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$87+ 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 1/8. Fares are subject to change and may not be available on all flights or dates of travel.
MIA — SJO
Jan 17 — Jan 241
Sat 1/17
Sat 1/24
1 adult, Economy
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Cheap 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 December 18, 2025.

This Avianca deal was found by Cheapflights users on 12/15. 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.
Thu 12/251:25 pmMIA - SJO
Nonstop3h 05mAvianca
Tue 12/307:45 amSJO - MIA
Nonstop3h 05mAvianca
Deal found 12/15$234
This Avianca deal was found by Cheapflights users on 12/17. 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.
Sun 12/282:40 pmMIA - SJO
1 stop5h 15mAvianca
Sun 1/117:45 amSJO - MIA
Nonstop3h 05mAvianca
Deal found 12/17$235
This Super.com deal was found by Cheapflights users on 12/16. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/251:25 pmMIA - SJO
Nonstop3h 05mAvianca
Wed 12/317:45 amSJO - MIA
Nonstop3h 05mAvianca
Deal found 12/16$238
This United Airlines deal was found by Cheapflights users on 12/16. 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 12/186:20 amMIA - SJO
1 stop7h 55mUnited Airlines
Mon 12/2212:35 pmSJO - MIA
1 stop21h 19mUnited Airlines
Deal found 12/16$242
This Avianca deal was found by Cheapflights users on 12/16. 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.
Thu 12/251:25 pmMIA - SJO
Nonstop3h 05mAvianca
Tue 1/137:45 amSJO - MIA
Nonstop3h 05mAvianca
Deal found 12/16$249
This Avianca deal was found by Cheapflights users on 12/17. 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.
Mon 12/292:40 pmMIA - SJO
1 stop5h 15mAvianca
Sun 1/117:45 amSJO - MIA
Nonstop3h 05mAvianca
Deal found 12/17$254
This Kiwi.com deal was found by Cheapflights users on 12/17. 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.
Sun 12/281:25 pmMIA - SJO
Nonstop3h 05mAvianca
Tue 12/307:45 amSJO - MIA
Nonstop3h 05mAvianca
Deal found 12/17$261
This Kiwi.com deal was found by Cheapflights users on 12/17. 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.
Thu 12/251:25 pmMIA - SJO
Nonstop3h 05mAvianca
Mon 12/297:45 amSJO - MIA
Nonstop3h 05mAvianca
Deal found 12/17$262
This Kiwi.com deal was found by Cheapflights users on 12/16. 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.
Thu 12/251:25 pmMIA - SJO
Nonstop3h 05mAvianca
Sun 12/287:45 amSJO - MIA
Nonstop3h 05mAvianca
Deal found 12/16$266
This American Airlines deal was found by Cheapflights users on 12/17. 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.
Tue 12/3012:00 pmMIA - LIR
Nonstop3h 13mAmerican Airlines
Wed 12/313:13 pmLIR - MIA
Nonstop3h 03mAmerican Airlines
Deal found 12/17$418
This Delta deal was found by Cheapflights users on 12/16. 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 12/176:00 amMIA - LIR
1 stop7h 40mDelta
Wed 12/242:05 pmLIR - MIA
1 stop9h 26mDelta
Deal found 12/16$433
This American Airlines deal was found by Cheapflights users on 12/16. 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.
Wed 12/1710:15 amMIA - LIR
Nonstop3h 10mAmerican Airlines
Wed 12/243:13 pmLIR - MIA
Nonstop3h 03mAmerican Airlines
Deal found 12/16$458

Find 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 December 18, 2025.

Most accurate provider

CheapOair
3 stars

Most trusted provider

CheapOair
3 stars

Round-trip from

$191
(CheapOair)

One-way from

$87
(Super.com)

Popular in

December

Cheapest in

August

Average price

$483
Provider with most accurate pricing for Miami-San José Juan Santamaria Intl flight deals.
Search Deals
Provider most trusted by Cheapflights users for Miami-San José Juan Santamaria Intl flights.
Search Deals
From Key Largo to Costa Rica
Search Deals
One-way flight from Key Largo to Costa Rica
Search Deals
Highest demand for flights based on searches. 17% potential increase in price ($64 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease ($16 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
Search Deals

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 December 18, 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 2/23

1:24 pm-3:17 pm

Nonstop2h 53m

San José Juan Santamaria Intl

Mon 3/2

5:00 am-3:20 pm

2 stops9h 20m

$201

MiamiSan José

MIA - SJO

MIASJO

Miami

Fri 1/16

1:25 pm-3:30 pm

Nonstop3h 05m

San José Juan Santamaria Intl

Mon 1/19

7:45 am-11:50 am

Nonstop3h 05m

$202

MiamiSan José

MIA - SJO

MIASJO

Miami

Fri 2/6

1:25 pm-3:30 pm

Nonstop3h 05m

San José Juan Santamaria Intl

Sun 2/8

7:45 am-11:50 am

Nonstop3h 05m

$202

MiamiSan José

MIA - SJO

MIASJO

Miami

Thu 1/15

7:05 am-1:40 pm

1 stop7h 35m

San José Juan Santamaria Intl

Thu 5/28

8:50 am-1:40 pm

Nonstop2h 50m

$203

MiamiSan José

MIA - SJO

MIASJO

Miami

Fri 1/30

1:25 pm-3:30 pm

Nonstop3h 05m

San José Juan Santamaria Intl

Mon 2/2

3:05 pm-9:15 pm

1 stop5h 10m

$203

MiamiSan José

MIA - SJO

MIASJO

Miami

Wed 1/14

1:25 pm-3:30 pm

Nonstop3h 05m

San José Juan Santamaria Intl

Wed 1/21

3:05 pm-9:15 pm

1 stop5h 10m

$204

MiamiSan José

MIA - SJO

MIASJO

Miami

Fri 2/6

2:40 pm-6:55 pm

1 stop5h 15m

San José Juan Santamaria Intl

Mon 2/9

5:00 am-3:20 pm

2 stops9h 20m

$205

MiamiSan José

MIA - SJO

MIASJO

Miami

Fri 3/6

4:50 pm-11:40 pm

2 stops7h 50m

San José Juan Santamaria Intl

Wed 3/18

5:00 am-12:15 pm

1 stop5h 15m

$205

MiamiSan José

MIA - SJO

MIASJO

Miami

Wed 4/29

9:40 pm-10:40 pm

Nonstop3h 00m

San José Juan Santamaria Intl

Sun 5/3

8:50 am-1:40 pm

Nonstop2h 50m

$233

MiamiLiberia

MIA - LIR

MIALIR

Miami

Tue 1/13

12:07 pm-2:14 pm

Nonstop3h 07m

Liberia

Thu 1/22

3:13 pm-7:19 pm

Nonstop3h 06m

$418

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/17

Showing 1-10 of 41 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, January is the cheapest month in which you can book a flight from Key Largo to Costa Rica (average of $92). Flying from Key Largo to Costa Rica in February is currently the most expensive (average of $145). 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 December 18, 2025.

It’s typically best to fly out from Key Largo to Costa Rica in the evening. Doing so could potentially save you 19% on the flight price compared to flying at noon, 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 December 16, 2024.

Travelers seeking maximum savings on their Key Largo to Costa Rica flight should consider departing on Wednesday mornings 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 December 18, 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
1,556 reviews

Crew

8.1

Food

6.8

Overall

7.6

Comfort

7.4

Boarding

7.8

Entertainment

6.8

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
1,556 reviews
Copa Airlines
7.6
Good
1,556 reviews

Crew

8.1

Food

6.8

Overall

7.6

Comfort

7.4

Boarding

7.8

Entertainment

6.8

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
1,556 reviews

Crew

8.1

Food

6.8

Overall

7.6

Comfort

7.4

Boarding

7.8

Entertainment

6.8

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
11,055 reviews
Copa Airlines
7.6
Good
1,556 reviews

Crew

8.1

Food

6.8

Overall

7.6

Comfort

7.4

Boarding

7.8

Entertainment

6.8

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
2,490 reviews
Copa Airlines
7.6
Good
1,556 reviews

Crew

8.1

Food

6.8

Overall

7.6

Comfort

7.4

Boarding

7.8

Entertainment

6.8

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
8,190 reviews
Copa Airlines
7.6
Good
1,556 reviews

Crew

8.1

Food

6.8

Overall

7.6

Comfort

7.4

Boarding

7.8

Entertainment

6.8

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 17 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?

    Avianca and American Airlines can get you from Key Largo to Costa Rica in just under 3h 05m. Your travel time will be generally consistent. Airlines will cover a distance of 1121 mi. All flights are typically nonstop.

  • 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 $41 on Volaris Costa Rica. Other airlines that offer cheap prices include Spirit Airlines from $74 and JetBlue from $79 one-way.

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

    Consider Aserca Airlines (100%), Avianca (99%) or Avianca Costa Rica (99%) 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 $665, our data shows the cheapest flight currently is $43. 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, January is the cheapest month in which you can book a flight from Key Largo to Costa Rica (average of $92). Flying from Key Largo to Costa Rica in February is currently the most expensive (average of $145). 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 December 18, 2025.
AirlineCheapestAverageFlexibilityOn-time
AviancaCheapest$119Average$249FlexibilityNo cancel feeOn-time71%
Copa AirlinesCheapest$125Average$285FlexibilityNo cancel feeOn-time70%
Volaris Costa RicaCheapest$132Average$159FlexibilityNo cancel feeOn-timeN/A
Spirit AirlinesCheapest$152Average$240FlexibilityNo cancel feeOn-time65%
JetBlueCheapest$178Average$343FlexibilityNo cancel feeOn-time62%
Volaris El SalvadorCheapest$196Average$233FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$227Average$481FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$288Average$654FlexibilityNo cancel feeOn-time69%
DeltaCheapest$352Average$587FlexibilityNo cancel feeOn-timeN/A

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