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$119+ 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 5/15. Fares are subject to change and may not be available on all flights or dates of travel.
IDA — SEA
May 11 — May 181
Mon 5/11
Mon 5/18
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

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

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Cheapflights Tip: The best prices from Idaho Falls Fanning Field to Seattle/Tacoma Intl are usually found in January or February, booked 78 days in advance, depart on a Thursday or Wednesday and return on a Monday

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 April 11, 2026.

This Alaska Airlines deal was found by Cheapflights users on 4/9. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/191:54 pm
IDA
-
SEA
Nonstop2h 02m
Alaska Airlines
Tue 5/2612:35 pm
SEA
-
IDA
Nonstop1h 51m
Alaska Airlines
Deal found 4/9$197
This Alaska Airlines deal was found by Cheapflights users on 4/9. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/221:54 pm
IDA
-
SEA
Nonstop2h 02m
Alaska Airlines
Tue 5/268:00 pm
SEA
-
IDA
Nonstop1h 53m
Alaska Airlines
Deal found 4/9$207
This Alaska Airlines deal was found by Cheapflights users on 4/8. 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 5/296:00 am
IDA
-
SEA
Nonstop2h 03m
Alaska Airlines
Mon 6/88:00 pm
SEA
-
IDA
Nonstop1h 53m
Alaska Airlines
Deal found 4/8$217
This Trip.com deal was found by Cheapflights users on 4/9. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/236:00 am
IDA
-
SEA
Nonstop2h 03m
Alaska Airlines
Sun 5/247:05 am
SEA
-
IDA
1 stop5h 12m
Alaska Airlines
Deal found 4/9$228
This Alaska Airlines deal was found by Cheapflights users on 4/9. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/184:03 pm
IDA
-
SEA
1 stop3h 55m
Alaska Airlines
Wed 5/2012:35 pm
SEA
-
IDA
Nonstop1h 51m
Alaska Airlines
Deal found 4/9$237
This Alaska Airlines deal was found by Cheapflights users on 4/9. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/176:00 am
IDA
-
SEA
Nonstop2h 03m
Alaska Airlines
Wed 5/207:05 am
SEA
-
IDA
1 stop5h 12m
Alaska Airlines
Deal found 4/9$247
This Alaska Airlines deal was found by Cheapflights users on 4/9. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/216:00 am
IDA
-
SEA
Nonstop2h 03m
Alaska Airlines
Mon 5/258:00 pm
SEA
-
IDA
Nonstop1h 53m
Alaska Airlines
Deal found 4/9$257
This Alaska Airlines deal was found by Cheapflights users on 4/7. 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 5/224:03 pm
IDA
-
SEA
1 stop14h 59m
Alaska Airlines
Sat 5/2312:35 pm
SEA
-
IDA
Nonstop1h 51m
Alaska Airlines
Deal found 4/7$260
This Alaska Airlines deal was found by Cheapflights users on 4/9. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/174:03 pm
IDA
-
SEA
1 stop14h 59m
Alaska Airlines
Sat 5/2312:35 pm
SEA
-
IDA
Nonstop1h 51m
Alaska Airlines
Deal found 4/9$270
This Alaska Airlines deal was found by Cheapflights users on 4/6. 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 5/46:00 am
IDA
-
SEA
Nonstop1h 57m
Alaska Airlines
Mon 5/1112:43 pm
SEA
-
IDA
Nonstop1h 46m
Alaska Airlines
Deal found 4/6$272
This Kiwi.com deal was found by Cheapflights users on 4/10. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/410:21 pm
IDA
-
SEA
2 stops21h 14m
Multiple Airlines
Sun 5/1011:37 am
SEA
-
IDA
1 stop26h 50m
Multiple Airlines
Deal found 4/10$276
This Alaska Airlines deal was found by Cheapflights users on 4/9. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/191:54 pm
IDA
-
SEA
Nonstop2h 02m
Alaska Airlines
Fri 5/2211:03 pm
SEA
-
IDA
1 stop13h 14m
Alaska Airlines
Deal found 4/9$280

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 April 11, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$197
(Alaska Airlines)

One-way from

$119
(Alaska Airlines)

Popular in

March

Cheapest in

January

Average price

$365

Good round-trip deal

$342 or less

Good one-way deal

$254 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.
Search Deals
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. 6% potential increase in price ($21 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($7 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in April 2026
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 April 11, 2026.
Use the filters below to find and compare flights from Idaho Falls to Seattle that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

Idaho FallsSeattle

IDA - SEA

IDASEA

Idaho Falls Fanning Field

Fri 5/22

4:03 pm-6:02 am

1 stop14h 59m

Seattle/Tacoma Intl

Fri 5/29

7:05 am-1:17 pm

1 stop5h 12m

$290

Idaho FallsSeattle

IDA - SEA

IDASEA

Idaho Falls Fanning Field

Thu 9/3

1:45 pm-2:51 pm

Nonstop2h 06m

Seattle/Tacoma Intl

Fri 9/11

8:05 pm-10:56 pm

Nonstop1h 51m

$312
Quickest round-trip

Idaho FallsSeattle

IDA - SEA

IDASEA

Idaho Falls Fanning Field

Wed 5/6

4:06 pm-5:00 pm

Nonstop1h 54m

Seattle/Tacoma Intl

Sat 5/9

7:54 pm-10:40 pm

Nonstop1h 46m

$312

Idaho FallsSeattle

IDA - SEA

IDASEA

Idaho Falls Fanning Field

Fri 5/29

6:00 am-7:03 am

Nonstop2h 03m

Seattle/Tacoma Intl

Mon 6/8

7:05 am-1:17 pm

1 stop5h 12m

$322

Idaho FallsSeattle

IDA - SEA

IDASEA

Idaho Falls Fanning Field

Tue 4/21

6:00 am-7:05 am

Nonstop2h 05m

Seattle/Tacoma Intl

Sat 4/25

12:43 pm-3:29 pm

Nonstop1h 46m

$357

Idaho FallsSeattle

IDA - SEA

IDASEA

Idaho Falls Fanning Field

Thu 4/30

4:06 pm-5:00 pm

Nonstop1h 54m

Seattle/Tacoma Intl

Sun 5/3

7:54 pm-10:40 pm

Nonstop1h 46m

$392

Idaho FallsSeattle

IDA - SEA

IDASEA

Idaho Falls Fanning Field

Sat 7/18

4:14 pm-6:33 pm

1 stop3h 19m

Seattle/Tacoma Intl

Sun 7/26

7:50 pm-10:39 pm

Nonstop1h 49m

$412

Idaho FallsSeattle

IDA - SEA

IDASEA

Idaho Falls Fanning Field

Fri 8/21

6:18 am-7:20 am

Nonstop2h 02m

Seattle/Tacoma Intl

Mon 8/24

8:59 pm-1:08 pm

1 stop15h 09m

$425
Cheapest one-way

Idaho FallsSeattle

IDA - SEA

IDASEA

Idaho Falls Fanning Field

Sun 5/24

4:03 pm-6:54 pm

1 stop3h 51m

$119

Idaho FallsSeattle

IDA - SEA

IDASEA

Idaho Falls Fanning Field

Fri 5/15

6:54 pm-12:12 am

1 stop6h 18m

$124

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/9

Showing 1-10 of 15 resultsSorted by cheapest first
1
2

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 April.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars
CheapflightsfaresPrice Accuracy2 starsTrust Score*2 stars

*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 April 10, 2026.

The best time to book flights from Idaho Falls to Seattle is 77 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 $107). Flying from Idaho Falls to Seattle in April is currently the most expensive (average of $227). 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 April 11, 2026.

When flying from Idaho Falls to Seattle, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

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 April 11, 2026.
Read through reviews of airlines operating flights from Idaho Falls to Seattle, such as Alaska Airlines,Delta, andHawaiian Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
7.9
Good
12,211 reviews

Boarding

8.1

Entertainment

7.0

Overall

7.9

Food

7.0

Comfort

7.8

Crew

8.5

Reviews

1 / 20
8.0
Excellent

Eugene,Mar 2026

MFR - SEA

Alaska Airlines is is always good. There where few choices of what to drink, and no food. No blankets, no pillows, and you h ats ok. I just had open heart surgery And i could have used something. But the flight and the crew where exelent. So all is well
Alaska Airlines
7.9
Good
12,211 reviews
Alaska Airlines
7.9
Good
12,211 reviews

Boarding

8.1

Entertainment

7.0

Overall

7.9

Food

7.0

Comfort

7.8

Crew

8.5

Reviews

1 / 20
8.0
Excellent

Eugene,Mar 2026

MFR - SEA

Alaska Airlines is is always good. There where few choices of what to drink, and no food. No blankets, no pillows, and you h ats ok. I just had open heart surgery And i could have used something. But the flight and the crew where exelent. So all is well
Delta
7.9
Good
8,406 reviews
Alaska Airlines
7.9
Good
12,211 reviews

Boarding

8.1

Entertainment

7.0

Overall

7.9

Food

7.0

Comfort

7.8

Crew

8.5

Reviews

1 / 20
8.0
Excellent

Eugene,Mar 2026

MFR - SEA

Alaska Airlines is is always good. There where few choices of what to drink, and no food. No blankets, no pillows, and you h ats ok. I just had open heart surgery And i could have used something. But the flight and the crew where exelent. So all is well
Hawaiian Airlines
7.8
Good
2,839 reviews
Alaska Airlines
7.9
Good
12,211 reviews

Boarding

8.1

Entertainment

7.0

Overall

7.9

Food

7.0

Comfort

7.8

Crew

8.5

Reviews

1 / 20
8.0
Excellent

Eugene,Mar 2026

MFR - SEA

Alaska Airlines is is always good. There where few choices of what to drink, and no food. No blankets, no pillows, and you h ats ok. I just had open heart surgery And i could have used something. But the flight and the crew where exelent. So all is well

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 4 daily flights to Seattle from 3 different airlines. 1h 54m 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 23 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?

    Hawaiian Airlines, at $119, was found to be the cheapest airline from Idaho Falls to Seattle.Alternate airlines to your destination round-trip include Delta 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: Horizon Air (87%), Qatar Airways (86%), Alaska Airlines (83%).

  • 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 $376, our data indicates the cheapest price to be $171. The most popular route (Idaho Falls Fanning Field - Seattle/Tacoma Intl), is priced around $257.

  • 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 $107). Flying from Idaho Falls to Seattle in April is currently the most expensive (average of $227). 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
Lacey
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Leavenworth
Snoqualmie
Tumwater
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Fife
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Issaquah
Shoreline

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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 April 11, 2026.
AirlineCheapestAverageFlexibilityOn-time
Hawaiian AirlinesCheapest$119Average$267FlexibilityNo cancel feeOn-time85%
DeltaCheapest$128Average$286FlexibilityNo cancel feeOn-timeN/A
Alaska AirlinesCheapest$185Average$312FlexibilityNo cancel feeOn-time75%

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