$409 Cheap Flights from Great Falls (GTF) to Key West (EYW)

View $409 flight on Sun, Apr 5, 2026Opens in a new window

Popular airlines from Great Falls, MT (GTF-Great Falls Intl.) to Key West Intl. Airport (EYW)

Cheap Flights from Great Falls to Key West (GTF-EYW)

Prices were available within the past 7 days and start at $409 for one-way flights and $507 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Delta
Mon, Apr 13 - Thu, Apr 30
GTF
Great Falls
EYW
Key West
$507 Roundtrip, found 22 hours ago
$507
Roundtrip
found 22 hours ago
Select Delta flight, departing Mon, Apr 13 from Great Falls to Key West, returning Thu, Apr 30, priced at $507 found 22 hours ago
Delta
Tue, Jan 13 - Tue, Jan 27
GTF
Great Falls
EYW
Key West
$512 Roundtrip, found 19 hours ago
$512
Roundtrip
found 19 hours ago
Select Delta flight, departing Tue, Jan 13 from Great Falls to Key West, returning Tue, Jan 27, priced at $512 found 19 hours ago
Delta
Fri, Jan 23 - Wed, Feb 4
GTF
Great Falls
EYW
Key West
$522 Roundtrip, found 19 hours ago
$522
Roundtrip
found 19 hours ago
Select Delta flight, departing Fri, Jan 23 from Great Falls to Key West, returning Wed, Feb 4, priced at $522 found 19 hours ago
Delta
Sat, Apr 18 - Thu, Apr 30
GTF
Great Falls
EYW
Key West
$527 Roundtrip, found 22 hours ago
$527
Roundtrip
found 22 hours ago
Select Delta flight, departing Sat, Apr 18 from Great Falls to Key West, returning Thu, Apr 30, priced at $527 found 22 hours ago
Delta
Wed, Jan 7 - Wed, Jan 21
GTF
Great Falls
EYW
Key West
$537 Roundtrip, found 19 hours ago
$537
Roundtrip
found 19 hours ago
Select Delta flight, departing Wed, Jan 7 from Great Falls to Key West, returning Wed, Jan 21, priced at $537 found 19 hours ago
Delta
Tue, Jan 20 - Wed, Feb 4
GTF
Great Falls
EYW
Key West
$542 Roundtrip, found 19 hours ago
$542
Roundtrip
found 19 hours ago
Select Delta flight, departing Tue, Jan 20 from Great Falls to Key West, returning Wed, Feb 4, priced at $542 found 19 hours ago
Delta
Sat, Apr 18 - Tue, Apr 28
GTF
Great Falls
EYW
Key West
$547 Roundtrip, found 22 hours ago
$547
Roundtrip
found 22 hours ago
Select Delta flight, departing Sat, Apr 18 from Great Falls to Key West, returning Tue, Apr 28, priced at $547 found 22 hours ago
Delta
Tue, Feb 3 - Thu, Feb 19
GTF
Great Falls
EYW
Key West
$552 Roundtrip, found 22 hours ago
$552
Roundtrip
found 22 hours ago
Select Delta flight, departing Tue, Feb 3 from Great Falls to Key West, returning Thu, Feb 19, priced at $552 found 22 hours ago
United
Sat, Jan 24 - Wed, Feb 4
GTF
Great Falls
EYW
Key West
$559 Roundtrip, found 19 hours ago
$559
Roundtrip
found 19 hours ago
Select United flight, departing Sat, Jan 24 from Great Falls to Key West, returning Wed, Feb 4, priced at $559 found 19 hours ago
Delta
Thu, Jan 8 - Tue, Jan 20
GTF
Great Falls
EYW
Key West
$562 Roundtrip, found 19 hours ago
$562
Roundtrip
found 19 hours ago
Select Delta flight, departing Thu, Jan 8 from Great Falls to Key West, returning Tue, Jan 20, priced at $562 found 19 hours ago

Alternative airports near Key West

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Key West Intl. EYW. Cheapest and Closest option available. Average driving time to city center is 8 minutes. Flights from $961
EYW
Key West Intl.
CheapestClosest
Average driving time to city center8 min
Flights from $961

Frequently asked questions

How much does a flight from Great Falls Intl. Airport (GTF) to Key West Intl. Airport (EYW) cost?
Grab a cheap one-way flight from $409 or cheap return flight from $507 from Great Falls Intl. Airport (GTF) to Key West Intl. Airport (EYW) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to find our cheapest flight offers on this route.
What is the cheapest month to fly from Great Falls Intl. Airport (GTF) to Key West Intl. Airport (EYW)?
Planning your trip for April is a great way to save, as it's the cheapest month for flights between GTF and EYW. You'll typically find the lowest fares during off-peak months.
What is the cheapest airline that flies from Great Falls Intl. Airport (GTF) to Key West Intl. Airport (EYW)?
To find the cheapest airline flying from GTF to EYW, use Expedia's filter tool. Tailor your search based on what matters most to you, such as preferred carriers and ideal departure window. You can then sort your results by "Price (lowest to highest)" to see the cheapest flights first.
How many flights per day from Great Falls Intl. Airport (GTF) to Key West Intl. Airport (EYW)?
There aren't any daily direct flights from Great Falls Intl. Airport (GTF) to Key West Intl. Airport (EYW). But you can choose flights with layovers. Filter your search on Expedia to include one or two stops, and you'll be cruising above the clouds in no time at all.
What day of the week has the most flights from GTF to EYW?
Generally you'll find the widest variety of flight choices on a Friday. Tuesdays are often the quietest.* But this can vary depending on the time of year, airline and other factors.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Great Falls Intl. Airport (GTF) to Key West Intl. Airport (EYW)?
Opt for a flight from Great Falls Intl. Airport (GTF) to Key West Intl. Airport (EYW) that leaves before 3 PM to reduce the risk of delays and cancellations. Later departures have a 22% higher chance of being canceled, on average.**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.
Is it cheaper to buy a plane ticket from Great Falls Intl. Airport (GTF) to Key West Intl. Airport (EYW) last-minute?
Last-minute bookings from GTF to EYW are generally more expensive. To secure the lowest prices, start searching for flights as early as possible. That said, if your travel plans are flexible, you may find a cheap fare just before your departure.
Is it cheaper to book a GTF to EYW flight and hotel package?
Booking a GTF to EYW flight and hotel package is generally cheaper than booking separately. With Expedia, you can enjoy the convenience of organizing your travels in one place. Pick from our extensive range of stays and then add flights, car rentals and activities to your booking. Bundle it all together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Great Falls Intl. Airport (GTF) to Key West Intl. Airport (EYW)?
Typically, you can reschedule or cancel your GTF to EYW flight. However, additional fees may apply, especially if you booked over 24 hours ago. Check your itinerary for the airline's policies and fees on flight changes, or if you'd like further details, visit our Customer Service portal.

Travel information

Origin airport
Great Falls Intl.
Destination airport
Key West Intl.
Airlines serving
Delta, United
Roundtrip price
$506
Distance
2264 mi

Book with confidence

Great Falls to Key West Flights

The cheapest times to fly from Great Falls to Key West

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 Great Falls to Key West are during the month of April. You can find some of the cheapest flights from Great Falls to Key West with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Great Falls to Key West

Sunday is one of the best days to book for cheap flights from Great Falls to Key West: 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 Great Falls to Key West

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 Great Falls to Key West in 2025. You can also book with separate airlines for your outbound and return journeys, from $409 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 Great Falls to Key West 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 Great Falls to Key West 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.

 

Great Falls to Key West Flights

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*Available to One Key members.