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Cheap flights from San Antonio to Florida Keys from $64

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from San Antonio to Florida Keys departing on 2/25. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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0 bags

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Find the cheapest flights from San Antonio to Florida Keys

Cheap round-trip flights

Enter your travel dates to find the best prices.
Spirit Airlines Logo
6:00 am - 11:39 pm
SAT
-
MIA
16h 39m
2 stops
Spirit Airlines Logo
7:05 am - 8:30 am
MIA
-
SAT
26h 25m
2 stops
$220Spirit Airlines
Wed, Mar 4 - Sat, Mar 7
Frontier Logo
6:12 pm - 5:14 am
SAT
-
MIA
10h 02m
1 stop
Frontier Logo
5:05 am - 4:20 pm
MIA
-
SAT
12h 15m
1 stop
$222Frontier
Wed, Feb 25 - Mon, Mar 2
Frontier Logo
5:04 pm - 12:42 am
SAT
-
MIA
6h 38m
1 stop
Frontier Logo
6:45 am - 7:30 pm
MIA
-
SAT
13h 45m
1 stop
$224Frontier
Fri, Feb 27 - Thu, Mar 5
American Airlines Logo
5:00 am - 1:15 pm
SAT
-
EYW
7h 15m
1 stop
American Airlines Logo
7:36 pm - 11:59 pm
EYW
-
SAT
5h 23m
1 stop
$225American Airlines
Mon, Mar 2 - Sat, Mar 7
Frontier Logo
3:36 pm - 10:34 am
SAT
-
MIA
17h 58m
1 stop
Frontier Logo
7:59 pm - 12:17 am
MIA
-
SAT
29h 18m
1 stop
$225Frontier
Mon, Mar 9 - Mon, Mar 16
Multiple Airlines Logo
3:36 pm - 10:34 am
SAT
-
MIA
17h 58m
1 stop
Multiple Airlines Logo
7:55 am - 9:27 am
MIA
-
SAT
26h 32m
2 stops
$229Multiple Airlines
Mon, Mar 9 - Mon, Mar 16
American Airlines Logo
6:00 am - 4:49 pm
SAT
-
EYW
9h 49m
2 stops
American Airlines Logo
7:36 pm - 11:59 pm
EYW
-
SAT
5h 23m
1 stop
$230American Airlines
Mon, Mar 2 - Sat, Mar 7
Multiple Airlines Logo
7:56 pm - 5:14 am
SAT
-
MIA
8h 18m
1 stop
Multiple Airlines Logo
12:25 pm - 9:30 am
MIA
-
SAT
22h 05m
2 stops
$230Multiple Airlines
Sat, Feb 21 - Tue, Feb 24
Spirit Airlines Logo
10:26 am - 12:16 pm
SAT
-
MIA
24h 50m
2 stops
Spirit Airlines Logo
7:05 am - 9:30 am
MIA
-
SAT
27h 25m
2 stops
$231Spirit Airlines
Mon, Mar 2 - Fri, Mar 6
Delta Logo
12:24 pm - 7:41 pm
SAT
-
EYW
6h 17m
1 stop
Delta Logo
6:19 pm - 12:30 am
EYW
-
SAT
7h 11m
1 stop
$259Delta
Wed, Apr 8 - Tue, Apr 14

Spirit Airlines flights from San Antonio to Florida Keys

Our best Spirit Airlines deals on San Antonio to Florida Keys flight tickets
Spirit Airlines
Mar 4
SAT6:00 amSan Antonio
16h 39m
2 stops
MIA11:39 pmMiami
Mar 7
MIA7:05 amMiami
26h 25m
2 stops
SAT8:30 amSan Antonio
$220
Spirit Airlines
Mar 2
SAT10:26 amSan Antonio
24h 50m
2 stops
MIA12:16 pmMiami
Mar 6
MIA7:05 amMiami
27h 25m
2 stops
SAT9:30 amSan Antonio
$231
Spirit Airlines
Feb 28
SAT10:26 amSan Antonio
24h 50m
2 stops
MIA12:16 pmMiami
Mar 7
MIA7:05 amMiami
26h 25m
2 stops
SAT8:30 amSan Antonio
$232

American Airlines flights from San Antonio to Florida Keys

Our best American Airlines deals on San Antonio to Florida Keys flight tickets
American Airlines
Mar 2
SAT5:00 amSan Antonio
7h 15m
1 stop
EYW1:15 pmKey West
Mar 7
EYW7:36 pmKey West
5h 23m
1 stop
SAT11:59 pmSan Antonio
$225
American Airlines
Mar 2
SAT6:00 amSan Antonio
9h 49m
2 stops
EYW4:49 pmKey West
Mar 7
EYW7:36 pmKey West
5h 23m
1 stop
SAT11:59 pmSan Antonio
$230
American Airlines
Feb 26
SAT5:00 amSan Antonio
2h 51m
MIA8:51 amMiami
Mar 4
MIA9:34 pmMiami
3h 25m
SAT11:59 pmSan Antonio
$239

momondo Fare Finder

 
Customize your flight search to find flights from San Antonio to Florida Keys that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 832,500 searches. Data last updated February 3, 2026.
Use the filters below to find and compare flights from San Antonio to Florida Keys that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

San AntonioMiami

SAT - MIA

SATMIA

San Antonio

Wed 3/4

6:00 am-11:39 pm

2 stops16h 39m

Miami

Sat 3/7

7:05 am-8:30 am

2 stops26h 25m

$220

San AntonioMiami

SAT - MIA

SATMIA

San Antonio

Wed 2/25

6:12 pm-5:14 am

1 stop10h 02m

Miami

Mon 3/2

5:05 am-4:20 pm

1 stop12h 15m

$222

San AntonioMiami

SAT - MIA

SATMIA

San Antonio

Fri 2/27

5:04 pm-12:42 am

1 stop6h 38m

Miami

Thu 3/5

6:45 am-7:30 pm

1 stop13h 45m

$224

San AntonioKey West

SAT - EYW

SATEYW

San Antonio

Mon 3/2

5:00 am-1:15 pm

1 stop7h 15m

Key West

Sat 3/7

7:36 pm-11:59 pm

1 stop5h 23m

$225

San AntonioMiami

SAT - MIA

SATMIA

San Antonio

Mon 3/9

3:36 pm-10:34 am

1 stop17h 58m

Miami

Mon 3/16

7:59 pm-12:17 am

1 stop29h 18m

$225

San AntonioMiami

SAT - MIA

SATMIA

San Antonio

Mon 3/9

3:36 pm-10:34 am

1 stop17h 58m

Miami

Mon 3/16

7:55 am-9:27 am

2 stops26h 32m

$229

San AntonioKey West

SAT - EYW

SATEYW

San Antonio

Mon 3/2

6:00 am-4:49 pm

2 stops9h 49m

Key West

Sat 3/7

7:36 pm-11:59 pm

1 stop5h 23m

$230

San AntonioMiami

SAT - MIA

SATMIA

San Antonio

Sat 2/21

7:56 pm-5:14 am

1 stop8h 18m

Miami

Tue 2/24

12:25 pm-9:30 am

2 stops22h 05m

$230

San AntonioMiami

SAT - MIA

SATMIA

San Antonio

Mon 3/2

10:26 am-12:16 pm

2 stops24h 50m

Miami

Fri 3/6

7:05 am-9:30 am

2 stops27h 25m

$231

San AntonioKey West

SAT - EYW

SATEYW

San Antonio

Wed 4/8

12:24 pm-7:41 pm

1 stop6h 17m

Key West

Tue 4/14

6:19 pm-12:30 am

1 stop7h 11m

$259

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Florida Keys from

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

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 $360.

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 $501. 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 $474. 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 $892.

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 $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 $296 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?

  • 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?

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
DeltaPriceFrom $227Free CancellationRating
7.9
8,138 reviews
Search Delta flights
American AirlinesPriceFrom $236Free CancellationRating
7.2
11,216 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.

An easier way to manage your Florida Keys trip

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Find better results for your trip to Florida Keys

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