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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 8/19. Fares are subject to change and may not be available on all flights or dates of travel.
IDA — SEA
jul. 16 — jul. 231
mié. 7/16
mié. 7/23
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 October, booked 81 days in advance, depart on a Thursday or Saturday and return on a Wednesday

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 julio 11, 2025.

Round-trip from

$177
(Alaska Airlines)

One-way from

$109
(Alaska Airlines)

Popular in

January

Cheapest in

April

Average price

$366

Good round-trip deal

$278 or less

Good one-way deal

$179 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. 3% potential increase in price ($11 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($6 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 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 julio 11, 2025.

This Alaska Airlines deal was found by Cheapflights users on 7/10. 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.
mié. 8/276:13 amIDA - SEA
Nonstop1h 57mAlaska Airlines
mié. 9/37:55 pmSEA - IDA
Nonstop1h 44mAlaska Airlines
Deal found 7/10$177
This Delta deal was found by Cheapflights users on 7/10. 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.
mié. 8/273:00 pmIDA - SEA
1 stop5h 00mDelta
lun. 9/15:30 amSEA - IDA
1 stop4h 09mDelta
Deal found 7/10$217
This Hawaiian Airlines deal was found by Cheapflights users on 7/10. 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.
vie. 8/293:54 pmIDA - SEA
Nonstop1h 56mHawaiian Airlines
lun. 9/17:55 pmSEA - IDA
Nonstop1h 44mHawaiian Airlines
Deal found 7/10$258
This Mytrip deal was found by Cheapflights users on 7/9. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 8/17:23 pmIDA - SEA
2 stops22h 02mMultiple Airlines
dom. 8/35:30 pmSEA - IDA
2 stops24h 03mMultiple Airlines
Deal found 7/9$314

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 julio 11, 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

mié. 8/27

6:13 am-7:10 am

Nonstop1h 57m

Seattle/Tacoma Intl

sáb. 8/30

7:55 pm-10:39 pm

Nonstop1h 44m

$177

Idaho FallsSeattle

IDA - SEA

IDASEA

Idaho Falls Fanning Field

mié. 8/27

3:00 pm-7:00 pm

1 stop5h 00m

Seattle/Tacoma Intl

lun. 9/1

5:30 am-10:39 am

1 stop4h 09m

$217

Idaho FallsSeattle

IDA - SEA

IDASEA

Idaho Falls Fanning Field

vie. 8/29

3:54 pm-4:50 pm

Nonstop1h 56m

Seattle/Tacoma Intl

lun. 9/1

7:55 pm-10:39 pm

Nonstop1h 44m

$258

Idaho FallsSeattle

IDA - SEA

IDASEA

Idaho Falls Fanning Field

vie. 8/1

7:23 pm-4:25 pm

2 stops22h 02m

Seattle/Tacoma Intl

dom. 8/3

5:30 pm-6:33 pm

2 stops24h 03m

$314

Idaho FallsSeattle

IDA - SEA

IDASEA

Idaho Falls Fanning Field

mar. 8/19

6:15 am-7:11 am

Nonstop1h 56m

$109

Idaho FallsSeattle

IDA - SEA

IDASEA

Idaho Falls Fanning Field

mié. 8/13

6:52 pm-10:20 pm

1 stop4h 28m

$119

Idaho FallsSeattle

IDA - SEA

IDASEA

Idaho Falls Fanning Field

jue. 7/17

6:15 am-7:11 am

Nonstop1h 56m

$244

Idaho FallsSeattle

IDA - SEA

IDASEA

Idaho Falls Fanning Field

lun. 8/18

1:17 pm-10:25 am

2 stops22h 08m

$264

Idaho FallsSeattle

IDA - SEA

IDASEA

Idaho Falls Fanning Field

vie. 11/21

9:11 pm-5:15 pm

2 stops21h 04m

$288

Idaho FallsSeattle

IDA - SEA

IDASEA

Idaho Falls Fanning Field

mar. 8/19

5:00 am-10:52 pm

2 stops18h 52m

$339

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/10

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 June 27, 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 $388). 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 julio 11, 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 50% on your trip compared to booking a flight in the morning.

Weekly flight availability from Idaho Falls to Seattle

Explore weekly flight availability from Idaho Falls 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 julio 11, 2025.

The most flights from IDA to SEA are scheduled on a Monday (5 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (5 on average).

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 julio 11, 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

Overall

8.0

Food

7.1

Crew

8.5

Entertainment

7.1

Boarding

8.1

Comfort

7.8

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
Alaska Airlines
8.0
Very good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Overall

8.0

Food

7.1

Crew

8.5

Entertainment

7.1

Boarding

8.1

Comfort

7.8

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
Delta
8.0
Very good
7,951 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Overall

8.0

Food

7.1

Crew

8.5

Entertainment

7.1

Boarding

8.1

Comfort

7.8

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
Hawaiian Airlines
7.8
Good
2,562 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Overall

8.0

Food

7.1

Crew

8.5

Entertainment

7.1

Boarding

8.1

Comfort

7.8

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
United Airlines
7.4
Good
8,846 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Overall

8.0

Food

7.1

Crew

8.5

Entertainment

7.1

Boarding

8.1

Comfort

7.8

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
American Airlines
7.2
Good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Overall

8.0

Food

7.1

Crew

8.5

Entertainment

7.1

Boarding

8.1

Comfort

7.8

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them

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 48 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 flying from Idaho Falls to Seattle round-trip?

    Alaska Airlines, at $177, was found to be the cheapest airline from Idaho Falls to Seattle.Alternate airlines to your destination round-trip include Delta and Hawaiian Airlines. You may be able to fly from Idaho Falls to Seattle for 42% less than the average price by searching for these airlines.

  • What are the cheapest airlines to fly from Idaho Falls to Seattle one-way?

    One-way options have recently been found by users for as low as $109 on Alaska Airlines. Other airlines that offer cheap prices include Delta from $119 and Hawaiian Airlines from $244 one-way.

  • 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 (96%), Alaska Airlines (82%), Horizon Air (82%).

  • 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 $415, our data indicates the cheapest price to be $88. 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 $388). 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 Idaho Falls?

Book flights to Idaho Falls if you plan to visit one of these locations
SeaTac
Tukwila
Tacoma
Lakewood
Ocean Shores
Lacey
Leavenworth
Lynnwood
Renton
Olympia
Shoreline
Puyallup
Cle Elum
Centralia
Kent
Chehalis
Kirkland
Aberdeen
Federal Way
Shelton

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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 julio 11, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$118Average$286FlexibilityNo cancel feeOn-timeN/A
Hawaiian AirlinesCheapest$119Average$298FlexibilityNo cancel feeOn-time85%
Alaska AirlinesCheapest$196Average$307FlexibilityNo cancel feeOn-time75%

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