$119 Cheap Delta flights Idaho Falls (IDA) to Seattle (SEA)

View $119 flight on Wed, Sep 17, 2025Opens in a new window

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$119 Cheap Delta flights Idaho Falls (IDA) to Seattle (SEA)

Prices were available within the past 7 days and start at $119 for one-way flights and $197 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Delta
Wed, Sep 17 - Tue, Sep 23
IDA
Idaho Falls
SEA
Seattle
$197 Roundtrip, found 5 hours ago
$197
Roundtrip
found 5 hours ago
Select Delta flight, departing Wed, Sep 17 from Idaho Falls to Seattle, returning Tue, Sep 23, priced at $197 found 5 hours ago
Delta
Tue, Sep 16 - Tue, Sep 23
IDA
Idaho Falls
SEA
Seattle
$217 Roundtrip, found 5 hours ago
$217
Roundtrip
found 5 hours ago
Select Delta flight, departing Tue, Sep 16 from Idaho Falls to Seattle, returning Tue, Sep 23, priced at $217 found 5 hours ago
Delta
Sat, Oct 11 - Wed, Oct 15
IDA
Idaho Falls
SEA
Seattle
$230 Roundtrip, found 6 hours ago
$230
Roundtrip
found 6 hours ago
Select Delta flight, departing Sat, Oct 11 from Idaho Falls to Seattle, returning Wed, Oct 15, priced at $230 found 6 hours ago
Delta
Sat, Oct 25 - Mon, Oct 27
IDA
Idaho Falls
SEA
Seattle
$249 Roundtrip, found 2 days ago
$249
Roundtrip
found 2 days ago
Select Delta flight, departing Sat, Oct 25 from Idaho Falls to Seattle, returning Mon, Oct 27, priced at $249 found 2 days ago
Delta
Sat, Dec 6 - Sat, Dec 13
IDA
Idaho Falls
SEA
Seattle
$260 Roundtrip, found 2 days ago
$260
Roundtrip
found 2 days ago
Select Delta flight, departing Sat, Dec 6 from Idaho Falls to Seattle, returning Sat, Dec 13, priced at $260 found 2 days ago
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Flights from Idaho Falls (IDA) to Seattle (SEA)
Origin airport
Idaho Falls Regional
Destination airport
Seattle - Tacoma Intl.
Airlines serving
Alaska Airlines, American Airlines, Delta, Hawaiian Airlines, United
Popular airline
Alaska Airlines
Distance
564 mi

Frequently asked questions

How much is a Delta Air Lines flight from Idaho Falls Regional Airport (IDA) to Seattle - Tacoma Intl. Airport (SEA)?
Finding cheap one-way Delta Air Lines flights from IDA to SEA from $119 on Expedia couldn't be easier — just filter by "Price (lowest to highest)." Or check out our budget-friendly return fares from $197 for your next exciting adventure.**These prices were available on Expedia within the past 7 days, for flights departing within the next year. Prices and availability are subject to change. Additional terms apply.
What is the cheapest month to fly from IDA to SEA with Delta Air Lines?
Delta Air Lines flights to Seattle are often cheaper in the low-season months of January and February. Whether you're after a return or one-way ticket, you could score a better deal then.
What is the cheapest time to book flights from Idaho Falls Regional Airport (IDA) to Seattle - Tacoma Intl. Airport (SEA) with Delta Air Lines?
Begin your search one to three months ahead of your departure date to find cheaper fares on Delta Air Lines flights from Idaho Falls Regional Airport (IDA) to Seattle - Tacoma Intl. Airport (SEA). You can save 25% by booking your domestic flight 34 to 86 days in advance versus last-minute reservations made 6 to 12 days out. You could also cut costs by buying your fare on a Sunday, as it's 6% cheaper on average than a Monday, the most expensive day to book.* Time it well, and you can enjoy significant savings on domestic flights.*Ideal booking window recommendation is based on average round-trip ticket prices for January through November for 2024. Best day of the week to book recommendation is based on average round-trip ticket prices for January through October 2024. All data sourced from ARC's global airline sales database.
Does Delta Air Lines fly nonstop from Idaho Falls Regional Airport (IDA) to Seattle - Tacoma Intl. Airport (SEA)?
Click on our "Nonstop" filter when looking for direct Delta Air Lines flights from IDA to SEA. It's also an easy way to compare other carriers offering the same direct route.
What is the earliest Delta Air Lines flight from IDA to SEA?
To find the earliest departure from IDA to SEA with Delta Air Lines, filter your results by "Early Morning" and "Morning." Choosing an early flight usually means cancellations are less likely.**Most reliable time of the day recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
What airports does Delta Air Lines fly into in Seattle?
Get on a Delta Air Lines flight from Idaho Falls Regional Airport (IDA) to Seattle, and you're most likely to come in to Seattle - Tacoma Intl. Airport (SEA). This is the airline's main hub in this city.
Why fly with Delta Air Lines from IDA to SEA?
With an excellent in-flight experience and a rewarding loyalty program, Delta Air Lines is a top choice for many passengers flying from IDA to SEA. What's more, if you're a Delta SkyMiles and One Key™ member booking with Expedia, you could earn OneKeyCash™* on eligible flights on top of your airline miles, which can be used on future travel.*OneKeyCash™ disclaimer - OneKeyCash™ is not redeemable for cash and can only be used on Expedia, Hotels.com and Vrbo.
Can I change or cancel my Delta Air Lines flight from Idaho Falls Regional Airport (IDA) to Seattle - Tacoma Intl. Airport (SEA)?
Depending on the type of ticket you purchased, a fee typically applies if you cancel or change your flight more than 24 hours after it's confirmed. To secure flexible fares, select our "Changes included" and "No cancel fee" boxes when you look for flights. For more information on changing or canceling your reservation, go to "Trips," select your flight and tick "Manage Booking."

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*Available to One Key members.