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$91+ 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 11/24. Fares are subject to change and may not be available on all flights or dates of travel.
MIA — SJO
Oct 14 — Oct 211
Tue 10/14
Tue 10/21
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 September 14, 2025.

Round-trip from

$192
(Expedia)

One-way from

$91
(CheapOair)

Popular in

December

Cheapest in

August

Average price

$275
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. 23% potential increase in price ($104 potential increase over avg. RT price).
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Cheapest flight prices on average. 6% potential price decrease ($22 potential savings vs. average RT price).
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Average for round-trip flights in September 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 September 14, 2025.

This Expedia deal was found by Cheapflights users on 9/13. 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.
Sat 9/272:28 pmMIA - SJO
Nonstop2h 49mMultiple Airlines
Mon 9/298:14 amSJO - MIA
Nonstop2h 43mMultiple Airlines
Deal found 9/13$192
This Booking.com deal was found by Cheapflights users on 9/14. 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.
Sat 9/272:28 pmMIA - SJO
Nonstop2h 49mMultiple Airlines
Mon 10/135:25 pmSJO - MIA
1 stop4h 30mMultiple Airlines
Deal found 9/14$193
This Avianca deal was found by Cheapflights users on 9/13. 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 10/169:40 pmMIA - SJO
Nonstop3h 00mAvianca
Thu 10/235:25 pmSJO - MIA
1 stop4h 30mAvianca
Deal found 9/13$201
This Avianca deal was found by Cheapflights users on 9/14. 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 10/35:35 amMIA - SJO
1 stop4h 15mAvianca
Sun 10/55:25 pmSJO - MIA
1 stop4h 30mAvianca
Deal found 9/14$202
This Avianca deal was found by Cheapflights users on 9/14. 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 10/13:10 pmMIA - SJO
1 stop5h 35mAvianca
Fri 10/105:05 amSJO - MIA
2 stops6h 50mAvianca
Deal found 9/14$204
This Avianca deal was found by Cheapflights users on 9/13. 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.
Sat 9/275:45 pmMIA - SJO
2 stops7h 50mAvianca
Mon 9/295:05 amSJO - MIA
2 stops6h 50mAvianca
Deal found 9/13$205
This Kiwi.com deal was found by Cheapflights users on 9/14. 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.
Fri 10/245:35 amMIA - SJO
1 stop4h 15mAvianca
Fri 10/319:00 amSJO - MIA
Nonstop3h 05mAvianca
Deal found 9/14$207
This CheapOair deal was found by Cheapflights users on 9/13. 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.
Fri 12/51:24 pmMIA - SJO
Nonstop2h 53mVolaris El Salvador
Sun 12/78:10 amSJO - MIA
Nonstop2h 42mVolaris El Salvador
Deal found 9/13$208
This Avianca deal was found by Cheapflights users on 9/13. 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 10/95:35 amMIA - SJO
1 stop4h 15mAvianca
Sun 10/198:50 amSJO - MIA
Nonstop2h 50mAvianca
Deal found 9/13$211
This Gotogate deal was found by Cheapflights users on 9/13. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/112:25 pmMIA - SJO
2 stops10h 15mAvianca
Tue 12/169:00 amSJO - MIA
Nonstop3h 05mAvianca
Deal found 9/13$212
This American Airlines deal was found by Cheapflights users on 9/13. 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 10/3110:45 amMIA - LIR
Nonstop3h 00mAmerican Airlines
Mon 11/31:21 pmLIR - MIA
Nonstop3h 04mAmerican Airlines
Deal found 9/13$343
This American Airlines deal was found by Cheapflights users on 9/14. 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.
Thu 10/1610:45 amMIA - LIR
Nonstop3h 00mAmerican Airlines
Thu 10/2312:45 pmLIR - MIA
Nonstop2h 50mAmerican Airlines
Deal found 9/14$352

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 September 14, 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

Fri 10/24

5:35 am-7:50 am

1 stop4h 15m

San José Juan Santamaria Intl

Mon 10/27

9:00 am-2:05 pm

Nonstop3h 05m

$201

MiamiSan José

MIA - SJO

MIASJO

Miami

Thu 3/5

10:45 pm-12:50 am

Nonstop3h 05m

San José Juan Santamaria Intl

Wed 3/11

9:00 am-2:05 pm

Nonstop3h 05m

$202

MiamiSan José

MIA - SJO

MIASJO

Miami

Fri 10/3

5:35 am-7:50 am

1 stop4h 15m

San José Juan Santamaria Intl

Sun 10/5

8:50 am-1:40 pm

Nonstop2h 50m

$202

MiamiSan José

MIA - SJO

MIASJO

Miami

Tue 11/11

10:45 pm-12:50 am

Nonstop3h 05m

San José Juan Santamaria Intl

Wed 11/19

9:00 am-1:05 pm

Nonstop3h 05m

$202

MiamiSan José

MIA - SJO

MIASJO

Miami

Sat 9/27

3:10 pm-6:45 pm

1 stop5h 35m

San José Juan Santamaria Intl

Mon 9/29

5:25 pm-11:55 pm

1 stop4h 30m

$203

MiamiSan José

MIA - SJO

MIASJO

Miami

Mon 10/6

5:45 pm-11:35 pm

2 stops7h 50m

San José Juan Santamaria Intl

Tue 10/21

5:05 am-12:15 pm

1 stop5h 10m

$205

MiamiSan José

MIA - SJO

MIASJO

Miami

Thu 1/15

10:45 pm-12:50 am

Nonstop3h 05m

San José Juan Santamaria Intl

Mon 1/19

8:10 am-11:52 am

Nonstop2h 42m

$217

MiamiSan José

MIA - SJO

MIASJO

Miami

Sat 11/15

5:24 am-9:59 am

1 stop5h 35m

San José Juan Santamaria Intl

Wed 11/19

10:08 am-9:45 pm

1 stop10h 37m

$218

MiamiSan José

MIA - SJO

MIASJO

Miami

Wed 9/24

6:09 am-9:58 am

1 stop5h 49m

San José Juan Santamaria Intl

Tue 9/30

8:11 am-4:59 pm

1 stop6h 48m

$218

MiamiLiberia

MIA - LIR

MIALIR

Miami

Sun 10/26

6:00 am-12:00 pm

1 stop8h 00m

Liberia

Thu 10/30

1:05 pm-12:29 am

1 stop9h 24m

$375

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/14

Showing 1-10 of 39 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, September is the cheapest month in which you can book a flight from Key Largo to Costa Rica (average of $398). Flying from Key Largo to Costa Rica in March is currently the most expensive (average of $555). 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 September 14, 2025.

When flying from Key Largo to Costa Rica, 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 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 Saturday at noon when fares are most often at their lowest. Saturday mornings flights should be avoided if possible as fares are typically the most expensive at this time.

Weekly flight availability from Key Largo to Costa Rica

Explore weekly flight availability from Key Largo to Costa Rica. 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 September 14, 2025.

The most flights from KE9 to CR0 are scheduled on a Monday (7 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (6 on average).

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 September 14, 2025.
Read reviews from past customers who have flown Copa Airlines, American Airlines, and Avianca 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
1,531 reviews

Overall

7.6

Crew

8.1

Entertainment

6.8

Comfort

7.4

Food

6.8

Boarding

7.8

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
1,531 reviews
Copa Airlines
7.6
Good
1,531 reviews

Overall

7.6

Crew

8.1

Entertainment

6.8

Comfort

7.4

Food

6.8

Boarding

7.8

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
10,000 reviews
Copa Airlines
7.6
Good
1,531 reviews

Overall

7.6

Crew

8.1

Entertainment

6.8

Comfort

7.4

Food

6.8

Boarding

7.8

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
6.7
Okay
2,435 reviews
Copa Airlines
7.6
Good
1,531 reviews

Overall

7.6

Crew

8.1

Entertainment

6.8

Comfort

7.4

Food

6.8

Boarding

7.8

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
8,016 reviews
Copa Airlines
7.6
Good
1,531 reviews

Overall

7.6

Crew

8.1

Entertainment

6.8

Comfort

7.4

Food

6.8

Boarding

7.8

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 10 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, Delta, and United Airlines can get you from Key Largo to Costa Rica in just under 4h 15m. Your travel time can differ by up to 3h 45m. Airlines will cover a distance of 1121 mi. This flight may include one or multiple stops.

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

    Consider Volaris El Salvador (95%), Avianca (85%) or Avianca Costa Rica (85%) 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 $175, our data shows the cheapest flight currently is $39. When looking at the most popular route, (Miami - San José Juan Santamaria Intl), you can expect to pay $155 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, September is the cheapest month in which you can book a flight from Key Largo to Costa Rica (average of $398). Flying from Key Largo to Costa Rica in March is currently the most expensive (average of $555). 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 September 14, 2025.
AirlineCheapestAverageFlexibilityOn-time
Volaris Costa RicaCheapest$124Average$137FlexibilityNo cancel feeOn-timeN/A
AviancaCheapest$126Average$249FlexibilityNo cancel feeOn-time71%
Spirit AirlinesCheapest$157Average$259FlexibilityNo cancel feeOn-time65%
Copa AirlinesCheapest$161Average$305FlexibilityNo cancel feeOn-time70%
JetBlueCheapest$175Average$349FlexibilityNo cancel feeOn-time62%
Volaris El SalvadorCheapest$200Average$228FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$234Average$553FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$404Average$656FlexibilityNo cancel feeOn-time69%
DeltaCheapest$493Average$622FlexibilityNo cancel feeOn-timeN/A

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