pm - 3:33 pm

SEA

BOI

1h 38mnonstop

$157Alaska Airlines

Sat, May 2 - Sun, May 3

6:00 am - 6:40 am

BOI

SEA

1h 40mnonstop

9:24 pm - 11:59 pm

SEA

BOI

1h 35mnonstop

$163Alaska Airlines

Sat, May 2 - Mon, May 4

6:00 am - 6:40 am

BOI

SEA

1h 40mnonstop

9:24 pm - 11:59 pm

SEA

BOI

1h 35mnonstop

$167Alaska Airlines

Sat, Apr 25 - Sun, Apr 26

1:52 pm - 2:40 pm

BOI

SEA

1h 48mnonstop

7:20 am - 10:01 am

SEA

BOI

1h 41mnonstop

$175Delta

Thu, May 7 - Mon, May 11

6:00 pm - 6:42 pm

BOI

SEA

1h 42mnonstop

7:15 am - 9:54 am

SEA

BOI

1h 39mnonstop

$177Delta

Tue, May 5 - Tue, May 12

5:00 pm - 10:55 pm

BOI

SEA

6h 55m

1 stop

11:40 am - 11:30 pm

SEA

BOI

10h 50m

2 stops

$182Southwest

Sat, May 2 - Mon, May 4

7:05 am - 12:05 pm

BOI

SEA

6h 00m

1 stop

9:40 am - 6:20 pm

SEA

BOI

7h 40m

1 stop

$187Southwest

Thu, Apr 30 - Sat, May 2

1:25 pm - 10:47 pm

JAC

SEA

10h 22m

1 stop

12:59 am - 12:41 pm

SEA

JAC

10h 42m

1 stop

$311American Airlines

Sat, May 2 - Sat, May 9

4:15 pm - 9:06 pm

JAC

SEA

5h 51m

1 stop

5:02 am - 1:21 pm

SEA

JAC

7h 19m

1 stop

$322United Airlines

Wed, Apr 22 - Sun, Apr 26

4:15 pm - 9:06 pm

JAC

SEA

5h 51m

1 stop

5:00 am - 1:21 pm

SEA

JAC

7h 21m

1 stop

$381United Airlines

Useful Info

Low season	January
High season	July
Cheapest flight	$89

Best time to beat the crowds with an average 17% drop in price.

Most popular time to fly with an average 15% increase in price.

Flight from Boise to Seattle

AllisonFlew with Alaska Airlines

BOI

SEA

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

IDA

SEA

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

Mukilteo

Westport

Lacey

Aberdeen

Woodinville

Poulsbo

Edmonds

DuPont

Shoreline

Monroe

Castle Rock

Edgewood

Everything you need to know for your flight to Seattle

Airports

Cabin class

Complete your trip

Direct Flights

Flights to other cities

Origins

Other airports

Return flight deals

Information on the airport you'll fly into in Seattle

Seattle (SEA)

SEA

$89 Find Cheap Flights from Idaho to Seattle

KAYAK searches hundreds of travel sites at once for deals on flights to Seattle

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

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

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?

Everything you need to know for your flight to Seattle

Information on the airport you'll fly into in Seattle

Cabin class types available on flights to Idaho

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

Find direct flights for Seattle

Flights to other popular destinations

Flights from domestic origins to Seattle

Choose which airport to fly into in Seattle

Find deals for your return flight