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$41+ 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 3/31. Fares are subject to change and may not be available on all flights or dates of travel.
MIA — SJU
Feb 25 — Mar 41
Tue 2/25
Tue 3/4
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 February 20, 2025.

Most accurate provider

Expedia
1 star

Most trusted provider

Expedia
3 stars

Round-trip from

$85
(eDestinos)

One-way from

$41
(Mytrip)

Popular in

December

Cheapest in

September

Average price

$170
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
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One-way flight from Key Largo to Puerto Rico
Search Deals
Highest demand for flights based on searches. 20% potential increase in price ($42 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 February 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 February 20, 2025.

This Cheapflightsfares deal was found by Cheapflights users on 2/20. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/117:10 amMIA - SJU
Nonstop2h 34mFrontier
Tue 3/189:35 pmSJU - MIA
Nonstop3h 03mFrontier
Deal found 2/20$83
This Cheapflightsfares deal was found by Cheapflights users on 2/19. 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.
Tue 3/117:10 amMIA - SJU
Nonstop2h 34mMultiple Airlines
Tue 3/1812:49 pmSJU - MIA
Nonstop2h 48mMultiple Airlines
Deal found 2/19$86
This eDestinos deal was found by Cheapflights users on 2/20. 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 eDestinos is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 2/251:25 pmMIA - SJU
Nonstop2h 36mSpirit Airlines
Fri 2/285:56 pmSJU - MIA
Nonstop2h 54mSpirit Airlines
Deal found 2/20$87
This Southwest deal was found by Cheapflights users on 2/20. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/712:45 pmMIA - SJU
1 stop9h 45mSouthwest
Sun 5/117:05 amSJU - MIA
1 stop12h 10mSouthwest
Deal found 2/20$175
This Delta deal was found by Cheapflights users on 2/20. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/234:47 pmMIA - SJU
1 stop6h 28mDelta
Mon 4/287:15 amSJU - MIA
1 stop11h 12mDelta
Deal found 2/20$215
This JetBlue deal was found by Cheapflights users on 2/19. 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.
Fri 4/252:08 pmMIA - BQN
1 stop9h 48mJetBlue
Sun 4/271:26 amBQN - MIA
1 stop9h 26mJetBlue
Deal found 2/19$359
This United deal was found by Cheapflights users on 2/19. 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.
Tue 3/182:32 pmMIA - BQN
1 stop8h 25mUnited Airlines
Mon 3/2412:09 amBQN - MIA
1 stop11h 09mUnited Airlines
Deal found 2/19$375
This Mytrip deal was found by Cheapflights users on 2/19. 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 3/69:20 amMIA - VQS
1 stop23h 10mMultiple Airlines
Mon 3/105:59 pmVQS - MIA
1 stop21h 38mMultiple Airlines
Deal found 2/19$431
This Mytrip deal was found by Cheapflights users on 2/20. 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.
Fri 3/73:56 pmMIA - CPX
2 stops17h 26mMultiple Airlines
Tue 3/1110:48 amCPX - MIA
1 stop4h 49mMultiple Airlines
Deal found 2/20$589
This United Airlines deal was found by Cheapflights users on 2/19. 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 7/207:00 amMIA - VQS
2 stops36h 15mUnited Airlines
Sat 7/268:50 amVQS - MIA
2 stops50h 31mUnited Airlines
Deal found 2/19$1,446
This United Airlines deal was found by Cheapflights users on 2/19. 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 7/204:17 pmMIA - CPX
2 stops24h 34mUnited Airlines
Fri 7/2510:13 amCPX - MIA
2 stops12h 24mUnited Airlines
Deal found 2/19$1,906
This United Airlines deal was found by Cheapflights users on 2/19. 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.
Wed 3/54:07 pmMIA - MAZ
2 stops46h 42mUnited Airlines
Sat 6/141:50 pmMAZ - MIA
2 stops21h 27mUnited Airlines
Deal found 2/19$1,959

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 February 20, 2025.

Fly from

Key Largo

Fly to

Puerto Rico

Route

Depart

Return

Price

MiamiSan Juan

MIA - SJU

MIASJU

Miami

Tue 3/11

7:10 am-9:44 am

Nonstop2h 34m

San Juan Luis Munoz Marin Intl

Tue 3/18

9:35 pm-12:38 am

Nonstop3h 03m

$83

MiamiSan Juan

MIA - SJU

MIASJU

Miami

Tue 3/11

7:10 am-9:44 am

Nonstop2h 34m

San Juan Luis Munoz Marin Intl

Tue 3/18

12:49 pm-3:37 pm

Nonstop2h 48m

$86

MiamiSan Juan

MIA - SJU

MIASJU

Miami

Tue 2/25

1:25 pm-5:01 pm

Nonstop2h 36m

San Juan Luis Munoz Marin Intl

Fri 2/28

5:56 pm-7:50 pm

Nonstop2h 54m

$87

MiamiSan Juan

MIA - SJU

MIASJU

Miami

Wed 5/7

12:45 pm-10:30 pm

1 stop9h 45m

San Juan Luis Munoz Marin Intl

Sun 5/11

7:05 am-7:15 pm

1 stop12h 10m

$175

MiamiSan Juan

MIA - SJU

MIASJU

Miami

Wed 4/23

4:47 pm-11:15 pm

1 stop6h 28m

San Juan Luis Munoz Marin Intl

Mon 4/28

7:15 am-6:27 pm

1 stop11h 12m

$215

MiamiAguadilla

MIA - BQN

MIABQN

Miami

Fri 4/25

2:08 pm-11:56 pm

1 stop9h 48m

Aguadilla Borinquen

Sun 4/27

1:26 am-10:52 am

1 stop9h 26m

$359

MiamiAguadilla

MIA - BQN

MIABQN

Miami

Tue 3/18

2:32 pm-10:57 pm

1 stop8h 25m

Aguadilla Borinquen

Mon 3/24

12:09 am-11:18 am

1 stop11h 09m

$375

MiamiVieques

MIA - VQS

MIAVQS

Miami

Thu 3/6

9:20 am-9:30 am

1 stop23h 10m

Vieques

Mon 3/10

5:59 pm-3:37 pm

1 stop21h 38m

$431

MiamiCulebra

MIA - CPX

MIACPX

Miami

Fri 3/7

3:56 pm-10:22 am

2 stops17h 26m

Culebra

Tue 3/11

10:48 am-3:37 pm

1 stop4h 49m

$589

MiamiMayagüez

MIA - MAZ

MIAMAZ

Miami

Wed 3/5

4:07 pm-3:49 pm

2 stops46h 42m

Mayagüez Eugenio M De Hostos

Sat 6/14

1:50 pm-11:17 am

2 stops21h 27m

$1,959

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/20

Showing 1-10 of 25 results
1
2
3

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 $363). 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 February 20, 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 February 20, 2025.

The most flights from KE9 to PR0 are scheduled on a Monday (24 on average). You will have fewer flight options on Friday, which is when the least amount of flights are scheduled (20 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 February 20, 2025.
Peruse reviews from past customers who have flown with Southwest, Delta and JetBlue 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
4,411 reviews

Food

7.1

Overall

8.1

Comfort

8.1

Crew

8.7

Entertainment

7.6

Boarding

8.2

Reviews

1 / 20

2.0
Mediocre

Anonymous,Feb 2025

MCO - STL

Cancelled at last minute, SWA unable to assist in formulating alternate plans. Wound up renting a car and driving 13 hours to beat bad weather forecast at home. Not SWA’s fault that there was significant bad weather across the country.

Southwest
8.1
Very good
4,411 reviews
Southwest
8.1
Very good
4,411 reviews

Food

7.1

Overall

8.1

Comfort

8.1

Crew

8.7

Entertainment

7.6

Boarding

8.2

Reviews

1 / 20

2.0
Mediocre

Anonymous,Feb 2025

MCO - STL

Cancelled at last minute, SWA unable to assist in formulating alternate plans. Wound up renting a car and driving 13 hours to beat bad weather forecast at home. Not SWA’s fault that there was significant bad weather across the country.

Delta
8.0
Very good
8,220 reviews
Southwest
8.1
Very good
4,411 reviews

Food

7.1

Overall

8.1

Comfort

8.1

Crew

8.7

Entertainment

7.6

Boarding

8.2

Reviews

1 / 20

2.0
Mediocre

Anonymous,Feb 2025

MCO - STL

Cancelled at last minute, SWA unable to assist in formulating alternate plans. Wound up renting a car and driving 13 hours to beat bad weather forecast at home. Not SWA’s fault that there was significant bad weather across the country.

JetBlue
7.4
Good
3,070 reviews
Southwest
8.1
Very good
4,411 reviews

Food

7.1

Overall

8.1

Comfort

8.1

Crew

8.7

Entertainment

7.6

Boarding

8.2

Reviews

1 / 20

2.0
Mediocre

Anonymous,Feb 2025

MCO - STL

Cancelled at last minute, SWA unable to assist in formulating alternate plans. Wound up renting a car and driving 13 hours to beat bad weather forecast at home. Not SWA’s fault that there was significant bad weather across the country.

United Airlines
7.4
Good
8,766 reviews
Southwest
8.1
Very good
4,411 reviews

Food

7.1

Overall

8.1

Comfort

8.1

Crew

8.7

Entertainment

7.6

Boarding

8.2

Reviews

1 / 20

2.0
Mediocre

Anonymous,Feb 2025

MCO - STL

Cancelled at last minute, SWA unable to assist in formulating alternate plans. Wound up renting a car and driving 13 hours to beat bad weather forecast at home. Not SWA’s fault that there was significant bad weather across the country.

American Airlines
7.2
Good
10,000 reviews
Southwest
8.1
Very good
4,411 reviews

Food

7.1

Overall

8.1

Comfort

8.1

Crew

8.7

Entertainment

7.6

Boarding

8.2

Reviews

1 / 20

2.0
Mediocre

Anonymous,Feb 2025

MCO - STL

Cancelled at last minute, SWA unable to assist in formulating alternate plans. Wound up renting a car and driving 13 hours to beat bad weather forecast at home. Not SWA’s fault that there was significant bad weather across the country.

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 $41. However, be on the lookout for offers from Frontier 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 - 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 (91%), British Airways (79%) or Iberia (73%) 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 $38. On average you can expect to pay $407. The most popular route, (Miami - San Juan Luis Munoz Marin Intl), can usually be booked for $75.

  • 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 $363). 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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See prices for flight routes from nearby airports that may be better suited for you.
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Top 6 airlines flying from Key Largo to Puerto Rico

Discover the top 6 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 February 20, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$47Average$136FlexibilityNo cancel feeOn-time62%
Spirit AirlinesCheapest$66Average$161FlexibilityNo cancel feeOn-time65%
JetBlueCheapest$93Average$274FlexibilityNo cancel feeOn-time62%
SouthwestCheapest$155Average$278FlexibilityNo cancel feeOn-time63%
American AirlinesCheapest$196Average$400FlexibilityNo cancel feeOn-time71%
DeltaCheapest$237Average$344FlexibilityNo cancel feeOn-timeN/A
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