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$47+ 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 5/20. Fares are subject to change and may not be available on all flights or dates of travel.
MIA — SJU
Apr 22 — Apr 291
Tue 4/22
Tue 4/29
1 adult, Economy
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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 April 17, 2025.

Most accurate provider

Expedia
1 star

Most trusted provider

Expedia
3 stars

Round-trip from

$104
(eDestinos)

One-way from

$52
(eDestinos)

Popular in

December

Cheapest in

September

Average price

$166
Provider with most accurate pricing for Miami-San Juan flight deals.
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Provider most trusted by Cheapflights users for Miami-San Juan flights.
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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. 19% potential increase in price ($39 potential increase over avg. RT price).
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Cheapest flight prices on average. 6% potential price decrease ($11 potential savings vs. average RT price).
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Average for round-trip flights in April 2025
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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 April 17, 2025.

This eDestinos deal was found by Cheapflights users on 4/16. 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 eDestinos is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/306:00 amMIA - SJU
Nonstop2h 26mSpirit Airlines
Wed 4/305:10 pmSJU - MIA
Nonstop2h 53mSpirit Airlines
Deal found 4/16$104
This Kiwi.com deal was found by Cheapflights users on 4/17. 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.
Sun 5/47:25 amMIA - SJU
Nonstop2h 35mFrontier
Fri 5/99:30 pmSJU - MIA
Nonstop2h 56mFrontier
Deal found 4/17$105
This FlightHub deal was found by Cheapflights users on 4/17. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/611:05 amMIA - SJU
1 stop8h 35mMultiple Airlines
Sat 5/109:30 pmSJU - MIA
Nonstop2h 56mMultiple Airlines
Deal found 4/17$107
This Southwest deal was found by Cheapflights users on 4/16. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/35:50 amMIA - SJU
1 stop13h 00mSouthwest
Sat 5/101:00 pmSJU - MIA
1 stop9h 40mSouthwest
Deal found 4/16$179
This CheapOair deal was found by Cheapflights users on 4/16. 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.
Sat 6/143:55 pmMIA - BQN
Nonstop2h 38mFrontier
Sat 6/217:28 pmBQN - MIA
Nonstop2h 39mFrontier
Deal found 4/16$189
This American Airlines deal was found by Cheapflights users on 4/17. 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.
Sat 11/810:30 pmMIA - SJU
Nonstop2h 40mAmerican Airlines
Mon 11/244:55 pmSJU - MIA
Nonstop2h 55mAmerican Airlines
Deal found 4/17$210
This United Airlines deal was found by Cheapflights users on 4/16. 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.
Thu 5/11:57 pmMIA - BQN
1 stop9h 12mUnited Airlines
Sun 5/412:15 amBQN - MIA
1 stop8h 55mUnited Airlines
Deal found 4/16$325
This Mytrip deal was found by Cheapflights users on 4/17. 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 5/26:00 amMIA - CPX
1 stop26h 34mMultiple Airlines
Tue 5/62:00 pmCPX - MIA
1 stop6h 03mMultiple Airlines
Deal found 4/17$432
This JetBlue deal was found by Cheapflights users on 4/17. 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 JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/152:30 pmMIA - BQN
1 stop11h 31mJetBlue
Sun 5/185:05 amBQN - MIA
1 stop8h 26mJetBlue
Deal found 4/17$496
This United deal was found by Cheapflights users on 4/16. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 7/137:00 amMIA - MAZ
2 stops11h 42mMultiple Airlines
Sat 7/195:00 pmMAZ - MIA
2 stops18h 04mMultiple Airlines
Deal found 4/16$1,049
This United deal was found by Cheapflights users on 4/17. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/612:06 pmMIA - VQS
2 stops20h 19mMultiple Airlines
Mon 6/94:20 pmVQS - MIA
2 stops16h 51mMultiple Airlines
Deal found 4/17$1,106
This United Airlines deal was found by Cheapflights users on 4/17. 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.
Sun 5/254:17 pmMIA - CPX
2 stops25h 04mUnited Airlines
Wed 5/2810:48 amCPX - MIA
2 stops18h 57mUnited Airlines
Deal found 4/17$1,179

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 April 17, 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

Sun 5/4

7:25 am-10:00 am

Nonstop2h 35m

San Juan Luis Munoz Marin Intl

Fri 5/9

9:30 pm-12:26 am

Nonstop2h 56m

$105

MiamiSan Juan

MIA - SJU

MIASJU

Miami

Tue 5/6

11:05 am-7:40 pm

1 stop8h 35m

San Juan Luis Munoz Marin Intl

Sat 5/10

9:30 pm-12:26 am

Nonstop2h 56m

$107

MiamiSan Juan

MIA - SJU

MIASJU

Miami

Mon 4/28

6:00 am-8:26 am

Nonstop2h 26m

San Juan Luis Munoz Marin Intl

Tue 4/29

5:10 pm-8:03 pm

Nonstop2h 53m

$116

MiamiAguadilla

MIA - BQN

MIABQN

Miami

Sat 6/14

3:55 pm-6:33 pm

Nonstop2h 38m

Aguadilla Borinquen

Sat 6/21

7:28 pm-10:07 pm

Nonstop2h 39m

$189

MiamiSan Juan

MIA - SJU

MIASJU

Miami

Sat 5/17

5:50 am-6:50 pm

1 stop13h 00m

San Juan Luis Munoz Marin Intl

Sat 5/24

5:25 am-4:00 pm

2 stops10h 35m

$248

MiamiAguadilla

MIA - BQN

MIABQN

Miami

Thu 5/1

1:57 pm-11:09 pm

1 stop9h 12m

Aguadilla Borinquen

Sun 5/4

12:15 am-9:10 am

1 stop8h 55m

$325

MiamiCulebra

MIA - CPX

MIACPX

Miami

Fri 5/2

6:00 am-8:34 am

1 stop26h 34m

Culebra

Tue 5/6

2:00 pm-8:03 pm

1 stop6h 03m

$432

MiamiAguadilla

MIA - BQN

MIABQN

Miami

Thu 5/15

2:30 pm-2:01 am

1 stop11h 31m

Aguadilla Borinquen

Sun 5/18

5:05 am-1:31 pm

1 stop8h 26m

$496

MiamiMayagüez

MIA - MAZ

MIAMAZ

Miami

Sun 7/13

7:00 am-6:42 pm

2 stops11h 42m

Mayagüez Eugenio M De Hostos

Sat 7/19

5:00 pm-11:04 am

2 stops18h 04m

$1,049

MiamiVieques

MIA - VQS

MIAVQS

Miami

Fri 6/6

12:06 pm-8:25 am

2 stops20h 19m

Vieques

Mon 6/9

4:20 pm-9:11 am

2 stops16h 51m

$1,106

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/17

Showing 1-10 of 23 results
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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 December is currently the most expensive (average of $336). 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 April 17, 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 April 17, 2025.

The most flights from KE9 to PR0 are scheduled on a Thursday (19 on average). You will have fewer flight options on Sunday, which is when the least amount of flights are scheduled (14 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 April 17, 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
4,280 reviews

Boarding

8.2

Overall

8.0

Food

7.1

Crew

8.6

Comfort

8.0

Entertainment

7.6

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.
Southwest
8.0
Very good
4,280 reviews
Southwest
8.0
Very good
4,280 reviews

Boarding

8.2

Overall

8.0

Food

7.1

Crew

8.6

Comfort

8.0

Entertainment

7.6

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.
Delta
8.0
Very good
7,917 reviews
Southwest
8.0
Very good
4,280 reviews

Boarding

8.2

Overall

8.0

Food

7.1

Crew

8.6

Comfort

8.0

Entertainment

7.6

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.
United Airlines
7.4
Good
8,667 reviews
Southwest
8.0
Very good
4,280 reviews

Boarding

8.2

Overall

8.0

Food

7.1

Crew

8.6

Comfort

8.0

Entertainment

7.6

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.
JetBlue
7.3
Good
2,926 reviews
Southwest
8.0
Very good
4,280 reviews

Boarding

8.2

Overall

8.0

Food

7.1

Crew

8.6

Comfort

8.0

Entertainment

7.6

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.
American Airlines
7.2
Good
10,000 reviews
Southwest
8.0
Very good
4,280 reviews

Boarding

8.2

Overall

8.0

Food

7.1

Crew

8.6

Comfort

8.0

Entertainment

7.6

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.

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 Spirit Airlines, with whom users have recently found tickets for as low as $52. However, be on the lookout for offers from Frontier and American Airlines, 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 - Culebra 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 Royal Air Maroc (100%), Spirit Airlines (80%) or Frontier (77%) 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 $49. On average you can expect to pay $424. The most popular route, (Miami - San Juan Luis Munoz Marin Intl), can usually be booked for $104.

  • 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 December is currently the most expensive (average of $336). 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

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Alternative routes for Key Largo to Puerto Rico

See prices for flight routes from nearby airports that may be better suited for you.
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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 April 17, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$47Average$150FlexibilityNo cancel feeOn-time62%
Spirit AirlinesCheapest$62Average$163FlexibilityNo cancel feeOn-time65%
JetBlueCheapest$83Average$263FlexibilityNo cancel feeOn-time62%
SouthwestCheapest$160Average$306FlexibilityNo cancel feeOn-time63%
American AirlinesCheapest$200Average$400FlexibilityNo cancel feeOn-time71%
DeltaCheapest$302Average$302FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$385Average$575FlexibilityNo cancel feeOn-time69%

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