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Cheap flights from Key West to Puerto Rico 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 Key West to Puerto Rico departing on 8/28. 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
1 adult, Economy, 0 bags

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Key West to Puerto Rico

Cheap round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
10:04 am - 12:57 am
EYW
-
SJU
13h 53m
1 stop
Multiple Airlines Logo
7:05 am - 8:30 am
SJU
-
EYW
26h 25m
1 stop
$285Multiple Airlines
Wed, Nov 11 - Sun, Nov 15
Multiple Airlines Logo
10:04 am - 12:57 am
EYW
-
SJU
13h 53m
1 stop
Multiple Airlines Logo
6:12 pm - 12:19 pm
SJU
-
EYW
19h 07m
2 stops
$356Multiple Airlines
Wed, Nov 11 - Sun, Nov 15
Multiple Airlines Logo
12:05 pm - 7:32 pm
EYW
-
SJU
7h 27m
1 stop
Multiple Airlines Logo
3:10 am - 11:27 am
SJU
-
EYW
8h 17m
1 stop
$364Multiple Airlines
Thu, Aug 13 - Sun, Aug 16
Multiple Airlines Logo
7:53 pm - 4:11 pm
EYW
-
SJU
20h 18m
2 stops
Multiple Airlines Logo
5:22 pm - 12:34 pm
SJU
-
EYW
19h 12m
1 stop
$397Multiple Airlines
Thu, Aug 13 - Mon, Aug 17
American Airlines Logo
1:43 pm - 10:22 pm
EYW
-
SJU
8h 39m
1 stop
American Airlines Logo
8:25 am - 4:14 pm
SJU
-
EYW
8h 49m
1 stop
$466American Airlines
Fri, Oct 30 - Sun, Nov 1
American Airlines Logo
6:27 pm - 1:57 pm
EYW
-
SJU
19h 30m
2 stops
American Airlines Logo
6:00 am - 5:55 pm
SJU
-
EYW
11h 55m
2 stops
$486American Airlines
Tue, Sep 15 - Tue, Sep 29
American Airlines Logo
11:30 am - 8:47 pm
EYW
-
SJU
9h 17m
1 stop
American Airlines Logo
6:00 am - 7:17 pm
SJU
-
EYW
13h 17m
1 stop
$486American Airlines
Tue, Sep 15 - Tue, Sep 29
American Airlines Logo
3:30 pm - 11:00 am
EYW
-
SJU
19h 30m
2 stops
American Airlines Logo
6:00 am - 7:17 pm
SJU
-
EYW
13h 17m
1 stop
$486American Airlines
Tue, Sep 15 - Tue, Sep 29
American Airlines Logo
7:19 pm - 11:31 am
EYW
-
SJU
16h 12m
2 stops
American Airlines Logo
8:25 am - 1:11 pm
SJU
-
EYW
5h 46m
1 stop
$501American Airlines
Fri, Oct 30 - Sun, Nov 1
American Airlines Logo
8:09 pm - 9:43 am
EYW
-
SJU
13h 34m
1 stop
American Airlines Logo
1:38 pm - 7:39 pm
SJU
-
EYW
6h 01m
1 stop
$511American Airlines
Wed, Sep 2 - Sun, Sep 6

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United Airlines flights from Key West to Puerto Rico

Our best United Airlines deals on Key West to Puerto Rico flight tickets
United Airlines
Oct 30
EYW4:10 pmKey West
21h 30m
2 stops
SJU1:40 pmSan Juan Luis Munoz Marin Intl
Nov 1
SJU4:55 pmSan Juan Luis Munoz Marin Intl
21h 57m
3 stops
EYW1:52 pmKey West
$825
United Airlines
Oct 30
EYW4:10 pmKey West
31h 26m
2 stops
SJU11:36 pmSan Juan Luis Munoz Marin Intl
Nov 1
SJU4:55 pmSan Juan Luis Munoz Marin Intl
21h 57m
2 stops
EYW1:52 pmKey West
$832
United Airlines
Sep 17
EYW2:20 pmKey West
9h 30m
1 stop
SJU11:50 pmSan Juan Luis Munoz Marin Intl
Sep 19
SJU1:00 amSan Juan Luis Munoz Marin Intl
12h 29m
1 stop
EYW1:29 pmKey West
$895

American Airlines flights from Key West to Puerto Rico

Our best American Airlines deals on Key West to Puerto Rico flight tickets
American Airlines
Oct 30
EYW1:43 pmKey West
8h 39m
1 stop
SJU10:22 pmSan Juan Luis Munoz Marin Intl
Nov 1
SJU8:25 amSan Juan Luis Munoz Marin Intl
8h 49m
1 stop
EYW4:14 pmKey West
$466
American Airlines
Sep 15
EYW3:30 pmKey West
19h 30m
2 stops
SJU11:00 amSan Juan Luis Munoz Marin Intl
Sep 29
SJU6:00 amSan Juan Luis Munoz Marin Intl
13h 17m
1 stop
EYW7:17 pmKey West
$486
American Airlines
Oct 30
EYW7:19 pmKey West
16h 12m
2 stops
SJU11:31 amSan Juan Luis Munoz Marin Intl
Nov 1
SJU8:25 amSan Juan Luis Munoz Marin Intl
5h 46m
1 stop
EYW1:11 pmKey West
$501

momondo Fare Finder

 
Customize your flight search to find flights from Key West to Puerto Rico 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 August 1, 2026.
Use the filters below to find and compare flights from Key West to Puerto Rico that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

Key WestSan Juan

EYW - SJU

EYWSJU

Key West

Wed 11/11

10:04 am-12:57 am

1 stop13h 53m

San Juan Luis Munoz Marin Intl

Sun 11/15

7:05 am-8:30 am

1 stop26h 25m

$285

Key WestSan Juan

EYW - SJU

EYWSJU

Key West

Wed 11/11

10:04 am-12:57 am

1 stop13h 53m

San Juan Luis Munoz Marin Intl

Sun 11/15

6:12 pm-12:19 pm

2 stops19h 07m

$356
Quickest round-trip

Key WestSan Juan

EYW - SJU

EYWSJU

Key West

Thu 8/13

12:05 pm-7:32 pm

1 stop7h 27m

San Juan Luis Munoz Marin Intl

Sun 8/16

3:10 am-11:27 am

1 stop8h 17m

$364

Key WestSan Juan

EYW - SJU

EYWSJU

Key West

Thu 8/13

7:53 pm-4:11 pm

2 stops20h 18m

San Juan Luis Munoz Marin Intl

Mon 8/17

5:22 pm-12:34 pm

1 stop19h 12m

$397

Key WestSan Juan

EYW - SJU

EYWSJU

Key West

Fri 10/30

1:43 pm-10:22 pm

1 stop8h 39m

San Juan Luis Munoz Marin Intl

Sun 11/1

8:25 am-4:14 pm

1 stop8h 49m

$466

Key WestSan Juan

EYW - SJU

EYWSJU

Key West

Tue 9/15

6:27 pm-1:57 pm

2 stops19h 30m

San Juan Luis Munoz Marin Intl

Tue 9/29

6:00 am-5:55 pm

2 stops11h 55m

$486

Key WestSan Juan

EYW - SJU

EYWSJU

Key West

Tue 9/15

11:30 am-8:47 pm

1 stop9h 17m

San Juan Luis Munoz Marin Intl

Tue 9/29

6:00 am-7:17 pm

1 stop13h 17m

$486

Key WestSan Juan

EYW - SJU

EYWSJU

Key West

Tue 9/15

3:30 pm-11:00 am

2 stops19h 30m

San Juan Luis Munoz Marin Intl

Tue 9/29

6:00 am-7:17 pm

1 stop13h 17m

$486

Key WestSan Juan

EYW - SJU

EYWSJU

Key West

Fri 10/30

7:19 pm-11:31 am

2 stops16h 12m

San Juan Luis Munoz Marin Intl

Sun 11/1

8:25 am-1:11 pm

1 stop5h 46m

$501

Key WestSan Juan

EYW - SJU

EYWSJU

Key West

Wed 9/2

8:09 pm-9:43 am

1 stop13h 34m

San Juan Luis Munoz Marin Intl

Sun 9/6

1:38 pm-7:39 pm

1 stop6h 01m

$511

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 13 resultsSorted by cheapest first
1
2

Cheap Key West to Puerto Rico flight deals and tips

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

Fastest flight time

8h 18m

Direct flights

None
The fastest flight from Key West to Puerto Rico takes 8h 18m
There are no direct flights from Key West to Puerto Rico. There are no popular flight routes from Key West to Puerto Rico.
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Frequently asked questions about flying from Key West to Puerto Rico

  • When did momondo last update prices for flights from Key West Airport to Puerto Rico?

    Prices for flights from Key West Airport to Puerto Rico refresh daily.

  • How many operators does momondo search for flights from Key West Airport to Puerto Rico?

  • How old do you have to be to fly from Key West Airport to Puerto Rico?

    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 Key West Airport to Puerto Rico.

  • What documentation or ID do you need to fly to Puerto Rico?

    The travel and health documents required for your trip to Puerto Rico 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 Puerto Rico. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

Best airlines flying from Key West to Puerto Rico

Compare and see reviews for airlines that fly from Key West to Puerto Rico with momondo
Airline
Rating
Free Cancellation
Price
American AirlinesPriceFrom $415Free CancellationRating
7.1
11,845 reviews
Search American Airlines flights

Frequently asked questions about flying from Key West to Puerto Rico

  • How do I get Price Alerts for flights from Key West to Puerto Rico?

    You can take advantage of momondo’s Price Alerts by first searching for your flights to Key West from Puerto Rico. Flight offers will be shown to you in real-time. From there you can create a Price Alert by using our on-site widget.

  • How can I save money on flights from Key West to Puerto Rico with momondo?

    With “Price Forecast”, learn how soon you should book your flight in advance. Down to the day of week and time of day, our information can inform you on the ideal time to book to save on your travel. Our “Price Calendar” shows you at a quick glance when to book your travel for lower rates. By setting “Price Alerts” you can monitor changes in price and target the ideal time to book. Search for your trip destination by budget amount via our “Explore” feature. Whether you’re looking for ideas for your next travel adventure or cost-cutting tips, our “Discover” content is a great place to start.

  • How does momondo find its flight prices?

    We show prices from over 700+ competitors with a single click. With options from airlines and OTAs from across our 30 international markets, we are able to show you a diverse range of deals to create your adventure.

Why use momondo?

Why should I use momondo to find a flight deal from Key West to Puerto Rico?

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to Puerto Rico from Key West.

Can I find flights from Key West to Puerto Rico with flexible booking policies on momondo?

All flight searches from Key West to Puerto Rico on momondo can be filtered to show those which offer flexible booking policies.

How can momondo help me find flights from Key West to Puerto Rico?

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 Key West to Puerto Rico.

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

If you are not ready to book a flight from Key West to Puerto Rico now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Puerto Rico and let you know when they change.

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