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

American Airlines, United Airlines, and Delta 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 June 2026, there are 20 flights per week flying from San Antonio to Florida Keys. The most common day of the week flights depart is Mon, with 20% 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 June 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.

$100 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.

7:39 pm - 5:51 am

SAT

MIA

9h 12m

1 stop

6:00 am - 6:44 pm

MIA

SAT

13h 44m

1 stop

$250Frontier

Wed, Jul 29 - Sun, Aug 2

7:39 pm - 5:17 am

SAT

MIA

8h 38m

1 stop

6:00 am - 6:44 pm

MIA

SAT

13h 44m

1 stop

$252Frontier

Sat, Jul 11 - Sat, Jul 25

7:49 pm - 5:51 am

SAT

MIA

9h 02m

1 stop

6:00 am - 6:54 pm

MIA

SAT

13h 54m

1 stop

$255Frontier

Mon, Aug 17 - Fri, Aug 28

7:39 pm - 5:17 am

SAT

MIA

8h 38m

1 stop

6:00 am - 6:44 pm

MIA

SAT

13h 44m

1 stop

$257Frontier

Sat, Jul 18 - Mon, Jul 27

7:39 pm - 5:51 am

SAT

MIA

9h 12m

1 stop

6:00 am - 6:44 pm

MIA

SAT

13h 44m

1 stop

$258Frontier

Wed, Jul 8 - Sat, Jul 25

8:00 am - 5:11 pm

SAT

EYW

8h 11m

1 stop

7:00 am - 1:22 pm

EYW

SAT

7h 22m

1 stop

$319Delta

Fri, Oct 30 - Sun, Nov 1

10:46 am - 5:20 pm

SAT

EYW

5h 34m

1 stop

11:48 am - 6:46 pm

EYW

SAT

7h 58m

1 stop

$323Delta

Wed, Aug 19 - Tue, Aug 25

5:01 am - 1:14 pm

SAT

EYW

7h 13m

1 stop

7:55 pm - 11:59 pm

EYW

SAT

5h 04m

1 stop

$377American Airlines

Wed, Jul 8 - Sat, Jul 11

4:53 pm - 10:24 am

SAT

EYW

16h 31m

2 stops

3:27 pm - 3:41 pm

EYW

SAT

25h 14m

1 stop

$404Multiple Airlines

Sat, Jul 4 - Fri, Jul 10

9:55 am - 6:48 pm

SAT

EYW

7h 53m

1 stop

7:40 pm - 11:59 pm

EYW

SAT

5h 19m

1 stop

$417American Airlines

Thu, Jul 9 - Wed, Jul 15

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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

Jul 16

SAT7:39 pmSan Antonio

9h 12m

1 stop

MIA5:51 amMiami

Jul 21

MIA6:00 amMiami

13h 44m

1 stop

SAT6:44 pmSan Antonio

$249

Frontier

Jul 29

SAT7:39 pmSan Antonio

9h 12m

1 stop

MIA5:51 amMiami

Aug 2

MIA10:15 pmMiami

23h 22m

1 stop

SAT8:37 pmSan Antonio

$250

Frontier

Jul 11

SAT7:39 pmSan Antonio

8h 38m

1 stop

MIA5:17 amMiami

Jul 25

MIA6:00 amMiami

13h 44m

1 stop

SAT6:44 pmSan Antonio

$252

American Airlines flights from San Antonio to Florida Keys

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

American Airlines

Jul 14

SAT5:01 amSan Antonio

2h 59m

MIA9:00 amMiami

Jul 22

MIA9:52 pmMiami

3h 07m

SAT11:59 pmSan Antonio

$313

American Airlines

Jul 8

SAT5:01 amSan Antonio

7h 13m

1 stop

EYW1:14 pmKey West

Jul 11

EYW7:55 pmKey West

5h 04m

1 stop

SAT11:59 pmSan Antonio

$377

American Airlines

Jul 7

SAT5:01 amSan Antonio

2h 59m

MIA9:00 amMiami

Jul 15

MIA5:25 amMiami

5h 43m

1 stop

SAT10:08 amSan Antonio

$414

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

San AntonioMiami

SAT - MIA

SATMIA

San Antonio

Wed 7/29

7:39 pm-5:51 am

1 stop9h 12m

Miami

Sun 8/2

6:00 am-6:44 pm

1 stop13h 44m

$250

San AntonioMiami

SAT - MIA

SATMIA

San Antonio

Sat 7/11

7:39 pm-5:17 am

1 stop8h 38m

Miami

Sat 7/25

6:00 am-6:44 pm

1 stop13h 44m

$252

San AntonioMiami

SAT - MIA

SATMIA

San Antonio

Mon 8/17

7:49 pm-5:51 am

1 stop9h 02m

Miami

Fri 8/28

6:00 am-6:54 pm

1 stop13h 54m

$255

San AntonioMiami

SAT - MIA

SATMIA

San Antonio

Sat 7/18

7:39 pm-5:17 am

1 stop8h 38m

Miami

Mon 7/27

6:00 am-6:44 pm

1 stop13h 44m

$257

San AntonioMiami

SAT - MIA

SATMIA

San Antonio

Wed 7/8

7:39 pm-5:51 am

1 stop9h 12m

Miami

Sat 7/25

6:00 am-6:44 pm

1 stop13h 44m

$258

San AntonioKey West

SAT - EYW

SATEYW

San Antonio

Fri 10/30

8:00 am-5:11 pm

1 stop8h 11m

Key West

Sun 11/1

7:00 am-1:22 pm

1 stop7h 22m

$319

San AntonioKey West

SAT - EYW

SATEYW

San Antonio

Wed 8/19

10:46 am-5:20 pm

1 stop5h 34m

Key West

Tue 8/25

11:48 am-6:46 pm

1 stop7h 58m

$323

Quickest round-trip

San AntonioKey West

SAT - EYW

SATEYW

San Antonio

Wed 7/8

5:01 am-1:14 pm

1 stop7h 13m

Key West

Sat 7/11

7:55 pm-11:59 pm

1 stop5h 04m

$377

San AntonioKey West

SAT - EYW

SATEYW

San Antonio

Sat 7/4

4:53 pm-10:24 am

2 stops16h 31m

Key West

Fri 7/10

3:27 pm-3:41 pm

1 stop25h 14m

$404

San AntonioKey West

SAT - EYW

SATEYW

San Antonio

Thu 7/9

9:55 am-6:48 pm

1 stop7h 53m

Key West

Wed 7/15

7:40 pm-11:59 pm

1 stop5h 19m

$417

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 Thursday when prices can be found for as low as $538. The most expensive day to fly to Florida Keys is Sunday, with ticket prices averaging around $589.

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 $441. 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 $401 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 $317 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 June 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 Airbus A320-100/200, representing 15.75% of all bookings. The subsequent popular models are Boeing 737 MAX 8 at 14.84%, Boeing 737-800 Passenger/BBJ2 (winglets) at 10.46%, and Airbus A319 at 9.55%.

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
Delta	PriceFrom $227	Free Cancellation	Rating 7.8 8,424 reviews		Search Delta flights
American Airlines	PriceFrom $230	Free Cancellation	Rating 7.1 11,745 reviews		Search American Airlines 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.