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Idaho

$56+ Cheap flights from Seattle (SEA) to Idaho

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 10/28. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — BOI
Oct 25 — Nov 11
Sat 10/25
Sat 11/1
1 adult, Economy
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Cheap flight deals from Seattle to Idaho

Keep the following information in mind while searching for Seattle to Idaho flight deals. Data was last updated September 25, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$137
(Delta)

One-way from

$56
(Jettzy)

Popular in

September

Cheapest in

January

Average price

$327

Good round-trip deal

$165 or less

Good one-way deal

$143 or less
Provider with most accurate pricing for Seattle/Tacoma Intl-Boise Air Term. Gowen Fld flight deals.
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Provider most trusted by Cheapflights users for Seattle/Tacoma Intl-Boise Air Term. Gowen Fld flights.
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From Seattle/Tacoma Intl to Idaho
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One-way flight from Seattle/Tacoma Intl to Idaho
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Highest demand for flights based on searches. 7% potential increase in price ($17 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($10 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 Seattle/Tacoma Intl to Idaho.
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Price to beat on a one-way flight from Seattle/Tacoma Intl to Idaho.
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Find flight deals from Seattle to Idaho

Cheapest flights from Seattle to Idaho
Explore the most affordable flight options available from Seattle to Idaho. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 25, 2025.

This Delta deal was found by Cheapflights users on 9/25. 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.
Fri 10/249:35 pmSEA - BOI
Nonstop1h 33mDelta
Sun 10/269:00 amBOI - SEA
Nonstop1h 53mDelta
Deal found 9/25$137
This Trip.com deal was found by Cheapflights users on 9/22. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/2512:00 pmSEA - BOI
Nonstop1h 36mAlaska Airlines
Tue 10/287:30 amBOI - SEA
1 stop3h 37mAlaska Airlines
Deal found 9/22$138
This Alaska Airlines deal was found by Cheapflights users on 9/24. 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 10/1812:00 pmSEA - BOI
Nonstop1h 36mAlaska Airlines
Mon 10/206:59 pmBOI - SEA
1 stop4h 11mAlaska Airlines
Deal found 9/24$139
This Southwest deal was found by Cheapflights users on 9/24. 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 10/2810:10 amSEA - BOI
1 stop4h 25mSouthwest
Tue 11/412:55 pmBOI - SEA
2 stops9h 55mSouthwest
Deal found 9/24$142
This Southwest deal was found by Cheapflights users on 9/22. 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.
Sat 10/255:00 amSEA - BOI
1 stop8h 05mSouthwest
Wed 10/295:30 pmBOI - SEA
1 stop6h 15mSouthwest
Deal found 9/22$144
This Southwest deal was found by Cheapflights users on 9/23. 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 10/296:55 amSEA - BOI
2 stops10h 50mSouthwest
Wed 11/512:55 pmBOI - SEA
2 stops9h 55mSouthwest
Deal found 9/23$147
This Southwest deal was found by Cheapflights users on 9/23. 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.
Mon 11/106:45 pmSEA - BOI
1 stop5h 00mSouthwest
Wed 11/121:25 pmBOI - SEA
2 stops8h 15mSouthwest
Deal found 9/23$149
This Alaska Airlines deal was found by Cheapflights users on 9/25. 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.
Mon 11/31:53 pmSEA - GEG
1 stop5h 01mAlaska Airlines
Wed 11/57:39 pmGEG - SEA
Nonstop1h 16mAlaska Airlines
Deal found 9/25$149
This Cheapflightsfares deal was found by Cheapflights users on 9/23. 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.
Sat 10/255:21 amSEA - BOI
1 stop2h 53mAlaska Airlines
Fri 11/76:05 pmBOI - SEA
Nonstop1h 40mAlaska Airlines
Deal found 9/23$150
This SmartFares deal was found by Cheapflights users on 9/24. 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 SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/185:21 amSEA - GEG
1 stop2h 44mAlaska Airlines
Sun 10/197:34 pmGEG - SEA
Nonstop1h 16mAlaska Airlines
Deal found 9/24$150
This Southwest deal was found by Cheapflights users on 9/23. 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.
Thu 10/166:30 amSEA - BOI
1 stop4h 30mSouthwest
Sat 10/1811:40 amBOI - SEA
1 stop5h 15mSouthwest
Deal found 9/23$151
This Alaska Airlines deal was found by Cheapflights users on 9/23. 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 10/187:15 amSEA - GEG
Nonstop1h 05mAlaska Airlines
Sat 10/1811:46 amGEG - SEA
Nonstop1h 19mAlaska Airlines
Deal found 9/23$151

Cheapflights Fare Finder

 
Customize your flight search to find flights from Seattle to Idaho 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 25, 2025.
Use the filters below to find and compare flights from Seattle to Idaho that are best for you.

Fly from

Seattle

Fly to

Idaho

Route

Depart

Return

Price

SeattleBoise

SEA - BOI

SEABOI

Seattle/Tacoma Intl

Thu 11/13

5:50 pm-8:24 pm

Nonstop1h 34m

Boise Air Term. Gowen Fld

Sun 11/16

11:42 am-12:35 pm

Nonstop1h 53m

$137

SeattleBoise

SEA - BOI

SEABOI

Seattle/Tacoma Intl

Thu 10/23

9:30 pm-11:56 pm

Nonstop1h 26m

Boise Air Term. Gowen Fld

Thu 10/30

4:57 pm-5:40 pm

Nonstop1h 43m

$137

SeattleBoise

SEA - BOI

SEABOI

Seattle/Tacoma Intl

Mon 11/24

9:17 pm-11:39 pm

Nonstop1h 22m

Boise Air Term. Gowen Fld

Mon 12/1

9:42 pm-10:23 pm

Nonstop1h 41m

$137

SeattleBoise

SEA - BOI

SEABOI

Seattle/Tacoma Intl

Fri 10/24

1:30 pm-4:06 pm

Nonstop1h 36m

Boise Air Term. Gowen Fld

Sun 10/26

9:00 am-9:53 am

Nonstop1h 53m

$137

SeattleBoise

SEA - BOI

SEABOI

Seattle/Tacoma Intl

Fri 1/2

7:45 pm-10:17 pm

Nonstop1h 32m

Boise Air Term. Gowen Fld

Sat 1/3

6:08 pm-7:00 pm

Nonstop1h 52m

$137

SeattleBoise

SEA - BOI

SEABOI

Seattle/Tacoma Intl

Thu 10/23

8:45 am-11:09 am

Nonstop1h 24m

Boise Air Term. Gowen Fld

Mon 10/27

10:05 am-10:40 am

Nonstop1h 35m

$137

SeattleBoise

SEA - BOI

SEABOI

Seattle/Tacoma Intl

Thu 10/16

9:35 pm-12:08 am

Nonstop1h 33m

Boise Air Term. Gowen Fld

Sun 10/19

7:40 am-8:28 am

Nonstop1h 48m

$137

SeattleBoise

SEA - BOI

SEABOI

Seattle/Tacoma Intl

Fri 10/24

9:35 pm-12:08 am

Nonstop1h 33m

Boise Air Term. Gowen Fld

Mon 10/27

9:00 am-9:53 am

Nonstop1h 53m

$137

SeattleBoise

SEA - BOI

SEABOI

Seattle/Tacoma Intl

Fri 1/2

9:35 pm-12:05 am

Nonstop1h 30m

Boise Air Term. Gowen Fld

Sun 1/4

5:42 am-6:40 am

Nonstop1h 58m

$137

SeattleSpokane

SEA - GEG

SEAGEG

Seattle/Tacoma Intl

Mon 11/3

1:53 pm-6:54 pm

1 stop5h 01m

Spokane

Wed 11/5

8:59 pm-10:10 pm

Nonstop1h 11m

$149

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/25

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

Have a flexible travel schedule? Discover the best time to fly to Idaho from Seattle 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 Seattle to Idaho

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

Currently, October is the cheapest month in which you can book a flight from Seattle to Idaho (average of $314). Flying from Seattle to Idaho in June is currently the most expensive (average of $398). 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 SEA to ID?

Find hourly flight availability from Seattle to Idaho. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated September 25, 2025.

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

Weekly flight availability from Seattle to Idaho

Explore weekly flight availability from Seattle to Idaho. 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 25, 2025.

The most flights from SEA to USID are scheduled on a Monday (65 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (50 on average).

Reviews of airlines servicing Idaho

Get insights into the airlines that provide service to Idaho. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Idaho. Reviews last updated September 25, 2025.
See what other customers who have flown with Alaska Airlines, Delta, and Hawaiian Airlines from Seattle to Idaho have to say. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Entertainment

7.0

Boarding

8.1

Overall

8.0

Crew

8.5

Food

7.1

Reviews

1 / 20
8.0
Excellent

Anonymous,Sep 2025

SEA - MKE

The crew were excellent, flight good, but the actual space for a person to occupy for 4 hours seems to get smaller and smaller 🤣. I am not overweight, and average height….very uncomfortable,, especially when I couldn’t recliner the seat at all, and the pocket in front doesn’t accommodate a water bottle.
Alaska Airlines
8.0
Very good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Entertainment

7.0

Boarding

8.1

Overall

8.0

Crew

8.5

Food

7.1

Reviews

1 / 20
8.0
Excellent

Anonymous,Sep 2025

SEA - MKE

The crew were excellent, flight good, but the actual space for a person to occupy for 4 hours seems to get smaller and smaller 🤣. I am not overweight, and average height….very uncomfortable,, especially when I couldn’t recliner the seat at all, and the pocket in front doesn’t accommodate a water bottle.
Delta
8.0
Very good
7,973 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Entertainment

7.0

Boarding

8.1

Overall

8.0

Crew

8.5

Food

7.1

Reviews

1 / 20
8.0
Excellent

Anonymous,Sep 2025

SEA - MKE

The crew were excellent, flight good, but the actual space for a person to occupy for 4 hours seems to get smaller and smaller 🤣. I am not overweight, and average height….very uncomfortable,, especially when I couldn’t recliner the seat at all, and the pocket in front doesn’t accommodate a water bottle.
Hawaiian Airlines
7.8
Good
2,750 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Entertainment

7.0

Boarding

8.1

Overall

8.0

Crew

8.5

Food

7.1

Reviews

1 / 20
8.0
Excellent

Anonymous,Sep 2025

SEA - MKE

The crew were excellent, flight good, but the actual space for a person to occupy for 4 hours seems to get smaller and smaller 🤣. I am not overweight, and average height….very uncomfortable,, especially when I couldn’t recliner the seat at all, and the pocket in front doesn’t accommodate a water bottle.

Related info for your journey

Find useful and relevant information for your journey from Seattle to Idaho. 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 from for flights from Seattle to Idaho?

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

  • How popular is this Seattle to Idaho flight route?

    This flight path from Seattle/Tacoma Intl to Idaho was viewed by 13 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 Seattle to Idaho?

    A quick flight from Seattle to Idaho can take about 1h 26m. Delta provides one of the quickest options available for as low as $137. The distance from Seattle to Idaho is about 398 mi. This flight may include one or multiple stops.

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

    When deciding which route to take from Seattle to Idaho consider Seattle/Tacoma Intl - Boise Air Term. Gowen Fld, Seattle/Tacoma Intl - Spokane or Seattle/Tacoma Intl - Idaho Falls Fanning Field as they are the most popular.

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

    Consider Air France (94%), Delta (89%) or KLM (87%) when booking your flight. These represent the most reliable airlines when flying from Seattle to Idaho.

  • What are the cheapest flights from Seattle to Idaho?

    Looking for the cheapest flight from Seattle to Idaho? While on average our users pay $268, our data indicates the cheapest price to be $78. The most popular route (Seattle/Tacoma Intl - Boise Air Term. Gowen Fld), is priced around $86.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Seattle to Idaho 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 Seattle to Idaho?

    Currently, October is the cheapest month in which you can book a flight from Seattle to Idaho (average of $314). Flying from Seattle to Idaho in June is currently the most expensive (average of $398). 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.

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Alternative routes for Seattle to Idaho

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Top 3 airlines flying from Seattle to Idaho

Discover the top 3 airlines that operate flights from Seattle to Idaho. 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 25, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$98Average$414FlexibilityNo cancel feeOn-timeN/A
Hawaiian AirlinesCheapest$117Average$280FlexibilityNo cancel feeOn-time85%
Alaska AirlinesCheapest$137Average$310FlexibilityNo cancel feeOn-time75%

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