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$97+ 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 6/24. Fares are subject to change and may not be available on all flights or dates of travel.
MIA — SJO
Jun 17 — Jun 241
Tue 6/17
Tue 6/24
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 June 12, 2025.

Round-trip from

$208
(Avianca)

One-way from

$97
(Avianca)

Popular in

December

Cheapest in

May

Average price

$336
From Key Largo to Costa Rica
Search Deals
One-way flight from Key Largo to Costa Rica
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Highest demand for flights based on searches. 19% potential increase in price ($89 potential increase over avg. RT price).
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Cheapest flight prices on average. 5% potential price decrease ($20 potential savings vs. average RT price).
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Average for round-trip flights in June 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 June 12, 2025.

This Avianca deal was found by Cheapflights users on 6/11. 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 6/183:10 pmMIA - SJO
2 stops10h 05mAvianca
Mon 6/305:05 amSJO - MIA
2 stops6h 50mAvianca
Deal found 6/11$208
This Gotogate deal was found by Cheapflights users on 6/10. 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.
Thu 10/309:40 pmMIA - SJO
Nonstop3h 00mMultiple Airlines
Sun 11/28:10 amSJO - MIA
Nonstop2h 42mMultiple Airlines
Deal found 6/10$219
This Copa Airlines deal was found by Cheapflights users on 6/11. 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.
Thu 8/286:31 pmMIA - SJO
1 stop15h 49mCopa Airlines
Tue 9/210:57 amSJO - MIA
1 stop9h 30mCopa Airlines
Deal found 6/11$224
This CheapOair deal was found by Cheapflights users on 6/10. 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.
Sat 11/221:33 pmMIA - SJO
Nonstop2h 53mVolaris Costa Rica
Sat 11/298:19 amSJO - MIA
Nonstop2h 42mVolaris Costa Rica
Deal found 6/10$253
This FlightHub deal was found by Cheapflights users on 6/11. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/67:09 pmMIA - SJO
2 stops19h 31mSpirit Airlines
Fri 9/1212:23 pmSJO - MIA
2 stops20h 16mSpirit Airlines
Deal found 6/11$308
This deal was found by Cheapflights users on 6/10. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/2910:05 amMIA - SJO
Nonstop3h 05mAmerican Airlines
Sat 11/12:25 pmSJO - MIA
Nonstop3h 00mAmerican Airlines
Deal found 6/10$321
This American Airlines deal was found by Cheapflights users on 6/11. 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 10/1410:05 amMIA - LIR
Nonstop3h 10mAmerican Airlines
Tue 10/2112:55 pmLIR - MIA
Nonstop3h 00mAmerican Airlines
Deal found 6/11$378
This Delta deal was found by Cheapflights users on 6/10. 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 8/55:30 amMIA - LIR
1 stop8h 30mDelta
Tue 8/121:25 pmLIR - MIA
1 stop8h 59mDelta
Deal found 6/10$393
This United Airlines deal was found by Cheapflights users on 6/11. 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 7/34:53 pmMIA - LIR
1 stop19h 07mUnited Airlines
Wed 7/911:05 amLIR - MIA
1 stop9h 34mUnited Airlines
Deal found 6/11$422
This Kiwi.com deal was found by Cheapflights users on 6/12. 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.
Tue 7/89:40 pmMIA - LIR
1 stop17h 30mMultiple Airlines
Sat 7/2610:15 amLIR - MIA
1 stop25h 25mMultiple Airlines
Deal found 6/12$487
This Southwest deal was found by Cheapflights users on 6/10. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/199:00 pmMIA - LIR
2 stops17h 45mSouthwest
Thu 7/242:10 pmLIR - MIA
1 stop7h 45mSouthwest
Deal found 6/10$539
This FlightHub deal was found by Cheapflights users on 6/11. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/1611:40 amMIA - LIR
2 stops50h 41mWestJet
Wed 10/221:25 pmLIR - MIA
2 stops30h 11mWestJet
Deal found 6/11$655

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 June 12, 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

Sat 7/5

3:25 pm-11:35 pm

2 stops10h 10m

San José Juan Santamaria Intl

Sat 7/12

2:40 pm-4:05 am

2 stops11h 25m

$208

MiamiSan José

MIA - SJO

MIASJO

Miami

Thu 10/30

9:40 pm-10:40 pm

Nonstop3h 00m

San José Juan Santamaria Intl

Sun 11/2

8:10 am-11:52 am

Nonstop2h 42m

$219

MiamiSan José

MIA - SJO

MIASJO

Miami

Thu 8/28

6:31 pm-8:20 am

1 stop15h 49m

San José Juan Santamaria Intl

Tue 9/2

10:57 am-10:27 pm

1 stop9h 30m

$224

MiamiSan José

MIA - SJO

MIASJO

Miami

Sat 11/22

1:33 pm-3:26 pm

Nonstop2h 53m

San José Juan Santamaria Intl

Sat 11/29

8:19 am-12:01 pm

Nonstop2h 42m

$253

MiamiSan José

MIA - SJO

MIASJO

Miami

Sat 9/6

7:09 pm-12:40 pm

2 stops19h 31m

San José Juan Santamaria Intl

Fri 9/12

12:23 pm-10:39 am

2 stops20h 16m

$308

MiamiSan José

MIA - SJO

MIASJO

Miami

Wed 10/29

10:05 am-11:10 am

Nonstop3h 05m

San José Juan Santamaria Intl

Sat 11/1

2:25 pm-7:25 pm

Nonstop3h 00m

$321

MiamiSan José

MIA - SJO

MIASJO

Miami

Tue 7/8

7:00 am-10:11 am

1 stop29h 11m

San José Juan Santamaria Intl

Tue 7/15

5:30 am-3:51 pm

1 stop8h 21m

$354

MiamiLiberia

MIA - LIR

MIALIR

Miami

Mon 7/7

10:35 am-11:45 am

Nonstop3h 10m

Liberia

Wed 7/9

12:45 pm-5:45 pm

Nonstop3h 00m

$378

MiamiLiberia

MIA - LIR

MIALIR

Miami

Tue 8/5

5:30 am-12:00 pm

1 stop8h 30m

Liberia

Tue 8/12

1:25 pm-12:24 am

1 stop8h 59m

$393

MiamiLiberia

MIA - LIR

MIALIR

Miami

Thu 7/3

4:53 pm-10:00 am

1 stop19h 07m

Liberia

Wed 7/9

11:05 am-10:39 pm

1 stop9h 34m

$422

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/11

Showing 1-10 of 27 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 June 12, 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 June 12, 2025.

The most flights from KE9 to CR0 are scheduled on a Thursday (10 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (8 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 June 12, 2025.
Get a feel of what it's like to fly with Alaska Airlines, Southwest and Delta 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.
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Boarding

8.1

Crew

8.5

Entertainment

7.1

Comfort

7.8

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Surinder,May 2025

SEA - YYZ

My wife wanted the aile seat and I always prefer window seat. Luckily we both got the best seats we wanted. The plane was very nice and we enjoyed the best take off and the smooth landing at Toronto. All the services by the staff inside the aeroplane were very nice well appreciated. Thanks again and hope to see you soon.
Alaska Airlines
8.0
Very good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Boarding

8.1

Crew

8.5

Entertainment

7.1

Comfort

7.8

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Surinder,May 2025

SEA - YYZ

My wife wanted the aile seat and I always prefer window seat. Luckily we both got the best seats we wanted. The plane was very nice and we enjoyed the best take off and the smooth landing at Toronto. All the services by the staff inside the aeroplane were very nice well appreciated. Thanks again and hope to see you soon.
Southwest
8.0
Very good
4,287 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Boarding

8.1

Crew

8.5

Entertainment

7.1

Comfort

7.8

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Surinder,May 2025

SEA - YYZ

My wife wanted the aile seat and I always prefer window seat. Luckily we both got the best seats we wanted. The plane was very nice and we enjoyed the best take off and the smooth landing at Toronto. All the services by the staff inside the aeroplane were very nice well appreciated. Thanks again and hope to see you soon.
Delta
8.0
Very good
7,950 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Boarding

8.1

Crew

8.5

Entertainment

7.1

Comfort

7.8

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Surinder,May 2025

SEA - YYZ

My wife wanted the aile seat and I always prefer window seat. Luckily we both got the best seats we wanted. The plane was very nice and we enjoyed the best take off and the smooth landing at Toronto. All the services by the staff inside the aeroplane were very nice well appreciated. Thanks again and hope to see you soon.
Copa Airlines
7.5
Good
1,451 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Boarding

8.1

Crew

8.5

Entertainment

7.1

Comfort

7.8

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Surinder,May 2025

SEA - YYZ

My wife wanted the aile seat and I always prefer window seat. Luckily we both got the best seats we wanted. The plane was very nice and we enjoyed the best take off and the smooth landing at Toronto. All the services by the staff inside the aeroplane were very nice well appreciated. Thanks again and hope to see you soon.

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 5 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 $97 on Avianca. Other airlines that offer cheap prices include Copa Airlines from $99 and Arajet from $113 one-way.

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

    Consider Qatar Airways (88%), Avianca (86%) or Avianca Costa Rica (86%) 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 $249, our data shows the cheapest flight currently is $92. When looking at the most popular route, (Miami - San José Juan Santamaria Intl), you can expect to pay $151 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 June 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
Spirit AirlinesCheapest$157Average$262FlexibilityNo cancel feeOn-time65%
Copa AirlinesCheapest$161Average$307FlexibilityNo cancel feeOn-time70%
JetBlueCheapest$190Average$352FlexibilityNo cancel feeOn-time62%
Volaris El SalvadorCheapest$204Average$234FlexibilityNo cancel feeOn-timeN/A
AviancaCheapest$210Average$254FlexibilityNo cancel feeOn-time71%
American AirlinesCheapest$277Average$578FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$443Average$661FlexibilityNo cancel feeOn-time69%
DeltaCheapest$486Average$636FlexibilityNo cancel feeOn-timeN/A

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