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$74+ Cheap flights from Key Largo, FL to Costa Rica

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 11/8. Fares are subject to change and may not be available on all flights or dates of travel.
MIA — SJO
Nov 29 — Dec 61
Sat 11/29
Sat 12/6
1 adult, Economy
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Cheap flight deals from Key Largo to Costa Rica

Keep the following information in mind while searching for Key Largo to Costa Rica flight deals. Data was last updated October 30, 2025.

Most accurate provider

CheapOair
3 stars

Most trusted provider

CheapOair
3 stars

Round-trip from

$189
(CheapOair)

One-way from

$74
(Flightnetwork)

Popular in

December

Cheapest in

August

Average price

$271
Provider with most accurate pricing for Miami-San José Juan Santamaria Intl flight deals.
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Provider most trusted by Cheapflights users for Miami-San José Juan Santamaria Intl flights.
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From Key Largo to Costa Rica
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One-way flight from Key Largo to Costa Rica
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Highest demand for flights based on searches. 22% potential increase in price ($96 potential increase over avg. RT price).
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Cheapest flight prices on average. 6% potential price decrease ($20 potential savings vs. average RT price).
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Average for round-trip flights in October 2025
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Find flight deals from Key Largo to Costa Rica

Cheapest flights from Key Largo to Costa Rica
Explore the most affordable flight options available from Key Largo to Costa Rica. Find the lowest fares from popular airlines and budget airlines, with prices last updated on October 30, 2025.

This Mytrip deal was found by Cheapflights users on 10/30. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/81:33 pmMIA - SJO
Nonstop2h 53mMultiple Airlines
Mon 11/107:58 amSJO - MIA
Nonstop2h 54mMultiple Airlines
Deal found 10/30$189
This eDestinos deal was found by Cheapflights users on 10/30. 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 eDestinos is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/81:33 pmMIA - SJO
Nonstop2h 53mMultiple Airlines
Sun 11/97:58 amSJO - MIA
Nonstop2h 54mMultiple Airlines
Deal found 10/30$190
This Mytrip 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/71:24 pmMIA - SJO
Nonstop2h 53mVolaris El Salvador
Fri 11/147:58 amSJO - MIA
Nonstop2h 54mVolaris El Salvador
Deal found 10/29$191
This Trip.com deal was found by Cheapflights users on 10/30. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/141:24 pmMIA - SJO
Nonstop2h 53mVolaris El Salvador
Mon 11/177:58 amSJO - MIA
Nonstop2h 54mVolaris El Salvador
Deal found 10/30$194
This Trip.com deal was found by Cheapflights users on 10/30. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/281:24 pmMIA - SJO
Nonstop2h 53mVolaris El Salvador
Sun 12/77:58 amSJO - MIA
Nonstop2h 54mVolaris El Salvador
Deal found 10/30$199
This Booking.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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/51:24 pmMIA - SJO
Nonstop2h 53mVolaris El Salvador
Mon 12/87:58 amSJO - MIA
Nonstop2h 54mVolaris El Salvador
Deal found 10/29$200
This Avianca 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 Avianca is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/141:25 pmMIA - SJO
Nonstop3h 05mAvianca
Mon 11/177:45 amSJO - MIA
Nonstop3h 05mAvianca
Deal found 10/29$201
This Expedia deal was found by Cheapflights users on 10/30. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/171:24 pmMIA - SJO
Nonstop2h 53mVolaris El Salvador
Mon 11/247:58 amSJO - MIA
Nonstop2h 54mVolaris El Salvador
Deal found 10/30$202
This Avianca 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 Avianca is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/124:50 pmMIA - SJO
2 stops7h 50mAvianca
Sat 11/155:00 amSJO - MIA
2 stops9h 20mAvianca
Deal found 10/29$205
This Mytrip 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/31:24 pmMIA - SJO
Nonstop2h 53mMultiple Airlines
Thu 11/63:05 pmSJO - MIA
2 stops7h 05mMultiple Airlines
Deal found 10/29$206
This American Airlines deal was found by Cheapflights users on 10/30. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/612:10 pmMIA - LIR
Nonstop3h 10mAmerican Airlines
Wed 12/101:25 pmLIR - MIA
Nonstop2h 55mAmerican Airlines
Deal found 10/30$232
This American Airlines 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/510:15 amMIA - LIR
Nonstop3h 10mAmerican Airlines
Mon 12/81:30 pmLIR - MIA
Nonstop3h 00mAmerican Airlines
Deal found 10/29$233

Cheapflights Fare Finder

 
Customize your flight search to find flights from Key Largo to Costa Rica 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 October 30, 2025.
Use the filters below to find and compare flights from Key Largo to Costa Rica that are best for you.

Fly from

Key Largo

Fly to

Costa Rica

Route

Depart

Return

Price

MiamiSan José

MIA - SJO

MIASJO

Miami

Mon 11/10

4:59 am-9:59 am

1 stop6h 00m

San José Juan Santamaria Intl

Sun 11/16

6:07 pm-12:45 am

1 stop5h 38m

$231

MiamiSan José

MIA - SJO

MIASJO

Miami

Tue 11/18

5:27 pm-9:56 pm

1 stop5h 29m

San José Juan Santamaria Intl

Wed 11/19

10:08 am-9:22 pm

1 stop10h 14m

$231

MiamiSan José

MIA - SJO

MIASJO

Miami

Thu 12/11

5:34 am-9:59 am

1 stop5h 25m

San José Juan Santamaria Intl

Sun 12/14

2:53 pm-9:45 pm

1 stop5h 52m

$233

MiamiSan José

MIA - SJO

MIASJO

Miami

Sat 11/15

5:24 am-1:53 pm

1 stop9h 29m

San José Juan Santamaria Intl

Sat 11/15

4:08 am-3:45 pm

1 stop10h 37m

$234

MiamiSan José

MIA - SJO

MIASJO

Miami

Mon 12/15

5:34 am-1:21 pm

1 stop8h 47m

San José Juan Santamaria Intl

Tue 12/23

10:08 am-9:45 pm

1 stop10h 37m

$238

MiamiSan José

MIA - SJO

MIASJO

Miami

Thu 12/11

4:59 am-9:59 am

1 stop6h 00m

San José Juan Santamaria Intl

Sun 12/14

2:53 pm-9:22 pm

1 stop5h 29m

$238

MiamiSan José

MIA - SJO

MIASJO

Miami

Wed 2/25

5:01 am-1:53 pm

1 stop9h 52m

San José Juan Santamaria Intl

Wed 2/25

6:08 pm-12:37 am

1 stop5h 29m

$238

MiamiSan José

MIA - SJO

MIASJO

Miami

Tue 12/2

4:59 am-6:37 pm

1 stop14h 38m

San José Juan Santamaria Intl

Thu 12/4

4:08 am-1:36 pm

1 stop8h 28m

$238

MiamiLiberia

MIA - LIR

MIALIR

Miami

Sat 12/6

11:55 am-6:37 pm

1 stop7h 42m

Liberia

Wed 12/10

8:35 am-5:53 pm

1 stop8h 18m

$247

MiamiSan José

MIA - SJO

MIASJO

Miami

Sat 12/13

5:34 am-9:59 am

1 stop5h 25m

San José Juan Santamaria Intl

Wed 12/17

4:08 am-11:21 am

1 stop6h 13m

$248

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/30

Showing 1-10 of 43 results
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Best time to book a flight from Key Largo to Costa Rica

Have a flexible travel schedule? Discover the best time to fly to Costa Rica 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 Costa Rica

What is the cheapest month to book a flight from Key Largo to Costa Rica?

Currently, August is the cheapest month in which you can book a flight from Key Largo to Costa Rica (average of $112). Flying from Key Largo to Costa Rica in December is currently the most expensive (average of $180). 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 CR?

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

It’s typically best to fly out from Key Largo to Costa Rica in the afternoon. Doing so could potentially save you 8% on the flight price compared to flying in the morning, which is usually more expensive.

What is the cheapest day to fly from Key Largo to Costa Rica?

Use this chart to determine the cheapest time to fly round-trip from Key Largo to Costa Rica. Price data was last updated on October 20, 2024.

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

Reviews of airlines servicing Costa Rica

Get insights into the airlines that provide service to Costa Rica. 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 Costa Rica. Reviews last updated October 30, 2025.
Read reviews from past customers who have flown Copa Airlines, Volaris El Salvador, and American Airlines from Key Largo to Costa Rica. 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.
Copa Airlines
7.6
Good
1,561 reviews

Overall

7.6

Entertainment

6.8

Boarding

7.8

Food

6.9

Crew

8.1

Comfort

7.4

Reviews

1 / 20
4.0
Okay

Juan Pablo,Sep 2025

PTY - VVI

not a good expirience, the plane was packed, the seats wear very unconftrable, coudent conect with the entratainmente service on the plane, the onboarding was in charge of a very angry lady i really had a unplesent trip
Copa Airlines
7.6
Good
1,561 reviews
Copa Airlines
7.6
Good
1,561 reviews

Overall

7.6

Entertainment

6.8

Boarding

7.8

Food

6.9

Crew

8.1

Comfort

7.4

Reviews

1 / 20
4.0
Okay

Juan Pablo,Sep 2025

PTY - VVI

not a good expirience, the plane was packed, the seats wear very unconftrable, coudent conect with the entratainmente service on the plane, the onboarding was in charge of a very angry lady i really had a unplesent trip
Volaris El Salvador
7.4
Good
Copa Airlines
7.6
Good
1,561 reviews

Overall

7.6

Entertainment

6.8

Boarding

7.8

Food

6.9

Crew

8.1

Comfort

7.4

Reviews

1 / 20
4.0
Okay

Juan Pablo,Sep 2025

PTY - VVI

not a good expirience, the plane was packed, the seats wear very unconftrable, coudent conect with the entratainmente service on the plane, the onboarding was in charge of a very angry lady i really had a unplesent trip
American Airlines
7.2
Good
11,035 reviews
Copa Airlines
7.6
Good
1,561 reviews

Overall

7.6

Entertainment

6.8

Boarding

7.8

Food

6.9

Crew

8.1

Comfort

7.4

Reviews

1 / 20
4.0
Okay

Juan Pablo,Sep 2025

PTY - VVI

not a good expirience, the plane was packed, the seats wear very unconftrable, coudent conect with the entratainmente service on the plane, the onboarding was in charge of a very angry lady i really had a unplesent trip
Avianca
6.6
Okay
2,467 reviews
Copa Airlines
7.6
Good
1,561 reviews

Overall

7.6

Entertainment

6.8

Boarding

7.8

Food

6.9

Crew

8.1

Comfort

7.4

Reviews

1 / 20
4.0
Okay

Juan Pablo,Sep 2025

PTY - VVI

not a good expirience, the plane was packed, the seats wear very unconftrable, coudent conect with the entratainmente service on the plane, the onboarding was in charge of a very angry lady i really had a unplesent trip
Spirit Airlines
6.3
Okay
8,116 reviews
Copa Airlines
7.6
Good
1,561 reviews

Overall

7.6

Entertainment

6.8

Boarding

7.8

Food

6.9

Crew

8.1

Comfort

7.4

Reviews

1 / 20
4.0
Okay

Juan Pablo,Sep 2025

PTY - VVI

not a good expirience, the plane was packed, the seats wear very unconftrable, coudent conect with the entratainmente service on the plane, the onboarding was in charge of a very angry lady i really had a unplesent trip

Related info for your journey

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

  • How popular is this Key Largo to Costa Rica flight route?

    The Key Largo to Costa Rica flight path was viewed by 15 users in the past month. Keep an eye out for changes in search interest prior to high and low season.

  • How long is the flight from Key Largo to Costa Rica?

    Copa Airlines, United Airlines, and Delta can get you from Key Largo to Costa Rica in just under 6h. Your travel time can differ by up to 1h 42m. Airlines will cover a distance of 1121 mi. This flight may include one or multiple stops.

  • What are the cheapest airlines to fly from Key Largo to Costa Rica one-way?

    One-way options have recently been found by users for as low as $102 on United Airlines. Other airlines that offer cheap prices include American Airlines from $104 and Delta from $127 one-way.

  • What are the most reliable airlines from Key Largo to Costa Rica?

    Consider Avianca (88%), Avianca Costa Rica (88%) or Volaris El Salvador (84%) when booking your flight. These represent the most reliable airlines when flying from Key Largo to Costa Rica.

  • What are the cheapest flights from Key Largo to Costa Rica?

    While on average a flight from Key Largo to Costa Rica is generally $548, our data shows the cheapest flight currently is $45. When looking at the most popular route, (Miami - San José Juan Santamaria Intl), you can expect to pay $156 for that flight.

  • Can I find deals for flights from Key Largo to Costa Rica that include hotel bookings?

    Yes. In addition to deals on Key Largo to Costa Rica flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Key Largo to Costa Rica?

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

  • Can I find deals for business class flights from Key Largo to Costa Rica?

    Yes. Cheapflights offers flight deals from Key Largo to Costa Rica 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 Costa Rica?

    Currently, August is the cheapest month in which you can book a flight from Key Largo to Costa Rica (average of $112). Flying from Key Largo to Costa Rica in December is currently the most expensive (average of $180). 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 Costa Rica

See prices for flight routes from nearby airports that may be better suited for you.
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Top 9 airlines flying from Key Largo to Costa Rica

Discover the top 9 airlines that operate flights from Key Largo to Costa Rica. 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 October 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
Volaris Costa RicaCheapest$132Average$159FlexibilityNo cancel feeOn-timeN/A
AviancaCheapest$139Average$249FlexibilityNo cancel feeOn-time71%
Spirit AirlinesCheapest$154Average$253FlexibilityNo cancel feeOn-time65%
Copa AirlinesCheapest$156Average$296FlexibilityNo cancel feeOn-time70%
JetBlueCheapest$178Average$339FlexibilityNo cancel feeOn-time62%
Volaris El SalvadorCheapest$203Average$228FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$230Average$546FlexibilityNo cancel feeOn-time71%
DeltaCheapest$352Average$584FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$443Average$661FlexibilityNo cancel feeOn-time69%

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