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$60+ Cheap flights from Idaho to Seattle (SEA)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 10/14. Fares are subject to change and may not be available on all flights or dates of travel.
BOI — SEA
Oct 16 — Oct 231
Thu 10/16
Thu 10/23
1 adult, Economy
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Cheap flight deals from Idaho to Seattle

Keep the following information in mind while searching for Idaho to Seattle flight deals. Data was last updated September 16, 2025.

Round-trip from

$126
(Kiwi.com)

One-way from

$60
(Delta)

Popular in

November

Cheapest in

February

Average price

$197

Good round-trip deal

$254 or less

Good one-way deal

$141 or less
From Idaho to Seattle/Tacoma Intl
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One-way flight from Idaho to Seattle/Tacoma Intl
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Highest demand for flights based on searches. 5% potential increase in price ($12 potential increase over avg. RT price).
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Cheapest flight prices on average. 1% potential price decrease ($3 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Price to beat on a round-trip flight from Idaho to Seattle/Tacoma Intl.
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Price to beat on a one-way flight from Idaho to Seattle/Tacoma Intl.
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Find flight deals from Idaho to Seattle

Cheapest flights from Idaho to Seattle
Explore the most affordable flight options available from Idaho to Seattle. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 16, 2025.

This Kiwi.com deal was found by Cheapflights users on 9/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/115:38 pmBOI - SEA
Nonstop1h 37mHawaiian Airlines
Mon 10/139:30 pmSEA - BOI
Nonstop1h 26mHawaiian Airlines
Deal found 9/14$126
This Hawaiian Airlines deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Hawaiian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/115:38 pmBOI - SEA
Nonstop1h 37mHawaiian Airlines
Tue 10/143:50 pmSEA - BOI
1 stop5h 04mHawaiian Airlines
Deal found 9/15$127
This Cheapflightsfares deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/99:00 amBOI - SEA
Nonstop1h 42mAlaska Airlines
Sat 10/111:21 pmSEA - BOI
Nonstop1h 24mAlaska Airlines
Deal found 9/15$132
This Alaska Airlines deal was found by Cheapflights users on 9/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/111:50 pmBOI - SEA
1 stop6h 20mAlaska Airlines
Tue 10/143:50 pmSEA - BOI
1 stop5h 04mAlaska Airlines
Deal found 9/16$136
This Delta deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/131:54 pmBOI - SEA
Nonstop1h 51mDelta
Sun 1/47:45 amSEA - BOI
Nonstop1h 36mDelta
Deal found 9/15$137
This Southwest deal was found by Cheapflights users on 9/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/76:20 amBOI - SEA
1 stop6h 25mSouthwest
Tue 10/71:20 pmSEA - BOI
1 stop8h 45mSouthwest
Deal found 9/16$142
This KAYAK deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/178:26 pmBOI - SEA
Nonstop1h 43mAlaska Airlines
Mon 10/209:30 pmSEA - BOI
Nonstop1h 26mAlaska Airlines
Deal found 9/15$143
This Southwest deal was found by Cheapflights users on 9/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/225:30 pmBOI - SEA
1 stop6h 15mSouthwest
Sat 10/253:30 pmSEA - BOI
1 stop6h 35mSouthwest
Deal found 9/14$144
This Delta deal was found by Cheapflights users on 9/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/225:05 amGEG - SEA
Nonstop1h 29mDelta
Sat 11/297:10 amSEA - GEG
Nonstop1h 23mDelta
Deal found 9/16$157
This Kiwi.com deal was found by Cheapflights users on 9/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/41:31 pmGEG - SEA
Nonstop1h 15mHawaiian Airlines
Sun 10/58:30 amSEA - GEG
Nonstop1h 02mHawaiian Airlines
Deal found 9/13$158
This Alaska Airlines deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/157:35 amGEG - SEA
Nonstop1h 20mAlaska Airlines
Sat 11/1512:39 pmSEA - GEG
1 stop6h 15mAlaska Airlines
Deal found 9/15$161
This Kiwi.com deal was found by Cheapflights users on 9/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/115:54 pmGEG - SEA
Nonstop1h 16mHawaiian Airlines
Sun 10/128:30 amSEA - GEG
Nonstop1h 02mHawaiian Airlines
Deal found 9/16$165

Cheapflights Fare Finder

 
Customize your flight search to find flights from Idaho to Seattle that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated September 16, 2025.
Use the filters below to find and compare flights from Idaho to Seattle that are best for you.

Fly from

Idaho

Fly to

Seattle

Route

Depart

Return

Price

BoiseSeattle

BOI - SEA

BOISEA

Boise Air Term. Gowen Fld

Tue 3/3

1:30 pm-4:54 pm

1 stop4h 24m

Seattle/Tacoma Intl

Wed 3/4

8:00 am-12:44 pm

1 stop3h 44m

$136

BoiseSeattle

BOI - SEA

BOISEA

Boise Air Term. Gowen Fld

Thu 11/13

5:17 am-6:15 am

Nonstop1h 58m

Seattle/Tacoma Intl

Tue 11/18

10:35 am-1:09 pm

Nonstop1h 34m

$137

BoiseSeattle

BOI - SEA

BOISEA

Boise Air Term. Gowen Fld

Sat 10/11

2:00 pm-2:45 pm

Nonstop1h 45m

Seattle/Tacoma Intl

Thu 10/16

9:35 pm-12:08 am

Nonstop1h 33m

$137

BoiseSeattle

BOI - SEA

BOISEA

Boise Air Term. Gowen Fld

Wed 11/12

9:00 am-10:11 am

Nonstop2h 11m

Seattle/Tacoma Intl

Sun 11/16

7:30 pm-10:07 pm

Nonstop1h 37m

$137

BoiseSeattle

BOI - SEA

BOISEA

Boise Air Term. Gowen Fld

Sat 10/11

2:00 pm-2:45 pm

Nonstop1h 45m

Seattle/Tacoma Intl

Mon 10/13

9:35 pm-12:08 am

Nonstop1h 33m

$137

BoiseSeattle

BOI - SEA

BOISEA

Boise Air Term. Gowen Fld

Wed 11/5

7:40 am-8:28 am

Nonstop1h 48m

Seattle/Tacoma Intl

Sun 11/9

5:51 pm-8:25 pm

Nonstop1h 34m

$137

BoiseSeattle

BOI - SEA

BOISEA

Boise Air Term. Gowen Fld

Fri 11/7

2:00 pm-2:45 pm

Nonstop1h 45m

Seattle/Tacoma Intl

Tue 11/11

8:30 am-11:02 am

Nonstop1h 32m

$137

BoiseSeattle

BOI - SEA

BOISEA

Boise Air Term. Gowen Fld

Thu 12/18

5:17 am-6:19 am

Nonstop2h 02m

Seattle/Tacoma Intl

Sat 1/10

7:30 pm-9:58 pm

Nonstop1h 28m

$137

BoiseSeattle

BOI - SEA

BOISEA

Boise Air Term. Gowen Fld

Tue 12/23

5:42 am-6:40 am

Nonstop1h 58m

Seattle/Tacoma Intl

Thu 1/1

7:45 am-10:21 am

Nonstop1h 36m

$137

BoiseSeattle

BOI - SEA

BOISEA

Boise Air Term. Gowen Fld

Fri 10/24

2:00 pm-2:45 pm

Nonstop1h 45m

Seattle/Tacoma Intl

Sat 11/1

5:45 pm-8:16 pm

Nonstop1h 31m

$137

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/16

Showing 1-10 of 60 results
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Best time to book a flight from Idaho to Seattle

Have a flexible travel schedule? Discover the best time to fly to Seattle from Idaho with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Idaho to Seattle

What is the cheapest month to book a flight from Idaho to Seattle?

Currently, January is the cheapest month in which you can book a flight from Idaho to Seattle (average of $238). Flying from Idaho to Seattle in June is currently the most expensive (average of $387). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from ID to SEA?

Find hourly flight availability from Idaho to Seattle. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated September 16, 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Idaho to Seattle as you normally would.

Weekly flight availability from Idaho to Seattle

Explore weekly flight availability from Idaho to Seattle. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated September 16, 2025.

The most flights from USID to SEA are scheduled on a Tuesday (64 on average). You will have fewer flight options on Sunday, which is when the least amount of flights are scheduled (48 on average).

How much does it cost to fly round-trip from Idaho to Seattle?

Related info for your journey

Find useful and relevant information for your journey from Idaho to Seattle. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly into for flights to Seattle from Idaho?

    Located just 11.4 mi from the city center, Seattle/Tacoma Intl (SEA) is the airport most travelers will use when flying to Seattle from Idaho.

  • How popular is this Idaho to Seattle flight route?

    This flight path from Idaho to Seattle/Tacoma Intl was viewed by 77 users in the past month. Keep an eye out for changes in search interest prior to high and low season.

  • How long is the flight from Idaho to Seattle?

    There are many flights that can get you from Idaho to Seattle in 1h 58m. Fly via Alaska Airlines, Delta, or Hawaiian Airlines to get the fastest option. Airlines will cover a distance of 398 mi. This flight may include one or multiple stops.

  • What are the cheapest airlines to fly from Idaho to Seattle one-way?

    One-way options have recently been found by users for as low as $68 on Hawaiian Airlines. Other airlines that offer cheap prices include Alaska Airlines from $68 and Delta from $89 one-way.

  • What are the most popular routes from Idaho to Seattle?

    Most travelers choose Boise Air Term. Gowen Fld - Seattle/Tacoma Intl, Spokane - Seattle/Tacoma Intl or Idaho Falls Fanning Field - Seattle/Tacoma Intl when deciding on the best route from Idaho to Seattle.

  • What are the most reliable airlines from Idaho to Seattle?

    No one likes to see their flight delayed. When booking a flight from Idaho to Seattle consider choosing Singapore Airlines (96%), WestJet (89%) or Scandinavian Airlines (86%) as they are the most reliable in getting you off to your destination on time.

  • What are the cheapest flights from Idaho to Seattle?

    The cheapest flight price from Idaho to Seattle is $98. On average you can expect to pay $912. The most popular route, (Boise Air Term. Gowen Fld - Seattle/Tacoma Intl), can usually be booked for $117.

  • Can I find deals for flights from Idaho to Seattle that include hotel bookings?

    Yes. In addition to deals on Idaho to Seattle flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Idaho to Seattle?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Idaho to Seattle.

  • Can I find deals for business class flights from Idaho to Seattle?

    Yes. Cheapflights offers flight deals from Idaho to Seattle by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Idaho to Seattle?

    Currently, January is the cheapest month in which you can book a flight from Idaho to Seattle (average of $238). Flying from Idaho to Seattle in June is currently the most expensive (average of $387). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Traveling to a place near Seattle?

Book flights to Seattle if you plan to visit one of these locations
SeaTac
Tukwila
Tacoma
Lakewood
Ocean Shores
Lynnwood
Edmonds
Leavenworth
Renton
Lacey
Olympia
Kent
Federal Way
Cle Elum
Puyallup
Chehalis
Kirkland
Issaquah
Aberdeen
Shoreline

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Top 3 airlines flying from Idaho to Seattle

Discover the top 3 airlines that operate flights from Idaho to Seattle. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated September 16, 2025.
AirlineCheapestAverageFlexibilityOn-time
Hawaiian AirlinesCheapest$117Average$242FlexibilityNo cancel feeOn-time85%
DeltaCheapest$118Average$328FlexibilityNo cancel feeOn-timeN/A
Alaska AirlinesCheapest$137Average$266FlexibilityNo cancel feeOn-time75%

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