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$89+ 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 8/11. Fares are subject to change and may not be available on all flights or dates of travel.
MIA — SJO
ago. 4 — ago. 111
lun. 8/4
lun. 8/11
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 julio 30, 2025.

Round-trip from

$180
(Mytrip)

One-way from

$89
(FlightHub)

Popular in

December

Cheapest in

August

Average price

$297
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 ($102 potential increase over avg. RT price).
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Cheapest flight prices on average. 6% potential price decrease ($21 potential savings vs. average RT price).
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Average for round-trip flights in July 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 julio 30, 2025.

This Cheapflightsfares deal was found by Cheapflights users on 7/30. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 8/22:28 pmMIA - SJO
Nonstop2h 49mMultiple Airlines
vie. 8/88:14 amSJO - MIA
Nonstop2h 43mMultiple Airlines
Deal found 7/30$179
This eDestinos deal was found by Cheapflights users on 7/27. 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.
dom. 8/32:28 pmMIA - SJO
Nonstop2h 49mVolaris El Salvador
dom. 8/108:14 amSJO - MIA
Nonstop2h 43mVolaris El Salvador
Deal found 7/27$197
This Avianca deal was found by Cheapflights users on 7/28. 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.
vie. 8/225:35 amMIA - SJO
1 stop4h 15mAvianca
dom. 8/315:25 pmSJO - MIA
1 stop4h 30mAvianca
Deal found 7/28$203
This Copa Airlines deal was found by Cheapflights users on 7/30. 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 Copa Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 12/44:59 amMIA - SJO
1 stop5h 06mCopa Airlines
dom. 12/72:19 pmSJO - MIA
1 stop9h 26mCopa Airlines
Deal found 7/30$234
This Delta deal was found by Cheapflights users on 7/29. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dom. 9/286:00 amMIA - LIR
1 stop8h 00mDelta
vie. 10/31:25 pmLIR - MIA
1 stop8h 58mDelta
Deal found 7/29$345
This American Airlines deal was found by Cheapflights users on 7/29. 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.
mié. 9/310:52 amMIA - LIR
Nonstop2h 57mAmerican Airlines
mié. 9/1012:49 pmLIR - MIA
Nonstop2h 57mAmerican Airlines
Deal found 7/29$360
This United Airlines deal was found by Cheapflights users on 7/29. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 10/146:45 amMIA - LIR
1 stop7h 25mUnited Airlines
vie. 10/171:20 pmLIR - MIA
1 stop29h 41mUnited Airlines
Deal found 7/29$383
This Kiwi.com deal was found by Cheapflights users on 7/30. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 8/45:35 amMIA - LIR
2 stops8h 15mMultiple Airlines
sáb. 8/910:15 amLIR - MIA
1 stop25h 25mMultiple Airlines
Deal found 7/30$506

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 julio 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

sáb. 8/2

2:28 pm-3:17 pm

Nonstop2h 49m

San José Juan Santamaria Intl

vie. 8/8

8:14 am-12:57 pm

Nonstop2h 43m

$179

MiamiSan José

MIA - SJO

MIASJO

Miami

dom. 8/3

2:28 pm-3:17 pm

Nonstop2h 49m

San José Juan Santamaria Intl

dom. 8/10

8:14 am-12:57 pm

Nonstop2h 43m

$197

MiamiSan José

MIA - SJO

MIASJO

Miami

vie. 8/22

5:35 am-7:50 am

1 stop4h 15m

San José Juan Santamaria Intl

dom. 8/31

5:25 pm-11:55 pm

1 stop4h 30m

$203

MiamiLiberia

MIA - LIR

MIALIR

Miami

dom. 9/28

6:00 am-12:00 pm

1 stop8h 00m

Liberia

vie. 10/3

1:25 pm-12:23 am

1 stop8h 58m

$345

MiamiLiberia

MIA - LIR

MIALIR

Miami

mié. 9/3

10:52 am-11:49 am

Nonstop2h 57m

Liberia

mié. 9/10

12:49 pm-5:46 pm

Nonstop2h 57m

$360

MiamiLiberia

MIA - LIR

MIALIR

Miami

mar. 10/14

6:45 am-12:10 pm

1 stop7h 25m

Liberia

vie. 10/17

1:20 pm-9:01 pm

1 stop29h 41m

$383

MiamiLiberia

MIA - LIR

MIALIR

Miami

lun. 8/4

5:35 am-11:50 am

2 stops8h 15m

Liberia

sáb. 8/9

10:15 am-1:40 pm

1 stop25h 25m

$506

MiamiSan José

MIA - SJO

MIASJO

Miami

lun. 8/11

2:28 pm-3:17 pm

Nonstop2h 49m

$89

MiamiSan José

MIA - SJO

MIASJO

Miami

lun. 8/11

5:35 am-7:50 am

1 stop4h 15m

$94

MiamiSan José

MIA - SJO

MIASJO

Miami

vie. 9/19

3:50 pm-11:14 am

2 stops21h 24m

$116

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/30

Showing 1-10 of 20 results
1
2

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 julio 30, 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 julio 30, 2025.

The most flights from KE9 to CR0 are scheduled on a Monday (13 on average). You will have fewer flight options on Wednesday, which is when the least amount of flights are scheduled (9 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 julio 30, 2025.
Read reviews from past customers who have flown Delta, Copa Airlines, and United 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.
Delta
8.0
Very good
7,980 reviews

Boarding

8.2

Crew

8.5

Food

7.3

Overall

8.0

Comfort

7.9

Entertainment

7.9

Reviews

1 / 20
6.0
Good

pilar,May 2025

RSW - ATL

The stewardess was not very nice because I requested two glasses of water. She didn’t even offer the snacks to me. She seemed angry and I felt very bad about her reaction. Also, the flight was full and you could not move. The airline should provide seats for obese people in consideration to the rest pf the passengers.
Delta
8.0
Very good
7,980 reviews
Delta
8.0
Very good
7,980 reviews

Boarding

8.2

Crew

8.5

Food

7.3

Overall

8.0

Comfort

7.9

Entertainment

7.9

Reviews

1 / 20
6.0
Good

pilar,May 2025

RSW - ATL

The stewardess was not very nice because I requested two glasses of water. She didn’t even offer the snacks to me. She seemed angry and I felt very bad about her reaction. Also, the flight was full and you could not move. The airline should provide seats for obese people in consideration to the rest pf the passengers.
Copa Airlines
7.5
Good
1,493 reviews
Delta
8.0
Very good
7,980 reviews

Boarding

8.2

Crew

8.5

Food

7.3

Overall

8.0

Comfort

7.9

Entertainment

7.9

Reviews

1 / 20
6.0
Good

pilar,May 2025

RSW - ATL

The stewardess was not very nice because I requested two glasses of water. She didn’t even offer the snacks to me. She seemed angry and I felt very bad about her reaction. Also, the flight was full and you could not move. The airline should provide seats for obese people in consideration to the rest pf the passengers.
United Airlines
7.4
Good
8,896 reviews
Delta
8.0
Very good
7,980 reviews

Boarding

8.2

Crew

8.5

Food

7.3

Overall

8.0

Comfort

7.9

Entertainment

7.9

Reviews

1 / 20
6.0
Good

pilar,May 2025

RSW - ATL

The stewardess was not very nice because I requested two glasses of water. She didn’t even offer the snacks to me. She seemed angry and I felt very bad about her reaction. Also, the flight was full and you could not move. The airline should provide seats for obese people in consideration to the rest pf the passengers.
American Airlines
7.2
Good
10,000 reviews
Delta
8.0
Very good
7,980 reviews

Boarding

8.2

Crew

8.5

Food

7.3

Overall

8.0

Comfort

7.9

Entertainment

7.9

Reviews

1 / 20
6.0
Good

pilar,May 2025

RSW - ATL

The stewardess was not very nice because I requested two glasses of water. She didn’t even offer the snacks to me. She seemed angry and I felt very bad about her reaction. Also, the flight was full and you could not move. The airline should provide seats for obese people in consideration to the rest pf the passengers.

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 7 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 $89 on Volaris El Salvador. Other airlines that offer cheap prices include Avianca from $94 and Spirit Airlines from $116 one-way.

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

    Consider American Airlines (79%), Iberia (79%) or Avianca (78%) 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 $214, our data shows the cheapest flight currently is $84. When looking at the most popular route, (Miami - San José Juan Santamaria Intl), you can expect to pay $121 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 julio 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
AviancaCheapest$105Average$250FlexibilityNo cancel feeOn-time71%
Spirit AirlinesCheapest$157Average$258FlexibilityNo cancel feeOn-time65%
Copa AirlinesCheapest$166Average$299FlexibilityNo cancel feeOn-time70%
JetBlueCheapest$182Average$351FlexibilityNo cancel feeOn-time62%
Volaris El SalvadorCheapest$196Average$234FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$252Average$557FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$443Average$661FlexibilityNo cancel feeOn-time69%
DeltaCheapest$493Average$591FlexibilityNo cancel feeOn-timeN/A

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