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$102+ 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 7/28. Fares are subject to change and may not be available on all flights or dates of travel.
MIA — SJO
Apr 20 — Apr 271
Sun 4/20
Sun 4/27
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 April 15, 2025.

Most accurate provider

AranGrant
3 stars

Most trusted provider

AranGrant
3 stars

Round-trip from

$228
(Mytrip)

One-way from

$102
(eDestinos)

Popular in

December

Cheapest in

October

Average price

$336
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. 16% potential increase in price ($73 potential increase over avg. RT price).
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Cheapest flight prices on average. 5% potential price decrease ($18 potential savings vs. average RT price).
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Average for round-trip flights in April 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 April 15, 2025.

This Booking.com deal was found by Cheapflights users on 4/14. 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 7/262:28 pmMIA - SJO
Nonstop2h 49mVolaris Costa Rica
Sat 8/28:14 amSJO - MIA
Nonstop2h 43mVolaris Costa Rica
Deal found 4/14$228
This Kiwi.com deal was found by Cheapflights users on 4/14. 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.
Mon 6/232:09 pmMIA - SJO
1 stop7h 26mArajet
Thu 9/118:42 amSJO - MIA
1 stop7h 13mArajet
Deal found 4/14$230
This Booking.com deal was found by Cheapflights users on 4/14. 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 9/65:45 pmMIA - SJO
2 stops7h 50mMultiple Airlines
Thu 9/118:42 amSJO - MIA
1 stop7h 13mMultiple Airlines
Deal found 4/14$236
This CheapOair deal was found by Cheapflights users on 4/15. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/42:28 pmMIA - SJO
Nonstop2h 49mVolaris El Salvador
Sun 7/64:17 pmSJO - MIA
1 stop16h 55mVolaris El Salvador
Deal found 4/15$256
This Booking.com deal was found by Cheapflights users on 4/14. 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.
Tue 5/611:05 amMIA - SJO
2 stops25h 22mSpirit Airlines
Tue 5/1311:32 amSJO - MIA
2 stops29h 13mSpirit Airlines
Deal found 4/14$261
This Vliegwinkel deal was found by Cheapflights users on 4/15. 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 Vliegwinkel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/223:10 pmMIA - SJO
1 stop5h 35mAvianca
Wed 8/68:50 amSJO - MIA
Nonstop2h 50mAvianca
Deal found 4/15$262
This American Airlines deal was found by Cheapflights users on 4/14. 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 6/127:09 pmMIA - SJO
Nonstop3h 00mAmerican Airlines
Wed 6/186:10 amSJO - MIA
Nonstop3h 00mAmerican Airlines
Deal found 4/14$275
This Copa Airlines deal was found by Cheapflights users on 4/14. 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 Copa Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 6/16:20 amMIA - SJO
1 stop12h 02mCopa Airlines
Sat 6/710:57 amSJO - MIA
1 stop6h 58mCopa Airlines
Deal found 4/14$278
This United Airlines deal was found by Cheapflights users on 4/14. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/129:00 amMIA - SJO
1 stop29h 26mUnited Airlines
Mon 5/197:55 amSJO - MIA
1 stop10h 39mUnited Airlines
Deal found 4/14$385
This American Airlines deal was found by Cheapflights users on 4/15. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/1310:30 amMIA - LIR
Nonstop3h 15mAmerican Airlines
Thu 5/2212:45 pmLIR - MIA
Nonstop2h 50mAmerican Airlines
Deal found 4/15$410
This Delta deal was found by Cheapflights users on 4/15. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/137:00 amMIA - LIR
1 stop7h 00mDelta
Thu 5/221:25 pmLIR - MIA
1 stop9h 12mDelta
Deal found 4/15$425
This United Airlines deal was found by Cheapflights users on 4/15. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/136:30 amMIA - LIR
1 stop7h 40mUnited Airlines
Fri 6/2011:05 amLIR - MIA
1 stop9h 40mUnited Airlines
Deal found 4/15$510

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 April 15, 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 6/23

2:09 pm-7:35 pm

1 stop7h 26m

San José Juan Santamaria Intl

Thu 9/11

8:42 am-5:55 pm

1 stop7h 13m

$230

MiamiSan José

MIA - SJO

MIASJO

Miami

Wed 6/18

9:40 pm-10:40 pm

Nonstop3h 00m

San José Juan Santamaria Intl

Thu 9/11

8:42 am-5:55 pm

1 stop7h 13m

$242

MiamiSan José

MIA - SJO

MIASJO

Miami

Mon 7/7

2:28 pm-3:17 pm

Nonstop2h 49m

San José Juan Santamaria Intl

Fri 7/11

8:14 am-12:57 pm

Nonstop2h 43m

$245

MiamiSan José

MIA - SJO

MIASJO

Miami

Tue 5/6

11:05 am-10:27 am

2 stops25h 22m

San José Juan Santamaria Intl

Tue 5/13

11:32 am-6:45 pm

2 stops29h 13m

$261

MiamiSan José

MIA - SJO

MIASJO

Miami

Fri 5/9

9:40 pm-10:40 pm

Nonstop3h 00m

San José Juan Santamaria Intl

Sun 5/11

5:25 pm-11:55 pm

1 stop4h 30m

$266

MiamiSan José

MIA - SJO

MIASJO

Miami

Thu 6/12

7:09 pm-8:09 pm

Nonstop3h 00m

San José Juan Santamaria Intl

Wed 6/18

6:10 am-11:10 am

Nonstop3h 00m

$275

MiamiSan José

MIA - SJO

MIASJO

Miami

Sun 6/1

6:20 am-4:22 pm

1 stop12h 02m

San José Juan Santamaria Intl

Sat 6/7

10:57 am-7:55 pm

1 stop6h 58m

$278

MiamiSan José

MIA - SJO

MIASJO

Miami

Mon 5/12

9:00 am-12:26 pm

1 stop29h 26m

San José Juan Santamaria Intl

Mon 5/19

7:55 am-8:34 pm

1 stop10h 39m

$385

MiamiLiberia

MIA - LIR

MIALIR

Miami

Tue 5/13

10:30 am-11:45 am

Nonstop3h 15m

Liberia

Thu 5/22

12:45 pm-5:35 pm

Nonstop2h 50m

$410

MiamiLiberia

MIA - LIR

MIALIR

Miami

Tue 5/13

7:00 am-12:00 pm

1 stop7h 00m

Liberia

Thu 5/22

1:25 pm-12:37 am

1 stop9h 12m

$425

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/15

Showing 1-10 of 34 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 April 15, 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 Monday 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 April 15, 2025.

The most flights from KE9 to CR0 are scheduled on a Monday (9 on average). You will have fewer flight options on Thursday, which is when the least amount of flights are scheduled (7 on average).

Rainfall in Costa Rica by month

Plan your trip to Costa Rica by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Costa Rica ranges from 0.0 - 11.8 inches per month. September is typically the wettest month, when rainfall can reach 11.8 in. February is typically the driest time to visit Costa Rica when rainfall is around 0.0 in.

Temperature in Costa Rica by month

Plan your trip to Costa Rica by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Costa Rica, use this chart to help with planning. For those seeking warmer temperatures, April is the ideal time of year to visit, when temperatures reach an average of 69.8 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 64.4 F).

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 April 15, 2025.
Get a feel of what it's like to fly with Delta, Alaska Airlines and Southwest from Key Largo to Costa Rica by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,918 reviews

Food

7.3

Crew

8.5

Boarding

8.2

Entertainment

7.9

Comfort

7.9

Overall

8.0

Reviews

1 / 20
2.0
Mediocre

Santiago,Apr 2024

MCO - ATL

When I was going to board, one of the staff members told me that I could not board with my passport bag because it was tree items and I would need to check a bag. This was so stupid ! The bag was small. So I had to put my things in my pockets, put the funny bag inside the other bag. Then go throw it. Then in the plane put everything back again in my funny bag.
Delta
8.0
Very good
7,918 reviews
Delta
8.0
Very good
7,918 reviews

Food

7.3

Crew

8.5

Boarding

8.2

Entertainment

7.9

Comfort

7.9

Overall

8.0

Reviews

1 / 20
2.0
Mediocre

Santiago,Apr 2024

MCO - ATL

When I was going to board, one of the staff members told me that I could not board with my passport bag because it was tree items and I would need to check a bag. This was so stupid ! The bag was small. So I had to put my things in my pockets, put the funny bag inside the other bag. Then go throw it. Then in the plane put everything back again in my funny bag.
Alaska Airlines
8.0
Very good
9,871 reviews
Delta
8.0
Very good
7,918 reviews

Food

7.3

Crew

8.5

Boarding

8.2

Entertainment

7.9

Comfort

7.9

Overall

8.0

Reviews

1 / 20
2.0
Mediocre

Santiago,Apr 2024

MCO - ATL

When I was going to board, one of the staff members told me that I could not board with my passport bag because it was tree items and I would need to check a bag. This was so stupid ! The bag was small. So I had to put my things in my pockets, put the funny bag inside the other bag. Then go throw it. Then in the plane put everything back again in my funny bag.
Southwest
8.0
Very good
4,279 reviews
Delta
8.0
Very good
7,918 reviews

Food

7.3

Crew

8.5

Boarding

8.2

Entertainment

7.9

Comfort

7.9

Overall

8.0

Reviews

1 / 20
2.0
Mediocre

Santiago,Apr 2024

MCO - ATL

When I was going to board, one of the staff members told me that I could not board with my passport bag because it was tree items and I would need to check a bag. This was so stupid ! The bag was small. So I had to put my things in my pockets, put the funny bag inside the other bag. Then go throw it. Then in the plane put everything back again in my funny bag.
Copa Airlines
7.6
Good
1,408 reviews
Delta
8.0
Very good
7,918 reviews

Food

7.3

Crew

8.5

Boarding

8.2

Entertainment

7.9

Comfort

7.9

Overall

8.0

Reviews

1 / 20
2.0
Mediocre

Santiago,Apr 2024

MCO - ATL

When I was going to board, one of the staff members told me that I could not board with my passport bag because it was tree items and I would need to check a bag. This was so stupid ! The bag was small. So I had to put my things in my pockets, put the funny bag inside the other bag. Then go throw it. Then in the plane put everything back again in my funny bag.
LATAM Airlines
7.5
Good
1,758 reviews
Delta
8.0
Very good
7,918 reviews

Food

7.3

Crew

8.5

Boarding

8.2

Entertainment

7.9

Comfort

7.9

Overall

8.0

Reviews

1 / 20
2.0
Mediocre

Santiago,Apr 2024

MCO - ATL

When I was going to board, one of the staff members told me that I could not board with my passport bag because it was tree items and I would need to check a bag. This was so stupid ! The bag was small. So I had to put my things in my pockets, put the funny bag inside the other bag. Then go throw it. Then in the plane put everything back again in my funny bag.

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 3 users in the past month. Keep an eye out for changes in search interest prior to high and low season.

  • 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 Arajet. Other airlines that offer cheap prices include Spirit Airlines from $107 and Avianca from $120 one-way.

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

    Consider American Airlines (79%), British Airways (76%) or Iberia (76%) 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 $590, our data shows the cheapest flight currently is $95. When looking at the most popular route, (Miami - San José Juan Santamaria Intl), you can expect to pay $215 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 8 airlines flying from Key Largo to Costa Rica

Discover the top 8 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 April 15, 2025.
AirlineCheapestAverageFlexibilityOn-time
Spirit AirlinesCheapest$153Average$262FlexibilityNo cancel feeOn-time65%
Copa AirlinesCheapest$161Average$315FlexibilityNo cancel feeOn-time70%
JetBlueCheapest$196Average$360FlexibilityNo cancel feeOn-time62%
AviancaCheapest$211Average$276FlexibilityNo cancel feeOn-time71%
Volaris El SalvadorCheapest$216Average$239FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$279Average$674FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$443Average$619FlexibilityNo cancel feeOn-time69%
DeltaCheapest$486Average$643FlexibilityNo cancel feeOn-timeN/A

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