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Cheap flights from Key West to Puerto Rico from $279

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 1/1. 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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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
12:20 pm - 10:05 pmEYW-SJU
8h 45m1 stop
Multiple Airlines Logo
3:55 am - 12:26 pmSJU-EYW
9h 31m1 stop
$279Multiple Airlines
Find Deal
Thu, Jan 1 - Sun, Jan 11
Multiple Airlines Logo
2:30 pm - 1:59 pmEYW-SJU
22h 29m1 stop
Multiple Airlines Logo
6:00 am - 12:26 pmSJU-EYW
7h 26m1 stop
$282Multiple Airlines
Find Deal
Sat, Jan 3 - Mon, Jan 12
Multiple Airlines Logo
2:30 pm - 1:59 pmEYW-SJU
22h 29m1 stop
Multiple Airlines Logo
6:30 am - 9:09 amSJU-EYW
27h 39m1 stop
$295Multiple Airlines
Find Deal
Sat, Jan 3 - Sun, Jan 11
Multiple Airlines Logo
2:30 pm - 10:05 pmEYW-SJU
6h 35m1 stop
Multiple Airlines Logo
3:55 am - 12:26 pmSJU-EYW
9h 31m1 stop
$302Multiple Airlines
Find Deal
Wed, Dec 31 - Sun, Jan 11
Multiple Airlines Logo
12:20 pm - 10:05 pmEYW-SJU
8h 45m1 stop
Multiple Airlines Logo
2:29 am - 9:26 amSJU-EYW
31h 57m2 stops
$304Multiple Airlines
Find Deal
Thu, Jan 1 - Fri, Jan 9
Multiple Airlines Logo
12:20 pm - 10:05 pmEYW-SJU
8h 45m1 stop
Multiple Airlines Logo
3:55 am - 9:26 amSJU-EYW
6h 31m1 stop
$311Multiple Airlines
Find Deal
Thu, Jan 1 - Sat, Jan 10
Multiple Airlines Logo
2:30 pm - 1:59 pmEYW-SJU
22h 29m1 stop
Multiple Airlines Logo
3:55 am - 9:26 amSJU-EYW
6h 31m1 stop
$313Multiple Airlines
Find Deal
Sat, Jan 3 - Sat, Jan 10
Multiple Airlines Logo
10:37 pm - 1:17 pmEYW-SJU
37h 40m2 stops
Multiple Airlines Logo
6:00 am - 12:26 pmSJU-EYW
7h 26m1 stop
$314Multiple Airlines
Find Deal
Sun, Jan 4 - Mon, Jan 12
Multiple Airlines Logo
12:20 pm - 10:05 pmEYW-SJU
8h 45m1 stop
Multiple Airlines Logo
3:55 am - 9:26 amSJU-EYW
6h 31m1 stop
$323Multiple Airlines
Find Deal
Thu, Jan 1 - Wed, Jan 7
Multiple Airlines Logo
2:30 pm - 1:59 pmEYW-SJU
22h 29m1 stop
Multiple Airlines Logo
3:55 am - 9:26 amSJU-EYW
6h 31m1 stop
$325Multiple Airlines
Find Deal
Sat, Jan 3 - Wed, Jan 7

American Airlines flights from Key West to Puerto Rico

Our best American Airlines deals on Key West to Puerto Rico flight tickets
American Airlines
Feb 21
EYW7:35 pmKey West
15h 20m
1 stop
SJU11:55 amSan Juan Luis Munoz Marin Intl
Feb 28
SJU10:57 amSan Juan Luis Munoz Marin Intl
12h 52m
1 stop
EYW10:49 pmKey West
$390
Find similar
American Airlines
Feb 2
EYW12:00 pmKey West
5h 22m
1 stop
SJU6:22 pmSan Juan Luis Munoz Marin Intl
Feb 6
SJU3:49 pmSan Juan Luis Munoz Marin Intl
6h 58m
1 stop
EYW9:47 pmKey West
$473
Find similar
American Airlines
Feb 2
EYW7:08 amKey West
10h 14m
2 stops
SJU6:22 pmSan Juan Luis Munoz Marin Intl
Feb 6
SJU11:38 amSan Juan Luis Munoz Marin Intl
11h 09m
2 stops
EYW9:47 pmKey West
$514
Find similar

Spirit Airlines flights from Key West to Puerto Rico

Our best Spirit Airlines deals on Key West to Puerto Rico flight tickets
Spirit Airlines
Jan 2
EYW2:30 pmKey West
6h 35m
1 stop
SJU10:05 pmSan Juan Luis Munoz Marin Intl
Jan 11
SJU9:29 pmSan Juan Luis Munoz Marin Intl
17h 01m
2 stops
EYW1:30 pmKey West
$351
Find similar
Spirit Airlines
Jan 2
EYW2:30 pmKey West
6h 35m
1 stop
SJU10:05 pmSan Juan Luis Munoz Marin Intl
Jan 11
SJU5:50 pmSan Juan Luis Munoz Marin Intl
20h 40m
3 stops
EYW1:30 pmKey West
$397
Find similar
Spirit Airlines
Jan 2
EYW2:30 pmKey West
6h 35m
1 stop
SJU10:05 pmSan Juan Luis Munoz Marin Intl
Jan 10
SJU5:00 pmSan Juan Luis Munoz Marin Intl
19h 20m
3 stops
EYW11:20 amKey West
$444
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 November 25, 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

Thu 1/1

12:20 pm-10:05 pm

1 stop8h 45m

San Juan Luis Munoz Marin Intl

Sun 1/11

3:55 am-12:26 pm

1 stop9h 31m

$279

Key WestSan Juan

EYW - SJU

EYWSJU

Key West

Sat 1/3

2:30 pm-1:59 pm

1 stop22h 29m

San Juan Luis Munoz Marin Intl

Mon 1/12

6:00 am-12:26 pm

1 stop7h 26m

$282

Key WestSan Juan

EYW - SJU

EYWSJU

Key West

Sat 1/3

2:30 pm-1:59 pm

1 stop22h 29m

San Juan Luis Munoz Marin Intl

Sun 1/11

6:30 am-9:09 am

1 stop27h 39m

$295

Key WestSan Juan

EYW - SJU

EYWSJU

Key West

Wed 12/31

2:30 pm-10:05 pm

1 stop6h 35m

San Juan Luis Munoz Marin Intl

Sun 1/11

3:55 am-12:26 pm

1 stop9h 31m

$302

Key WestSan Juan

EYW - SJU

EYWSJU

Key West

Thu 1/1

12:20 pm-10:05 pm

1 stop8h 45m

San Juan Luis Munoz Marin Intl

Fri 1/9

2:29 am-9:26 am

2 stops31h 57m

$304

Key WestSan Juan

EYW - SJU

EYWSJU

Key West

Thu 1/1

12:20 pm-10:05 pm

1 stop8h 45m

San Juan Luis Munoz Marin Intl

Sat 1/10

3:55 am-9:26 am

1 stop6h 31m

$311

Key WestSan Juan

EYW - SJU

EYWSJU

Key West

Sat 1/3

2:30 pm-1:59 pm

1 stop22h 29m

San Juan Luis Munoz Marin Intl

Sat 1/10

3:55 am-9:26 am

1 stop6h 31m

$313

Key WestSan Juan

EYW - SJU

EYWSJU

Key West

Sun 1/4

10:37 pm-1:17 pm

2 stops37h 40m

San Juan Luis Munoz Marin Intl

Mon 1/12

6:00 am-12:26 pm

1 stop7h 26m

$314

Key WestSan Juan

EYW - SJU

EYWSJU

Key West

Thu 1/1

12:20 pm-10:05 pm

1 stop8h 45m

San Juan Luis Munoz Marin Intl

Wed 1/7

3:55 am-9:26 am

1 stop6h 31m

$323

Key WestSan Juan

EYW - SJU

EYWSJU

Key West

Sat 1/3

2:30 pm-1:59 pm

1 stop22h 29m

San Juan Luis Munoz Marin Intl

Wed 1/7

3:55 am-9:26 am

1 stop6h 31m

$325

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

Fastest flight time

6h 21m

Direct flights

None
The fastest flight from Key West to Puerto Rico takes 6h 21m
There are no direct flights from Key West to Puerto Rico. There are no popular flight routes from Key West to Puerto Rico.
Search flight deals

  • 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 $360Free CancellationRating
7.2
11,038 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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