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$109+ Cheap flights from Idaho Falls to Seattle (IDA - 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 2/12. Fares are subject to change and may not be available on all flights or dates of travel.
IDA — SEA
Jan 27 — Feb 31
Tue 1/27
Tue 2/3
1 adult, Economy
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Find cheap flights from Idaho Falls to Seattle with Cheapflights

1. Tell us where you want to go

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Cheapflights Tip: The best prices from Idaho Falls Fanning Field to Seattle/Tacoma Intl are usually found in April or February, booked 69 days in advance, depart on a Thursday or Friday and return on a Wednesday

Cheap flight deals from Idaho Falls to Seattle

Cheapest flights from Idaho Falls to Seattle
Explore the most affordable flight options available from Idaho Falls to Seattle. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 28, 2025.

This Delta deal was found by Cheapflights users on 12/27. 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 12/276:57 pmIDA - SEA
1 stop5h 28mDelta
Wed 1/75:25 amSEA - IDA
1 stop6h 09mDelta
Deal found 12/27$598
This Alaska Airlines deal was found by Cheapflights users on 12/26. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/266:00 amIDA - SEA
Nonstop2h 20mAlaska Airlines
Sat 1/311:42 amSEA - IDA
Nonstop1h 50mAlaska Airlines
Deal found 12/26$618
This Kiwi.com deal was found by Cheapflights users on 12/27. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/296:00 amIDA - SEA
Nonstop2h 20mAlaska Airlines
Fri 1/211:20 amSEA - IDA
Nonstop1h 46mAlaska Airlines
Deal found 12/27$657
This Alaska Airlines deal was found by Cheapflights users on 12/26. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/306:00 amIDA - SEA
Nonstop2h 20mAlaska Airlines
Thu 1/111:20 amSEA - IDA
Nonstop1h 46mAlaska Airlines
Deal found 12/26$658
This Delta deal was found by Cheapflights users on 12/26. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/266:57 pmIDA - SEA
1 stop6h 23mDelta
Sat 1/35:25 amSEA - IDA
1 stop6h 02mDelta
Deal found 12/26$668
This Delta deal was found by Cheapflights users on 12/26. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/276:57 pmIDA - SEA
1 stop5h 28mDelta
Tue 12/301:35 pmSEA - IDA
1 stop3h 42mDelta
Deal found 12/26$678
This WAYA deal was found by Cheapflights users on 12/27. 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 WAYA is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/291:26 pmIDA - SEA
1 stop6h 03mMultiple Airlines
Fri 1/29:21 pmSEA - IDA
Nonstop1h 46mMultiple Airlines
Deal found 12/27$698
This Expedia deal was found by Cheapflights users on 12/26. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/276:00 amIDA - SEA
Nonstop2h 20mAlaska Airlines
Tue 12/309:21 pmSEA - IDA
Nonstop1h 46mAlaska Airlines
Deal found 12/26$718
This WAYA deal was found by Cheapflights users on 12/27. 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 WAYA is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/316:00 amIDA - SEA
Nonstop2h 20mMultiple Airlines
Fri 1/25:20 amSEA - IDA
1 stop6h 16mMultiple Airlines
Deal found 12/27$733
This Alaska Airlines deal was found by Cheapflights users on 12/27. 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 12/276:00 amIDA - SEA
Nonstop2h 20mAlaska Airlines
Wed 1/78:16 pmSEA - IDA
Nonstop1h 43mAlaska Airlines
Deal found 12/27$808
This United Airlines deal was found by Cheapflights users on 12/26. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/3010:45 amIDA - SEA
1 stop24h 11mUnited Airlines
Thu 1/13:50 pmSEA - IDA
1 stop20h 40mUnited Airlines
Deal found 12/26$890

Find flight deals from Idaho Falls to Seattle

Discover tips and strategies to find the most affordable flight options for your journey from Idaho Falls (IDA) to Seattle (SEA). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated December 28, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$197
(Alaska Airlines)

One-way from

$109
(Delta)

Popular in

January

Cheapest in

April

Average price

$338

Good round-trip deal

$299 or less

Good one-way deal

$178 or less
Provider with most accurate pricing for Idaho Falls Fanning Field-Seattle/Tacoma Intl flight deals.
Search Deals
Provider most trusted by Cheapflights users for Idaho Falls Fanning Field-Seattle/Tacoma Intl flights.
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From Idaho Falls Fanning Field to Seattle/Tacoma Intl
Search Deals
One-way flight from Idaho Falls Fanning Field to Seattle/Tacoma Intl
Search Deals
Highest demand for flights based on searches. 1% potential increase in price ($4 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% 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 Idaho Falls Fanning Field to Seattle/Tacoma Intl.
Search Deals
Price to beat on a one-way flight from Idaho Falls Fanning Field to Seattle/Tacoma Intl.
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Idaho Falls 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 December 28, 2025.
Use the filters below to find and compare flights from Idaho Falls to Seattle that are best for you.

Fly from

Idaho Falls

Fly to

Seattle

Route

Depart

Return

Price

Idaho FallsSeattle

IDA - SEA

IDASEA

Idaho Falls Fanning Field

Fri 1/23

6:58 pm-8:00 pm

Nonstop2h 02m

Seattle/Tacoma Intl

Mon 1/26

3:35 pm-6:18 pm

Nonstop1h 43m

$197

Idaho FallsSeattle

IDA - SEA

IDASEA

Idaho Falls Fanning Field

Fri 2/6

6:58 pm-8:00 pm

Nonstop2h 02m

Seattle/Tacoma Intl

Mon 2/9

8:16 pm-10:59 pm

Nonstop1h 43m

$197

Idaho FallsSeattle

IDA - SEA

IDASEA

Idaho Falls Fanning Field

Fri 1/30

6:58 pm-8:00 pm

Nonstop2h 02m

Seattle/Tacoma Intl

Sun 2/1

8:16 pm-10:59 pm

Nonstop1h 43m

$197

Idaho FallsSeattle

IDA - SEA

IDASEA

Idaho Falls Fanning Field

Sat 2/7

9:00 am-10:10 am

Nonstop2h 10m

Seattle/Tacoma Intl

Sat 2/7

3:35 pm-6:18 pm

Nonstop1h 43m

$217

Idaho FallsSeattle

IDA - SEA

IDASEA

Idaho Falls Fanning Field

Sat 1/31

9:00 am-10:10 am

Nonstop2h 10m

Seattle/Tacoma Intl

Sat 1/31

3:35 pm-6:18 pm

Nonstop1h 43m

$217

Idaho FallsSeattle

IDA - SEA

IDASEA

Idaho Falls Fanning Field

Fri 2/13

8:00 am-9:07 am

Nonstop2h 07m

Seattle/Tacoma Intl

Sun 2/15

8:52 pm-11:36 pm

Nonstop1h 44m

$228

Idaho FallsSeattle

IDA - SEA

IDASEA

Idaho Falls Fanning Field

Tue 2/3

6:35 pm-12:09 am

1 stop6h 34m

Seattle/Tacoma Intl

Wed 2/25

5:30 am-12:22 pm

1 stop5h 52m

$248

Idaho FallsSeattle

IDA - SEA

IDASEA

Idaho Falls Fanning Field

Fri 2/6

1:15 pm-6:29 pm

1 stop6h 14m

Seattle/Tacoma Intl

Mon 2/9

5:00 am-12:34 pm

1 stop6h 34m

$258

Idaho FallsSeattle

IDA - SEA

IDASEA

Idaho Falls Fanning Field

Fri 4/24

6:57 pm-11:59 pm

1 stop6h 02m

Seattle/Tacoma Intl

Tue 4/28

4:36 pm-10:35 pm

1 stop4h 59m

$258

Idaho FallsSeattle

IDA - SEA

IDASEA

Idaho Falls Fanning Field

Thu 2/12

5:25 am-9:45 am

1 stop5h 20m

$109

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/26

Showing 1-10 of 19 results
1
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Compare providers for flights from Idaho Falls to Seattle

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Idaho Falls to Seattle in December.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star
eDreamsPrice Accuracy3 starsTrust Score*3 stars
CheapflightsfaresPrice Accuracy3 starsTrust Score*2 stars
CheapfaremartPrice Accuracy-Trust Score*1 star

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Idaho Falls-Seattle flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Idaho Falls-Seattle flight deals on Cheapflights vs. eDreams >95% of the time. Price accuracy is based on data collected from Idaho Falls-Seattle flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Idaho Falls-Seattle flights, Cheapflights users trust eDreams the most. eDreams has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Idaho Falls-Seattle flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Idaho Falls to Seattle

Have a flexible travel schedule? Discover the best time to fly to Seattle from Idaho Falls 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 Falls to Seattle

How far ahead should I book a flight from Idaho Falls to Seattle?

Use this chart to determine the optimal time to book a round-trip flight from Idaho Falls to Seattle. Price data was last updated on December 26, 2025.

The best time to book flights from Idaho Falls to Seattle is 69 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

What is the cheapest month to book a flight from Idaho Falls to Seattle?

Currently, February is the cheapest month in which you can book a flight from Idaho Falls to Seattle (average of $111). Flying from Idaho Falls to Seattle in September is currently the most expensive (average of $206). 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 IDA to SEA?

Find hourly flight availability from Idaho Falls 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 December 28, 2025.

A simple way to save on the total cost of your ticket is to fly from Idaho Falls to Seattle in the evening. If you’re flexible enough to do this you can expect to save up to 61% on your trip compared to booking a flight at noon.

How much does it cost to fly round-trip from Idaho Falls 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 December 28, 2025.
Read through reviews of airlines operating flights from Idaho Falls to Seattle, such as Alaska Airlines, Delta, and Hawaiian Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
11,554 reviews

Comfort

7.8

Overall

8.0

Boarding

8.1

Entertainment

7.0

Crew

8.5

Food

7.1

Reviews

1 / 20
10.0
Excellent

Anonymous,Dec 2025

SJC - SEA

The flight was great. Don’t have to make it better. Everything was OK.
Alaska Airlines
8.0
Very good
11,554 reviews
Alaska Airlines
8.0
Very good
11,554 reviews

Comfort

7.8

Overall

8.0

Boarding

8.1

Entertainment

7.0

Crew

8.5

Food

7.1

Reviews

1 / 20
10.0
Excellent

Anonymous,Dec 2025

SJC - SEA

The flight was great. Don’t have to make it better. Everything was OK.
Delta
7.9
Good
8,016 reviews
Alaska Airlines
8.0
Very good
11,554 reviews

Comfort

7.8

Overall

8.0

Boarding

8.1

Entertainment

7.0

Crew

8.5

Food

7.1

Reviews

1 / 20
10.0
Excellent

Anonymous,Dec 2025

SJC - SEA

The flight was great. Don’t have to make it better. Everything was OK.
Hawaiian Airlines
7.8
Good
2,820 reviews
Alaska Airlines
8.0
Very good
11,554 reviews

Comfort

7.8

Overall

8.0

Boarding

8.1

Entertainment

7.0

Crew

8.5

Food

7.1

Reviews

1 / 20
10.0
Excellent

Anonymous,Dec 2025

SJC - SEA

The flight was great. Don’t have to make it better. Everything was OK.

Related info for your journey

Find useful and relevant information for your journey from Idaho Falls to Seattle. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airports do I use to fly from Idaho Falls to Seattle?

    Seattle/Tacoma Intl is the airport most travelers will use when flying to Seattle from Idaho Falls Fanning Field. Booking flights from Fanning Field (IDA) to Seattle/Tacoma Intl (SEA) should be relatively easy as there are 5 daily flights to Seattle from 3 different airlines. 2h 02m is how long a flight from Idaho Falls to Seattle/Tacoma Intl will take if you book a nonstop flight.

  • How popular is this Idaho Falls to Seattle flight route?

    The Idaho Falls Fanning Field to Seattle/Tacoma Intl flight path was viewed by 47 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 Falls to Seattle?

    Alaska Airlines can get you from Idaho Falls to Seattle in just under 2h 02m. Your travel time will be generally consistent. Idaho Falls and Seattle are separated by a distance of 565 mi. Generally, flights for this route are nonstop.

  • What are the cheapest airlines flying from Idaho Falls to Seattle round-trip?

    Delta, at $118, was found to be the cheapest airline from Idaho Falls to Seattle.Alternate airlines to your destination round-trip include Hawaiian Airlines and Alaska Airlines. You may be able to fly from Idaho Falls to Seattle for 61% less than the average price by searching for these airlines.

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

    Looking for the most reliable airlines to get you to your destination on time? Our data shows these are most likely to get you from Idaho Falls to Seattle on time: Horizon Air (90%), Qatar Airways (86%), Alaska Airlines (85%).

  • What are the cheapest flights from Idaho Falls to Seattle?

    Looking for the cheapest flight from Idaho Falls to Seattle? While on average our users pay $314, our data indicates the cheapest price to be $148. The most popular route (Idaho Falls Fanning Field - Seattle/Tacoma Intl), is priced around $217.

  • Can I find deals for flights from Idaho Falls to Seattle that include hotel bookings?

    Yes. In addition to deals on Idaho Falls to Seattle flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Idaho Falls to Seattle?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Idaho Falls to Seattle.

  • Can I find deals for business class flights from Idaho Falls to Seattle?

    Yes. Cheapflights offers flight deals from Idaho Falls 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 Falls to Seattle?

    Currently, February is the cheapest month in which you can book a flight from Idaho Falls to Seattle (average of $111). Flying from Idaho Falls to Seattle in September is currently the most expensive (average of $206). 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
Tacoma
SeaTac
Lakewood
Ocean Shores
Olympia
Edmonds
Lynnwood
Renton
Puyallup
Kirkland
Kent
Tukwila
Cle Elum
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Fife
Aberdeen
Shoreline
Centralia
Federal Way
Chehalis

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Top 3 airlines flying from Idaho Falls to Seattle

Discover the top 3 airlines that operate flights from Idaho Falls 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 December 28, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$118Average$286FlexibilityNo cancel feeOn-timeN/A
Hawaiian AirlinesCheapest$119Average$287FlexibilityNo cancel feeOn-time85%
Alaska AirlinesCheapest$185Average$312FlexibilityNo cancel feeOn-time75%

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