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$99+ 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 11/18. Fares are subject to change and may not be available on all flights or dates of travel.
IDA — SEA
Nov 22 — Nov 291
Sat 11/22
Sat 11/29
1 adult, Economy
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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 81 days in advance, depart on a Thursday or Friday and return on a Tuesday

Cheap 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 October 23, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$157
(Alaska Airlines)

One-way from

$99
(Alaska Airlines)

Popular in

November

Cheapest in

April

Average price

$267

Good round-trip deal

$313 or less

Good one-way deal

$170 or less
Provider with most accurate pricing for Idaho Falls Fanning Field-Seattle/Tacoma Intl flight deals.
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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
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One-way flight from Idaho Falls Fanning Field to Seattle/Tacoma Intl
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Highest demand for flights based on searches. 9% potential increase in price ($32 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($12 potential savings vs. average RT price).
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Average for round-trip flights in October 2025
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Price to beat on a round-trip flight from Idaho Falls Fanning Field to Seattle/Tacoma Intl.
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Price to beat on a one-way flight from Idaho Falls Fanning Field to Seattle/Tacoma Intl.
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Find 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 October 23, 2025.

This Alaska Airlines deal was found by Cheapflights users on 10/22. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/95:07 pmIDA - SEA
Nonstop2h 09mAlaska Airlines
Sat 12/131:36 pmSEA - IDA
Nonstop1h 51mAlaska Airlines
Deal found 10/22$157
This Alaska Airlines deal was found by Cheapflights users on 10/22. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/95:07 pmIDA - SEA
Nonstop2h 09mAlaska Airlines
Mon 12/151:36 pmSEA - IDA
Nonstop1h 51mAlaska Airlines
Deal found 10/22$167
This Cheapflightsfares deal was found by Cheapflights users on 10/22. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/115:07 pmIDA - SEA
Nonstop2h 09mAlaska Airlines
Mon 12/151:36 pmSEA - IDA
Nonstop1h 51mAlaska Airlines
Deal found 10/22$175
This Alaska Airlines deal was found by Cheapflights users on 10/22. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/125:07 pmIDA - SEA
Nonstop2h 09mAlaska Airlines
Sun 12/149:15 pmSEA - IDA
Nonstop1h 44mAlaska Airlines
Deal found 10/22$177
This Alaska Airlines deal was found by Cheapflights users on 10/22. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/136:05 amIDA - SEA
Nonstop2h 09mAlaska Airlines
Sat 12/131:36 pmSEA - IDA
Nonstop1h 51mAlaska Airlines
Deal found 10/22$197
This Alaska Airlines deal was found by Cheapflights users on 10/22. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/95:07 pmIDA - SEA
Nonstop2h 09mAlaska Airlines
Fri 12/121:36 pmSEA - IDA
Nonstop1h 51mAlaska Airlines
Deal found 10/22$207
This Alaska Airlines deal was found by Cheapflights users on 10/22. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/95:07 pmIDA - SEA
Nonstop2h 09mAlaska Airlines
Tue 12/161:36 pmSEA - IDA
Nonstop1h 51mAlaska Airlines
Deal found 10/22$208
This Alaska Airlines deal was found by Cheapflights users on 10/22. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/125:07 pmIDA - SEA
Nonstop2h 09mAlaska Airlines
Fri 12/129:15 pmSEA - IDA
Nonstop1h 44mAlaska Airlines
Deal found 10/22$211
This Alaska Airlines deal was found by Cheapflights users on 10/22. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/145:07 pmIDA - SEA
Nonstop2h 09mAlaska Airlines
Mon 12/151:36 pmSEA - IDA
Nonstop1h 51mAlaska Airlines
Deal found 10/22$217
This Alaska Airlines deal was found by Cheapflights users on 10/22. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/105:07 pmIDA - SEA
Nonstop2h 09mAlaska Airlines
Tue 12/161:36 pmSEA - IDA
Nonstop1h 51mAlaska Airlines
Deal found 10/22$218
This Delta deal was found by Cheapflights users on 10/22. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/91:17 pmIDA - SEA
1 stop4h 37mDelta
Fri 12/125:00 pmSEA - IDA
1 stop4h 21mDelta
Deal found 10/22$227
This Delta deal was found by Cheapflights users on 10/22. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/117:06 pmIDA - SEA
1 stop6h 14mDelta
Fri 12/125:00 pmSEA - IDA
1 stop4h 21mDelta
Deal found 10/22$237

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 October 23, 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 12/12

5:07 pm-6:16 pm

Nonstop2h 09m

Seattle/Tacoma Intl

Sat 12/13

1:36 pm-4:27 pm

Nonstop1h 51m

$167

Idaho FallsSeattle

IDA - SEA

IDASEA

Idaho Falls Fanning Field

Sat 12/13

6:05 am-7:14 am

Nonstop2h 09m

Seattle/Tacoma Intl

Wed 12/17

9:15 pm-11:59 pm

Nonstop1h 44m

$167

Idaho FallsSeattle

IDA - SEA

IDASEA

Idaho Falls Fanning Field

Tue 12/9

5:07 pm-6:16 pm

Nonstop2h 09m

Seattle/Tacoma Intl

Sun 12/14

9:15 pm-11:59 pm

Nonstop1h 44m

$167

Idaho FallsSeattle

IDA - SEA

IDASEA

Idaho Falls Fanning Field

Thu 12/11

5:07 pm-6:16 pm

Nonstop2h 09m

Seattle/Tacoma Intl

Sat 12/13

1:36 pm-4:27 pm

Nonstop1h 51m

$167

Idaho FallsSeattle

IDA - SEA

IDASEA

Idaho Falls Fanning Field

Sat 12/13

5:07 pm-6:16 pm

Nonstop2h 09m

Seattle/Tacoma Intl

Sun 12/14

9:15 pm-11:59 pm

Nonstop1h 44m

$167

Idaho FallsSeattle

IDA - SEA

IDASEA

Idaho Falls Fanning Field

Wed 12/10

5:07 pm-6:16 pm

Nonstop2h 09m

Seattle/Tacoma Intl

Sun 12/14

9:15 pm-11:59 pm

Nonstop1h 44m

$177

Idaho FallsSeattle

IDA - SEA

IDASEA

Idaho Falls Fanning Field

Fri 12/12

5:07 pm-6:16 pm

Nonstop2h 09m

Seattle/Tacoma Intl

Mon 12/15

1:36 pm-4:27 pm

Nonstop1h 51m

$177

Idaho FallsSeattle

IDA - SEA

IDASEA

Idaho Falls Fanning Field

Fri 12/12

5:07 pm-6:16 pm

Nonstop2h 09m

Seattle/Tacoma Intl

Wed 12/17

9:15 pm-11:59 pm

Nonstop1h 44m

$177

Idaho FallsSeattle

IDA - SEA

IDASEA

Idaho Falls Fanning Field

Wed 12/10

5:07 pm-6:16 pm

Nonstop2h 09m

Seattle/Tacoma Intl

Mon 12/15

1:36 pm-4:27 pm

Nonstop1h 51m

$177

Idaho FallsSeattle

IDA - SEA

IDASEA

Idaho Falls Fanning Field

Fri 12/12

5:07 pm-6:16 pm

Nonstop2h 09m

Seattle/Tacoma Intl

Thu 12/18

9:21 pm-12:07 am

Nonstop1h 46m

$177

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/21

Showing 1-10 of 23 results
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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 October.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars
CheapflightsfaresPrice Accuracy2 starsTrust Score*1 star
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 FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Idaho Falls-Seattle flight deals on Cheapflights vs. FlightHub >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 FlightHub the most. FlightHub 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 October 17, 2025.

The best time to book flights from Idaho Falls to Seattle is 81 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, July is the cheapest month in which you can book a flight from Idaho Falls to Seattle (average of $119). Flying from Idaho Falls to Seattle in September is currently the most expensive (average of $205). 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 October 23, 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 October 23, 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
11,155 reviews

Overall

8.0

Crew

8.5

Comfort

7.8

Boarding

8.1

Food

7.1

Entertainment

7.0

Reviews

1 / 20
10.0
Excellent

Anonymous,Aug 2025

MFR - SEA

Great smooth flight. Was hour and half late though. Don't know why
Alaska Airlines
8.0
Very good
11,155 reviews
Alaska Airlines
8.0
Very good
11,155 reviews

Overall

8.0

Crew

8.5

Comfort

7.8

Boarding

8.1

Food

7.1

Entertainment

7.0

Reviews

1 / 20
10.0
Excellent

Anonymous,Aug 2025

MFR - SEA

Great smooth flight. Was hour and half late though. Don't know why
Delta
7.9
Good
7,981 reviews
Alaska Airlines
8.0
Very good
11,155 reviews

Overall

8.0

Crew

8.5

Comfort

7.8

Boarding

8.1

Food

7.1

Entertainment

7.0

Reviews

1 / 20
10.0
Excellent

Anonymous,Aug 2025

MFR - SEA

Great smooth flight. Was hour and half late though. Don't know why
Hawaiian Airlines
7.8
Good
2,788 reviews
Alaska Airlines
8.0
Very good
11,155 reviews

Overall

8.0

Crew

8.5

Comfort

7.8

Boarding

8.1

Food

7.1

Entertainment

7.0

Reviews

1 / 20
10.0
Excellent

Anonymous,Aug 2025

MFR - SEA

Great smooth flight. Was hour and half late though. Don't know why

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 2 daily flights to Seattle from 3 different airlines. 1h 59m 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 49 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 09m. 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 62% 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: Qatar Airways (95%), Alaska Airlines (92%), Horizon Air (92%).

  • 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 $333, our data indicates the cheapest price to be $130. The most popular route (Idaho Falls Fanning Field - Seattle/Tacoma Intl), is priced around $157.

  • 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, July is the cheapest month in which you can book a flight from Idaho Falls to Seattle (average of $119). Flying from Idaho Falls to Seattle in September is currently the most expensive (average of $205). 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
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Leavenworth
Renton
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Olympia
Kent
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Issaquah

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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 October 23, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$118Average$286FlexibilityNo cancel feeOn-timeN/A
Hawaiian AirlinesCheapest$119Average$287FlexibilityNo cancel feeOn-time85%
Alaska AirlinesCheapest$187Average$308FlexibilityNo cancel feeOn-time75%

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