$99 Cheap Flights from Idaho Falls (IDA) to Seattle (SEA)

View $99 flight on Tue, Jun 17, 2025Opens in a new window

Popular airlines from Idaho Falls Regional Airport (IDA) to Seattle-Tacoma International Airport (SEA)

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Find available prices by choosing your travel dates.

Cheap Flights from Idaho Falls to Seattle (IDA-SEA)

Prices were available within the past 7 days and start at $99 for one-way flights and $197 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Alaska Airlines
Tue, Jun 3 - Tue, Jun 10
IDA
Idaho Falls
SEA
Seattle
$197 Roundtrip, found 7 hours ago
$197
Roundtrip
found 7 hours ago
Select Alaska Airlines flight, departing Tue, Jun 3 from Idaho Falls to Seattle, returning Tue, Jun 10, priced at $197 found 7 hours ago
Hawaiian Airlines
Thu, May 15 - Tue, May 20
IDA
Idaho Falls
SEA
Seattle
$207 Roundtrip, found 5 hours ago
$207
Roundtrip
found 5 hours ago
Select Hawaiian Airlines flight, departing Thu, May 15 from Idaho Falls to Seattle, returning Tue, May 20, priced at $207 found 5 hours ago
Delta
Tue, Jun 3 - Tue, Jun 10
IDA
Idaho Falls
SEA
Seattle
$210 Roundtrip, found 7 hours ago
$210
Roundtrip
found 7 hours ago
Select Delta flight, departing Tue, Jun 3 from Idaho Falls to Seattle, returning Tue, Jun 10, priced at $210 found 7 hours ago
Delta
Tue, Jun 3 - Tue, Jun 10
IDA
Idaho Falls
SEA
Seattle
$217 Roundtrip, found 7 hours ago
$217
Roundtrip
found 7 hours ago
Select Delta flight, departing Tue, Jun 3 from Idaho Falls to Seattle, returning Tue, Jun 10, priced at $217 found 7 hours ago
Alaska Airlines
Thu, May 22 - Sun, May 25
IDA
Idaho Falls
SEA
Seattle
$217 Roundtrip, just found
$217
Roundtrip
just found
Select Alaska Airlines flight, departing Thu, May 22 from Idaho Falls to Seattle, returning Sun, May 25, priced at $217 just found
Alaska Airlines
Fri, Jun 6 - Tue, Jun 10
IDA
Idaho Falls
SEA
Seattle
$219 Roundtrip, found 4 days ago
$219
Roundtrip
found 4 days ago
Select Alaska Airlines flight, departing Fri, Jun 6 from Idaho Falls to Seattle, returning Tue, Jun 10, priced at $219 found 4 days ago
Delta
Wed, May 28 - Sat, May 31
IDA
Idaho Falls
SEA
Seattle
$220 Roundtrip, found 4 hours ago
$220
Roundtrip
found 4 hours ago
Select Delta flight, departing Wed, May 28 from Idaho Falls to Seattle, returning Sat, May 31, priced at $220 found 4 hours ago
Delta
Mon, Jun 9 - Wed, Jun 11
IDA
Idaho Falls
SEA
Seattle
$227 Roundtrip, found 8 hours ago
$227
Roundtrip
found 8 hours ago
Select Delta flight, departing Mon, Jun 9 from Idaho Falls to Seattle, returning Wed, Jun 11, priced at $227 found 8 hours ago
Alaska Airlines
Thu, May 15 - Mon, May 19
IDA
Idaho Falls
SEA
Seattle
$227 Roundtrip, found 7 hours ago
$227
Roundtrip
found 7 hours ago
Select Alaska Airlines flight, departing Thu, May 15 from Idaho Falls to Seattle, returning Mon, May 19, priced at $227 found 7 hours ago
American Airlines
Tue, Dec 16 - Tue, Jan 6
IDA
Idaho Falls
SEA
Seattle
$429 Roundtrip, found 4 days ago
$429
Roundtrip
found 4 days ago
Select American Airlines flight, departing Tue, Dec 16 from Idaho Falls to Seattle, returning Tue, Jan 6, priced at $429 found 4 days ago
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
Roundtrip price
$191
Distance
564 mi

Idaho Falls to Seattle Flights

The cheapest times to fly from Idaho Falls to Seattle

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Idaho Falls to Seattle are during the month of June. You can find some of the cheapest flights from Idaho Falls to Seattle with Expedia's search tool and vast selection of airlines.

The best time to book a flight from Idaho Falls to Seattle

Sunday is one of the best days to book for cheap flights from Idaho Falls to Seattle: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

How to find cheap round-trip tickets from Idaho Falls to Seattle

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Idaho Falls to Seattle in 2025. You can also book with separate airlines for your outbound and return journeys, from $99 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Idaho Falls to Seattle flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

You could also save big by booking one of Expedia's vacation packages. Bundling together your Idaho Falls to Seattle airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

*Terms apply.

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

Frequently asked questions

How much does a flight from Idaho Falls Regional Airport (IDA) to Seattle - Tacoma Intl. Airport (SEA) cost?
Pick up cheap return fares starting at $197 from Idaho Falls Regional Airport (IDA) to Seattle - Tacoma Intl. Airport (SEA). This information is based on the cheapest price found on Expedia for this return journey departing within the next three months. This airfare is for a Alaska Airlines flight leaving IDA on May 18 2025 and touching down at SEA. The price was last updated on April 23 2025 and has not changed since.
What is the cheapest month to fly from IDA to SEA?
The cheapest flights from IDA to SEA are usually during off-peak season, when demand is lower. To save money, avoid flying during public holidays, school breaks and major local events.
Which airlines fly direct from Idaho Falls Regional Airport (IDA) to Seattle - Tacoma Intl. Airport (SEA)?
When departing from Idaho Falls Regional Airport (IDA), you can get on a nonstop flight to Seattle - Tacoma Intl. Airport (SEA) with Alaska Airlines.
What is the cheapest airline that flies from IDA to SEA?
Right now, the cheapest airline operating one-way flights from IDA to SEA is Alaska Airlines. You can jet off on this route from $99. This fare is based on the lowest price found on Expedia departing within the next three months. The flight takes off from IDA on June 17 2025. Prices were last updated on April 23 2025 and have not changed since.
How many flights per day from Idaho Falls Regional Airport (IDA) to Seattle - Tacoma Intl. Airport (SEA)?
On average, you’ll only find 1 direct flight departing from Idaho Falls Regional Airport (IDA) to Seattle - Tacoma Intl. Airport (SEA) every day. If this isn’t convenient for you, consider flights with a layover. Just filter your search on Expedia to include one or more stops to discover the next best option.
What are the most popular departure times for flights from Idaho Falls Regional Airport (IDA) to Seattle - Tacoma Intl. Airport (SEA)?
Flights between IDA and SEA are busiest at 8 AM. If you’d like a more relaxed experience and potentially cheaper prices, look for a time when demand is lower.
What day of the week has the most flights from IDA to SEA?
Depart on a Friday if you’re looking for the best selection of flights from Idaho Falls Regional Airport (IDA) to Seattle - Tacoma Intl. Airport (SEA).
What is the earliest flight from Idaho Falls Regional Airport (IDA) to Seattle - Tacoma Intl. Airport (SEA)?
The first flight of the day jetting off from Idaho Falls Regional Airport (IDA) is at around 8:00AM UTC-7. Hop on this flight and you’ll land at Seattle - Tacoma Intl. Airport (SEA) at approximately 9:10AM UTC-8. The entire trip takes 2h 10m.
How long does it take to fly from Idaho Falls Regional Airport (IDA) to Seattle - Tacoma Intl. Airport (SEA)?
The average flight duration from IDA to SEA is 2 hours and 4 minutes, covering a total distance of 570 mi.
What is the best time to fly from Idaho Falls Regional Airport (IDA) to Seattle - Tacoma Intl. Airport (SEA)?
To avoid potential delays on the Idaho Falls Regional Airport (IDA) to Seattle - Tacoma Intl. Airport (SEA) route, fly before 3 PM. Later flights are 22% more likely to be canceled.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG’s global flight data platform.
What airports do you fly into for Seattle from Idaho Falls Regional Airport (IDA)?
Browse your flight options from Idaho Falls Regional Airport (IDA) to Seattle - Tacoma Intl. Airport (SEA). This is the only airport in Seattle you can fly into if you’re taking a direct flight.
Is it cheaper to buy a plane ticket from Idaho Falls Regional Airport (IDA) to Seattle - Tacoma Intl. Airport (SEA) last-minute?
Holding off until just before your departure to book a ticket from IDA to SEA often results in higher prices. While it’s possible to find some last-minute deals, there’s no guarantee. Be flexible with your itinerary to maximize your chances of landing a bargain.
Is it cheaper to book an IDA to SEA flight and hotel package?
Compared with arranging flights and hotels separately, booking an IDA to SEA flight and hotel package with Expedia could lead to significant savings. Better still, having it all in one place will take the hassle out of planning your trip. Just pick your flights and select from our extensive range of stays, then personalize your trip with extras like tours, car rentals and activities.
Can I cancel or change the date of my flight from Idaho Falls Regional Airport (IDA) to Seattle - Tacoma Intl. Airport (SEA)?
If you reserved your IDA to SEA flight in the last 24 hours, you may be able to cancel or modify it without fees. Depending on the airline and the ticket type you purchased, additional charges may apply for changes after that time. Airline policies and contact information can be found in your itinerary or confirmation email. Or, go to our Customer Service portal for more details.

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*Available to One Key members.