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Puerto Rico

$74+ Cheap flights from Florida Keys to Puerto Rico

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 10/6. Fares are subject to change and may not be available on all flights or dates of travel.
EYW — SJU
Sep 4 — Sep 111
Thu 9/4
Thu 9/11
1 adult, Economy
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Cheap flight deals from Florida Keys to Puerto Rico

Keep the following information in mind while searching for Florida Keys to Puerto Rico flight deals. Data was last updated August 30, 2025.

Round-trip from

$148
(Frontier)

One-way from

$74
(eDestinos)

Popular in

January

Cheapest in

April

Average price

$408
From Florida Keys to Puerto Rico
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One-way flight from Florida Keys to Puerto Rico
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Highest demand for flights based on searches. 24% potential increase in price ($152 potential increase over avg. RT price).
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Cheapest flight prices on average. 8% potential price decrease ($39 potential savings vs. average RT price).
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Average for round-trip flights in August 2025
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Find flight deals from Florida Keys to Puerto Rico

Cheapest flights from Florida Keys to Puerto Rico
Explore the most affordable flight options available from Florida Keys to Puerto Rico. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 30, 2025.

This Frontier deal was found by Cheapflights users on 8/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/256:59 pmMIA - SJU
2 stops14h 57mFrontier
Fri 9/267:50 pmSJU - MIA
Nonstop2h 47mFrontier
Deal found 8/29$148
This Cheapflightsfares deal was found by Cheapflights users on 8/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/247:59 amMIA - SJU
Nonstop2h 39mFrontier
Mon 10/279:06 pmSJU - MIA
Nonstop2h 50mFrontier
Deal found 8/28$150
This Priceline deal was found by Cheapflights users on 8/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/316:15 amMIA - SJU
Nonstop2h 44mFrontier
Fri 9/127:50 pmSJU - MIA
Nonstop2h 47mFrontier
Deal found 8/29$151
This CheapOair deal was found by Cheapflights users on 8/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/95:13 pmMIA - SJU
Nonstop2h 43mFrontier
Sun 10/129:06 pmSJU - MIA
Nonstop2h 50mFrontier
Deal found 8/29$153
This Kiwi.com deal was found by Cheapflights users on 8/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/205:13 pmMIA - SJU
Nonstop2h 43mFrontier
Thu 10/239:06 pmSJU - MIA
Nonstop2h 50mFrontier
Deal found 8/29$154
This Cheapflightsfares deal was found by Cheapflights users on 8/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/312:27 pmMIA - SJU
Nonstop2h 43mFrontier
Thu 11/66:54 pmSJU - MIA
Nonstop2h 51mFrontier
Deal found 8/28$156
This Frontier deal was found by Cheapflights users on 8/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/312:27 pmMIA - SJU
Nonstop2h 43mFrontier
Fri 11/76:54 pmSJU - MIA
Nonstop2h 51mFrontier
Deal found 8/28$158
This Frontier deal was found by Cheapflights users on 8/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/213:55 pmMIA - SJU
Nonstop2h 50mFrontier
Thu 9/2510:57 amSJU - MIA
Nonstop2h 53mFrontier
Deal found 8/29$159
This SmartFares deal was found by Cheapflights users on 8/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/217:10 amMIA - SJU
Nonstop2h 42mFrontier
Sun 10/510:57 amSJU - MIA
Nonstop2h 53mFrontier
Deal found 8/28$160
This CheapOair deal was found by Cheapflights users on 8/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/143:55 pmMIA - SJU
Nonstop2h 50mFrontier
Fri 9/197:50 pmSJU - MIA
Nonstop2h 47mFrontier
Deal found 8/29$161
This Priceline deal was found by Cheapflights users on 8/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/263:55 pmMIA - SJU
Nonstop2h 50mFrontier
Fri 10/37:50 pmSJU - MIA
Nonstop2h 47mFrontier
Deal found 8/27$163
This Mytrip deal was found by Cheapflights users on 8/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/77:10 amMIA - SJU
Nonstop2h 42mFrontier
Fri 9/127:50 pmSJU - MIA
Nonstop2h 47mFrontier
Deal found 8/28$164

Cheapflights Fare Finder

 
Customize your flight search to find flights from Florida Keys 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, Cheapflights users made 2,558,603 searches. Data last updated August 30, 2025.
Use the filters below to find and compare flights from Florida Keys to Puerto Rico that are best for you.

Fly from

Florida Keys

Fly to

Puerto Rico

Route

Depart

Return

Price

MiamiSan Juan

MIA - SJU

MIASJU

Miami

Fri 10/24

7:59 am-10:38 am

Nonstop2h 39m

San Juan Luis Munoz Marin Intl

Mon 10/27

9:06 pm-11:56 pm

Nonstop2h 50m

$150

MiamiSan Juan

MIA - SJU

MIASJU

Miami

Thu 10/23

5:13 pm-7:56 pm

Nonstop2h 43m

San Juan Luis Munoz Marin Intl

Sun 10/26

9:06 pm-11:56 pm

Nonstop2h 50m

$161

MiamiSan Juan

MIA - SJU

MIASJU

Miami

Mon 10/6

7:10 am-9:52 am

Nonstop2h 42m

San Juan Luis Munoz Marin Intl

Mon 10/20

9:06 pm-11:56 pm

Nonstop2h 50m

$161

MiamiSan Juan

MIA - SJU

MIASJU

Miami

Fri 9/26

3:55 pm-6:45 pm

Nonstop2h 50m

San Juan Luis Munoz Marin Intl

Fri 10/3

7:50 pm-10:37 pm

Nonstop2h 47m

$163

MiamiSan Juan

MIA - SJU

MIASJU

Miami

Fri 12/5

8:59 pm-12:37 am

Nonstop2h 38m

San Juan Luis Munoz Marin Intl

Sun 12/7

7:00 am-9:01 am

Nonstop3h 01m

$166

MiamiSan Juan

MIA - SJU

MIASJU

Miami

Thu 10/16

5:13 pm-7:56 pm

Nonstop2h 43m

San Juan Luis Munoz Marin Intl

Mon 10/20

9:06 pm-11:56 pm

Nonstop2h 50m

$166

MiamiSan Juan

MIA - SJU

MIASJU

Miami

Fri 10/3

3:55 pm-6:45 pm

Nonstop2h 50m

San Juan Luis Munoz Marin Intl

Sun 10/5

10:57 am-1:50 pm

Nonstop2h 53m

$166

MiamiSan Juan

MIA - SJU

MIASJU

Miami

Fri 11/7

9:45 pm-1:32 am

Nonstop2h 47m

San Juan Luis Munoz Marin Intl

Mon 11/10

9:30 am-11:17 am

Nonstop2h 47m

$166

MiamiSan Juan

MIA - SJU

MIASJU

Miami

Fri 11/14

12:27 pm-4:10 pm

Nonstop2h 43m

San Juan Luis Munoz Marin Intl

Sun 11/16

9:45 am-11:32 am

Nonstop2h 47m

$166

MiamiSan Juan

MIA - SJU

MIASJU

Miami

Fri 9/19

3:55 pm-6:45 pm

Nonstop2h 50m

San Juan Luis Munoz Marin Intl

Sun 9/21

7:50 pm-10:37 pm

Nonstop2h 47m

$166

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/30

Showing 1-10 of 56 results
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Best time to book a flight from Florida Keys to Puerto Rico

Have a flexible travel schedule? Discover the best time to fly to Puerto Rico from Florida Keys with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Florida Keys to Puerto Rico
No data available for this route at this time. Please check back soon.

Reviews of airlines servicing Puerto Rico

Get insights into the airlines that provide service to Puerto Rico. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Puerto Rico. Reviews last updated August 30, 2025.
Read reviews from past customers who have flown Delta, American Airlines, and JetBlue from Florida Keys to Puerto Rico. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,978 reviews

Entertainment

7.9

Boarding

8.2

Crew

8.5

Comfort

7.9

Overall

8.0

Food

7.3

Reviews

1 / 20
6.0
Good

pilar,May 2025

RSW - ATL

The stewardess was not very nice because I requested two glasses of water. She didn’t even offer the snacks to me. She seemed angry and I felt very bad about her reaction. Also, the flight was full and you could not move. The airline should provide seats for obese people in consideration to the rest pf the passengers.
Delta
8.0
Very good
7,978 reviews
Delta
8.0
Very good
7,978 reviews

Entertainment

7.9

Boarding

8.2

Crew

8.5

Comfort

7.9

Overall

8.0

Food

7.3

Reviews

1 / 20
6.0
Good

pilar,May 2025

RSW - ATL

The stewardess was not very nice because I requested two glasses of water. She didn’t even offer the snacks to me. She seemed angry and I felt very bad about her reaction. Also, the flight was full and you could not move. The airline should provide seats for obese people in consideration to the rest pf the passengers.
American Airlines
7.2
Good
10,000 reviews
Delta
8.0
Very good
7,978 reviews

Entertainment

7.9

Boarding

8.2

Crew

8.5

Comfort

7.9

Overall

8.0

Food

7.3

Reviews

1 / 20
6.0
Good

pilar,May 2025

RSW - ATL

The stewardess was not very nice because I requested two glasses of water. She didn’t even offer the snacks to me. She seemed angry and I felt very bad about her reaction. Also, the flight was full and you could not move. The airline should provide seats for obese people in consideration to the rest pf the passengers.
JetBlue
7.2
Good
2,920 reviews
Delta
8.0
Very good
7,978 reviews

Entertainment

7.9

Boarding

8.2

Crew

8.5

Comfort

7.9

Overall

8.0

Food

7.3

Reviews

1 / 20
6.0
Good

pilar,May 2025

RSW - ATL

The stewardess was not very nice because I requested two glasses of water. She didn’t even offer the snacks to me. She seemed angry and I felt very bad about her reaction. Also, the flight was full and you could not move. The airline should provide seats for obese people in consideration to the rest pf the passengers.
Spirit Airlines
6.3
Okay
8,019 reviews
Delta
8.0
Very good
7,978 reviews

Entertainment

7.9

Boarding

8.2

Crew

8.5

Comfort

7.9

Overall

8.0

Food

7.3

Reviews

1 / 20
6.0
Good

pilar,May 2025

RSW - ATL

The stewardess was not very nice because I requested two glasses of water. She didn’t even offer the snacks to me. She seemed angry and I felt very bad about her reaction. Also, the flight was full and you could not move. The airline should provide seats for obese people in consideration to the rest pf the passengers.
Frontier
5.8
Fair
3,203 reviews
Delta
8.0
Very good
7,978 reviews

Entertainment

7.9

Boarding

8.2

Crew

8.5

Comfort

7.9

Overall

8.0

Food

7.3

Reviews

1 / 20
6.0
Good

pilar,May 2025

RSW - ATL

The stewardess was not very nice because I requested two glasses of water. She didn’t even offer the snacks to me. She seemed angry and I felt very bad about her reaction. Also, the flight was full and you could not move. The airline should provide seats for obese people in consideration to the rest pf the passengers.

Related info for your journey

Find useful and relevant information for your journey from Florida Keys to Puerto Rico. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Florida Keys to Puerto Rico?

    For as low as $150, Frontier can have you in Puerto Rico from Florida Keys in 2h 39m. Airlines will cover a distance of 1044 mi. This flight may include one or multiple stops.

  • Can I find deals for flights from Florida Keys to Puerto Rico that include hotel bookings?

    Yes. In addition to deals on Florida Keys to Puerto Rico flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Florida Keys to Puerto Rico?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Florida Keys to Puerto Rico.

  • Can I find deals for business class flights from Florida Keys to Puerto Rico?

    Yes. Cheapflights offers flight deals from Florida Keys to Puerto Rico by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Florida Keys to Puerto Rico?

    Currently, September is the cheapest month in which you can book a flight from Florida Keys to Puerto Rico (average of $254). Flying from Florida Keys to Puerto Rico in June is currently the most expensive (average of $339). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Florida Keys to Puerto Rico

See prices for flight routes from nearby airports that may be better suited for you.
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Top airline flying from Florida Keys to Puerto Rico

Discover the top airline that operate flights from Florida Keys to Puerto Rico. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated August 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$360Average$455FlexibilityNo cancel feeOn-time71%

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