HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Idaho

$58+ 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 9/6. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — BOI
ago. 18 — ago. 251
lun. 8/18
lun. 8/25
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Seattle to Idaho with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

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 agosto 13, 2025.

Round-trip from

$127
(Delta)

One-way from

$58
(iWofly)

Popular in

December

Cheapest in

January

Average price

$197

Good round-trip deal

$157 or less

Good one-way deal

$118 or less
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. 13% potential increase in price ($32 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($7 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in August 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

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 agosto 13, 2025.

This Alaska Airlines deal was found by Cheapflights users on 8/11. 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.
mar. 10/219:30 pmSEA - BOI
Nonstop1h 26mAlaska Airlines
jue. 10/3011:43 amBOI - SEA
Nonstop1h 37mAlaska Airlines
Deal found 8/11$127
This Hawaiian Airlines deal was found by Cheapflights users on 8/11. 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.
sáb. 9/65:20 amSEA - BOI
1 stop3h 00mHawaiian Airlines
sáb. 9/66:59 pmBOI - SEA
1 stop3h 03mHawaiian Airlines
Deal found 8/11$131
This Trip.com deal was found by Cheapflights users on 8/10. 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.
mié. 9/2411:10 pmSEA - GEG
Nonstop1h 09mHawaiian Airlines
mié. 10/15:45 pmGEG - SEA
Nonstop1h 14mHawaiian Airlines
Deal found 8/10$133
This Alaska Airlines deal was found by Cheapflights users on 8/12. 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.
mar. 9/93:42 pmSEA - BOI
1 stop5h 15mAlaska Airlines
mar. 9/164:00 pmBOI - SEA
1 stop5h 35mAlaska Airlines
Deal found 8/12$136
This Delta deal was found by Cheapflights users on 8/12. 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.
vie. 10/241:30 pmSEA - BOI
Nonstop1h 36mDelta
lun. 10/274:46 pmBOI - SEA
Nonstop1h 43mDelta
Deal found 8/12$137
This Delta deal was found by Cheapflights users on 8/12. 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.
mar. 9/99:25 amSEA - GEG
Nonstop1h 09mDelta
mar. 9/167:25 pmGEG - SEA
Nonstop1h 25mDelta
Deal found 8/12$137
This Trip.com deal was found by Cheapflights users on 8/12. 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.
mar. 10/145:40 pmSEA - BOI
1 stop3h 14mHawaiian Airlines
vie. 10/241:35 pmBOI - SEA
Nonstop1h 42mHawaiian Airlines
Deal found 8/12$138
This Kiwi.com deal was found by Cheapflights users on 8/10. 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.
sáb. 9/63:42 pmSEA - GEG
Nonstop1h 09mHawaiian Airlines
dom. 9/77:44 pmGEG - SEA
Nonstop1h 18mHawaiian Airlines
Deal found 8/10$139
This Trip.com deal was found by Cheapflights users on 8/11. 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.
sáb. 9/67:50 amSEA - GEG
Nonstop1h 10mAlaska Airlines
dom. 9/77:44 pmGEG - SEA
Nonstop1h 18mAlaska Airlines
Deal found 8/11$141
This Alaska Airlines deal was found by Cheapflights users on 8/11. 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.
mar. 10/215:40 pmSEA - BOI
1 stop3h 14mAlaska Airlines
vie. 10/246:59 pmBOI - SEA
1 stop4h 11mAlaska Airlines
Deal found 8/11$146
This Hawaiian Airlines deal was found by Cheapflights users on 8/10. 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.
vie. 9/55:42 pmSEA - BOI
1 stop3h 15mHawaiian Airlines
lun. 9/88:00 amBOI - SEA
Nonstop1h 35mHawaiian Airlines
Deal found 8/10$147
This Delta deal was found by Cheapflights users on 8/11. 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.
mié. 9/311:23 amSEA - GEG
Nonstop1h 18mDelta
dom. 9/75:00 amGEG - SEA
Nonstop1h 12mDelta
Deal found 8/11$147

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 agosto 13, 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

vie. 10/10

9:35 pm-12:08 am

Nonstop1h 33m

Boise Air Term. Gowen Fld

sáb. 10/11

5:25 am-6:17 am

Nonstop1h 52m

$127

SeattleBoise

SEA - BOI

SEABOI

Seattle/Tacoma Intl

jue. 10/23

8:45 am-11:09 am

Nonstop1h 24m

Boise Air Term. Gowen Fld

sáb. 10/25

5:38 pm-6:15 pm

Nonstop1h 37m

$127

SeattleBoise

SEA - BOI

SEABOI

Seattle/Tacoma Intl

mié. 9/24

5:42 pm-9:57 pm

1 stop3h 15m

Boise Air Term. Gowen Fld

sáb. 9/27

4:34 pm-5:09 pm

Nonstop1h 35m

$127

SeattleBoise

SEA - BOI

SEABOI

Seattle/Tacoma Intl

mar. 10/7

10:40 am-1:20 pm

Nonstop1h 40m

Boise Air Term. Gowen Fld

jue. 10/16

9:00 am-9:53 am

Nonstop1h 53m

$127

SeattleBoise

SEA - BOI

SEABOI

Seattle/Tacoma Intl

sáb. 10/25

3:45 pm-6:10 pm

Nonstop1h 25m

Boise Air Term. Gowen Fld

dom. 10/26

10:05 am-10:40 am

Nonstop1h 35m

$127

SeattleBoise

SEA - BOI

SEABOI

Seattle/Tacoma Intl

mié. 10/8

8:25 am-11:01 am

Nonstop1h 36m

Boise Air Term. Gowen Fld

lun. 10/13

4:46 pm-5:29 pm

Nonstop1h 43m

$127

SeattleBoise

SEA - BOI

SEABOI

Seattle/Tacoma Intl

vie. 10/24

8:35 pm-11:05 pm

Nonstop1h 30m

Boise Air Term. Gowen Fld

mar. 10/28

11:43 am-12:20 pm

Nonstop1h 37m

$127

SeattleBoise

SEA - BOI

SEABOI

Seattle/Tacoma Intl

mié. 9/24

1:06 pm-3:40 pm

Nonstop1h 34m

Boise Air Term. Gowen Fld

dom. 9/28

11:00 am-11:45 am

Nonstop1h 45m

$127

SeattleBoise

SEA - BOI

SEABOI

Seattle/Tacoma Intl

mié. 10/22

3:45 pm-6:10 pm

Nonstop1h 25m

Boise Air Term. Gowen Fld

lun. 10/27

10:05 am-10:40 am

Nonstop1h 35m

$127

SeattleBoise

SEA - BOI

SEABOI

Seattle/Tacoma Intl

vie. 10/10

9:35 pm-12:08 am

Nonstop1h 33m

Boise Air Term. Gowen Fld

mié. 10/15

7:40 am-8:28 am

Nonstop1h 48m

$127

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/10

Showing 1-10 of 60 results
1
2
3
...
6

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 $399). 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 agosto 13, 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 agosto 13, 2025.

The most flights from SEA to USID are scheduled on a Monday (68 on average). You will have fewer flight options on Sunday, which is when the least amount of flights are scheduled (48 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 agosto 13, 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

Boarding

8.1

Entertainment

7.0

Food

7.1

Comfort

7.8

Overall

8.0

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
Alaska Airlines
8.0
Very good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Entertainment

7.0

Food

7.1

Comfort

7.8

Overall

8.0

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
Delta
8.0
Very good
7,979 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Entertainment

7.0

Food

7.1

Comfort

7.8

Overall

8.0

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
Hawaiian Airlines
7.8
Good
2,651 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Entertainment

7.0

Food

7.1

Comfort

7.8

Overall

8.0

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.

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 14 users in the past month. Keep an eye out for changes in search interest prior to high and low season.

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

    The cheapest airlines for a one-way flight from Seattle to Idaho are Alaska Airlines ($58), Hawaiian Airlines ($88), and Delta ($106).

  • 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 - Idaho Falls Fanning Field or Seattle/Tacoma Intl - Boise Air Term. Gowen Fld as they are the most popular.

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

    Consider Delta (87%), Virgin Atlantic (86%) or KLM (86%) 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 $228, our data indicates the cheapest price to be $88. The most popular route (Seattle/Tacoma Intl - Spokane), is priced around $137.

  • 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 $399). 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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Seattle to Idaho

See prices for flight routes from nearby airports that may be better suited for you.
Seattle to Las Vegas flights
Seattle to Los Angeles flights
Seattle to Dallas/Fort Worth flights
Seattle to Honolulu flights
Seattle to O'Hare Intl flights
Seattle to San Francisco flights
Seattle to San Diego flights
Seattle to John F Kennedy Intl flights
Seattle to Newark flights
Seattle to Ontario flights
Portland to Los Angeles flights
Seattle to Boston flights
Seattle to Sky Harbor Intl flights
Seattle to Santa Ana flights
Seattle to Denver flights
Seattle to Orlando flights
Seattle to LaGuardia flights
Seattle to Minneapolis flights
Everett to Las Vegas flights
Seattle to Kahului flights
Seattle to Hobby flights
Seattle to Reagan-National flights
Seattle to Atlanta flights
Seattle to Detroit flights
Seattle to New Orleans flights
Portland to Dallas/Fort Worth flights
Seattle to San Jose flights
Portland to Honolulu flights
Seattle to Baltimore flights
Seattle to Kailua-Kona flights
Portland to Santa Ana flights
Portland to John F Kennedy Intl flights
Portland to O'Hare Intl flights
Seattle to Dulles Intl flights
Portland to Newark flights
Portland to Las Vegas flights
Seattle to Nashville flights
Portland to Boston flights
Seattle to Salt Lake City flights
Seattle to Philadelphia flights
Seattle to Tampa flights
Portland to Ontario flights
Seattle to Lihue flights
Portland to Sky Harbor Intl flights
Seattle to Love Field flights
Seattle to Palm Springs flights
Portland to Denver flights
Seattle to Miami flights
Seattle to Austin flights
Portland to Orlando flights

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 agosto 13, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$98Average$414FlexibilityNo cancel feeOn-timeN/A
Hawaiian AirlinesCheapest$104Average$242FlexibilityNo cancel feeOn-time85%
Alaska AirlinesCheapest$136Average$319FlexibilityNo cancel feeOn-time75%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.