HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Puerto Rico

$73+ Cheap flights from Key Largo, FL 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 10/25. Fares are subject to change and may not be available on all flights or dates of travel.
MIA — SJU
Jun 17 — Jun 241
Tue 6/17
Tue 6/24
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Key Largo to Puerto Rico with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheap flight deals from Key Largo to Puerto Rico

Keep the following information in mind while searching for Key Largo to Puerto Rico flight deals. Data was last updated June 12, 2025.

Round-trip from

$128
(Kiwi.com)

One-way from

$74
(CheapOair)

Popular in

December

Cheapest in

September

Average price

$213
From Key Largo to Puerto Rico
Search Deals
One-way flight from Key Largo to Puerto Rico
Search Deals
Highest demand for flights based on searches. 12% potential increase in price ($26 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease ($10 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in June 2025
Search Deals

Find flight deals from Key Largo to Puerto Rico

Cheapest flights from Key Largo to Puerto Rico
Explore the most affordable flight options available from Key Largo to Puerto Rico. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 12, 2025.

This Kiwi.com deal was found by Cheapflights users on 6/11. 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.
Wed 6/256:33 pmMIA - SJU
Nonstop2h 31mSpirit Airlines
Thu 6/267:36 pmSJU - MIA
Nonstop2h 50mSpirit Airlines
Deal found 6/11$128
This Kiwi.com deal was found by Cheapflights users on 6/11. 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.
Tue 6/243:40 pmMIA - SJU
Nonstop2h 49mMultiple Airlines
Thu 6/267:36 pmSJU - MIA
Nonstop2h 50mMultiple Airlines
Deal found 6/11$132
This Priceline deal was found by Cheapflights users on 6/11. 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 10/314:10 pmMIA - SJU
1 stop7h 48mFrontier
Sat 11/11:11 amSJU - MIA
1 stop22h 50mFrontier
Deal found 6/11$145
This Cheapflightsfares deal was found by Cheapflights users on 6/12. 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.
Sat 7/53:55 pmMIA - BQN
Nonstop2h 41mFrontier
Sat 7/197:31 pmBQN - MIA
Nonstop2h 35mFrontier
Deal found 6/12$196
This American Airlines deal was found by Cheapflights users on 6/11. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/1612:10 pmMIA - SJU
Nonstop2h 43mAmerican Airlines
Mon 9/297:05 pmSJU - MIA
Nonstop2h 45mAmerican Airlines
Deal found 6/11$240
This Mytrip deal was found by Cheapflights users on 6/11. 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.
Thu 6/266:33 pmMIA - CPX
1 stop20h 11mMultiple Airlines
Mon 6/3012:31 pmCPX - MIA
1 stop11h 06mMultiple Airlines
Deal found 6/11$447
This United Airlines deal was found by Cheapflights users on 6/9. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/227:00 amMIA - BQN
2 stops16h 09mUnited Airlines
Wed 11/261:09 amBQN - MIA
1 stop9h 40mUnited Airlines
Deal found 6/9$598
This Mytrip deal was found by Cheapflights users on 6/11. 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.
Fri 7/1110:10 amMIA - VQS
1 stop9h 05mMultiple Airlines
Fri 7/182:45 pmVQS - MIA
1 stop25h 36mMultiple Airlines
Deal found 6/11$606
This United Airlines deal was found by Cheapflights users on 6/10. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/81:30 pmMIA - CPX
2 stops27h 21mUnited Airlines
Wed 7/1610:13 amCPX - MIA
2 stops12h 32mUnited Airlines
Deal found 6/10$1,079
This United Airlines deal was found by Cheapflights users on 6/11. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/134:53 pmMIA - VQS
2 stops49h 07mUnited Airlines
Mon 9/228:45 amVQS - MIA
2 stops50h 17mUnited Airlines
Deal found 6/11$1,152
This United Airlines deal was found by Cheapflights users on 6/10. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/104:16 pmMIA - MAZ
2 stops24h 11mUnited Airlines
Tue 6/172:00 pmMAZ - MIA
2 stops21h 17mUnited Airlines
Deal found 6/10$2,229

Cheapflights Fare Finder

Customize your flight search to find flights from Key Largo 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 June 12, 2025.
Use the filters below to find and compare flights from Key Largo to Puerto Rico that are best for you.

Fly from

Key Largo

Fly to

Puerto Rico

Route

Depart

Return

Price

MiamiSan Juan

MIA - SJU

MIASJU

Miami

Wed 6/25

6:33 pm-9:04 pm

Nonstop2h 31m

San Juan Luis Munoz Marin Intl

Thu 6/26

7:36 pm-10:26 pm

Nonstop2h 50m

$128

MiamiSan Juan

MIA - SJU

MIASJU

Miami

Tue 6/24

3:40 pm-6:29 pm

Nonstop2h 49m

San Juan Luis Munoz Marin Intl

Thu 6/26

7:36 pm-10:26 pm

Nonstop2h 50m

$132

MiamiSan Juan

MIA - SJU

MIASJU

Miami

Fri 10/31

4:10 pm-11:58 pm

1 stop7h 48m

San Juan Luis Munoz Marin Intl

Sat 11/1

1:11 am-12:01 am

1 stop22h 50m

$145

MiamiAguadilla

MIA - BQN

MIABQN

Miami

Sat 7/5

3:55 pm-6:36 pm

Nonstop2h 41m

Aguadilla Borinquen

Sat 7/19

7:31 pm-10:06 pm

Nonstop2h 35m

$196

MiamiSan Juan

MIA - SJU

MIASJU

Miami

Tue 9/16

12:10 pm-2:53 pm

Nonstop2h 43m

San Juan Luis Munoz Marin Intl

Mon 9/29

7:05 pm-9:50 pm

Nonstop2h 45m

$240

MiamiCulebra

MIA - CPX

MIACPX

Miami

Thu 6/26

6:33 pm-2:44 pm

1 stop20h 11m

Culebra

Mon 6/30

12:31 pm-11:37 pm

1 stop11h 06m

$447

MiamiAguadilla

MIA - BQN

MIABQN

Miami

Tue 7/22

7:00 am-11:09 pm

2 stops16h 09m

Aguadilla Borinquen

Wed 11/26

1:09 am-9:49 am

1 stop9h 40m

$598

MiamiVieques

MIA - VQS

MIAVQS

Miami

Fri 7/11

10:10 am-7:15 pm

1 stop9h 05m

Vieques

Fri 7/18

2:45 pm-4:21 pm

1 stop25h 36m

$606

MiamiCulebra

MIA - CPX

MIACPX

Miami

Tue 7/8

1:30 pm-4:51 pm

2 stops27h 21m

Culebra

Tue 7/15

10:13 am-10:45 pm

2 stops12h 32m

$1,079

MiamiVieques

MIA - VQS

MIAVQS

Miami

Sat 9/13

4:53 pm-6:00 pm

2 stops49h 07m

Vieques

Mon 9/22

8:45 am-11:02 am

2 stops50h 17m

$1,152

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/10

Showing 1-10 of 18 results
1
2

Best time to book a flight from Key Largo to Puerto Rico

Have a flexible travel schedule? Discover the best time to fly to Puerto Rico from Key Largo 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 Key Largo to Puerto Rico

What is the cheapest month to book a flight from Key Largo to Puerto Rico?

Currently, September is the cheapest month in which you can book a flight from Key Largo to Puerto Rico (average of $254). Flying from Key Largo 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.

What is the cheapest time of day to fly from KE9 to PR?

Find hourly flight availability from Key Largo to Puerto Rico. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated June 12, 2025.

When flying from Key Largo to Puerto Rico, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Weekly flight availability from Key Largo to Puerto Rico

Explore weekly flight availability from Key Largo to Puerto Rico. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated June 12, 2025.

The most flights from KE9 to PR0 are scheduled on a Thursday (20 on average). You will have fewer flight options on Friday, which is when the least amount of flights are scheduled (16 on average).

Rainfall in Puerto Rico by month

Plan your trip to Puerto Rico by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Puerto Rico ranges from 2.2 - 6.1 inches per month. November is typically the wettest month, when rainfall can reach 6.1 in. February is typically the driest time to visit Puerto Rico when rainfall is around 2.2 in.

Temperature in Puerto Rico by month

Plan your trip to Puerto Rico by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Puerto Rico, use this chart to help with planning. For those seeking warmer temperatures, June is the ideal time of year to visit, when temperatures reach an average of 82.4 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 77.0 F).

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 June 12, 2025.
Peruse reviews from past customers who have flown with Southwest, Delta and United Airlines from Key Largo to Puerto Rico to help guide your decision. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.0
Very good
4,287 reviews

Food

7.1

Boarding

8.2

Entertainment

7.6

Overall

8.0

Comfort

8.0

Crew

8.6

Reviews

1 / 20
8.0
Excellent

John,May 2025

PVD - BNA

It’s southwest so no frills but clean, efficient and got me to my location.
Southwest
8.0
Very good
4,287 reviews
Southwest
8.0
Very good
4,287 reviews

Food

7.1

Boarding

8.2

Entertainment

7.6

Overall

8.0

Comfort

8.0

Crew

8.6

Reviews

1 / 20
8.0
Excellent

John,May 2025

PVD - BNA

It’s southwest so no frills but clean, efficient and got me to my location.
Delta
8.0
Very good
7,950 reviews
Southwest
8.0
Very good
4,287 reviews

Food

7.1

Boarding

8.2

Entertainment

7.6

Overall

8.0

Comfort

8.0

Crew

8.6

Reviews

1 / 20
8.0
Excellent

John,May 2025

PVD - BNA

It’s southwest so no frills but clean, efficient and got me to my location.
United Airlines
7.4
Good
8,790 reviews
Southwest
8.0
Very good
4,287 reviews

Food

7.1

Boarding

8.2

Entertainment

7.6

Overall

8.0

Comfort

8.0

Crew

8.6

Reviews

1 / 20
8.0
Excellent

John,May 2025

PVD - BNA

It’s southwest so no frills but clean, efficient and got me to my location.
American Airlines
7.2
Good
10,000 reviews
Southwest
8.0
Very good
4,287 reviews

Food

7.1

Boarding

8.2

Entertainment

7.6

Overall

8.0

Comfort

8.0

Crew

8.6

Reviews

1 / 20
8.0
Excellent

John,May 2025

PVD - BNA

It’s southwest so no frills but clean, efficient and got me to my location.
Spirit Airlines
6.3
Okay
8,052 reviews
Southwest
8.0
Very good
4,287 reviews

Food

7.1

Boarding

8.2

Entertainment

7.6

Overall

8.0

Comfort

8.0

Crew

8.6

Reviews

1 / 20
8.0
Excellent

John,May 2025

PVD - BNA

It’s southwest so no frills but clean, efficient and got me to my location.

Related info for your journey

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

  • What are the cheapest airlines to fly from Key Largo to Puerto Rico one-way?

    The cheapest airline one-way is Frontier, with whom users have recently found tickets for as low as $74. However, be on the lookout for offers from Spirit Airlines and Southwest, as they are both options that can get you from Key Largo to Puerto Rico for a low price.

  • What are the most popular routes from Key Largo to Puerto Rico?

    Most travelers choose Miami - San Juan Luis Munoz Marin Intl, Miami - Aguadilla Borinquen or Miami - Vieques when deciding on the best route from Key Largo to Puerto Rico.

  • What are the most reliable airlines from Key Largo to Puerto Rico?

    Consider Qatar Airways (88%), Spirit Airlines (84%) or Frontier (84%) when booking your flight. These represent the most reliable airlines when flying from Key Largo to Puerto Rico.

  • What are the cheapest flights from Key Largo to Puerto Rico?

    The cheapest flight price from Key Largo to Puerto Rico is $65. On average you can expect to pay $278. The most popular route, (Miami - San Juan Luis Munoz Marin Intl), can usually be booked for $118.

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

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

  • How can I find direct flights from Key Largo to Puerto Rico?

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

  • Can I find deals for business class flights from Key Largo to Puerto Rico?

    Yes. Cheapflights offers flight deals from Key Largo 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 Key Largo to Puerto Rico?

    Currently, September is the cheapest month in which you can book a flight from Key Largo to Puerto Rico (average of $254). Flying from Key Largo 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

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Key Largo to Puerto Rico

See prices for flight routes from nearby airports that may be better suited for you.
Orlando to Luis Munoz Marin Intl flights
Fort Lauderdale to Luis Munoz Marin Intl flights
Miami to Luis Munoz Marin Intl flights
Tampa to Luis Munoz Marin Intl flights
Orlando to Ponce flights
Orlando to Punta Cana flights
Fort Lauderdale to Punta Cana flights
Orlando to Montego Bay flights
Miami to Punta Cana flights
Miami to Santo Domingo flights
Fort Lauderdale to Santo Domingo flights
Fort Lauderdale to Montego Bay flights
Miami to Nassau flights
Orlando to Santo Domingo flights
Orlando to Santiago de los Caballeros flights
Miami to Montego Bay flights
Fort Lauderdale to Nassau flights
Fort Lauderdale to Kingston flights
Orlando to Aguadilla flights
Miami to Castries flights
Orlando to Castries flights
Miami to Oranjestad flights
Miami to Cap Haitien flights
Miami to Willemstad flights
Miami to Havana flights
Jacksonville to Luis Munoz Marin Intl flights
Fort Lauderdale to Santiago de los Caballeros flights
Miami to Port of Spain flights
Orlando to Oranjestad flights
Orlando to Saint Thomas Island flights
Miami to Bridgetown flights
Miami to Kingston flights
Orlando to Nassau flights
Fort Lauderdale to Saint Thomas Island flights
Miami to Castries flights
Miami to Providenciales flights
Miami to Santiago de los Caballeros flights
Miami to Simpson Bay flights
West Palm Beach to Luis Munoz Marin Intl flights
Miami to Saint Thomas Island flights
Fort Lauderdale to Marsh Harbour flights
Tampa to Punta Cana flights
Tampa to Nassau flights
Fort Lauderdale to Oranjestad flights
Tampa to Santo Domingo flights
Miami to George Town flights
Fort Lauderdale to Port of Spain flights
Miami to St. John's flights
Jacksonville to Montego Bay flights
Tampa to Saint Thomas Island flights

Top 7 airlines flying from Key Largo to Puerto Rico

Discover the top 7 airlines that operate flights from Key Largo 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 June 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$47Average$144FlexibilityNo cancel feeOn-time62%
Spirit AirlinesCheapest$61Average$159FlexibilityNo cancel feeOn-time65%
JetBlueCheapest$83Average$259FlexibilityNo cancel feeOn-time62%
SouthwestCheapest$175Average$306FlexibilityNo cancel feeOn-time63%
American AirlinesCheapest$200Average$403FlexibilityNo cancel feeOn-time71%
DeltaCheapest$302Average$302FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$325Average$504FlexibilityNo cancel feeOn-time69%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.