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$76+ 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 4/14. Fares are subject to change and may not be available on all flights or dates of travel.
BOI — SEA
Apr 24 — May 11
Fri 4/24
Fri 5/1
1 adult, Economy
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Cheap 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 March 25, 2026.

This Southwest deal was found by Cheapflights users on 3/20. 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 5/62:00 pm
BOI
-
SEA
1 stop5h 30m
Southwest
Wed 5/1311:35 am
SEA
-
BOI
1 stop10h 45m
Southwest
Deal found 3/20$156
This Kiwi.com 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/166:00 am
BOI
-
SEA
Nonstop1h 43m
Hawaiian Airlines
Sun 4/198:27 pm
SEA
-
BOI
Nonstop1h 30m
Hawaiian Airlines
Deal found 3/22$167
This Kiwi.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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/116:00 am
BOI
-
SEA
Nonstop1h 43m
Hawaiian Airlines
Sun 4/121:03 pm
SEA
-
BOI
Nonstop1h 26m
Hawaiian Airlines
Deal found 3/21$168
This CheapOair deal was found by Cheapflights users on 3/20. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/1611:53 am
BOI
-
SEA
1 stop28h 12m
Frontier
Sat 4/187:12 pm
SEA
-
BOI
1 stop14h 56m
Frontier
Deal found 3/20$171
This Alaska Airlines deal was found by Cheapflights users on 3/20. 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 4/156:00 am
BOI
-
SEA
Nonstop1h 43m
Alaska Airlines
Wed 4/157:49 am
SEA
-
BOI
Nonstop1h 32m
Alaska Airlines
Deal found 3/20$172
This Southwest deal was found by Cheapflights users on 3/20. 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 4/145:00 pm
BOI
-
SEA
1 stop6h 55m
Southwest
Mon 4/207:20 am
SEA
-
BOI
1 stop5h 05m
Southwest
Deal found 3/20$174
This Kissandfly.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 Kissandfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/231:52 pm
BOI
-
SEA
Nonstop1h 48m
Alaska Airlines
Thu 4/308:24 pm
SEA
-
BOI
Nonstop1h 38m
Alaska Airlines
Deal found 3/24$175
This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/241:52 pm
BOI
-
SEA
Nonstop1h 48m
Delta
Tue 4/287:50 pm
SEA
-
BOI
Nonstop1h 34m
Delta
Deal found 3/24$177
This Travelocity deal was found by Cheapflights users on 3/20. 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 Travelocity is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/119:55 am
BOI
-
SEA
Nonstop1h 35m
Alaska Airlines
Sat 4/188:27 pm
SEA
-
BOI
Nonstop1h 30m
Alaska Airlines
Deal found 3/20$187
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 4/165:00 am
GEG
-
SEA
Nonstop1h 16m
Hawaiian Airlines
Sun 4/1910:53 pm
SEA
-
GEG
Nonstop1h 06m
Hawaiian Airlines
Deal found 3/24$188
This Trip.com deal was found by Cheapflights users on 3/20. 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.
Sun 4/196:00 am
GEG
-
SEA
Nonstop1h 16m
Alaska Airlines
Sun 4/268:15 pm
SEA
-
GEG
Nonstop1h 16m
Alaska Airlines
Deal found 3/20$189
This Trip.com 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/216:00 am
GEG
-
SEA
Nonstop1h 16m
Alaska Airlines
Tue 4/288:15 pm
SEA
-
GEG
Nonstop1h 16m
Alaska Airlines
Deal found 3/22$191

Find flight deals from Idaho to Seattle

Keep the following information in mind while searching for Idaho to Seattle flight deals. Data was last updated March 25, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$156
(Southwest)

One-way from

$76
(Southwest)

Popular in

June

Cheapest in

January

Average price

$207

Good round-trip deal

$217 or less

Good one-way deal

$143 or less
Provider with most accurate pricing for Boise Air Term. Gowen Fld-Seattle/Tacoma Intl flight deals.
Search Deals
Provider most trusted by Cheapflights users for Boise Air Term. Gowen Fld-Seattle/Tacoma Intl flights.
Search Deals
From Idaho to Seattle/Tacoma Intl
Search Deals
One-way flight from Idaho to Seattle/Tacoma Intl
Search Deals
Highest demand for flights based on searches. 10% potential increase in price ($19 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($5 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 Idaho to Seattle/Tacoma Intl.
Search Deals
Price to beat on a one-way flight from Idaho to Seattle/Tacoma Intl.
Search Deals

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 March 25, 2026.
Use the filters below to find and compare flights from Idaho to Seattle that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

BoiseSeattle

BOI - SEA

BOISEA

Boise Air Term. Gowen Fld

Thu 4/23

6:00 am-6:40 am

Nonstop1h 40m

Seattle/Tacoma Intl

Fri 4/24

9:24 pm-11:59 pm

Nonstop1h 35m

$177

BoiseSeattle

BOI - SEA

BOISEA

Boise Air Term. Gowen Fld

Mon 5/4

5:40 am-6:28 am

Nonstop1h 48m

Seattle/Tacoma Intl

Thu 5/7

7:15 am-9:54 am

Nonstop1h 39m

$177

BoiseSeattle

BOI - SEA

BOISEA

Boise Air Term. Gowen Fld

Wed 4/29

2:57 pm-3:36 pm

Nonstop1h 39m

Seattle/Tacoma Intl

Sat 5/2

4:08 pm-6:34 pm

Nonstop1h 26m

$177

BoiseSeattle

BOI - SEA

BOISEA

Boise Air Term. Gowen Fld

Mon 4/13

7:24 am-8:15 am

Nonstop1h 51m

Seattle/Tacoma Intl

Tue 4/14

7:20 am-10:01 am

Nonstop1h 41m

$177

BoiseSeattle

BOI - SEA

BOISEA

Boise Air Term. Gowen Fld

Thu 5/7

9:16 pm-10:05 pm

Nonstop1h 49m

Seattle/Tacoma Intl

Thu 5/14

5:59 pm-8:34 pm

Nonstop1h 35m

$177

BoiseSeattle

BOI - SEA

BOISEA

Boise Air Term. Gowen Fld

Mon 4/13

4:05 pm-11:27 pm

1 stop8h 22m

Seattle/Tacoma Intl

Tue 4/14

8:42 am-4:48 pm

1 stop7h 06m

$197

SpokaneSeattle

GEG - SEA

GEGSEA

Spokane

Thu 4/30

9:55 am-11:14 am

Nonstop1h 19m

Seattle/Tacoma Intl

Sun 5/3

9:59 pm-11:11 pm

Nonstop1h 12m

$197

SpokaneSeattle

GEG - SEA

GEGSEA

Spokane

Sat 5/2

3:33 pm-5:00 pm

Nonstop1h 27m

Seattle/Tacoma Intl

Sun 5/3

5:42 pm-6:57 pm

Nonstop1h 15m

$197

SpokaneSeattle

GEG - SEA

GEGSEA

Spokane

Thu 4/16

7:38 pm-9:09 pm

Nonstop1h 31m

Seattle/Tacoma Intl

Tue 4/21

9:28 am-10:45 am

Nonstop1h 17m

$197

SpokaneSeattle

GEG - SEA

GEGSEA

Spokane

Fri 4/17

6:15 am-7:36 am

Nonstop1h 21m

Seattle/Tacoma Intl

Tue 4/21

7:50 pm-9:02 pm

Nonstop1h 12m

$197

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/23

Showing 1-10 of 60 resultsSorted by cheapest first
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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, April is the cheapest month in which you can book a flight from Idaho to Seattle (average of $79). Flying from Idaho to Seattle in June is currently the most expensive (average of $137). 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 March 25, 2026.

It’s optimal to fly from Idaho to Seattle in the evening. By choosing this option you can save up to 26% on the cost of your flight, compared to a flight in the morning.

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

Use this chart to determine the cheapest time to fly round-trip from Idaho to Seattle. Price data was last updated on March 23, 2026.

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

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 March 25, 2026.

The most flights from USID to SEA are scheduled on a Wednesday (43 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (25 on average).

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

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 79 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 Idaho to Seattle?

    There are many flights that can get you from Idaho to Seattle in 1h 40m. Fly via Alaska Airlines or Delta to get the fastest option. Airlines will cover a distance of 398 mi. All flights are typically nonstop.

  • 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 $68 on Hawaiian Airlines. Other airlines that offer cheap prices include Alaska Airlines from $69 and Delta from $69 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 Condor (92%), Icelandair (92%) or Air Tahiti Nui (89%) 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 $78. On average you can expect to pay $524. The most popular route, (Boise Air Term. Gowen Fld - Seattle/Tacoma Intl), can usually be booked for $172.

  • 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, April is the cheapest month in which you can book a flight from Idaho to Seattle (average of $79). Flying from Idaho to Seattle in June is currently the most expensive (average of $137). 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
Tacoma
Ocean Shores
Olympia
Kent
Lynnwood
Edmonds
Lacey
Renton
Puyallup
Kirkland
Snoqualmie
Ellensburg
Tukwila
Fife
Lakewood
Leavenworth
Issaquah
Aberdeen
Shoreline

Browse thousands of different options on Cheapflights for your next trip

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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 March 25, 2026.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$97Average$289FlexibilityNo cancel feeOn-timeN/A
Alaska AirlinesCheapest$99Average$265FlexibilityNo cancel feeOn-time75%
Hawaiian AirlinesCheapest$117Average$232FlexibilityNo cancel feeOn-time85%

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