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

Southwest, Spirit Airlines, 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 March 2026, there are 15 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 March 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.

$80 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.

4:04 pm - 5:05 am

SAT

MIA

12h 01m

1 stop

7:00 am - 3:53 pm

MIA

SAT

9h 53m

1 stop

$180Frontier

Tue, Apr 14 - Wed, Apr 22

6:31 pm - 7:22 am

SAT

MIA

11h 51m

1 stop

7:00 am - 2:15 pm

MIA

SAT

8h 15m

1 stop

$182Frontier

Mon, Apr 20 - Mon, Apr 27

7:45 am - 5:49 am

SAT

MIA

21h 04m

1 stop

5:50 am - 12:19 am

MIA

SAT

19h 29m

1 stop

$191Frontier

Tue, Apr 7 - Fri, Apr 10

12:08 pm - 7:49 pm

SAT

EYW

6h 41m

1 stop

6:19 pm - 12:44 am

EYW

SAT

7h 25m

1 stop

$265Delta

Tue, May 12 - Tue, May 19

10:22 am - 11:30 am

SAT

EYW

24h 08m

1 stop

11:01 am - 11:51 pm

EYW

SAT

13h 50m

2 stops

$319Multiple Airlines

Mon, Apr 13 - Thu, Apr 16

10:22 am - 11:30 am

SAT

EYW

24h 08m

1 stop

9:46 am - 9:24 am

EYW

SAT

24h 38m

1 stop

$329Multiple Airlines

Mon, Apr 13 - Thu, Apr 16

10:00 am - 6:49 pm

SAT

EYW

7h 49m

1 stop

7:40 pm - 12:02 am

EYW

SAT

5h 22m

1 stop

$330American Airlines

Wed, May 27 - Tue, Jun 2

6:00 am - 3:24 pm

SAT

EYW

8h 24m

1 stop

6:45 am - 2:21 pm

EYW

SAT

8h 36m

2 stops

$335American Airlines

Tue, May 12 - Tue, May 19

12:15 pm - 7:45 pm

SAT

EYW

6h 30m

1 stop

7:00 am - 1:07 pm

EYW

SAT

7h 07m

1 stop

$385Delta

Wed, Sep 2 - Tue, Sep 8

1:22 pm - 11:30 am

SAT

EYW

21h 08m

3 stops

12:26 pm - 11:51 pm

EYW

SAT

12h 25m

1 stop

$398Spirit Airlines

Mon, Apr 13 - Thu, Apr 16

Frontier flights from San Antonio to Florida Keys

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

Frontier

Apr 14

SAT4:04 pmSan Antonio

12h 01m

1 stop

MIA5:05 amMiami

Apr 22

MIA7:00 amMiami

9h 53m

1 stop

SAT3:53 pmSan Antonio

$180

Frontier

Apr 20

SAT6:31 pmSan Antonio

11h 51m

1 stop

MIA7:22 amMiami

Apr 27

MIA7:00 amMiami

8h 15m

1 stop

SAT2:15 pmSan Antonio

$182

Frontier

Apr 7

SAT7:45 amSan Antonio

21h 04m

1 stop

MIA5:49 amMiami

Apr 10

MIA5:50 amMiami

19h 29m

1 stop

SAT12:19 amSan Antonio

$191

Southwest flights from San Antonio to Florida Keys

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

Southwest

Apr 22

SAT12:45 pmSan Antonio

4h 35m

1 stop

MIA6:20 pmMiami

Apr 28

MIA12:35 pmMiami

10h 05m

1 stop

SAT9:40 pmSan Antonio

$237

Southwest

Apr 21

SAT9:40 amSan Antonio

7h 40m

2 stops

MIA6:20 pmMiami

Apr 28

MIA7:00 amMiami

9h 10m

2 stops

SAT3:10 pmSan Antonio

$247

Southwest

Apr 21

SAT1:40 pmSan Antonio

7h 15m

2 stops

MIA9:55 pmMiami

Apr 28

MIA6:15 amMiami

6h 45m

1 stop

SAT12:00 pmSan Antonio

$261

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

San AntonioMiami

SAT - MIA

SATMIA

San Antonio

Tue 4/14

4:04 pm-5:05 am

1 stop12h 01m

Miami

Wed 4/22

7:00 am-3:53 pm

1 stop9h 53m

$180

San AntonioMiami

SAT - MIA

SATMIA

San Antonio

Mon 4/20

6:31 pm-7:22 am

1 stop11h 51m

Miami

Mon 4/27

7:00 am-2:15 pm

1 stop8h 15m

$182

San AntonioMiami

SAT - MIA

SATMIA

San Antonio

Tue 4/7

7:45 am-5:49 am

1 stop21h 04m

Miami

Fri 4/10

5:50 am-12:19 am

1 stop19h 29m

$191

San AntonioKey West

SAT - EYW

SATEYW

San Antonio

Tue 5/12

12:08 pm-7:49 pm

1 stop6h 41m

Key West

Tue 5/19

6:19 pm-12:44 am

1 stop7h 25m

$265

San AntonioKey West

SAT - EYW

SATEYW

San Antonio

Mon 4/13

10:22 am-11:30 am

1 stop24h 08m

Key West

Thu 4/16

11:01 am-11:51 pm

2 stops13h 50m

$319

San AntonioKey West

SAT - EYW

SATEYW

San Antonio

Mon 4/13

10:22 am-11:30 am

1 stop24h 08m

Key West

Thu 4/16

9:46 am-9:24 am

1 stop24h 38m

$329

Quickest round-trip

San AntonioKey West

SAT - EYW

SATEYW

San Antonio

Wed 5/27

10:00 am-6:49 pm

1 stop7h 49m

Key West

Tue 6/2

7:40 pm-12:02 am

1 stop5h 22m

$330

San AntonioKey West

SAT - EYW

SATEYW

San Antonio

Tue 5/12

6:00 am-3:24 pm

1 stop8h 24m

Key West

Tue 5/19

6:45 am-2:21 pm

2 stops8h 36m

$335

San AntonioKey West

SAT - EYW

SATEYW

San Antonio

Wed 9/2

12:15 pm-7:45 pm

1 stop6h 30m

Key West

Tue 9/8

7:00 am-1:07 pm

1 stop7h 07m

$385

San AntonioKey West

SAT - EYW

SATEYW

San Antonio

Mon 4/13

1:22 pm-11:30 am

3 stops21h 08m

Key West

Thu 4/16

12:26 pm-11:51 pm

1 stop12h 25m

$398

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 September is another great option to travel to Florida Keys, with average flight prices from San Antonio averaging around $355.

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 $493. The most expensive day to fly to Florida Keys is Wednesday, with ticket prices averaging around $577.

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 $444. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. Flights at noon are often more expensive with an average ticket price of $885.

How far in advance should I book a flight 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 $389 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 $308 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	Every day
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 every day.

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

Search flight deals

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 March 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 22.26% of all bookings. The subsequent popular models are Airbus A320-100/200 at 18.16%, Boeing 737-800 Passenger/BBJ2 (winglets) at 10.47%, and Airbus A321-100/200 at 8.37%.

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 7.9 8,320 reviews		Search Delta flights
American Airlines	PriceFrom $236	Free Cancellation	Rating 7.1 11,492 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.