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Idaho

$89+ 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 4/23. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — BOI
Apr 25 — May 21
Sat 4/25
Sat 5/2
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 March 26, 2026.

This Kiwi.com deal was found by Cheapflights users on 3/24. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/161:03 pm
SEA
-
BOI
Nonstop1h 26m
Hawaiian Airlines
Sun 4/196:00 am
BOI
-
SEA
Nonstop1h 43m
Hawaiian Airlines
Deal found 3/24$168
This Trip.com deal was found by Cheapflights users on 3/23. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/147:49 am
SEA
-
BOI
Nonstop1h 32m
Alaska Airlines
Wed 4/227:20 pm
BOI
-
SEA
Nonstop1h 33m
Alaska Airlines
Deal found 3/23$171
This Alaska Airlines deal was found by Cheapflights users on 3/23. 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.
Tue 4/149:53 am
SEA
-
BOI
Nonstop1h 29m
Alaska Airlines
Tue 4/142:22 pm
BOI
-
SEA
Nonstop1h 38m
Alaska Airlines
Deal found 3/23$172
This SmartFares deal was found by Cheapflights users on 3/22. 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 SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/168:15 pm
SEA
-
GEG
Nonstop1h 09m
Hawaiian Airlines
Sun 4/195:00 am
GEG
-
SEA
Nonstop1h 16m
Hawaiian Airlines
Deal found 3/22$172
This Alaska Airlines deal was found by Cheapflights users on 3/24. 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 4/161:03 pm
SEA
-
BOI
Nonstop1h 26m
Alaska Airlines
Sun 4/198:20 am
BOI
-
SEA
Nonstop1h 44m
Alaska Airlines
Deal found 3/24$177
This Alaska Airlines deal was found by Cheapflights users on 3/25. 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 4/2712:55 pm
SEA
-
BOI
Nonstop1h 38m
Alaska Airlines
Tue 4/288:10 am
BOI
-
SEA
Nonstop1h 40m
Alaska Airlines
Deal found 3/25$187
This Trip.com deal was found by Cheapflights users on 3/21. 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 4/259:32 am
SEA
-
GEG
Nonstop1h 06m
Alaska Airlines
Mon 4/275:00 am
GEG
-
SEA
Nonstop1h 11m
Alaska Airlines
Deal found 3/21$192
This Trip.com deal was found by Cheapflights users on 3/25. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/98:15 pm
SEA
-
GEG
Nonstop1h 16m
Alaska Airlines
Sat 5/168:38 pm
GEG
-
SEA
Nonstop1h 11m
Alaska Airlines
Deal found 3/25$193
This Southwest deal was found by Cheapflights users on 3/25. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/189:00 am
SEA
-
BOI
1 stop6h 15m
Southwest
Tue 4/215:15 pm
BOI
-
SEA
1 stop7h 40m
Southwest
Deal found 3/25$197
This Delta deal was found by Cheapflights users on 3/25. 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 4/171:30 pm
SEA
-
GEG
Nonstop1h 19m
Delta
Sun 4/197:15 am
GEG
-
SEA
Nonstop1h 28m
Delta
Deal found 3/25$197
This Southwest deal was found by Cheapflights users on 3/25. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/2811:35 am
SEA
-
BOI
2 stops10h 55m
Southwest
Mon 5/46:55 pm
BOI
-
SEA
1 stop4h 35m
Southwest
Deal found 3/25$202
This Southwest deal was found by Cheapflights users on 3/26. 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 4/2211:35 am
SEA
-
BOI
2 stops10h 55m
Southwest
Sat 4/252:50 pm
BOI
-
SEA
1 stop8h 20m
Southwest
Deal found 3/26$206

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 March 26, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$168
(Kiwi.com)

One-way from

$89
(Delta)

Popular in

December

Cheapest in

January

Average price

$217

Good round-trip deal

$114 or less

Good one-way deal

$118 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
High demand for flights, 10% potential price rise
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($4 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in March 2026
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 March 26, 2026.
Use the filters below to find and compare flights from Seattle to Idaho that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

SeattleBoise

SEA - BOI

SEABOI

Seattle/Tacoma Intl

Wed 5/6

10:36 am-1:12 pm

Nonstop1h 36m

Boise Air Term. Gowen Fld

Mon 5/11

3:14 pm-3:55 pm

Nonstop1h 41m

$177

SeattleBoise

SEA - BOI

SEABOI

Seattle/Tacoma Intl

Sat 4/18

5:23 pm-7:48 pm

Nonstop1h 25m

Boise Air Term. Gowen Fld

Sun 4/19

6:00 am-6:43 am

Nonstop1h 43m

$177

SeattleBoise

SEA - BOI

SEABOI

Seattle/Tacoma Intl

Tue 4/28

10:36 am-1:12 pm

Nonstop1h 36m

Boise Air Term. Gowen Fld

Mon 5/4

8:59 am-9:53 am

Nonstop1h 54m

$177

SeattleBoise

SEA - BOI

SEABOI

Seattle/Tacoma Intl

Wed 5/6

5:35 pm-12:25 am

1 stop5h 50m

Boise Air Term. Gowen Fld

Sat 5/9

4:50 pm-10:00 pm

1 stop6h 10m

$197

SeattleBoise

SEA - BOI

SEABOI

Seattle/Tacoma Intl

Sat 4/18

6:40 am-2:10 pm

1 stop6h 30m

Boise Air Term. Gowen Fld

Tue 4/21

6:00 am-10:55 am

1 stop5h 55m

$197
Quickest round-trip

SeattleSpokane

SEA - GEG

SEAGEG

Seattle/Tacoma Intl

Thu 4/30

9:32 am-10:38 am

Nonstop1h 06m

Spokane

Sat 5/2

7:10 am-8:27 am

Nonstop1h 17m

$197

SeattleSpokane

SEA - GEG

SEAGEG

Seattle/Tacoma Intl

Wed 4/22

8:15 pm-9:31 pm

Nonstop1h 16m

Spokane

Sat 4/25

7:41 pm-8:59 pm

Nonstop1h 18m

$197

SeattleSpokane

SEA - GEG

SEAGEG

Seattle/Tacoma Intl

Fri 4/17

1:30 pm-2:49 pm

Nonstop1h 19m

Spokane

Sun 4/19

7:15 am-8:43 am

Nonstop1h 28m

$197

SeattleBoise

SEA - BOI

SEABOI

Seattle/Tacoma Intl

Tue 4/28

11:35 am-11:30 pm

2 stops10h 55m

Boise Air Term. Gowen Fld

Mon 5/4

6:55 pm-10:30 pm

1 stop4h 35m

$202

SeattleBoise

SEA - BOI

SEABOI

Seattle/Tacoma Intl

Tue 4/28

4:29 pm-10:24 pm

1 stop4h 55m

Boise Air Term. Gowen Fld

Mon 5/4

4:38 pm-5:11 pm

Nonstop1h 33m

$231

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/21

Showing 1-10 of 60 resultsSorted by cheapest first
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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 $79). Flying from Seattle to Idaho in July is currently the most expensive (average of $169). 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 March 26, 2026.

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 at noon, which can drop the price by up to 25% versus a flight in the afternoon.

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 March 23, 2026.

Travelers seeking maximum savings on their Seattle to Idaho flight should consider departing on Saturday at noon 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 March 26, 2026.

The most flights from SEA to USID are scheduled on a Thursday (42 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (24 on average).

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

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 March 26, 2026.
See what other customers who have flown with Alaska Airlines,Delta, andHawaiian 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
7.9
Good
12,119 reviews

Crew

8.5

Overall

7.9

Boarding

8.1

Comfort

7.8

Entertainment

7.0

Food

7.0

Reviews

1 / 20
4.0
Okay

Anonymous,Dec 2025

SEA - MSY

I really got a lesson in upgrades. I let my seat get chosen . Both times a middle seat...on purpose ...even when we were not full. That's petty I sat behind the first class . They got more than 1 drink ...and a snack . .and the staff actually talked to them...behind a see thru shawl/sheet in the aisle....... You could see over the seats just fine and you could hear the voices just fine. But the sheet let You KNOW. Your not welcome here. For a moment I regretted not spending 300 dollars per seat so I could see a smile and eat a sandwhich and enjoy my seat . The married couple drank champain and laughed and flirted with each other. It looked so happy and care free MONEY really does buy happiness ..the hateful glares and sighs from my seat mates brought me back to reality I wasn't rich and I still had 2 hours left in this middle seat.
Alaska Airlines
7.9
Good
12,119 reviews
Alaska Airlines
7.9
Good
12,119 reviews

Crew

8.5

Overall

7.9

Boarding

8.1

Comfort

7.8

Entertainment

7.0

Food

7.0

Reviews

1 / 20
4.0
Okay

Anonymous,Dec 2025

SEA - MSY

I really got a lesson in upgrades. I let my seat get chosen . Both times a middle seat...on purpose ...even when we were not full. That's petty I sat behind the first class . They got more than 1 drink ...and a snack . .and the staff actually talked to them...behind a see thru shawl/sheet in the aisle....... You could see over the seats just fine and you could hear the voices just fine. But the sheet let You KNOW. Your not welcome here. For a moment I regretted not spending 300 dollars per seat so I could see a smile and eat a sandwhich and enjoy my seat . The married couple drank champain and laughed and flirted with each other. It looked so happy and care free MONEY really does buy happiness ..the hateful glares and sighs from my seat mates brought me back to reality I wasn't rich and I still had 2 hours left in this middle seat.
Delta
7.9
Good
8,336 reviews
Alaska Airlines
7.9
Good
12,119 reviews

Crew

8.5

Overall

7.9

Boarding

8.1

Comfort

7.8

Entertainment

7.0

Food

7.0

Reviews

1 / 20
4.0
Okay

Anonymous,Dec 2025

SEA - MSY

I really got a lesson in upgrades. I let my seat get chosen . Both times a middle seat...on purpose ...even when we were not full. That's petty I sat behind the first class . They got more than 1 drink ...and a snack . .and the staff actually talked to them...behind a see thru shawl/sheet in the aisle....... You could see over the seats just fine and you could hear the voices just fine. But the sheet let You KNOW. Your not welcome here. For a moment I regretted not spending 300 dollars per seat so I could see a smile and eat a sandwhich and enjoy my seat . The married couple drank champain and laughed and flirted with each other. It looked so happy and care free MONEY really does buy happiness ..the hateful glares and sighs from my seat mates brought me back to reality I wasn't rich and I still had 2 hours left in this middle seat.
Hawaiian Airlines
7.8
Good
2,839 reviews
Alaska Airlines
7.9
Good
12,119 reviews

Crew

8.5

Overall

7.9

Boarding

8.1

Comfort

7.8

Entertainment

7.0

Food

7.0

Reviews

1 / 20
4.0
Okay

Anonymous,Dec 2025

SEA - MSY

I really got a lesson in upgrades. I let my seat get chosen . Both times a middle seat...on purpose ...even when we were not full. That's petty I sat behind the first class . They got more than 1 drink ...and a snack . .and the staff actually talked to them...behind a see thru shawl/sheet in the aisle....... You could see over the seats just fine and you could hear the voices just fine. But the sheet let You KNOW. Your not welcome here. For a moment I regretted not spending 300 dollars per seat so I could see a smile and eat a sandwhich and enjoy my seat . The married couple drank champain and laughed and flirted with each other. It looked so happy and care free MONEY really does buy happiness ..the hateful glares and sighs from my seat mates brought me back to reality I wasn't rich and I still had 2 hours left in this middle seat.

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 36m. Delta provides one of the quickest options available for as low as $177. The distance from Seattle to Idaho is about 398 mi. This flight may include one or multiple stops.

  • 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 Hawaiian Airlines ($58), Alaska Airlines ($69), and Delta ($69).

  • 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 - Jackson Hole as they are the most popular.

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

    Consider Horizon Air (93%), Japan Airlines (92%) or Alaska Airlines (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 $159, our data indicates the cheapest price to be $68. The most popular route (Seattle/Tacoma Intl - Boise Air Term. Gowen Fld), is priced around $177.

  • 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 $79). Flying from Seattle to Idaho in July is currently the most expensive (average of $169). 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 March 26, 2026.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$79Average$367FlexibilityNo cancel feeOn-timeN/A
Alaska AirlinesCheapest$111Average$278FlexibilityNo cancel feeOn-time75%
Hawaiian AirlinesCheapest$127Average$257FlexibilityNo cancel feeOn-time85%

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