What is the cheapest airline that flies from San Antonio to Florida Keys?

Southwest, Delta, and American Airlines are the most popular carriers operating from San Antonio to Florida Keys

How many flights depart from San Antonio to Florida Keys on average per week?

As of May 2026, there are 24 flights per week flying from San Antonio to Florida Keys. The most common day of the week flights depart is Mon, with 17% of flights taking off on this day.

What airlines fly to Florida Keys?

American Airlines, Delta and Spirit Airlines are the top three most popular airlines that fly to Florida Keys from San Antonio according to our data. American Airlines is the first choice among our users, with 70% of people opting to fly with this airline when traveling to Florida Keys. Keep in mind that there are 3 different airlines that fly to Florida Keys on a routine basis, so you have a few additional options to choose from.

When did momondo last update prices for flights from San Antonio Airport to Florida Keys?

Prices for flights from San Antonio Airport to Florida Keys are updated daily.

How many operators does momondo search for flights from San Antonio Airport to Florida Keys?

As of May 2026, there are 7 operators available to choose from for flights from San Antonio Airport to Florida Keys.

How old do you have to be to fly from San Antonio Airport to Florida Keys?

The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from San Antonio Airport to Florida Keys.

What documentation or ID do you need to fly to Florida Keys?

The travel and health documents required for your trip to Florida Keys can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Florida Keys. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

$105 Cheap Flights from San Antonio to Florida Keys in 2026

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Find the cheapest flights from San Antonio to Florida Keys

Round-trip

One-way

Last minute

Direct

Cheap round-trip flights

Enter your travel dates to find the best prices.

7:00 am - 4:18 pm

SAT

EYW

8h 18m

1 stop

1:50 pm - 7:26 pm

EYW

SAT

6h 36m

1 stop

$231American Airlines

Wed, Aug 12 - Wed, Aug 26

7:00 am - 7:39 pm

SAT

EYW

11h 39m

2 stops

8:09 pm - 11:59 pm

EYW

SAT

4h 50m

1 stop

$236American Airlines

Wed, Aug 12 - Wed, Aug 26

10:46 am - 5:20 pm

SAT

EYW

5h 34m

1 stop

7:40 am - 1:18 pm

EYW

SAT

6h 38m

1 stop

$241Delta

Wed, Aug 12 - Tue, Aug 18

6:35 am - 6:27 pm

SAT

EYW

10h 52m

2 stops

7:51 pm - 11:23 pm

EYW

SAT

4h 32m

1 stop

$246American Airlines

Wed, Sep 9 - Sat, Sep 12

8:59 pm - 7:26 am

SAT

MIA

9h 27m

1 stop

6:00 am - 6:54 pm

MIA

SAT

13h 54m

1 stop

$250Frontier

Tue, Aug 4 - Thu, Aug 6

7:51 pm - 5:54 am

SAT

MIA

9h 03m

1 stop

6:00 am - 6:54 pm

MIA

SAT

13h 54m

1 stop

$254Frontier

Mon, Jun 29 - Sat, Jul 11

2:01 pm - 10:11 pm

SAT

EYW

7h 10m

1 stop

4:05 pm - 11:08 pm

EYW

SAT

8h 03m

1 stop

$259United Airlines

Sat, Oct 24 - Sat, Oct 31

6:40 am - 3:19 pm

SAT

EYW

7h 39m

1 stop

4:00 pm - 10:57 pm

EYW

SAT

7h 57m

1 stop

$265United Airlines

Wed, Jul 15 - Thu, Jul 23

4:53 pm - 3:27 pm

SAT

EYW

21h 34m

2 stops

8:48 pm - 3:41 pm

EYW

SAT

19h 53m

1 stop

$306Multiple Airlines

Wed, Jul 15 - Thu, Jul 23

10:45 am - 5:11 pm

SAT

EYW

5h 26m

1 stop

7:00 am - 1:22 pm

EYW

SAT

7h 22m

1 stop

$314Delta

Fri, Nov 6 - Tue, Nov 17

American Airlines flights from San Antonio to Florida Keys

Our best American Airlines deals on San Antonio to Florida Keys flight tickets

American Airlines

Aug 12

SAT7:00 amSan Antonio

11h 39m

2 stops

EYW7:39 pmKey West

Aug 26

EYW8:09 pmKey West

4h 50m

1 stop

SAT11:59 pmSan Antonio

$236

American Airlines

Sep 9

SAT6:35 amSan Antonio

10h 52m

2 stops

EYW6:27 pmKey West

Sep 12

EYW7:51 pmKey West

4h 32m

1 stop

SAT11:23 pmSan Antonio

$246

American Airlines

Aug 12

SAT7:00 amSan Antonio

11h 39m

2 stops

EYW7:39 pmKey West

Aug 18

EYW1:50 pmKey West

6h 36m

1 stop

SAT7:26 pmSan Antonio

$282

Delta flights from San Antonio to Florida Keys

Our best Delta deals on San Antonio to Florida Keys flight tickets

Delta

Oct 24

SAT10:45 amSan Antonio

5h 26m

1 stop

EYW5:11 pmKey West

Oct 31

EYW7:00 amKey West

7h 22m

1 stop

SAT1:22 pmSan Antonio

$231

Delta

Aug 12

SAT10:46 amSan Antonio

5h 34m

1 stop

EYW5:20 pmKey West

Aug 18

EYW7:40 amKey West

6h 38m

1 stop

SAT1:18 pmSan Antonio

$241

Delta

Jun 29

SAT7:40 amSan Antonio

5h 03m

1 stop

EYW1:43 pmKey West

Jul 8

EYW7:50 amKey West

6h 42m

1 stop

SAT1:32 pmSan Antonio

$265

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

San AntonioKey West

SAT - EYW

SATEYW

San Antonio

Wed 8/12

7:00 am-4:18 pm

1 stop8h 18m

Key West

Wed 8/26

1:50 pm-7:26 pm

1 stop6h 36m

$231

San AntonioKey West

SAT - EYW

SATEYW

San Antonio

Wed 8/12

7:00 am-7:39 pm

2 stops11h 39m

Key West

Wed 8/26

8:09 pm-11:59 pm

1 stop4h 50m

$236

Quickest round-trip

San AntonioKey West

SAT - EYW

SATEYW

San Antonio

Wed 8/12

10:46 am-5:20 pm

1 stop5h 34m

Key West

Tue 8/18

7:40 am-1:18 pm

1 stop6h 38m

$241

San AntonioKey West

SAT - EYW

SATEYW

San Antonio

Wed 9/9

6:35 am-6:27 pm

2 stops10h 52m

Key West

Sat 9/12

7:51 pm-11:23 pm

1 stop4h 32m

$246

San AntonioMiami

SAT - MIA

SATMIA

San Antonio

Tue 8/4

8:59 pm-7:26 am

1 stop9h 27m

Miami

Thu 8/6

6:00 am-6:54 pm

1 stop13h 54m

$250

San AntonioMiami

SAT - MIA

SATMIA

San Antonio

Mon 6/29

7:51 pm-5:54 am

1 stop9h 03m

Miami

Sat 7/11

6:00 am-6:54 pm

1 stop13h 54m

$254

San AntonioKey West

SAT - EYW

SATEYW

San Antonio

Sat 10/24

2:01 pm-10:11 pm

1 stop7h 10m

Key West

Sat 10/31

4:05 pm-11:08 pm

1 stop8h 03m

$259

San AntonioKey West

SAT - EYW

SATEYW

San Antonio

Wed 7/15

6:40 am-3:19 pm

1 stop7h 39m

Key West

Thu 7/23

4:00 pm-10:57 pm

1 stop7h 57m

$265

San AntonioKey West

SAT - EYW

SATEYW

San Antonio

Wed 7/15

4:53 pm-3:27 pm

2 stops21h 34m

Key West

Thu 7/23

8:48 pm-3:41 pm

1 stop19h 53m

$306

San AntonioKey West

SAT - EYW

SATEYW

San Antonio

Fri 11/6

10:45 am-5:11 pm

1 stop5h 26m

Key West

Tue 11/17

7:00 am-1:22 pm

1 stop7h 22m

$314

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

How to get the cheapest flight ticket from San Antonio to Florida Keys

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

Prices

Airlines

Other information

What is the cheapest month to fly to Florida Keys?

The month of April is another great option to travel to Florida Keys, with average flight prices from San Antonio averaging around $68.

What is the cheapest day to depart on your flight to Florida Keys?

The cheapest day to depart from San Antonio to Florida Keys is on a Friday when prices can be found for as low as $513. The most expensive day to fly to Florida Keys is Sunday, with ticket prices averaging around $587.

What is the cheapest time of day to depart on your flight to Florida Keys?

According to our data, the cheapest time of day to fly to Florida Keys is in the afternoon. momondo users have found flights departing from San Antonio to Florida Keys in the afternoon for as low as $455. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. Flights in the evening are often more expensive with an average ticket price of $754.

How far in advance should I book a flight from San Antonio to Florida Keys?

You are more likely to see cheaper flights to Florida Keys from San Antonio when booking weeks ahead of your departure date. In general, you can expect to find flights to Florida Keys for around $397 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Florida Keys from San Antonio for as low as $307 on momondo.

Can stopping save me money on San Antonio to Florida Keys flights?

No. A direct flight is the cheapest option for a flight between San Antonio to Florida Keys.

Cheap San Antonio to Florida Keys flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from San Antonio to Florida Keys

Fastest flight time	2h 46m
Direct flights	Every day
Airports in Florida Keys	3 airports

The fastest flight from San Antonio to Florida Keys takes 2h 46m

Direct flights go from San Antonio to Florida Keys every day.

There are 3 airports in Florida Keys. From San Antonio there are direct flights to Miami (MIA).

Search flight deals

Frequently asked questions about flying from San Antonio to Florida Keys

When did momondo last update prices for flights from San Antonio Airport to Florida Keys?
Prices for flights from San Antonio Airport to Florida Keys are updated daily.
How many operators does momondo search for flights from San Antonio Airport to Florida Keys?
As of May 2026, there are 7 operators available to choose from for flights from San Antonio Airport to Florida Keys.
How old do you have to be to fly from San Antonio Airport to Florida Keys?
The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from San Antonio Airport to Florida Keys.
What documentation or ID do you need to fly to Florida Keys?
The travel and health documents required for your trip to Florida Keys can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Florida Keys. We always recommend checking with your airline or a trusted third party such as IATA to get advice.
What is the most popular plane model from San Antonio to Florida Keys?
momondo data reveals that the most frequently booked plane model on the route from San Antonio to Florida Keys is Boeing 737 MAX 8, representing 18.87% of all bookings. The subsequent popular models are Airbus A320-100/200 at 16.57%, Boeing 737-800 Passenger/BBJ2 (winglets) at 10.60%, and Airbus A319 at 8.78%.

Best airlines flying from San Antonio to Florida Keys

Compare and see reviews for airlines that fly from San Antonio to Florida Keys with momondo

Airline	Rating	Free Cancellation	Price
American Airlines	PriceFrom $224	Free Cancellation	Rating 7.1 11,667 reviews		Search American Airlines flights
Delta	PriceFrom $227	Free Cancellation	Rating 7.9 8,451 reviews		Search Delta flights

Why use momondo?

Why should I use momondo to find a flight deal from San Antonio to Florida Keys?

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from San Antonio to Florida Keys. momondo saves you time and could save you money on your trip.

Can I find flights from San Antonio to Florida Keys with flexible booking policies on momondo?

Yes. momondo allows you to filter the results for San Antonio to Florida Keys flights to just show those with flexible booking policies.

How can momondo help me find flights from San Antonio to Florida Keys?

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from San Antonio to Florida Keys.

I’m not ready to book a flight from San Antonio to Florida Keys right now. Can momondo alert me if prices change?

If you are simply researching potential flights to Florida Keys, momondo offers a useful price alert feature which will track prices for flights to Florida Keys from San Antonio and alert you when they change.