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Luis Munoz Marin Intl

$80+ Cheap flights from Key Largo, FL to Luis Munoz Marin Intl (SJU)

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 11/10. Fares are subject to change and may not be available on all flights or dates of travel.
MIA — SJU
nov. 29 — dic. 61
sáb. 11/29
sáb. 12/6
1 adult, Economy
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Cheapflights Tip: The best prices from Key Largo to San Juan Luis Munoz Marin Intl are usually found in February or January, booked 51 days in advance, depart on a Monday or Tuesday and return on a Friday

Find flight deals from Key Largo to Luis Munoz Marin Intl

Cheapest flights from Key Largo to Luis Munoz Marin Intl
Explore the most affordable flight options available from Key Largo to Luis Munoz Marin Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on octubre 30, 2025.

This Frontier deal was found by Cheapflights users on 10/28. 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.
lun. 11/246:00 amMIA - SJU
Nonstop2h 40mFrontier
jue. 11/279:30 pmSJU - MIA
Nonstop2h 55mFrontier
Deal found 10/28$151
This Priceline deal was found by Cheapflights users on 10/28. 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.
vie. 11/79:45 pmMIA - SJU
Nonstop2h 47mFrontier
dom. 11/99:45 amSJU - MIA
Nonstop2h 47mFrontier
Deal found 10/28$152
This Kiwi.com deal was found by Cheapflights users on 10/29. 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.
vie. 12/124:10 pmMIA - SJU
Nonstop2h 40mMultiple Airlines
jue. 12/183:54 amSJU - MIA
Nonstop3h 06mMultiple Airlines
Deal found 10/29$153
This Frontier deal was found by Cheapflights users on 10/28. 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.
lun. 11/1712:27 pmMIA - SJU
Nonstop2h 43mFrontier
vie. 11/289:30 pmSJU - MIA
Nonstop2h 55mFrontier
Deal found 10/28$154
This Frontier deal was found by Cheapflights users on 10/28. 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.
vie. 11/149:45 pmMIA - SJU
Nonstop2h 47mFrontier
jue. 11/279:30 pmSJU - MIA
Nonstop2h 55mFrontier
Deal found 10/28$156
This Frontier deal was found by Cheapflights users on 10/28. 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.
lun. 11/1712:27 pmMIA - SJU
Nonstop2h 43mFrontier
dom. 11/239:30 pmSJU - MIA
Nonstop2h 55mFrontier
Deal found 10/28$157
This Kiwi.com deal was found by Cheapflights users on 10/28. 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.
lun. 11/246:00 amMIA - SJU
Nonstop2h 40mMultiple Airlines
mar. 12/28:00 amSJU - MIA
Nonstop2h 50mMultiple Airlines
Deal found 10/28$158
This Priceline deal was found by Cheapflights users on 10/29. 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.
vie. 10/311:27 pmMIA - SJU
Nonstop2h 43mFrontier
jue. 11/66:54 pmSJU - MIA
Nonstop2h 51mFrontier
Deal found 10/29$159
This CheapOair deal was found by Cheapflights users on 10/29. 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.
vie. 10/311:27 pmMIA - SJU
Nonstop2h 43mFrontier
dom. 11/29:45 amSJU - MIA
Nonstop2h 47mFrontier
Deal found 10/29$160
This Kiwi.com deal was found by Cheapflights users on 10/29. 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.
jue. 10/3010:45 pmMIA - SJU
Nonstop2h 47mFrontier
dom. 11/29:45 amSJU - MIA
Nonstop2h 47mFrontier
Deal found 10/29$161
This Frontier deal was found by Cheapflights users on 10/28. 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.
dom. 11/25:05 amMIA - SJU
Nonstop2h 40mFrontier
vie. 11/149:30 amSJU - MIA
Nonstop2h 47mFrontier
Deal found 10/28$163

Cheap flight deals from Key Largo to Luis Munoz Marin Intl

Keep the following information in mind while searching for Key Largo to Luis Munoz Marin Intl flight deals. Data was last updated octubre 30, 2025.

Round-trip from

$151
(Frontier)

One-way from

$80
(Kiwi.com)

Popular in

September

Cheapest in

February

Average price

$205
From Key Largo to San Juan Luis Munoz Marin Intl
Search Deals
One-way flight from Key Largo to San Juan Luis Munoz Marin Intl
Search Deals
Highest demand for flights based on searches. 14% potential increase in price ($39 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($7 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in October 2025
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Key Largo to Luis Munoz Marin Intl 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 octubre 30, 2025.
Use the filters below to find and compare flights from Key Largo to San Juan Luis Munoz Marin Intl Airport that are best for you.

Fly from

Key Largo

Fly to

Luis Munoz Marin Intl

Route

Depart

Return

Price

MiamiSan Juan

MIA - SJU

MIASJU

Miami

lun. 1/26

6:55 am-2:55 pm

1 stop7h 00m

San Juan Luis Munoz Marin Intl

jue. 1/29

5:40 am-4:10 pm

2 stops11h 30m

$234

MiamiSan Juan

MIA - SJU

MIASJU

Miami

sáb. 11/15

6:20 am-5:25 pm

1 stop10h 05m

San Juan Luis Munoz Marin Intl

mié. 11/19

3:55 pm-9:50 pm

1 stop6h 55m

$234

MiamiSan Juan

MIA - SJU

MIASJU

Miami

lun. 1/26

5:20 pm-12:35 am

1 stop6h 15m

San Juan Luis Munoz Marin Intl

vie. 1/30

5:40 am-4:10 pm

2 stops11h 30m

$234

MiamiSan Juan

MIA - SJU

MIASJU

Miami

mar. 11/11

1:30 pm-11:20 pm

1 stop8h 50m

San Juan Luis Munoz Marin Intl

jue. 11/13

11:55 am-10:05 pm

1 stop11h 10m

$234

MiamiSan Juan

MIA - SJU

MIASJU

Miami

sáb. 11/15

6:00 am-2:17 pm

1 stop7h 17m

San Juan Luis Munoz Marin Intl

mié. 11/19

1:57 pm-12:46 am

1 stop11h 49m

$237

MiamiSan Juan

MIA - SJU

MIASJU

Miami

lun. 11/17

5:15 pm-12:35 am

1 stop6h 20m

San Juan Luis Munoz Marin Intl

mar. 11/18

5:45 am-12:05 pm

1 stop7h 20m

$254

MiamiSan Juan

MIA - SJU

MIASJU

Miami

vie. 11/7

6:55 am-7:50 pm

1 stop11h 55m

San Juan Luis Munoz Marin Intl

mar. 11/11

8:55 am-7:50 pm

2 stops11h 55m

$259

MiamiSan Juan

MIA - SJU

MIASJU

Miami

mar. 11/18

12:40 pm-12:35 am

2 stops10h 55m

San Juan Luis Munoz Marin Intl

mar. 11/25

3:25 pm-11:00 pm

1 stop8h 35m

$259

MiamiSan Juan

MIA - SJU

MIASJU

Miami

mar. 11/4

6:55 am-6:35 pm

1 stop10h 40m

San Juan Luis Munoz Marin Intl

jue. 11/6

7:40 am-11:50 am

1 stop5h 10m

$259

MiamiSan Juan

MIA - SJU

MIASJU

Miami

mar. 12/2

1:30 pm-12:35 am

2 stops10h 05m

San Juan Luis Munoz Marin Intl

mar. 12/9

6:40 am-4:10 pm

1 stop10h 30m

$281

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/29

Showing 1-10 of 20 results
1
2

Best time to book a flight from Key Largo to Luis Munoz Marin Intl

Have a flexible travel schedule? Discover the best time to fly to Luis Munoz Marin Intl 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 San Juan Luis Munoz Marin Intl Airport

How far ahead should I book a flight from Key Largo to San Juan Luis Munoz Marin Intl Airport?

Use this chart to determine the optimal time to book a round-trip flight from Key Largo to Luis Munoz Marin Intl. Price data was last updated on October 24, 2025.

Booking 51 days in advance of your planned departure date is, on average, the best time to get cheap flights from Key Largo to San Juan Luis Munoz Marin Intl Airport. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

What is the cheapest month to book a flight from Key Largo to San Juan Luis Munoz Marin Intl Airport?

Currently, February is the cheapest month in which you can book a flight from Key Largo to San Juan Luis Munoz Marin Intl Airport (average of $59). Flying from Key Largo to San Juan Luis Munoz Marin Intl Airport in September is currently the most expensive (average of $130). 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 SJU?

Find hourly flight availability from Key Largo to Luis Munoz Marin Intl. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated octubre 30, 2025.

It’s typically best to fly out from Key Largo to San Juan Luis Munoz Marin Intl Airport in the evening. Doing so could potentially save you 28% on the flight price compared to flying in the afternoon, which is usually more expensive.

What is the cheapest day to fly from Key Largo to San Juan Luis Munoz Marin Intl Airport?

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

Travelers seeking maximum savings on their Key Largo to San Juan Luis Munoz Marin Intl Airport flight should consider departing on Wednesday mornings when fares are most often at their lowest. Sunday mornings flights should be avoided if possible as fares are typically the most expensive at this time.

How much does it cost to fly round-trip from Key Largo to San Juan Luis Munoz Marin Intl Airport?

Reviews of airlines servicing Luis Munoz Marin Intl

Get insights into the airlines that provide service to Luis Munoz Marin Intl. 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 Luis Munoz Marin Intl. Reviews last updated octubre 30, 2025.
Read reviews from past customers who have flown Delta, American Airlines, and JetBlue from Key Largo to San Juan Luis Munoz Marin Intl Airport. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
7.9
Good
7,998 reviews

Overall

7.9

Boarding

8.2

Food

7.3

Crew

8.5

Entertainment

7.9

Comfort

7.9

Reviews

1 / 20
6.0
Good

pilar,May 2025

RSW - ATL

The stewardess was not very nice because I requested two glasses of water. She didn’t even offer the snacks to me. She seemed angry and I felt very bad about her reaction. Also, the flight was full and you could not move. The airline should provide seats for obese people in consideration to the rest pf the passengers.
Delta
7.9
Good
7,998 reviews
Delta
7.9
Good
7,998 reviews

Overall

7.9

Boarding

8.2

Food

7.3

Crew

8.5

Entertainment

7.9

Comfort

7.9

Reviews

1 / 20
6.0
Good

pilar,May 2025

RSW - ATL

The stewardess was not very nice because I requested two glasses of water. She didn’t even offer the snacks to me. She seemed angry and I felt very bad about her reaction. Also, the flight was full and you could not move. The airline should provide seats for obese people in consideration to the rest pf the passengers.
American Airlines
7.2
Good
11,035 reviews
Delta
7.9
Good
7,998 reviews

Overall

7.9

Boarding

8.2

Food

7.3

Crew

8.5

Entertainment

7.9

Comfort

7.9

Reviews

1 / 20
6.0
Good

pilar,May 2025

RSW - ATL

The stewardess was not very nice because I requested two glasses of water. She didn’t even offer the snacks to me. She seemed angry and I felt very bad about her reaction. Also, the flight was full and you could not move. The airline should provide seats for obese people in consideration to the rest pf the passengers.
JetBlue
7.2
Good
2,906 reviews
Delta
7.9
Good
7,998 reviews

Overall

7.9

Boarding

8.2

Food

7.3

Crew

8.5

Entertainment

7.9

Comfort

7.9

Reviews

1 / 20
6.0
Good

pilar,May 2025

RSW - ATL

The stewardess was not very nice because I requested two glasses of water. She didn’t even offer the snacks to me. She seemed angry and I felt very bad about her reaction. Also, the flight was full and you could not move. The airline should provide seats for obese people in consideration to the rest pf the passengers.
Spirit Airlines
6.3
Okay
8,116 reviews
Delta
7.9
Good
7,998 reviews

Overall

7.9

Boarding

8.2

Food

7.3

Crew

8.5

Entertainment

7.9

Comfort

7.9

Reviews

1 / 20
6.0
Good

pilar,May 2025

RSW - ATL

The stewardess was not very nice because I requested two glasses of water. She didn’t even offer the snacks to me. She seemed angry and I felt very bad about her reaction. Also, the flight was full and you could not move. The airline should provide seats for obese people in consideration to the rest pf the passengers.
Frontier
5.8
Fair
3,122 reviews
Delta
7.9
Good
7,998 reviews

Overall

7.9

Boarding

8.2

Food

7.3

Crew

8.5

Entertainment

7.9

Comfort

7.9

Reviews

1 / 20
6.0
Good

pilar,May 2025

RSW - ATL

The stewardess was not very nice because I requested two glasses of water. She didn’t even offer the snacks to me. She seemed angry and I felt very bad about her reaction. Also, the flight was full and you could not move. The airline should provide seats for obese people in consideration to the rest pf the passengers.

Related info for your journey

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

  • How long is the flight from Key Largo to San Juan Luis Munoz Marin Intl Airport?

    Southwest and Delta can get you from Key Largo to San Juan Luis Munoz Marin Intl Airport in just under 7h. Your travel time can differ by up to 17m. The distance from Key Largo to San Juan Luis Munoz Marin Intl Airport is about 1044 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • What are the most reliable airlines from Key Largo to San Juan Luis Munoz Marin Intl Airport?

    Before booking your flight to San Juan Luis Munoz Marin Intl Airport from Key Largo, check out the most reliable airlines to get you to your destination on time: Spirit Airlines (92%), Frontier (80%), British Airways( 75%).

  • What are the cheapest flights from Key Largo to San Juan Luis Munoz Marin Intl Airport?

    Looking at all options, your cheapest flight can be booked for $86. While the most popular route (Miami - San Juan Luis Munoz Marin Intl) can be booked for $119 on average, our data indicates $415 when flying from Key Largo to San Juan Luis Munoz Marin Intl Airport.

  • Can I find deals for flights from Key Largo to Luis Munoz Marin Intl that include hotel bookings?

    Yes. In addition to deals on Key Largo to Luis Munoz Marin Intl flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Key Largo to Luis Munoz Marin Intl?

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

  • Can I find deals for business class flights from Key Largo to Luis Munoz Marin Intl?

    Yes. Cheapflights offers flight deals from Key Largo to Luis Munoz Marin Intl 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 San Juan Luis Munoz Marin Intl Airport?

    Currently, February is the cheapest month in which you can book a flight from Key Largo to San Juan Luis Munoz Marin Intl Airport (average of $59). Flying from Key Largo to San Juan Luis Munoz Marin Intl Airport in September is currently the most expensive (average of $130). 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

Traveling to a place near San Juan Luis Munoz Marin Intl Airport?

Book flights to San Juan Luis Munoz Marin Intl Airport if you plan to visit one of these locations
Dorado
Fajardo
Rio Grande
Luquillo
Humacao

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Alternative routes for Key Largo to Luis Munoz Marin Intl

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 Luis Munoz Marin Intl

Discover the top 6 airlines that operate flights from Key Largo to Luis Munoz Marin Intl. 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 octubre 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$60Average$166FlexibilityNo cancel feeOn-time62%
Spirit AirlinesCheapest$72Average$189FlexibilityNo cancel feeOn-time65%
DeltaCheapest$108Average$358FlexibilityNo cancel feeOn-timeN/A
JetBlueCheapest$128Average$251FlexibilityNo cancel feeOn-time62%
SouthwestCheapest$180Average$307FlexibilityNo cancel feeOn-time63%
American AirlinesCheapest$212Average$418FlexibilityNo cancel feeOn-time71%

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