$100 Cheap Flights from San Antonio (SAT) to Key West (EYW)

View $100 flight on Sun, Aug 31, 2025Opens in a new window

Popular airlines from San Antonio International Airport (SAT) to Key West Intl. Airport (EYW)

Find available prices by choosing your travel dates.

Cheap Flights from San Antonio to Key West (SAT-EYW)

Prices were available within the past 7 days and start at $100 for one-way flights and $199 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Delta
Sun, May 25 - Wed, May 28
SAT
San Antonio
EYW
Key West
$199 Roundtrip, found 1 day ago
$199
Roundtrip
found 1 day ago
Select Delta flight, departing Sun, May 25 from San Antonio to Key West, returning Wed, May 28, priced at $199 found 1 day ago
American Airlines
Sun, May 25 - Thu, May 29
SAT
San Antonio
EYW
Key West
$200 Roundtrip, found 2 days ago
$200
Roundtrip
found 2 days ago
Select American Airlines flight, departing Sun, May 25 from San Antonio to Key West, returning Thu, May 29, priced at $200 found 2 days ago
Delta
Sat, Jul 5 - Wed, Jul 23
SAT
San Antonio
EYW
Key West
$229 Roundtrip, just found
$229
Roundtrip
just found
Select Delta flight, departing Sat, Jul 5 from San Antonio to Key West, returning Wed, Jul 23, priced at $229 just found
Delta
Thu, May 29 - Wed, Jun 11
SAT
San Antonio
EYW
Key West
$238 Roundtrip, found 3 days ago
$238
Roundtrip
found 3 days ago
Select Delta flight, departing Thu, May 29 from San Antonio to Key West, returning Wed, Jun 11, priced at $238 found 3 days ago
American Airlines
Sun, May 25 - Thu, May 29
SAT
San Antonio
EYW
Key West
$241 Roundtrip, found 2 days ago
$241
Roundtrip
found 2 days ago
Select American Airlines flight, departing Sun, May 25 from San Antonio to Key West, returning Thu, May 29, priced at $241 found 2 days ago
Delta
Mon, Jun 23 - Tue, Jul 1
SAT
San Antonio
EYW
Key West
$244 Roundtrip, found 2 days ago
$244
Roundtrip
found 2 days ago
Select Delta flight, departing Mon, Jun 23 from San Antonio to Key West, returning Tue, Jul 1, priced at $244 found 2 days ago
American Airlines
Sun, May 25 - Thu, May 29
SAT
San Antonio
EYW
Key West
$249 Roundtrip, found 2 days ago
$249
Roundtrip
found 2 days ago
Select American Airlines flight, departing Sun, May 25 from San Antonio to Key West, returning Thu, May 29, priced at $249 found 2 days ago
Delta
Sun, May 25 - Tue, Jun 10
SAT
San Antonio
EYW
Key West
$253 Roundtrip, found 6 days ago
$253
Roundtrip
found 6 days ago
Select Delta flight, departing Sun, May 25 from San Antonio to Key West, returning Tue, Jun 10, priced at $253 found 6 days ago
Delta
Mon, Jul 7 - Wed, Jul 23
SAT
San Antonio
EYW
Key West
$259 Roundtrip, just found
$259
Roundtrip
just found
Select Delta flight, departing Mon, Jul 7 from San Antonio to Key West, returning Wed, Jul 23, priced at $259 just found
United
Mon, Oct 27 - Wed, Nov 12
SAT
San Antonio
EYW
Key West
$339 Roundtrip, found 2 days ago
$339
Roundtrip
found 2 days ago
Select United flight, departing Mon, Oct 27 from San Antonio to Key West, returning Wed, Nov 12, priced at $339 found 2 days ago
Flights from San Antonio (SAT) to Key West (EYW)
Origin airport
San Antonio Intl.
Destination airport
Key West Intl.
Airlines serving
American Airlines, Delta, United
Roundtrip price
$198
Distance
1083 mi

San Antonio to Key West Flights

The cheapest times to fly from San Antonio 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 San Antonio to Key West are during the month of May. You can find some of the cheapest flights from San Antonio to Key West with Expedia's search tool and vast selection of airlines.

The best time to book a flight from San Antonio to Key West

Sunday is one of the best days to book for cheap flights from San Antonio 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 San Antonio 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 San Antonio to Key West in 2025. You can also book with separate airlines for your outbound and return journeys, from $100 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 San Antonio 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 San Antonio 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.

Frequently asked questions

How much does a flight from San Antonio Intl. Airport (SAT) to Key West Intl. Airport (EYW) cost?
Discover the latest flight deals from SAT to EYW by entering your preferred travel dates and searching on Expedia. Easily compare prices by departure date if you have flexibility with your schedule and use handy filters to explore prices for your preferred journey. As a member of One Key™, our free loyalty program, you can use Price Tracking to watch fares and receive notifications if prices go up or down.
What is the cheapest month to fly from SAT to EYW?
The cheapest flights from SAT to EYW are usually during off-peak season, when demand is lower. To save money, avoid flying during public holidays, school breaks and major local events.
What is the cheapest airline that flies from SAT to EYW?
Use the filter tool on Expedia to compare airlines and find the cheapest carrier that’ll take you from SAT to EYW. Sort your results by “Price (lowest to highest)” to snap up a great deal.
How many flights per day from San Antonio Intl. Airport (SAT) to Key West Intl. Airport (EYW)?
Direct flights from San Antonio Intl. Airport (SAT) to Key West Intl. Airport (EYW) aren’t available daily, so you’ll have to take a flight with a layover. Explore your options with Expedia’s filters. Enter your travel details and click on either “1 Stop” or “2+ Stops.”
What day of the week has the most flights from SAT to EYW?
You’ll usually find Tuesday the quietest day for flights, while Fridays are often the busiest.* However this can change from season to season and during peak travel times or public holidays.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from San Antonio Intl. Airport (SAT) to Key West Intl. Airport (EYW)?
To arrive at Key West Intl. Airport (EYW) without delays, opt for a flight that leaves from San Antonio Intl. Airport (SAT) before 3 PM. The likelihood of cancellations is 22% higher, on average, for departures after this hour.**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 San Antonio Intl. Airport (SAT) to Key West Intl. Airport (EYW) last-minute?
Booking your flight from SAT to EYW shortly before your trip is generally more expensive. But if there’s some wiggle room with your schedule, you could snag a cheap last-minute fare.
Is it cheaper to book a SAT to EYW flight and hotel package?
Booking a SAT to EYW flight and hotel package is usually cheaper than booking separately. With Expedia, you can enjoy the convenience of organizing your trip in one place. Select from our impressive range of hotels and then add car rentals, flights and activities to your booking. Bundle everything together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from San Antonio Intl. Airport (SAT) to Key West Intl. Airport (EYW)?
It’s generally possible to reschedule or cancel your SAT to EYW flight. However, if the booking was made more than 24 hours ago, additional charges may apply. Refer to your airline’s policies in your itinerary to see what changes are allowed and whether any costs are involved. You’ll also find further details on our Customer Service portal.

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*Available to One Key members.