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Cheap flights from Key West to Puerto Rico from $385

This is the cheapest round-trip 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 10/1. 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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Cheap round-trip flights

American Airlines Logo
3:45 pm - 11:11 amEYW-SJU
19h 26m2 stops
American Airlines Logo
7:00 am - 12:55 pmSJU-EYW
5h 55m1 stop
$385American Airlines
Find Deal
Wed, Oct 1 - Mon, Oct 6
American Airlines Logo
12:07 pm - 5:10 pmEYW-SJU
4h 03m1 stop
American Airlines Logo
5:50 am - 11:07 amSJU-EYW
6h 17m1 stop
$405American Airlines
Find Deal
Thu, Dec 11 - Sun, Dec 14
American Airlines Logo
12:07 pm - 5:10 pmEYW-SJU
4h 03m1 stop
American Airlines Logo
5:50 am - 3:11 pmSJU-EYW
10h 21m2 stops
$454American Airlines
Find Deal
Thu, Dec 11 - Sun, Dec 14
American Airlines Logo
8:10 am - 9:05 pmEYW-SJU
11h 55m2 stops
American Airlines Logo
5:50 am - 6:30 pmSJU-EYW
13h 40m2 stops
$543American Airlines
Find Deal
Thu, Dec 11 - Sun, Dec 14
American Airlines Logo
11:26 am - 4:05 pmEYW-SJU
4h 39m1 stop
American Airlines Logo
6:00 am - 10:53 amSJU-EYW
4h 53m1 stop
$600American Airlines
Find Deal
Fri, Aug 29 - Mon, Sep 1
American Airlines Logo
4:49 pm - 11:09 amEYW-SJU
18h 20m2 stops
American Airlines Logo
6:00 am - 12:58 pmSJU-EYW
6h 58m1 stop
$625American Airlines
Find Deal
Fri, Aug 29 - Mon, Sep 1
American Airlines Logo
7:40 pm - 4:05 pmEYW-SJU
20h 25m1 stop
American Airlines Logo
12:00 pm - 7:07 pmSJU-EYW
7h 07m1 stop
$633American Airlines
Find Deal
Thu, Aug 28 - Tue, Sep 2
American Airlines Logo
10:57 am - 12:45 pmEYW-SJU
25h 48m1 stop
American Airlines Logo
6:00 am - 7:07 pmSJU-EYW
13h 07m1 stop
$653American Airlines
Find Deal
Thu, Aug 28 - Tue, Sep 2
American Airlines Logo
12:50 pm - 10:56 pmEYW-SJU
10h 06m1 stop
American Airlines Logo
6:00 am - 7:07 pmSJU-EYW
13h 07m1 stop
$700American Airlines
Find Deal
Fri, Aug 29 - Mon, Sep 1
United Airlines Logo
3:02 pm - 12:36 amEYW-SJU
8h 34m1 stop
United Airlines Logo
2:05 am - 3:09 pmSJU-EYW
14h 04m2 stops
$867United Airlines
Find Deal
Thu, Dec 11 - Sat, Dec 13

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 1
EYW3:45 pmKey West
19h 26m
2 stops
SJU11:11 amSan Juan Luis Munoz Marin Intl
Oct 6
SJU7:00 amSan Juan Luis Munoz Marin Intl
5h 55m
1 stop
EYW12:55 pmKey West
$385
Find similar
American Airlines
Dec 11
EYW12:07 pmKey West
4h 03m
1 stop
SJU5:10 pmSan Juan Luis Munoz Marin Intl
Dec 14
SJU5:50 amSan Juan Luis Munoz Marin Intl
6h 17m
1 stop
EYW11:07 amKey West
$405
Find similar
American Airlines
Dec 11
EYW12:07 pmKey West
4h 03m
1 stop
SJU5:10 pmSan Juan Luis Munoz Marin Intl
Dec 14
SJU5:50 amSan Juan Luis Munoz Marin Intl
10h 21m
2 stops
EYW3:11 pmKey West
$454
Find similar

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 17, 2025.
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

Key WestSan Juan

EYW - SJU

EYWSJU

Key West

Wed 10/1

3:45 pm-11:11 am

2 stops19h 26m

San Juan Luis Munoz Marin Intl

Mon 10/6

7:00 am-12:55 pm

1 stop5h 55m

$385

Key WestSan Juan

EYW - SJU

EYWSJU

Key West

Thu 12/11

12:07 pm-5:10 pm

1 stop4h 03m

San Juan Luis Munoz Marin Intl

Sun 12/14

5:50 am-11:07 am

1 stop6h 17m

$405

Key WestSan Juan

EYW - SJU

EYWSJU

Key West

Thu 12/11

12:07 pm-5:10 pm

1 stop4h 03m

San Juan Luis Munoz Marin Intl

Sun 12/14

5:50 am-3:11 pm

2 stops10h 21m

$454

Key WestSan Juan

EYW - SJU

EYWSJU

Key West

Thu 12/11

8:10 am-9:05 pm

2 stops11h 55m

San Juan Luis Munoz Marin Intl

Sun 12/14

5:50 am-6:30 pm

2 stops13h 40m

$543

Key WestSan Juan

EYW - SJU

EYWSJU

Key West

Fri 8/29

11:26 am-4:05 pm

1 stop4h 39m

San Juan Luis Munoz Marin Intl

Mon 9/1

6:00 am-10:53 am

1 stop4h 53m

$600

Key WestSan Juan

EYW - SJU

EYWSJU

Key West

Fri 8/29

4:49 pm-11:09 am

2 stops18h 20m

San Juan Luis Munoz Marin Intl

Mon 9/1

6:00 am-12:58 pm

1 stop6h 58m

$625

Key WestSan Juan

EYW - SJU

EYWSJU

Key West

Thu 8/28

7:40 pm-4:05 pm

1 stop20h 25m

San Juan Luis Munoz Marin Intl

Tue 9/2

12:00 pm-7:07 pm

1 stop7h 07m

$633

Key WestSan Juan

EYW - SJU

EYWSJU

Key West

Thu 8/28

10:57 am-12:45 pm

1 stop25h 48m

San Juan Luis Munoz Marin Intl

Tue 9/2

6:00 am-7:07 pm

1 stop13h 07m

$653

Key WestSan Juan

EYW - SJU

EYWSJU

Key West

Fri 8/29

12:50 pm-10:56 pm

1 stop10h 06m

San Juan Luis Munoz Marin Intl

Mon 9/1

6:00 am-7:07 pm

1 stop13h 07m

$700

Key WestSan Juan

EYW - SJU

EYWSJU

Key West

Thu 12/11

3:02 pm-12:36 am

1 stop8h 34m

San Juan Luis Munoz Marin Intl

Sat 12/13

2:05 am-3:09 pm

2 stops14h 04m

$867

Flights are sorted by cheapest round-trip flights first.

Sorted by cheapest first

See travel insights to Puerto Rico from

How to get the cheapest flight ticket from Key West to Puerto Rico

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 time of day to depart on your flight to Puerto Rico?

Our most recent data shows that the best time of day to fly to Puerto Rico is in the morning. Flights from Key West to Puerto Rico during this time can be as low as $404. In contrast, the most expensive time of day to depart to Puerto Rico is in the afternoon when prices are around $448.

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

Best Price Found

$385

Fastest flight time

4h 03m

Direct flights

None

Airports in Puerto Rico

1 airport
The best flight deal from Key West to Puerto Rico found on momondo in the last 72 hours is $385
The fastest flight from Key West to Puerto Rico takes 4h 03m
There are no direct flights from Key West to Puerto Rico. Popular non-direct route for this connection is Key West Airport - San Juan Luis Munoz Marin Intl Airport.
There is 1 airport near Puerto Rico: San Juan Luis Munoz Marin Intl (SJU)
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  • 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 $304Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights

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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