$156+ 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 9/14. Fares are subject to change and may not be available on all flights or dates of travel.
IDA — SEA
Sep 25 — Oct 21
Round-trip
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”2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheapflights Tip: The best prices from Idaho Falls Fanning Field to Seattle/Tacoma Intl are usually found in January or February, booked 24 days in advance, depart on a Thursday or Saturday and return on a Thursday
Cheap flight deals from Idaho Falls to Seattle
Cheapest
Best
Last-minute
One-way
Cheapest flights from Idaho Falls to SeattleExplore 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 August 26, 2026.
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 August 26, 2026.
This Alaska Airlines deal was found by Cheapflights users on 8/24. 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 10/303:57 pm -
2 stops17h 59m
Sat 10/3112:30 pm -
Nonstop1h 50m
Deal found 8/24![Alaska Airlines logo]()
$289
This Alaska Airlines deal was found by Cheapflights users on 8/25. 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 10/106:09 am -
Nonstop2h 11m
Wed 10/1412:30 pm -
Nonstop1h 50m
Deal found 8/25![Alaska Airlines logo]()
$297
This Vliegwinkel deal was found by Cheapflights users on 8/24. 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 Vliegwinkel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/266:18 am -
Nonstop2h 02m
Mon 9/288:05 pm -
Nonstop1h 51m
Deal found 8/24![Alaska Airlines logo]()
$308
This Booking.com deal was found by Cheapflights users on 8/22. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/253:57 pm -
2 stops17h 59m
Mon 10/2612:30 pm -
Nonstop1h 50m
Deal found 8/22![Alaska Airlines logo]()
$319
This Expedia deal was found by Cheapflights users on 8/24. 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.
Thu 10/16:18 am -
Nonstop2h 02m
Tue 10/68:40 am -
1 stop3h 41m
Deal found 8/24![Alaska Airlines logo]()
$327
This Expedia deal was found by Cheapflights users on 8/21. 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.
Wed 10/141:58 pm -
Nonstop2h 06m
Mon 10/198:10 pm -
Nonstop1h 49m
Deal found 8/21![Alaska Airlines logo]()
$331
Best flights from Idaho Falls to SeattleDiscover carefully curated flight deals from Idaho Falls to Seattle that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated August 26, 2026.
Discover carefully curated flight deals from Idaho Falls to Seattle that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated August 26, 2026.
This Alaska Airlines deal was found by Cheapflights users on 8/24. 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 10/303:57 pm -
2 stops17h 59m
Sat 10/3112:30 pm -
Nonstop1h 50m
Deal found 8/24![Alaska Airlines logo]()
$289
This Delta deal was found by Cheapflights users on 8/22. 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 10/206:56 pm -
1 stop4h 09m
Sun 10/2511:05 am -
1 stop6h 11m
Deal found 8/22![Delta logo]()
$332
This Alaska Airlines deal was found by Cheapflights users on 8/25. 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 10/106:09 am -
Nonstop2h 11m
Wed 10/1412:30 pm -
Nonstop1h 50m
Deal found 8/25![Alaska Airlines logo]()
$297
This Delta deal was found by Cheapflights users on 8/21. 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 12/41:11 pm -
1 stop6h 32m
Mon 12/711:00 am -
1 stop6h 16m
Deal found 8/21![Delta logo]()
$357
This Alaska Airlines deal was found by Cheapflights users on 8/21. 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 9/282:01 pm -
Nonstop2h 06m
Sat 10/38:10 pm -
Nonstop1h 49m
Deal found 8/21![Alaska Airlines logo]()
$332
This Alaska Airlines deal was found by Cheapflights users on 8/25. 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 10/96:09 am -
Nonstop2h 11m
Wed 10/1412:30 pm -
Nonstop1h 50m
Deal found 8/25![Alaska Airlines logo]()
$342
This Alaska Airlines deal was found by Cheapflights users on 8/23. 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 11/26:04 am -
Nonstop2h 16m
Fri 11/610:05 am -
1 stop26h 11m
Deal found 8/23![Alaska Airlines logo]()
$390
Last-minute flights from Idaho Falls to SeattleDiscover last-minute flight deals from Idaho Falls to Seattle. Data last updated August 26, 2026 and is based on user searches.
Discover last-minute flight deals from Idaho Falls to Seattle. Data last updated August 26, 2026 and is based on user searches.
This Alaska Airlines deal was found by Cheapflights users on 8/21. 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 9/126:18 am -
Nonstop2h 02m
Sat 9/198:05 pm -
Nonstop1h 51m
Deal found 8/21![Alaska Airlines logo]()
$337
This Expedia deal was found by Cheapflights users on 8/21. 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.
Thu 9/176:18 am -
Nonstop2h 02m
Mon 9/218:05 pm -
Nonstop1h 51m
Deal found 8/21![Alaska Airlines logo]()
$358
This Expedia deal was found by Cheapflights users on 8/23. 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.
Thu 9/246:18 am -
Nonstop2h 02m
Mon 9/2812:28 pm -
Nonstop1h 52m
Deal found 8/23![Alaska Airlines logo]()
$350
This Kiwi.com deal was found by Cheapflights users on 8/24. 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.
Fri 9/256:45 pm -
1 stop15h 57m
Sun 9/279:45 pm -
1 stop12h 49m
Deal found 8/24![Multiple Airlines logo]()
$360
This Expedia deal was found by Cheapflights users on 8/22. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/266:18 am -
Nonstop2h 02m
Sat 10/312:30 pm -
Nonstop1h 50m
Deal found 8/22![Alaska Airlines logo]()
$297
This Vliegwinkel deal was found by Cheapflights users on 8/24. 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 Vliegwinkel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/266:18 am -
Nonstop2h 02m
Mon 9/288:05 pm -
Nonstop1h 51m
Deal found 8/24![Alaska Airlines logo]()
$308
This Alaska Airlines deal was found by Cheapflights users on 8/21. 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 9/282:01 pm -
Nonstop2h 06m
Sat 10/38:10 pm -
Nonstop1h 49m
Deal found 8/21![Alaska Airlines logo]()
$332
One-way flights from Idaho Falls to SeattleSearch for one-way flight options from Idaho Falls to Seattle. Find affordable one-way fares based on user searches. Data last updated August 26, 2026.
Search for one-way flight options from Idaho Falls to Seattle. Find affordable one-way fares based on user searches. Data last updated August 26, 2026.
This Kiwi.com deal was found by Cheapflights users on 8/22. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/146:21 pm -
1 stop16h 21m
Deal found 8/22![Multiple Airlines logo]()
$156
This Kiwi.com deal was found by Cheapflights users on 8/25. 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.
Fri 10/308:28 pm -
1 stop15h 31m
Deal found 8/25![Multiple Airlines logo]()
$160
This Priceline deal was found by Cheapflights users on 8/24. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/306:18 am -
Nonstop2h 02m
Deal found 8/24![Alaska Airlines logo]()
$179
This Kiwi.com deal was found by Cheapflights users on 8/24. 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.
Fri 9/256:45 pm -
1 stop15h 57m
Deal found 8/24![Multiple Airlines logo]()
$182
This Priceline deal was found by Cheapflights users on 8/24. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/242:01 pm -
Nonstop2h 06m
Deal found 8/24![Alaska Airlines logo]()
$199
This Priceline deal was found by Cheapflights users on 8/22. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/126:18 am -
Nonstop2h 02m
Deal found 8/22![Alaska Airlines logo]()
$214
This Priceline deal was found by Cheapflights users on 8/22. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/116:18 am -
Nonstop2h 02m
Deal found 8/22![Alaska Airlines logo]()
$224
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 August 26, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $289 (Alaska Airlines) |
One-way from | $156 (Kiwi.com) |
Popular in | March |
Cheapest in | January |
Average price | $347 |
Good round-trip deal | $414 or less |
Good one-way deal | $255 or less |
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 7,457,451 searches. Data last updated August 26, 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
Cheapest round-trip
Idaho FallsSeattle
IDA Idaho Falls Fanning Field - SEA Seattle/Tacoma Intl
IDASEA
Idaho Falls Fanning Field
Fri 10/30
3:57 pm-8:56 am
2 stops17h 59m
Seattle/Tacoma Intl
Sat 10/31
12:30 pm-3:20 pm
Nonstop1h 50m
$289
Idaho FallsSeattle
IDA Idaho Falls Fanning Field - SEA Seattle/Tacoma Intl
IDASEA
Idaho Falls Fanning Field
Sat 10/10
6:09 am-7:20 am
Nonstop2h 11m
Seattle/Tacoma Intl
Wed 10/14
12:30 pm-3:20 pm
Nonstop1h 50m
$297
Idaho FallsSeattle
IDA Idaho Falls Fanning Field - SEA Seattle/Tacoma Intl
IDASEA
Idaho Falls Fanning Field
Tue 10/20
6:56 pm-10:05 pm
1 stop4h 09m
Seattle/Tacoma Intl
Sun 10/25
11:05 am-6:16 pm
1 stop6h 11m
$332
Quickest round-trip
Idaho FallsSeattle
IDA Idaho Falls Fanning Field - SEA Seattle/Tacoma Intl
IDASEA
Idaho Falls Fanning Field
Mon 9/28
2:01 pm-3:07 pm
Nonstop2h 06m
Seattle/Tacoma Intl
Sat 10/3
8:10 pm-10:59 pm
Nonstop1h 49m
$332
Idaho FallsSeattle
IDA Idaho Falls Fanning Field - SEA Seattle/Tacoma Intl
IDASEA
Idaho Falls Fanning Field
Fri 10/9
6:09 am-7:20 am
Nonstop2h 11m
Seattle/Tacoma Intl
Wed 10/14
12:30 pm-3:20 pm
Nonstop1h 50m
$342
Idaho FallsSeattle
IDA Idaho Falls Fanning Field - SEA Seattle/Tacoma Intl
IDASEA
Idaho Falls Fanning Field
Fri 12/4
1:11 pm-6:43 pm
1 stop6h 32m
Seattle/Tacoma Intl
Mon 12/7
11:00 am-6:16 pm
1 stop6h 16m
$357
Idaho FallsSeattle
IDA Idaho Falls Fanning Field - SEA Seattle/Tacoma Intl
IDASEA
Idaho Falls Fanning Field
Mon 11/2
6:04 am-7:20 am
Nonstop2h 16m
Seattle/Tacoma Intl
Fri 11/6
10:05 am-1:16 pm
1 stop26h 11m
$390
Cheapest one-way
Idaho FallsSeattle
IDA Idaho Falls Fanning Field - SEA Seattle/Tacoma Intl
IDASEA
Idaho Falls Fanning Field
Fri 10/30
8:28 pm-10:59 am
1 stop15h 31m
$160
Idaho FallsSeattle
IDA Idaho Falls Fanning Field - SEA Seattle/Tacoma Intl
IDASEA
Idaho Falls Fanning Field
Thu 9/24
6:57 pm-11:59 pm
1 stop6h 02m
$209
Idaho FallsSeattle
IDA Idaho Falls Fanning Field - SEA Seattle/Tacoma Intl
IDASEA
Idaho Falls Fanning Field
Mon 9/14
6:21 pm-3:08 pm
3 stops45h 47m
$209
Showing 1-10 of 12 resultsSorted by cheapest first
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 August.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars |
- 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.
IDA-SEA
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
Prices
Airlines
How far ahead should I book a flight from Idaho Falls to Seattle?
The best time to book flights from Idaho Falls to Seattle is 23 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 $243). Flying from Idaho Falls to Seattle in March is currently the most expensive (average of $393). 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 August 26, 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.
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 August 26, 2026.
Read through reviews of airlines operating flights from Idaho Falls to Seattle, such as Alaska Airlines and Delta. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Overall
7.9
Crew
8.5
Comfort
7.8
Boarding
8.1
Entertainment
7.0
Food
7.0
Reviews
1 / 20
8.0
ExcellentAnonymous,Jun 2026
RDU - SEA
Overall
7.9
Crew
8.5
Comfort
7.8
Boarding
8.1
Entertainment
7.0
Food
7.0
Reviews
1 / 20
8.0
ExcellentAnonymous,Jun 2026
RDU - SEA
Overall
7.9
Crew
8.5
Comfort
7.8
Boarding
8.1
Entertainment
7.0
Food
7.0
Reviews
1 / 20
8.0
ExcellentAnonymous,Jun 2026
RDU - SEA
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.
Traveling to a place near Seattle?
Book flights to Seattle if you plan to visit one of these locationsSeaTac
Renton
Tacoma
Lacey
Leavenworth
Tukwila
Olympia
Edmonds
Snoqualmie
Lynnwood
Centralia
Puyallup
Kent
Tumwater
Ellensburg
Marysville
Ocean Shores
Lakewood
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Idaho Falls and Seattle flights
Browse other Idaho Falls and Seattle flight options. Last updated on August 26, 2026.
Other flights from Idaho Falls
Browse through other flights departing from Idaho Falls. Flights are based on user searches made on Cheapflights and were last updated on August 26, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Other flights to Seattle
Explore flights to Seattle departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on August 26, 2026.
Top 2 airlines flying from Idaho Falls to Seattle
Discover the top 2 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 7,457,451 searches. Data last updated August 26, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$187 | Average$339 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$214 | Average$627 | FlexibilityNo cancel fee | On-timeN/A |