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$60+ 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 7/12. Fares are subject to change and may not be available on all flights or dates of travel.
MIA — SJU
Jul 8 — Jul 151
Tue 7/8
Tue 7/15
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 July 3, 2025.

Round-trip from

$120
(Priceline)

One-way from

$60
(Priceline)

Popular in

December

Cheapest in

September

Average price

$194
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. 11% potential increase in price ($24 potential increase over avg. RT price).
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Cheapest flight prices on average. 5% potential price decrease ($9 potential savings vs. average RT price).
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Average for round-trip flights in July 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 July 3, 2025.

This Frontier deal was found by Cheapflights users on 6/30. 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 7/109:04 pmMIA - SJU
Nonstop2h 55mFrontier
Thu 7/175:15 pmSJU - MIA
Nonstop2h 49mFrontier
Deal found 6/30$141
This FlightHub deal was found by Cheapflights users on 7/2. 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.
Wed 7/910:10 amMIA - SJU
Nonstop2h 26mSpirit Airlines
Wed 7/161:31 pmSJU - MIA
Nonstop2h 50mSpirit Airlines
Deal found 7/2$144
This Kiwi.com deal was found by Cheapflights users on 6/30. 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 7/83:40 pmMIA - SJU
Nonstop2h 51mMultiple Airlines
Fri 7/111:31 pmSJU - MIA
Nonstop2h 50mMultiple Airlines
Deal found 6/30$147
This Southwest deal was found by Cheapflights users on 7/2. 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 9/1311:40 amMIA - SJU
1 stop11h 00mSouthwest
Wed 9/175:00 amSJU - MIA
1 stop7h 05mSouthwest
Deal found 7/2$189
This Frontier deal was found by Cheapflights users on 7/1. 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 7/244:57 pmMIA - BQN
2 stops17h 24mFrontier
Sat 7/267:31 pmBQN - MIA
Nonstop2h 35mFrontier
Deal found 7/1$242
This Mytrip deal was found by Cheapflights users on 7/2. 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.
Mon 7/2110:10 amMIA - MAZ
1 stop8h 32mMultiple Airlines
Mon 7/285:00 pmMAZ - MIA
2 stops16h 15mMultiple Airlines
Deal found 7/2$408
This United Airlines deal was found by Cheapflights users on 7/2. 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.
Mon 9/222:55 pmMIA - BQN
1 stop8h 14mUnited Airlines
Mon 9/2912:15 amBQN - MIA
1 stop9h 56mUnited Airlines
Deal found 7/2$425
This Mytrip deal was found by Cheapflights users on 7/2. 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 7/1710:10 amMIA - CPX
1 stop6h 41mMultiple Airlines
Mon 7/213:05 pmCPX - MIA
2 stops18h 10mMultiple Airlines
Deal found 7/2$440
This Mytrip deal was found by Cheapflights users on 7/2. 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 7/184:51 pmMIA - VQS
2 stops26h 24mMultiple Airlines
Tue 7/228:45 amVQS - MIA
1 stop7h 36mMultiple Airlines
Deal found 7/2$560
This United Airlines deal was found by Cheapflights users on 7/2. 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.
Fri 9/122:55 pmMIA - VQS
2 stops28h 20mUnited Airlines
Fri 9/198:45 amVQS - MIA
2 stops27h 31mUnited Airlines
Deal found 7/2$1,040
This United Airlines deal was found by Cheapflights users on 7/2. 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.
Fri 9/1212:50 pmMIA - CPX
2 stops28h 01mUnited Airlines
Fri 9/1910:13 amCPX - MIA
2 stops13h 37mUnited Airlines
Deal found 7/2$1,129
This United Airlines deal was found by Cheapflights users on 7/3. 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.
Mon 7/214:53 pmMIA - MAZ
2 stops47h 34mUnited Airlines
Mon 7/282:00 pmMAZ - MIA
2 stops21h 49mUnited Airlines
Deal found 7/3$2,338

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 July 3, 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

Thu 7/10

9:04 pm-11:59 pm

Nonstop2h 55m

San Juan Luis Munoz Marin Intl

Thu 7/17

5:15 pm-8:04 pm

Nonstop2h 49m

$141

MiamiSan Juan

MIA - SJU

MIASJU

Miami

Wed 7/9

10:10 am-12:36 pm

Nonstop2h 26m

San Juan Luis Munoz Marin Intl

Wed 7/16

1:31 pm-4:21 pm

Nonstop2h 50m

$144

MiamiSan Juan

MIA - SJU

MIASJU

Miami

Tue 7/8

3:40 pm-6:31 pm

Nonstop2h 51m

San Juan Luis Munoz Marin Intl

Fri 7/11

1:31 pm-4:21 pm

Nonstop2h 50m

$147

MiamiSan Juan

MIA - SJU

MIASJU

Miami

Sat 9/13

2:25 pm-10:40 pm

1 stop8h 15m

San Juan Luis Munoz Marin Intl

Wed 9/17

3:45 pm-9:10 pm

1 stop5h 25m

$189

MiamiAguadilla

MIA - BQN

MIABQN

Miami

Thu 7/24

4:57 pm-10:21 am

2 stops17h 24m

Aguadilla Borinquen

Sat 7/26

7:31 pm-10:06 pm

Nonstop2h 35m

$242

MiamiMayagüez

MIA - MAZ

MIAMAZ

Miami

Mon 7/21

10:10 am-6:42 pm

1 stop8h 32m

Mayagüez Eugenio M De Hostos

Mon 7/28

5:00 pm-9:15 am

2 stops16h 15m

$408

MiamiAguadilla

MIA - BQN

MIABQN

Miami

Mon 9/22

2:55 pm-11:09 pm

1 stop8h 14m

Aguadilla Borinquen

Mon 9/29

12:15 am-10:11 am

1 stop9h 56m

$425

MiamiCulebra

MIA - CPX

MIACPX

Miami

Thu 7/17

10:10 am-4:51 pm

1 stop6h 41m

Culebra

Mon 7/21

3:05 pm-9:15 am

2 stops18h 10m

$440

MiamiVieques

MIA - VQS

MIAVQS

Miami

Fri 7/18

4:51 pm-7:15 pm

2 stops26h 24m

Vieques

Tue 7/22

8:45 am-4:21 pm

1 stop7h 36m

$560

MiamiVieques

MIA - VQS

MIAVQS

Miami

Fri 9/12

2:55 pm-7:15 pm

2 stops28h 20m

Vieques

Fri 9/19

8:45 am-12:16 pm

2 stops27h 31m

$1,040

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/1

Showing 1-10 of 22 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 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 July 3, 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.

What is the cheapest day to fly from Key Largo to Puerto Rico?

Use this chart to determine the cheapest time to fly round-trip from Key Largo to Puerto Rico. Price data was last updated on December 16, 2024.

Travelers seeking maximum savings on their Key Largo to Puerto Rico flight should consider departing on Saturday afternoons when fares are most often at their lowest. Saturday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.

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 July 3, 2025.

The most flights from KE9 to PR0 are scheduled on a Wednesday (18 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (3 on average).

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 July 3, 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. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.0
Very good
4,266 reviews

Comfort

8.0

Entertainment

7.6

Boarding

8.2

Food

7.0

Overall

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
4,266 reviews
Southwest
8.0
Very good
4,266 reviews

Comfort

8.0

Entertainment

7.6

Boarding

8.2

Food

7.0

Overall

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
7,982 reviews
Southwest
8.0
Very good
4,266 reviews

Comfort

8.0

Entertainment

7.6

Boarding

8.2

Food

7.0

Overall

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
8,861 reviews
Southwest
8.0
Very good
4,266 reviews

Comfort

8.0

Entertainment

7.6

Boarding

8.2

Food

7.0

Overall

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
4,266 reviews

Comfort

8.0

Entertainment

7.6

Boarding

8.2

Food

7.0

Overall

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
8,086 reviews
Southwest
8.0
Very good
4,266 reviews

Comfort

8.0

Entertainment

7.6

Boarding

8.2

Food

7.0

Overall

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 $60. 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 - Culebra 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 (85%), Atlas Air (83%) or Spirit Airlines (82%) 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 $78. On average you can expect to pay $544. The most popular route, (Miami - San Juan Luis Munoz Marin Intl), can usually be booked for $113.

  • 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

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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 July 3, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$48Average$155FlexibilityNo cancel feeOn-time62%
Spirit AirlinesCheapest$60Average$166FlexibilityNo cancel feeOn-time65%
JetBlueCheapest$83Average$254FlexibilityNo cancel feeOn-time62%
SouthwestCheapest$178Average$304FlexibilityNo cancel feeOn-time63%
American AirlinesCheapest$202Average$405FlexibilityNo cancel feeOn-time71%
DeltaCheapest$302Average$302FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$325Average$570FlexibilityNo cancel feeOn-time69%

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