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Cheap flights from San Antonio to Key West from $146

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 Key West departing on 4/15. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

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Find the cheapest flights from San Antonio to Key West

Cheap round-trip flights

Enter your travel dates to find the best prices.
United Airlines Logo
6:49 am - 2:51 pm
SAT
-
EYW
7h 02m
1 stop
United Airlines Logo
3:52 pm - 10:58 pm
EYW
-
SAT
8h 06m
1 stop
$275United Airlines
Tue, Apr 21 - Wed, Apr 29
American Airlines Logo
7:00 am - 4:30 pm
SAT
-
EYW
8h 30m
2 stops
American Airlines Logo
12:04 pm - 8:05 pm
EYW
-
SAT
9h 01m
1 stop
$280American Airlines
Tue, Apr 21 - Wed, Apr 29
American Airlines Logo
6:00 am - 4:30 pm
SAT
-
EYW
9h 30m
2 stops
American Airlines Logo
7:49 pm - 11:59 pm
EYW
-
SAT
5h 10m
1 stop
$282American Airlines
Tue, May 19 - Sat, May 23
Delta Logo
5:25 am - 12:12 pm
SAT
-
EYW
5h 47m
1 stop
Delta Logo
7:45 am - 1:21 pm
EYW
-
SAT
6h 36m
1 stop
$300Delta
Sat, Jun 6 - Tue, Jun 9
American Airlines Logo
10:00 am - 6:49 pm
SAT
-
EYW
7h 49m
1 stop
American Airlines Logo
7:40 pm - 11:59 pm
EYW
-
SAT
5h 19m
1 stop
$330American Airlines
Wed, May 27 - Tue, Jun 2
American Airlines Logo
8:00 am - 7:10 pm
SAT
-
EYW
10h 10m
2 stops
American Airlines Logo
7:40 pm - 11:59 pm
EYW
-
SAT
5h 19m
1 stop
$335American Airlines
Wed, May 27 - Tue, Jun 2
Delta Logo
6:45 am - 1:38 pm
SAT
-
EYW
5h 53m
1 stop
Delta Logo
11:56 am - 5:29 pm
EYW
-
SAT
6h 33m
1 stop
$337Delta
Tue, Jun 30 - Tue, Jul 7
Spirit Airlines Logo
6:00 am - 1:35 pm
SAT
-
EYW
6h 35m
1 stop
Spirit Airlines Logo
2:30 pm - 11:51 pm
EYW
-
SAT
10h 21m
1 stop
$339Spirit Airlines
Fri, Apr 17 - Fri, Apr 24
Multiple Airlines Logo
1:22 pm - 12:26 pm
SAT
-
EYW
22h 04m
1 stop
Multiple Airlines Logo
4:22 pm - 9:27 am
EYW
-
SAT
18h 05m
2 stops
$340Multiple Airlines
Thu, Apr 9 - Sun, Apr 12
Multiple Airlines Logo
10:23 am - 11:44 am
SAT
-
EYW
48h 21m
2 stops
Multiple Airlines Logo
1:06 pm - 1:17 pm
EYW
-
SAT
25h 11m
1 stop
$341Multiple Airlines
Fri, Apr 17 - Fri, Apr 24

Spirit Airlines flights from San Antonio to Key West

Our best Spirit Airlines deals on San Antonio to Key West flight tickets
Spirit Airlines
Apr 17
SAT6:00 amSan Antonio
6h 35m
1 stop
EYW1:35 pmKey West
Apr 24
EYW2:30 pmKey West
10h 21m
1 stop
SAT11:51 pmSan Antonio
$339
Spirit Airlines
Apr 17
SAT6:00 amSan Antonio
6h 35m
1 stop
EYW1:35 pmKey West
Apr 24
EYW2:30 pmKey West
23h 47m
3 stops
SAT1:17 pmSan Antonio
$446
Spirit Airlines
Apr 12
SAT1:22 pmSan Antonio
23h 15m
3 stops
EYW1:37 pmKey West
Apr 16
EYW12:26 pmKey West
12h 25m
1 stop
SAT11:51 pmSan Antonio
$486

American Airlines flights from San Antonio to Key West

Our best American Airlines deals on San Antonio to Key West flight tickets
American Airlines
Apr 21
SAT7:00 amSan Antonio
8h 30m
2 stops
EYW4:30 pmKey West
Apr 29
EYW12:04 pmKey West
9h 01m
1 stop
SAT8:05 pmSan Antonio
$280
American Airlines
May 19
SAT6:00 amSan Antonio
9h 30m
2 stops
EYW4:30 pmKey West
May 23
EYW7:49 pmKey West
5h 10m
1 stop
SAT11:59 pmSan Antonio
$282
American Airlines
May 27
SAT10:00 amSan Antonio
7h 49m
1 stop
EYW6:49 pmKey West
Jun 2
EYW7:40 pmKey West
5h 19m
1 stop
SAT11:59 pmSan Antonio
$330

momondo Fare Finder

 
Customize your flight search to find flights from San Antonio to Key West 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 March 28, 2026.
Use the filters below to find and compare flights from San Antonio to Key West that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

San AntonioKey West

SAT - EYW

SATEYW

San Antonio

Tue 4/21

6:49 am-2:51 pm

1 stop7h 02m

Key West

Wed 4/29

3:52 pm-10:58 pm

1 stop8h 06m

$275

San AntonioKey West

SAT - EYW

SATEYW

San Antonio

Tue 4/21

7:00 am-4:30 pm

2 stops8h 30m

Key West

Wed 4/29

12:04 pm-8:05 pm

1 stop9h 01m

$280

San AntonioKey West

SAT - EYW

SATEYW

San Antonio

Tue 5/19

6:00 am-4:30 pm

2 stops9h 30m

Key West

Sat 5/23

7:49 pm-11:59 pm

1 stop5h 10m

$282
Quickest round-trip

San AntonioKey West

SAT - EYW

SATEYW

San Antonio

Sat 6/6

5:25 am-12:12 pm

1 stop5h 47m

Key West

Tue 6/9

7:45 am-1:21 pm

1 stop6h 36m

$300

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-11:59 pm

1 stop5h 19m

$330

San AntonioKey West

SAT - EYW

SATEYW

San Antonio

Wed 5/27

8:00 am-7:10 pm

2 stops10h 10m

Key West

Tue 6/2

7:40 pm-11:59 pm

1 stop5h 19m

$335

San AntonioKey West

SAT - EYW

SATEYW

San Antonio

Tue 6/30

6:45 am-1:38 pm

1 stop5h 53m

Key West

Tue 7/7

11:56 am-5:29 pm

1 stop6h 33m

$337

San AntonioKey West

SAT - EYW

SATEYW

San Antonio

Fri 4/17

6:00 am-1:35 pm

1 stop6h 35m

Key West

Fri 4/24

2:30 pm-11:51 pm

1 stop10h 21m

$339

San AntonioKey West

SAT - EYW

SATEYW

San Antonio

Thu 4/9

1:22 pm-12:26 pm

1 stop22h 04m

Key West

Sun 4/12

4:22 pm-9:27 am

2 stops18h 05m

$340

San AntonioKey West

SAT - EYW

SATEYW

San Antonio

Fri 4/17

10:23 am-11:44 am

2 stops48h 21m

Key West

Fri 4/24

1:06 pm-1:17 pm

1 stop25h 11m

$341

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 19 resultsSorted by cheapest first
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See travel insights to Key West from

How to get the cheapest flight ticket from San Antonio to Key West

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 typical price of a round-trip flight between San Antonio and Key West?

What is the cheapest month to fly to Key West?

In general, August is the cheapest month to fly from San Antonio to Key West. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $258. If you are unable to visit Key West during the month of August, then departing from San Antonio during the month January is also very affordable. Most momondo users find prices during this month for around $284.

When to book flights from San Antonio to Key West

Are you open to changing your travel dates? Check out the ideal times to fly from San Antonio to Key West according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap San Antonio to Key West (SAT to EYW) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from San Antonio to Key West

Fastest flight time

5h 31m

Direct flights

None
The fastest flight from San Antonio to Key West takes 5h 31m
There are no direct flights from San Antonio to Key West. There are no popular flight routes from San Antonio to Key West.
Search flight deals

  • How far is San Antonio to Key West by plane?

    There are 1079.4 mi between San Antonio and Key West. Typically, this will take 5h 31m by plane in normal conditions.

  • When did momondo last update prices for flights from San Antonio Airport to Key West Airport?

    Prices for flights from San Antonio Airport to Key West Airport are updated daily.

  • How many operators does momondo search for flights from San Antonio Airport to Key West Airport?

  • How old do you have to be to fly from San Antonio Airport to Key West Airport?

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from San Antonio Airport to Key West Airport.

  • What documentation or ID do you need to fly to Key West Airport?

    The travel and health documents you'll need for your trip to Key West Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Key West Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

  • What is the most popular airline from San Antonio to Key West?

Best airlines flying from San Antonio to Key West

Compare and see reviews for airlines that fly from San Antonio to Key West with momondo
Airline
Rating
Free Cancellation
Price
DeltaPriceFrom $227Free CancellationRating
7.9
8,359 reviews
Search Delta flights
American AirlinesPriceFrom $230Free CancellationRating
7.1
11,521 reviews
Search American Airlines flights

Traveling to a place near Key West?

Book flights to Key West if you plan to visit one of these locations
Big Pine Key
Little Torch Key

Why use momondo?

Why should I use momondo to find a flight deal from San Antonio to Key West?

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from San Antonio to Key West for you.

Can I find flights from San Antonio to Key West with flexible booking policies on momondo?

Yes. momondo enables you to select and highlight flights to Key West from San Antonio with this policy.

How can momondo help me find flights from San Antonio to Key West?

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 Key West.

I’m not ready to book a flight from San Antonio to Key West right now. Can momondo alert me if prices change?

Of course. momondo tracks the price of San Antonio to Key West flights. All you need is a valid email address and we will do the rest; it is that quick and easy.

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