HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Puerto Rico

$44+ 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 2/2. Fares are subject to change and may not be available on all flights or dates of travel.
MIA — SJU
Jan 26 — Feb 21
Sun 1/26
Sun 2/2
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

Discover tips and strategies to find the most affordable flight options for your journey from Key Largo (KE9) to Puerto Rico (PR0). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated January 21, 2025.

Round-trip from

$81
(Cheapflightsfares)

One-way from

$44
(Frontier)
From Key Largo to Puerto Rico
Search Deals
One-way flight from Key Largo to Puerto Rico
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 January 21, 2025.

This Cheapflightsfares deal was found by Cheapflights users on 1/21. 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 2/31:55 pmMIA - SJU
Nonstop2h 36mSpirit Airlines
Thu 2/66:55 pmSJU - MIA
Nonstop2h 54mSpirit Airlines
Deal found 1/21$81
This CheapOair deal was found by Cheapflights users on 1/21. 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.
Mon 2/310:17 pmMIA - SJU
Nonstop2h 42mMultiple Airlines
Wed 2/125:56 pmSJU - MIA
Nonstop2h 54mMultiple Airlines
Deal found 1/21$82
This FlightHub deal was found by Cheapflights users on 1/20. 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.
Mon 2/310:17 pmMIA - SJU
Nonstop2h 42mFrontier
Thu 2/61:28 pmSJU - MIA
Nonstop3h 00mFrontier
Deal found 1/20$83
This American Airlines deal was found by Cheapflights users on 1/21. 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.
Sun 2/28:15 pmMIA - SJU
Nonstop2h 49mAmerican Airlines
Tue 2/47:45 amSJU - MIA
Nonstop3h 00mAmerican Airlines
Deal found 1/21$166
This JetBlue deal was found by Cheapflights users on 1/20. 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 2/275:54 pmMIA - BQN
1 stop8h 12mJetBlue
Tue 3/44:26 amBQN - MIA
1 stop13h 33mJetBlue
Deal found 1/20$349
This United Airlines deal was found by Cheapflights users on 1/20. 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 3/42:29 pmMIA - BQN
1 stop8h 28mUnited Airlines
Mon 3/1012:09 amBQN - MIA
1 stop9h 04mUnited Airlines
Deal found 1/20$380
This Mytrip deal was found by Cheapflights users on 1/20. 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 3/64:32 pmMIA - CPX
2 stops16h 50mMultiple Airlines
Thu 3/138:54 amCPX - MIA
1 stop6h 43mMultiple Airlines
Deal found 1/20$491
This Mytrip deal was found by Cheapflights users on 1/20. 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.
Tue 2/411:30 amMIA - VQS
3 stops29h 09mMultiple Airlines
Sat 2/87:30 amVQS - MIA
1 stop14h 19mMultiple Airlines
Deal found 1/20$564
This United Airlines deal was found by Cheapflights users on 1/20. 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 2/278:45 amMIA - CPX
2 stops31h 36mUnited Airlines
Sun 3/210:48 amCPX - MIA
2 stops20h 06mUnited Airlines
Deal found 1/20$1,948

Find flights from Key Largo to Puerto Rico within your budget

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 January 21, 2025.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

MiamiSan Juan

MIA - SJU

MIASJU

Miami

Mon 2/3

1:55 pm-5:31 pm

Nonstop2h 36m

San Juan Luis Munoz Marin Intl

Thu 2/6

6:55 pm-8:49 pm

Nonstop2h 54m

$81

MiamiSan Juan

MIA - SJU

MIASJU

Miami

Mon 2/3

10:17 pm-1:59 am

Nonstop2h 42m

San Juan Luis Munoz Marin Intl

Wed 2/12

5:56 pm-7:50 pm

Nonstop2h 54m

$82

MiamiSan Juan

MIA - SJU

MIASJU

Miami

Mon 2/3

10:17 pm-1:59 am

Nonstop2h 42m

San Juan Luis Munoz Marin Intl

Thu 2/6

1:28 pm-3:28 pm

Nonstop3h 00m

$83

MiamiSan Juan

MIA - SJU

MIASJU

Miami

Sun 2/2

8:15 pm-12:04 am

Nonstop2h 49m

San Juan Luis Munoz Marin Intl

Tue 2/4

7:45 am-9:45 am

Nonstop3h 00m

$166

MiamiAguadilla

MIA - BQN

MIABQN

Miami

Thu 2/27

5:54 pm-3:06 am

1 stop8h 12m

Aguadilla Borinquen

Tue 3/4

4:26 am-4:59 pm

1 stop13h 33m

$349

MiamiAguadilla

MIA - BQN

MIABQN

Miami

Tue 3/4

2:29 pm-11:57 pm

1 stop8h 28m

Aguadilla Borinquen

Mon 3/10

12:09 am-9:13 am

1 stop9h 04m

$380

MiamiCulebra

MIA - CPX

MIACPX

Miami

Thu 3/6

4:32 pm-10:22 am

2 stops16h 50m

Culebra

Thu 3/13

8:54 am-3:37 pm

1 stop6h 43m

$491

MiamiVieques

MIA - VQS

MIAVQS

Miami

Tue 2/4

11:30 am-5:39 pm

3 stops29h 09m

Vieques

Sat 2/8

7:30 am-8:49 pm

1 stop14h 19m

$564

MiamiCulebra

MIA - CPX

MIACPX

Miami

Thu 2/27

8:45 am-5:21 pm

2 stops31h 36m

Culebra

Sun 3/2

10:48 am-5:54 am

2 stops20h 06m

$1,948

MiamiSan Juan

MIA - SJU

MIASJU

Miami

Sun 2/2

10:17 pm-1:59 am

Nonstop2h 42m

$44

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/20

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.

Travel insights for flights from Key Largo to Puerto Rico

Get recent, data-driven insights about flights from Key Largo to Puerto Rico including ideal travel times, pricing trends, and more.

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 March is currently the most expensive (average of $378). 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 January 21, 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 January 21, 2025.

The most flights from KE9 to PR0 are scheduled on a Saturday (25 on average). You will have fewer flight options on Wednesday, which is when the least amount of flights are scheduled (21 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 January 21, 2025.
Peruse reviews from past customers who have flown with Spirit Airlines, Frontier and American 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
8.1
Very good
4,662 reviews

Food

7.2

Boarding

8.2

Comfort

8.1

Entertainment

7.7

Crew

8.7

Overall

8.1

Reviews

1 / 10

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

Southwest
8.1
Very good
4,662 reviews
Southwest
8.1
Very good
4,662 reviews

Food

7.2

Boarding

8.2

Comfort

8.1

Entertainment

7.7

Crew

8.7

Overall

8.1

Reviews

1 / 10

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

Delta
8.0
Very good
8,521 reviews
Southwest
8.1
Very good
4,662 reviews

Food

7.2

Boarding

8.2

Comfort

8.1

Entertainment

7.7

Crew

8.7

Overall

8.1

Reviews

1 / 10

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

JetBlue
7.4
Good
3,201 reviews
Southwest
8.1
Very good
4,662 reviews

Food

7.2

Boarding

8.2

Comfort

8.1

Entertainment

7.7

Crew

8.7

Overall

8.1

Reviews

1 / 10

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

United Airlines
7.4
Good
8,984 reviews
Southwest
8.1
Very good
4,662 reviews

Food

7.2

Boarding

8.2

Comfort

8.1

Entertainment

7.7

Crew

8.7

Overall

8.1

Reviews

1 / 10

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

American Airlines
7.2
Good
10,000 reviews
Southwest
8.1
Very good
4,662 reviews

Food

7.2

Boarding

8.2

Comfort

8.1

Entertainment

7.7

Crew

8.7

Overall

8.1

Reviews

1 / 10

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

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 $44. However, be on the lookout for offers from Spirit Airlines 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 Qatar Airways (90%), Spirit Airlines (85%) or Frontier (80%) 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 $42. On average you can expect to pay $413. The most popular route, (Miami - San Juan Luis Munoz Marin Intl), can usually be booked for $76.

  • 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 March is currently the most expensive (average of $378). 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
Tampa to Luis Munoz Marin Intl flights
Miami to Luis Munoz Marin Intl flights
Fort Lauderdale to Luis Munoz Marin Intl flights
Miami to Santo Domingo flights
Orlando to Punta Cana flights
Miami to Punta Cana flights
Orlando to Santo Domingo flights
Fort Lauderdale to Punta Cana flights
Fort Lauderdale to Santo Domingo flights
Miami to Nassau flights
Orlando to Montego Bay flights
Fort Lauderdale to Montego Bay flights
Miami to Castries flights
Fort Lauderdale to Nassau flights
Orlando to Saint Thomas Island flights
Jacksonville to Luis Munoz Marin Intl flights
Miami to Simpson Bay flights
Miami to Port of Spain flights
Fort Lauderdale to Kingston flights
Miami to Oranjestad flights
Miami to Providenciales flights
Orlando to Ponce flights
Miami to Havana flights
Orlando to Santiago de los Caballeros flights
Miami to Saint Thomas Island flights
Miami to Santiago de los Caballeros flights
Orlando to Nassau flights
Orlando to Oranjestad flights
Miami to Montego Bay flights
Miami to Castries flights
Miami to Willemstad flights
Miami to Cap Haitien flights
Fort Lauderdale to Saint Thomas Island flights
Miami to George Town flights
West Palm Beach to Luis Munoz Marin Intl flights
Tampa to Punta Cana flights
Miami to Bridgetown flights
Miami to St. John's flights
Orlando to Castries flights
West Palm Beach to Nassau flights
Miami to Kingston flights
Fort Lauderdale to Santiago de los Caballeros flights
Orlando to Kingston flights
Orlando to Simpson Bay flights
Tampa to Nassau flights
Miami to Puerto Plata flights
Orlando to Aguadilla flights
Fort Lauderdale to Cap Haitien flights
Miami to Georgetown 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 January 21, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$47Average$139FlexibilityNo cancel feeOn-time62%
Spirit AirlinesCheapest$71Average$163FlexibilityNo cancel feeOn-time65%
JetBlueCheapest$95Average$258FlexibilityNo cancel feeOn-time62%
SouthwestCheapest$155Average$283FlexibilityNo cancel feeOn-time63%
American AirlinesCheapest$195Average$381FlexibilityNo cancel feeOn-time71%
DeltaCheapest$302Average$353FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$414Average$729FlexibilityNo 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.