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

Southwest, Delta, and United 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 August 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.

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 August 2026, there are 6 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.

$74 Cheap Flights from San Antonio to Florida Keys in 2026

Discover deals from 900+ travel sites with momondo.

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.

8:26 pm - 4:52 amSAT San Antonio-MIA Miami

7h 26m1 stop Denver Intl

5:50 am - 7:25 pmMIA Miami-SAT San Antonio

14h 35m1 stop Denver Intl

$143Frontier

Sun, Sep 6 - Fri, Sep 11

8:26 pm - 4:52 amSAT San Antonio-MIA Miami

7h 26m1 stop Denver Intl

5:50 am - 7:25 pmMIA Miami-SAT San Antonio

14h 35m1 stop Denver Intl

$158Frontier

Tue, Sep 8 - Wed, Sep 16

6:50 am - 3:30 pmSAT San Antonio-MIA Miami

7h 40m1 stop Nashville Intl

6:05 pm - 11:10 pmMIA Miami-SAT San Antonio

6h 05m1 stop Nashville Intl

$216Southwest

Wed, Sep 16 - Wed, Sep 16

10:45 am - 6:30 pmSAT San Antonio-MIA Miami

6h 45m1 stop Denver Intl

8:00 pm - 12:40 amMIA Miami-SAT San Antonio

5h 40m1 stop Nashville Intl

$216Southwest

Mon, Oct 19 - Mon, Oct 26

11:08 am - 5:48 amSAT San Antonio-MIA Miami

17h 40m1 stop Denver Intl

9:00 am - 11:58 amMIA Miami-SAT San Antonio

27h 58m2 stops Raleigh-Durham Memphis

$262Multiple Airlines

Sat, Nov 7 - Sun, Nov 15

6:10 pm - 12:55 amSAT San Antonio-MIA Miami

5h 45m1 stop Atlanta Hartsfield-Jackson

7:40 pm - 12:08 amMIA Miami-SAT San Antonio

5h 28m1 stop Atlanta Hartsfield-Jackson

$277Delta

Thu, Sep 17 - Mon, Sep 28

1:20 pm - 10:56 pmSAT San Antonio-MIA Miami

8h 36m1 stop New York John F Kennedy Intl

6:00 am - 12:35 pmMIA Miami-SAT San Antonio

7h 35m1 stop Atlanta Hartsfield-Jackson

$277Delta

Mon, Nov 2 - Sat, Nov 7

7:56 pm - 5:48 amSAT San Antonio-MIA Miami

8h 52m1 stop Denver Intl

9:00 am - 11:58 amMIA Miami-SAT San Antonio

27h 58m2 stops Raleigh-Durham Memphis

$278Multiple Airlines

Sun, Nov 8 - Sun, Nov 15

5:00 am - 10:44 amSAT San Antonio-EYW Key West

4h 44m1 stop Miami

4:43 pm - 10:31 pmEYW Key West-SAT San Antonio

6h 48m1 stop Miami

$329American Airlines

Wed, Nov 18 - Mon, Nov 23

6:11 pm - 10:05 pmSAT San Antonio-MIA Miami

2h 54mnonstop

9:59 pm - 11:59 pmMIA Miami-SAT San Antonio

3h 00mnonstop

$374American Airlines

Sat, Sep 5 - Sun, Sep 6

Cheap last minute flights

Enter your travel dates to find the best prices.

7:49 pm - 5:17 amSAT San Antonio-MIA Miami

8h 28m1 stop Denver Intl

6:00 am - 7:31 pmMIA Miami-SAT San Antonio

14h 31m1 stop Denver Intl

$158Frontier

Sat, Aug 15 - Wed, Aug 19

7:49 pm - 5:51 amSAT San Antonio-MIA Miami

9h 02m1 stop Denver Intl

6:00 am - 6:54 pmMIA Miami-SAT San Antonio

13h 54m1 stop Denver Intl

$158Frontier

Thu, Aug 13 - Mon, Aug 17

5:40 am - 1:35 pmSAT San Antonio-MIA Miami

6h 55m1 stop Dallas Love Field

7:00 am - 12:00 pmMIA Miami-SAT San Antonio

6h 00m1 stop Orlando

$257Southwest

Sat, Aug 15 - Fri, Aug 21

6:10 am - 4:30 pmSAT San Antonio-MIA Miami

9h 20m2 stops Houston Hobby Austin Bergstrom

7:15 am - 1:40 pmMIA Miami-SAT San Antonio

7h 25m1 stop Chicago Midway

$262Southwest

Sat, Aug 15 - Fri, Aug 21

5:45 pm - 1:07 amSAT San Antonio-MIA Miami

6h 22m1 stop Atlanta Hartsfield-Jackson

3:59 pm - 9:04 pmMIA Miami-SAT San Antonio

6h 05m1 stop Atlanta Hartsfield-Jackson

$277Delta

Fri, Aug 14 - Sat, Aug 15

7:49 pm - 5:51 amSAT San Antonio-MIA Miami

9h 02m1 stop Denver Intl

8:10 am - 9:15 amMIA Miami-SAT San Antonio

26h 05m2 stops Atlanta Hartsfield-Jackson Raleigh-Durham

$302Multiple Airlines

Sun, Aug 16 - Sat, Aug 22

7:49 pm - 5:17 amSAT San Antonio-MIA Miami

8h 28m1 stop Denver Intl

3:30 pm - 10:50 amMIA Miami-SAT San Antonio

20h 20m2 stops Raleigh-Durham Memphis

$383Multiple Airlines

Sat, Aug 15 - Sun, Aug 23

6:11 pm - 10:05 pmSAT San Antonio-MIA Miami

2h 54mnonstop

9:59 pm - 11:59 pmMIA Miami-SAT San Antonio

3h 00mnonstop

$487American Airlines

Sat, Aug 15 - Sat, Aug 22

5:15 am - 9:15 amSAT San Antonio-MIA Miami

3h 00mnonstop

9:59 pm - 11:59 pmMIA Miami-SAT San Antonio

3h 00mnonstop

$487American Airlines

Sat, Aug 15 - Wed, Aug 19

7:35 am - 3:55 pmSAT San Antonio-MIA Miami

7h 20m1 stop Houston George Bush Intcntl

3:57 pm - 9:58 pmMIA Miami-SAT San Antonio

31h 01m2 stops Chicago O'Hare Intl San Francisco

$733United Airlines

Sat, Aug 15 - Sat, Aug 22

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Frontier flights from San Antonio to Florida Keys

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

Frontier

Sep 6

SAT8:26 pmSan Antonio

7h 26m

1 stop

MIA4:52 amMiami

Sep 11

MIA5:50 amMiami

14h 35m

1 stop

SAT7:25 pmSan Antonio

$143

Frontier

Aug 15

SAT7:49 pmSan Antonio

8h 28m

1 stop

MIA5:17 amMiami

Aug 19

MIA6:00 amMiami

14h 31m

1 stop

SAT7:31 pmSan Antonio

$158

Frontier

Aug 13

SAT7:49 pmSan Antonio

9h 02m

1 stop

MIA5:51 amMiami

Aug 14

MIA10:15 pmMiami

23h 22m

1 stop

SAT8:37 pmSan Antonio

$161

Southwest flights from San Antonio to Florida Keys

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

Southwest

Sep 30

SAT7:10 amSan Antonio

7h 05m

1 stop

MIA3:15 pmMiami

Oct 6

MIA8:25 amMiami

7h 15m

1 stop

SAT2:40 pmSan Antonio

$216

Southwest

Sep 8

SAT6:40 amSan Antonio

7h 50m

2 stops

MIA3:30 pmMiami

Sep 15

MIA4:00 pmMiami

8h 15m

1 stop

SAT11:15 pmSan Antonio

$221

Southwest

Aug 31

SAT5:35 amSan Antonio

8h 05m

2 stops

MIA2:40 pmMiami

Sep 1

MIA6:45 amMiami

7h 05m

2 stops

SAT12:50 pmSan Antonio

$226

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

San AntonioMiami

SAT San Antonio - MIA Miami

SATMIA

San Antonio

Sun 9/6

8:26 pm-4:52 am

1 stop7h 26m

Miami

Fri 9/11

5:50 am-7:25 pm

1 stop14h 35m

$143

San AntonioMiami

SAT San Antonio - MIA Miami

SATMIA

San Antonio

Tue 9/8

8:26 pm-4:52 am

1 stop7h 26m

Miami

Wed 9/16

5:50 am-7:25 pm

1 stop14h 35m

$158

San AntonioMiami

SAT San Antonio - MIA Miami

SATMIA

San Antonio

Wed 9/16

6:50 am-3:30 pm

1 stop7h 40m

Miami

Wed 9/16

6:05 pm-11:10 pm

1 stop6h 05m

$216

San AntonioMiami

SAT San Antonio - MIA Miami

SATMIA

San Antonio

Mon 10/19

10:45 am-6:30 pm

1 stop6h 45m

Miami

Mon 10/26

8:00 pm-12:40 am

1 stop5h 40m

$216

San AntonioMiami

SAT San Antonio - MIA Miami

SATMIA

San Antonio

Sat 11/7

11:08 am-5:48 am

1 stop17h 40m

Miami

Sun 11/15

9:00 am-11:58 am

2 stops27h 58m

$262

San AntonioMiami

SAT San Antonio - MIA Miami

SATMIA

San Antonio

Thu 9/17

6:10 pm-12:55 am

1 stop5h 45m

Miami

Mon 9/28

7:40 pm-12:08 am

1 stop5h 28m

$277

San AntonioMiami

SAT San Antonio - MIA Miami

SATMIA

San Antonio

Mon 11/2

1:20 pm-10:56 pm

1 stop8h 36m

Miami

Sat 11/7

6:00 am-12:35 pm

1 stop7h 35m

$277

San AntonioMiami

SAT San Antonio - MIA Miami

SATMIA

San Antonio

Sun 11/8

7:56 pm-5:48 am

1 stop8h 52m

Miami

Sun 11/15

9:00 am-11:58 am

2 stops27h 58m

$278

San AntonioKey West

SAT San Antonio - EYW Key West

SATEYW

San Antonio

Wed 11/18

5:00 am-10:44 am

1 stop4h 44m

Key West

Mon 11/23

4:43 pm-10:31 pm

1 stop6h 48m

$329

Quickest round-trip

San AntonioMiami

SAT San Antonio - MIA Miami

SATMIA

San Antonio

Sat 9/5

6:11 pm-10:05 pm

Nonstop2h 54m

Miami

Sun 9/6

9:59 pm-11:59 pm

Nonstop3h 00m

$374

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 January is another great option to travel to Florida Keys, with average flight prices from San Antonio averaging around $335.

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 Thursday when prices can be found for as low as $538. The most expensive day to fly to Florida Keys is Wednesday, with ticket prices averaging around $597.

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 $442. 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 $417 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 $318 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 49m
Direct flights	Mon, Wed, Thu, Fri, Sat and Sun
Airports in Florida Keys	3 airports

The fastest flight from San Antonio to Florida Keys takes 2h 49m

Direct flights go from San Antonio to Florida Keys on Monday, Wednesday, Thursday, Friday, Saturday and Sunday. There are no airlines offering direct flights.

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 August 2026, there are 6 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 15.33% of all bookings. The subsequent popular models are Airbus A320-100/200 at 14.56%, Boeing 737-800 Passenger/BBJ2 (winglets) at 10.32%, and Airbus A319 at 9.77%.

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 $237	Free Cancellation	Rating 7.1 11,911 reviews		Search American Airlines flights
Delta	PriceFrom $264	Free Cancellation	Rating 7.8 8,505 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.