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$149+ 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 11/9. Fares are subject to change and may not be available on all flights or dates of travel.
IDA — SEA
Oct 16 — Oct 231
Thu 10/16
Thu 10/23
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 Saturday or Thursday 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 September 16, 2025.

Round-trip from

$197
(Alaska Airlines)

One-way from

$149
(Hawaiian Airlines)

Popular in

January

Cheapest in

April

Average price

$297

Good round-trip deal

$376 or less

Good one-way deal

$199 or less
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. 2% potential increase in price ($9 potential increase over avg. RT price).
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Cheapest flight prices on average. 1% potential price decrease ($6 potential savings vs. average RT price).
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Average for round-trip flights in September 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 September 16, 2025.

This Alaska Airlines deal was found by Cheapflights users on 9/15. 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 12/243:09 pmIDA - SEA
Nonstop2h 08mAlaska Airlines
Tue 12/309:21 pmSEA - IDA
Nonstop1h 46mAlaska Airlines
Deal found 9/15$197
This Delta deal was found by Cheapflights users on 9/14. 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 10/186:53 pmIDA - SEA
1 stop4h 29mDelta
Tue 10/215:25 amSEA - IDA
1 stop6h 08mDelta
Deal found 9/14$217
This Alaska Airlines deal was found by Cheapflights users on 9/15. 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 12/236:00 amIDA - SEA
Nonstop2h 20mAlaska Airlines
Thu 12/259:21 pmSEA - IDA
Nonstop1h 46mAlaska Airlines
Deal found 9/15$227
This Hawaiian Airlines deal was found by Cheapflights users on 9/15. 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 Hawaiian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/135:04 pmIDA - SEA
Nonstop2h 09mHawaiian Airlines
Tue 12/239:21 pmSEA - IDA
Nonstop1h 46mHawaiian Airlines
Deal found 9/15$228
This Alaska Airlines deal was found by Cheapflights users on 9/15. 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 12/236:00 amIDA - SEA
Nonstop2h 20mAlaska Airlines
Wed 12/249:21 pmSEA - IDA
Nonstop1h 46mAlaska Airlines
Deal found 9/15$237
This Alaska Airlines deal was found by Cheapflights users on 9/15. 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 12/256:00 amIDA - SEA
Nonstop2h 20mAlaska Airlines
Thu 12/2511:20 amSEA - IDA
Nonstop1h 46mAlaska Airlines
Deal found 9/15$251
This Alaska Airlines deal was found by Cheapflights users on 9/16. 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 12/226:00 amIDA - SEA
Nonstop2h 20mAlaska Airlines
Thu 1/87:55 pmSEA - IDA
Nonstop1h 43mAlaska Airlines
Deal found 9/16$257
This Alaska Airlines deal was found by Cheapflights users on 9/15. 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
Tue 12/309:21 pmSEA - IDA
Nonstop1h 46mAlaska Airlines
Deal found 9/15$258
This Alaska Airlines deal was found by Cheapflights users on 9/15. 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 12/226:00 amIDA - SEA
Nonstop2h 20mAlaska Airlines
Wed 12/249:21 pmSEA - IDA
Nonstop1h 46mAlaska Airlines
Deal found 9/15$267
This Delta deal was found by Cheapflights users on 9/15. 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 12/255:55 amIDA - SEA
1 stop7h 41mDelta
Thu 12/254:57 pmSEA - IDA
1 stop5h 00mDelta
Deal found 9/15$277
This Alaska Airlines deal was found by Cheapflights users on 9/15. 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 12/203:09 pmIDA - SEA
Nonstop2h 08mAlaska Airlines
Sat 12/279:21 pmSEA - IDA
Nonstop1h 46mAlaska Airlines
Deal found 9/15$288
This Alaska Airlines deal was found by Cheapflights users on 9/14. 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 12/55:04 pmIDA - SEA
Nonstop2h 09mAlaska Airlines
Fri 12/59:15 pmSEA - IDA
Nonstop1h 47mAlaska Airlines
Deal found 9/14$291

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 September 16, 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

Thu 11/6

3:50 pm-4:54 pm

Nonstop2h 04m

Seattle/Tacoma Intl

Sat 11/8

12:24 pm-3:13 pm

Nonstop1h 49m

$227

Idaho FallsSeattle

IDA - SEA

IDASEA

Idaho Falls Fanning Field

Fri 12/5

6:05 am-7:14 am

Nonstop2h 09m

Seattle/Tacoma Intl

Sat 12/6

1:36 pm-4:27 pm

Nonstop1h 51m

$227

Idaho FallsSeattle

IDA - SEA

IDASEA

Idaho Falls Fanning Field

Sat 11/8

3:50 pm-4:54 pm

Nonstop2h 04m

Seattle/Tacoma Intl

Sun 11/9

9:15 pm-11:59 pm

Nonstop1h 44m

$227

Idaho FallsSeattle

IDA - SEA

IDASEA

Idaho Falls Fanning Field

Wed 11/19

6:05 am-7:14 am

Nonstop2h 09m

Seattle/Tacoma Intl

Sun 11/23

9:15 pm-12:02 am

Nonstop1h 47m

$227

Idaho FallsSeattle

IDA - SEA

IDASEA

Idaho Falls Fanning Field

Sat 12/6

6:05 am-7:14 am

Nonstop2h 09m

Seattle/Tacoma Intl

Sun 12/7

9:15 pm-12:02 am

Nonstop1h 47m

$227

Idaho FallsSeattle

IDA - SEA

IDASEA

Idaho Falls Fanning Field

Tue 2/24

8:00 am-8:59 am

Nonstop1h 59m

Seattle/Tacoma Intl

Tue 3/24

12:40 pm-3:20 pm

Nonstop1h 40m

$228

Idaho FallsSeattle

IDA - SEA

IDASEA

Idaho Falls Fanning Field

Tue 2/3

6:45 pm-12:11 am

1 stop6h 26m

Seattle/Tacoma Intl

Wed 2/25

4:55 pm-10:21 pm

1 stop4h 26m

$237

Idaho FallsSeattle

IDA - SEA

IDASEA

Idaho Falls Fanning Field

Sat 10/11

6:00 am-7:11 am

Nonstop2h 11m

Seattle/Tacoma Intl

Sat 10/11

7:55 pm-10:38 pm

Nonstop1h 43m

$237

Idaho FallsSeattle

IDA - SEA

IDASEA

Idaho Falls Fanning Field

Tue 2/24

1:05 pm-6:32 pm

1 stop6h 27m

Seattle/Tacoma Intl

Tue 3/24

4:55 pm-10:21 pm

1 stop4h 26m

$247

Idaho FallsSeattle

IDA - SEA

IDASEA

Idaho Falls Fanning Field

Fri 11/7

6:05 am-7:14 am

Nonstop2h 09m

Seattle/Tacoma Intl

Sun 11/9

9:15 pm-11:59 pm

Nonstop1h 44m

$257

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/14

Showing 1-10 of 22 results
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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 September 12, 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, January is the cheapest month in which you can book a flight from Idaho Falls to Seattle (average of $238). Flying from Idaho Falls to Seattle in June is currently the most expensive (average of $387). 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 September 16, 2025.

A simple way to save on the total cost of your ticket is to fly from Idaho Falls to Seattle in the afternoon. If you’re flexible enough to do this you can expect to save up to 49% on your trip compared to booking a flight in the morning.

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 September 16, 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
10,000 reviews

Food

7.1

Comfort

7.8

Entertainment

7.1

Overall

8.0

Boarding

8.1

Crew

8.5

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
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Comfort

7.8

Entertainment

7.1

Overall

8.0

Boarding

8.1

Crew

8.5

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
8.0
Very good
7,957 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Comfort

7.8

Entertainment

7.1

Overall

8.0

Boarding

8.1

Crew

8.5

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
2,724 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Comfort

7.8

Entertainment

7.1

Overall

8.0

Boarding

8.1

Crew

8.5

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 5 daily flights to Seattle from 3 different airlines. 1h 56m 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 and Hawaiian Airlines can get you from Idaho Falls to Seattle in just under 2h 04m. 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: Qatar Airways (97%), Alaska Airlines (89%), Horizon Air (89%).

  • 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 $433, our data indicates the cheapest price to be $155. The most popular route (Idaho Falls Fanning Field - Seattle/Tacoma Intl), is priced around $197.

  • 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, January is the cheapest month in which you can book a flight from Idaho Falls to Seattle (average of $238). Flying from Idaho Falls to Seattle in June is currently the most expensive (average of $387). 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
Lakewood
Ocean Shores
Lynnwood
Edmonds
Leavenworth
Renton
Lacey
Olympia
Kent
Federal Way
Cle Elum
Puyallup
Chehalis
Kirkland
Issaquah
Aberdeen
Shoreline

Browse thousands of different options on Cheapflights for your next trip

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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 September 16, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$118Average$286FlexibilityNo cancel feeOn-timeN/A
Hawaiian AirlinesCheapest$119Average$287FlexibilityNo cancel feeOn-time85%
Alaska AirlinesCheapest$195Average$303FlexibilityNo cancel feeOn-time75%

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