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$55+ 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 9/20. Fares are subject to change and may not be available on all flights or dates of travel.
BOI — SEA
Aug 4 — Aug 111
Mon 8/4
Mon 8/11
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 July 30, 2025.

Round-trip from

$136
(Alaska Airlines)

One-way from

$55
(iWofly)

Popular in

November

Cheapest in

October

Average price

$217

Good round-trip deal

$177 or less

Good one-way deal

$123 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. 3% potential increase in price ($8 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 July 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 July 30, 2025.

This Alaska Airlines deal was found by Cheapflights users on 7/28. 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 9/66:59 pmBOI - SEA
1 stop3h 03mAlaska Airlines
Tue 9/93:42 pmSEA - BOI
1 stop5h 15mAlaska Airlines
Deal found 7/28$136
This Delta deal was found by Cheapflights users on 7/27. 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 8/237:30 amBOI - SEA
Nonstop1h 42mDelta
Sun 8/318:30 amSEA - BOI
Nonstop1h 34mDelta
Deal found 7/27$137
This Delta deal was found by Cheapflights users on 7/29. 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 8/275:00 amGEG - SEA
Nonstop1h 12mDelta
Wed 9/310:55 pmSEA - GEG
Nonstop1h 07mDelta
Deal found 7/29$137
This Kiwi.com deal was found by Cheapflights users on 7/30. 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 8/238:45 pmGEG - SEA
Nonstop1h 12mHawaiian Airlines
Sun 8/2410:55 pmSEA - GEG
Nonstop1h 04mHawaiian Airlines
Deal found 7/30$138
This KAYAK deal was found by Cheapflights users on 7/28. 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.
Wed 8/275:45 pmBOI - SEA
Nonstop1h 37mHawaiian Airlines
Wed 8/279:31 pmSEA - BOI
Nonstop1h 28mHawaiian Airlines
Deal found 7/28$139
This Southwest deal was found by Cheapflights users on 7/28. 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 8/207:25 amBOI - SEA
1 stop8h 45mSouthwest
Tue 8/266:15 amSEA - BOI
1 stop5h 25mSouthwest
Deal found 7/28$156
This Alaska Airlines deal was found by Cheapflights users on 7/27. 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 11/156:00 amGEG - SEA
2 stops11h 05mAlaska Airlines
Sat 11/158:05 pmSEA - GEG
Nonstop1h 09mAlaska Airlines
Deal found 7/27$156
This Alaska Airlines deal was found by Cheapflights users on 7/29. 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 10/116:00 amIDA - SEA
Nonstop2h 11mAlaska Airlines
Sat 10/187:55 pmSEA - IDA
Nonstop1h 43mAlaska Airlines
Deal found 7/29$177
This FlightHub deal was found by Cheapflights users on 7/30. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/712:22 pmBOI - SEA
1 stop13h 08mFrontier
Wed 9/107:00 amSEA - BOI
1 stop27h 37mFrontier
Deal found 7/30$195
This Delta deal was found by Cheapflights users on 7/29. 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 8/206:52 pmIDA - SEA
1 stop4h 28mDelta
Sat 8/235:30 amSEA - IDA
1 stop4h 09mDelta
Deal found 7/29$196
This Southwest deal was found by Cheapflights users on 7/27. 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 8/266:15 amGEG - SEA
1 stop8h 55mSouthwest
Wed 8/276:15 amSEA - GEG
1 stop7h 55mSouthwest
Deal found 7/27$208
This Delta deal was found by Cheapflights users on 7/28. 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.
Thu 8/287:05 amLWS - SEA
Nonstop1h 24mDelta
Mon 9/17:45 pmSEA - LWS
Nonstop1h 18mDelta
Deal found 7/28$209

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 July 30, 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

Sat 9/6

6:59 pm-9:02 pm

1 stop3h 03m

Seattle/Tacoma Intl

Tue 9/9

3:42 pm-9:57 pm

1 stop5h 15m

$136

BoiseSeattle

BOI - SEA

BOISEA

Boise Air Term. Gowen Fld

Sat 8/23

4:20 pm-5:00 pm

Nonstop1h 40m

Seattle/Tacoma Intl

Mon 8/25

8:30 am-11:04 am

Nonstop1h 34m

$137

SpokaneSeattle

GEG - SEA

GEGSEA

Spokane

Wed 8/27

5:00 am-6:12 am

Nonstop1h 12m

Seattle/Tacoma Intl

Wed 9/3

10:55 pm-12:02 am

Nonstop1h 07m

$137

SpokaneSeattle

GEG - SEA

GEGSEA

Spokane

Sat 8/23

8:45 pm-9:57 pm

Nonstop1h 12m

Seattle/Tacoma Intl

Sun 8/24

10:55 pm-11:59 pm

Nonstop1h 04m

$138

BoiseSeattle

BOI - SEA

BOISEA

Boise Air Term. Gowen Fld

Wed 8/27

5:45 pm-6:22 pm

Nonstop1h 37m

Seattle/Tacoma Intl

Wed 8/27

9:31 pm-11:59 pm

Nonstop1h 28m

$139

SpokaneSeattle

GEG - SEA

GEGSEA

Spokane

Sat 8/30

1:40 pm-2:56 pm

Nonstop1h 16m

Seattle/Tacoma Intl

Sun 8/31

10:55 pm-11:59 pm

Nonstop1h 04m

$147

BoiseSeattle

BOI - SEA

BOISEA

Boise Air Term. Gowen Fld

Wed 8/20

7:25 am-3:10 pm

1 stop8h 45m

Seattle/Tacoma Intl

Tue 8/26

6:15 am-12:40 pm

1 stop5h 25m

$156

Idaho FallsSeattle

IDA - SEA

IDASEA

Idaho Falls Fanning Field

Sat 10/11

6:00 am-7:11 am

Nonstop2h 11m

Seattle/Tacoma Intl

Sat 10/18

7:55 pm-10:38 pm

Nonstop1h 43m

$177

BoiseSeattle

BOI - SEA

BOISEA

Boise Air Term. Gowen Fld

Sun 9/7

12:22 pm-12:30 am

1 stop13h 08m

Seattle/Tacoma Intl

Wed 9/10

7:00 am-11:37 am

1 stop27h 37m

$195

Idaho FallsSeattle

IDA - SEA

IDASEA

Idaho Falls Fanning Field

Wed 8/20

6:52 pm-10:20 pm

1 stop4h 28m

Seattle/Tacoma Intl

Tue 8/26

5:49 pm-10:27 pm

1 stop3h 38m

$196

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/29

Showing 1-10 of 55 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 $389). 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 July 30, 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 July 30, 2025.

The most flights from USID to SEA are scheduled on a Monday (67 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (53 on average).

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

Reviews of airlines servicing Seattle

Get insights into the airlines that provide service to Seattle. 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 Seattle. Reviews last updated July 30, 2025.
Read reviews from past customers who have flown Alaska Airlines, Southwest, and Delta from Idaho to Seattle. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Overall

8.0

Food

7.1

Entertainment

7.1

Boarding

8.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Anonymous,Jul 2025

EUG - SEA

Mobility support was fabulous No flight entertainment that I was aware of.
Alaska Airlines
8.0
Very good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Overall

8.0

Food

7.1

Entertainment

7.1

Boarding

8.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Anonymous,Jul 2025

EUG - SEA

Mobility support was fabulous No flight entertainment that I was aware of.
Southwest
8.0
Very good
4,241 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Overall

8.0

Food

7.1

Entertainment

7.1

Boarding

8.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Anonymous,Jul 2025

EUG - SEA

Mobility support was fabulous No flight entertainment that I was aware of.
Delta
8.0
Very good
7,980 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Overall

8.0

Food

7.1

Entertainment

7.1

Boarding

8.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Anonymous,Jul 2025

EUG - SEA

Mobility support was fabulous No flight entertainment that I was aware of.
Hawaiian Airlines
7.8
Good
2,611 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Overall

8.0

Food

7.1

Entertainment

7.1

Boarding

8.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Anonymous,Jul 2025

EUG - SEA

Mobility support was fabulous No flight entertainment that I was aware of.
United Airlines
7.4
Good
8,896 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Overall

8.0

Food

7.1

Entertainment

7.1

Boarding

8.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Anonymous,Jul 2025

EUG - SEA

Mobility support was fabulous No flight entertainment that I was aware of.

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 78 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 Idaho to Seattle one-way?

    One-way options have recently been found by users for as low as $55 on Alaska Airlines. Other airlines that offer cheap prices include Hawaiian Airlines from $68 and Southwest from $76 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 (100%), Aeromexico (91%) or WestJet (88%) 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 $91. On average you can expect to pay $1,467. 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 $389). 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
Ocean Shores
Lakewood
Lynnwood
Lacey
Leavenworth
Renton
Olympia
Puyallup
Kent
Cle Elum
Chehalis
Kirkland
Issaquah
Aberdeen
Shoreline
Federal Way
Shelton

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Alternative routes for Idaho to Seattle

See prices for flight routes from nearby airports that may be better suited for you.
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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 July 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$117Average$327FlexibilityNo cancel feeOn-timeN/A
Hawaiian AirlinesCheapest$117Average$247FlexibilityNo cancel feeOn-time85%
Alaska AirlinesCheapest$121Average$263FlexibilityNo cancel feeOn-time75%

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