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Cheap flights from San Antonio to Florida Keys from $78

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 9/17. 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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Find the cheapest flights from San Antonio to Florida Keys

Cheap round-trip flights

Southwest Logo
5:35 am - 4:00 pmSAT-MIA
9h 25m1 stop
Southwest Logo
6:05 am - 12:25 pmMIA-SAT
7h 20m1 stop
$156Southwest
Find Deal
Tue, Nov 11 - Sat, Nov 15
American Airlines Logo
5:20 am - 9:14 amSAT-MIA
2h 54mnonstop
American Airlines Logo
9:44 pm - 11:55 pmMIA-SAT
3h 11mnonstop
$159American Airlines
Find Deal
Tue, Sep 2 - Tue, Sep 9
Southwest Logo
4:05 pm - 10:10 pmSAT-MIA
5h 05m1 stop
Southwest Logo
5:50 am - 10:35 amMIA-SAT
5h 45m1 stop
$166Southwest
Find Deal
Mon, Sep 1 - Sat, Sep 6
Southwest Logo
4:05 pm - 10:10 pmSAT-MIA
5h 05m1 stop
Southwest Logo
6:55 am - 12:10 pmMIA-SAT
6h 15m2 stops
$172Southwest
Find Deal
Mon, Sep 1 - Sat, Sep 6
American Airlines Logo
5:20 am - 9:14 amSAT-MIA
2h 54mnonstop
American Airlines Logo
9:40 pm - 11:36 pmMIA-SAT
2h 56mnonstop
$174American Airlines
Find Deal
Sat, Aug 23 - Sat, Aug 30
Delta Logo
12:15 pm - 8:07 pmSAT-EYW
6h 52m1 stop
Delta Logo
7:40 am - 1:28 pmEYW-SAT
6h 48m1 stop
$197Delta
Find Deal
Wed, Oct 1 - Tue, Oct 7
Delta Logo
12:05 pm - 9:28 pmSAT-MIA
8h 23m1 stop
Delta Logo
6:00 am - 10:28 amMIA-SAT
5h 28m1 stop
$217Delta
Find Deal
Sat, Aug 23 - Sat, Aug 30
Frontier Logo
6:59 pm - 6:30 amSAT-MIA
10h 31m1 stop
Frontier Logo
6:15 am - 2:35 pmMIA-SAT
9h 20m1 stop
$245Frontier
Find Deal
Sat, Aug 16 - Sat, Aug 23
Frontier Logo
3:28 pm - 6:19 amSAT-MIA
13h 51m1 stop
Frontier Logo
6:00 am - 3:14 pmMIA-SAT
10h 14m1 stop
$248Frontier
Find Deal
Fri, Oct 24 - Sat, Nov 1
Spirit Airlines Logo
8:37 pm - 1:00 pmSAT-MIA
15h 23m2 stops
Spirit Airlines Logo
5:59 pm - 11:40 amMIA-SAT
18h 41m2 stops
$262Spirit Airlines
Find Deal
Mon, Sep 15 - Thu, Sep 18

Frontier flights from San Antonio to Florida Keys

Our best Frontier deals on San Antonio to Florida Keys flight tickets
Frontier
Aug 16
SAT6:59 pmSan Antonio
10h 31m
1 stop
MIA6:30 amMiami
Aug 23
MIA6:15 amMiami
9h 20m
1 stop
SAT2:35 pmSan Antonio
$245
Find similar
Frontier
Oct 24
SAT3:28 pmSan Antonio
13h 51m
1 stop
MIA6:19 amMiami
Nov 1
MIA6:00 amMiami
10h 14m
1 stop
SAT3:14 pmSan Antonio
$248
Find similar
Frontier
Oct 11
SAT4:12 pmSan Antonio
13h 07m
1 stop
MIA6:19 amMiami
Oct 12
MIA6:35 pmMiami
20h 58m
1 stop
SAT2:33 pmSan Antonio
$255
Find similar

Southwest flights from San Antonio to Florida Keys

Our best Southwest deals on San Antonio to Florida Keys flight tickets
Southwest
Nov 11
SAT5:35 amSan Antonio
9h 25m
1 stop
MIA4:00 pmMiami
Nov 15
MIA6:05 amMiami
7h 20m
1 stop
SAT12:25 pmSan Antonio
$156
Find similar
Southwest
Sep 1
SAT4:05 pmSan Antonio
5h 05m
1 stop
MIA10:10 pmMiami
Sep 6
MIA5:50 amMiami
5h 45m
1 stop
SAT10:35 amSan Antonio
$166
Find similar
Southwest
Sep 1
SAT4:05 pmSan Antonio
5h 05m
1 stop
MIA10:10 pmMiami
Sep 6
MIA6:55 amMiami
6h 15m
2 stops
SAT12:10 pmSan Antonio
$172
Find similar

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 July 31, 2025.
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

Tue 11/11

5:35 am-4:00 pm

1 stop9h 25m

Miami

Sat 11/15

6:05 am-12:25 pm

1 stop7h 20m

$156

San AntonioMiami

SAT - MIA

SATMIA

San Antonio

Tue 9/2

5:20 am-9:14 am

Nonstop2h 54m

Miami

Tue 9/9

9:44 pm-11:55 pm

Nonstop3h 11m

$159

San AntonioMiami

SAT - MIA

SATMIA

San Antonio

Mon 9/1

4:05 pm-10:10 pm

1 stop5h 05m

Miami

Sat 9/6

5:50 am-10:35 am

1 stop5h 45m

$166

San AntonioMiami

SAT - MIA

SATMIA

San Antonio

Mon 9/1

4:05 pm-10:10 pm

1 stop5h 05m

Miami

Sat 9/6

6:55 am-12:10 pm

2 stops6h 15m

$172

San AntonioMiami

SAT - MIA

SATMIA

San Antonio

Sat 8/23

5:20 am-9:14 am

Nonstop2h 54m

Miami

Sat 8/30

9:40 pm-11:36 pm

Nonstop2h 56m

$174

San AntonioKey West

SAT - EYW

SATEYW

San Antonio

Wed 10/1

12:15 pm-8:07 pm

1 stop6h 52m

Key West

Tue 10/7

7:40 am-1:28 pm

1 stop6h 48m

$197

San AntonioMiami

SAT - MIA

SATMIA

San Antonio

Sat 8/23

12:05 pm-9:28 pm

1 stop8h 23m

Miami

Sat 8/30

6:00 am-10:28 am

1 stop5h 28m

$217

San AntonioMiami

SAT - MIA

SATMIA

San Antonio

Sat 8/16

6:59 pm-6:30 am

1 stop10h 31m

Miami

Sat 8/23

6:15 am-2:35 pm

1 stop9h 20m

$245

San AntonioMiami

SAT - MIA

SATMIA

San Antonio

Fri 10/24

3:28 pm-6:19 am

1 stop13h 51m

Miami

Sat 11/1

6:00 am-3:14 pm

1 stop10h 14m

$248

San AntonioMiami

SAT - MIA

SATMIA

San Antonio

Mon 9/15

8:37 pm-1:00 pm

2 stops15h 23m

Miami

Thu 9/18

5:59 pm-11:40 am

2 stops18h 41m

$262

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 August is another great option to travel to Florida Keys, with average flight prices from San Antonio averaging around $338.

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 Wednesday when prices can be found for as low as $541. The most expensive day to fly to Florida Keys is Saturday, with ticket prices averaging around $552.

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 evening. momondo users have found flights departing from San Antonio to Florida Keys in the evening for as low as $256. 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 morning are often more expensive with an average ticket price of $556.

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 $375 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 $262 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

Best Price Found

$78

Fastest flight time

2h 45m

Direct flights

Every day

Airports in Florida Keys

2 airports
The best one-way flight to Florida Keys from San Antonio in the past 72 hours is $78. The best round-trip flight deal from San Antonio to Florida Keys found on momondo in the last 72 hours is $156.
The fastest flight from San Antonio to Florida Keys takes 2h 45m
Direct flights go from San Antonio to Florida Keys every day.
There are 2 airports near Florida Keys: Key West (EYW), 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 $208Free CancellationRating
8.0
7,981 reviews
Search Delta flights
American AirlinesPriceFrom $224Free CancellationRating
7.2
10,000 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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