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Idaho

$59+ 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 2/21. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — BOI
Jan 25 — Feb 11
Sun 1/25
Sun 2/1
1 adult, Economy
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Cheap 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 December 26, 2025.

This Delta deal was found by Cheapflights users on 12/24. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/247:35 pmSEA - LWS
Nonstop1h 17mDelta
Wed 1/2812:24 pmLWS - SEA
1 stop6h 05mDelta
Deal found 12/24$299
This Delta deal was found by Cheapflights users on 12/24. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/247:35 pmSEA - LWS
Nonstop1h 17mDelta
Fri 12/267:15 amLWS - SEA
Nonstop1h 32mDelta
Deal found 12/24$389
This Alaska Airlines deal was found by Cheapflights users on 12/23. 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.
Wed 12/313:43 pmSEA - BOI
Nonstop1h 22mAlaska Airlines
Sat 1/310:47 amBOI - SEA
Nonstop1h 43mAlaska Airlines
Deal found 12/23$397
This Alaska Airlines deal was found by Cheapflights users on 12/24. 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.
Thu 12/259:57 amSEA - BOI
1 stop6h 04mAlaska Airlines
Fri 1/24:16 pmBOI - SEA
1 stop5h 17mAlaska Airlines
Deal found 12/24$456
This United Airlines deal was found by Cheapflights users on 12/23. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/3112:44 pmSEA - JAC
1 stop7h 08mUnited Airlines
Wed 1/73:27 pmJAC - SEA
1 stop6h 45mUnited Airlines
Deal found 12/23$476
This Delta deal was found by Cheapflights users on 12/23. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/299:35 pmSEA - BOI
Nonstop1h 29mDelta
Wed 12/317:30 amBOI - SEA
Nonstop1h 54mDelta
Deal found 12/23$477
This Delta deal was found by Cheapflights users on 12/25. 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.
Tue 12/307:10 amSEA - GEG
Nonstop1h 21mDelta
Thu 1/13:32 pmGEG - SEA
Nonstop1h 28mDelta
Deal found 12/25$482
This Alaska Airlines deal was found by Cheapflights users on 12/24. 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.
Wed 12/243:43 pmSEA - BOI
Nonstop1h 22mAlaska Airlines
Fri 12/261:00 pmBOI - SEA
Nonstop1h 43mAlaska Airlines
Deal found 12/24$497
This Southwest deal was found by Cheapflights users on 12/24. 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.
Thu 12/258:10 amSEA - BOI
2 stops8h 00mSouthwest
Fri 1/27:15 pmBOI - SEA
1 stop4h 45mSouthwest
Deal found 12/24$502
This Alaska Airlines deal was found by Cheapflights users on 12/25. 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.
Tue 12/309:45 amSEA - GEG
Nonstop1h 11mAlaska Airlines
Sun 1/47:00 amGEG - SEA
Nonstop1h 24mAlaska Airlines
Deal found 12/25$512
This Alaska Airlines deal was found by Cheapflights users on 12/24. 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.
Wed 12/243:49 pmSEA - BOI
1 stop5h 18mAlaska Airlines
Sat 12/277:07 amBOI - SEA
1 stop3h 08mAlaska Airlines
Deal found 12/24$516
This Southwest deal was found by Cheapflights users on 12/24. 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.
Wed 12/243:05 pmSEA - BOI
1 stop6h 20mSouthwest
Fri 12/267:55 pmBOI - SEA
1 stop4h 45mSouthwest
Deal found 12/24$517

Find flight deals from Seattle to Idaho

Keep the following information in mind while searching for Seattle to Idaho flight deals. Data was last updated December 26, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$89
(Kiwi.com)

One-way from

$59
(Kiwi.com)

Popular in

December

Cheapest in

January

Average price

$274

Good round-trip deal

$150 or less

Good one-way deal

$128 or less
Provider with most accurate pricing for Seattle/Tacoma Intl-Boise Air Term. Gowen Fld flight deals.
Search Deals
Provider most trusted by Cheapflights users for Seattle/Tacoma Intl-Boise Air Term. Gowen Fld flights.
Search Deals
From Seattle/Tacoma Intl to Idaho
Search Deals
One-way flight from Seattle/Tacoma Intl to Idaho
Search Deals
Highest demand for flights based on searches. 1% potential increase in price ($3 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($6 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
Search Deals
Price to beat on a round-trip flight from Seattle/Tacoma Intl to Idaho.
Search Deals
Price to beat on a one-way flight from Seattle/Tacoma Intl to Idaho.
Search Deals

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 December 26, 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 1/15

7:30 pm-9:58 pm

Nonstop1h 28m

Boise Air Term. Gowen Fld

Sun 1/18

5:40 am-6:36 am

Nonstop1h 56m

$99

SeattleBoise

SEA - BOI

SEABOI

Seattle/Tacoma Intl

Thu 1/29

12:43 pm-3:10 pm

Nonstop1h 27m

Boise Air Term. Gowen Fld

Mon 2/2

6:23 am-7:15 am

Nonstop1h 52m

$99

SeattleBoise

SEA - BOI

SEABOI

Seattle/Tacoma Intl

Sat 1/17

3:59 pm-6:28 pm

Nonstop1h 29m

Boise Air Term. Gowen Fld

Sat 1/24

5:15 pm-6:08 pm

Nonstop1h 53m

$99

SeattleSpokane

SEA - GEG

SEAGEG

Seattle/Tacoma Intl

Wed 1/21

9:59 am-11:12 am

Nonstop1h 13m

Spokane

Sat 1/24

7:49 pm-9:06 pm

Nonstop1h 17m

$99

SeattleBoise

SEA - BOI

SEABOI

Seattle/Tacoma Intl

Fri 1/23

9:30 pm-11:59 pm

Nonstop1h 29m

Boise Air Term. Gowen Fld

Fri 1/30

1:40 pm-2:36 pm

Nonstop1h 56m

$99

SeattleBoise

SEA - BOI

SEABOI

Seattle/Tacoma Intl

Fri 1/30

7:30 pm-9:58 pm

Nonstop1h 28m

Boise Air Term. Gowen Fld

Sun 2/1

7:15 pm-8:13 pm

Nonstop1h 58m

$99

SeattleBoise

SEA - BOI

SEABOI

Seattle/Tacoma Intl

Fri 1/23

9:30 pm-11:59 pm

Nonstop1h 29m

Boise Air Term. Gowen Fld

Mon 1/26

1:40 pm-2:36 pm

Nonstop1h 56m

$99

SeattleBoise

SEA - BOI

SEABOI

Seattle/Tacoma Intl

Thu 1/22

9:30 pm-11:59 pm

Nonstop1h 29m

Boise Air Term. Gowen Fld

Thu 2/5

5:40 am-6:36 am

Nonstop1h 56m

$99

SeattleBoise

SEA - BOI

SEABOI

Seattle/Tacoma Intl

Wed 1/21

7:20 am-9:57 am

Nonstop1h 37m

Boise Air Term. Gowen Fld

Sat 1/24

10:39 am-11:35 am

Nonstop1h 56m

$99

SeattleSpokane

SEA - GEG

SEAGEG

Seattle/Tacoma Intl

Fri 2/20

9:35 pm-10:50 pm

Nonstop1h 15m

Spokane

Sun 2/22

5:00 am-6:25 am

Nonstop1h 25m

$99

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/23

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, January is the cheapest month in which you can book a flight from Seattle to Idaho (average of $77). Flying from Seattle to Idaho in July is currently the most expensive (average of $175). 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 December 26, 2025.

When flying from Seattle to Idaho, the time of day you fly usually plays a role in the price. Save by searching for a flight in the evening, which can drop the price by up to 25% versus a flight in the morning.

What is the cheapest day to fly from Seattle to Idaho?

Use this chart to determine the cheapest time to fly round-trip from Seattle to Idaho. Price data was last updated on December 20, 2025.

Travelers seeking maximum savings on their Seattle to Idaho flight should consider departing on Friday afternoons when fares are most often at their lowest. Sunday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.

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 December 26, 2025.

The most flights from SEA to USID are scheduled on a Friday (55 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (42 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 December 26, 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
11,537 reviews

Crew

8.5

Boarding

8.1

Entertainment

7.0

Comfort

7.8

Food

7.1

Overall

8.0

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
11,537 reviews
Alaska Airlines
8.0
Very good
11,537 reviews

Crew

8.5

Boarding

8.1

Entertainment

7.0

Comfort

7.8

Food

7.1

Overall

8.0

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
7.9
Good
8,015 reviews
Alaska Airlines
8.0
Very good
11,537 reviews

Crew

8.5

Boarding

8.1

Entertainment

7.0

Comfort

7.8

Food

7.1

Overall

8.0

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
2,820 reviews
Alaska Airlines
8.0
Very good
11,537 reviews

Crew

8.5

Boarding

8.1

Entertainment

7.0

Comfort

7.8

Food

7.1

Overall

8.0

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 8 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 27m. Delta provides one of the quickest options available for as low as $99. The distance from Seattle to Idaho is about 398 mi. All flights are typically nonstop.

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

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

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

    Consider WestJet (97%), Japan Airlines (93%) or KLM (90%) 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 $270, our data indicates the cheapest price to be $59. The most popular route (Seattle/Tacoma Intl - Spokane), is priced around $99.

  • 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, January is the cheapest month in which you can book a flight from Seattle to Idaho (average of $77). Flying from Seattle to Idaho in July is currently the most expensive (average of $175). 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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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 December 26, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$99Average$403FlexibilityNo cancel feeOn-timeN/A
Alaska AirlinesCheapest$115Average$285FlexibilityNo cancel feeOn-time75%
Hawaiian AirlinesCheapest$117Average$280FlexibilityNo cancel feeOn-time85%

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