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Saint Lucia

$213+ Cheap flights from Key Largo, FL to Saint Lucia

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 11/6. Fares are subject to change and may not be available on all flights or dates of travel.
MIA — UVF
Nov 29 — Dec 61
Sat 11/29
Sat 12/6
1 adult, Economy
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Cheap flight deals from Key Largo to Saint Lucia

Keep the following information in mind while searching for Key Largo to Saint Lucia flight deals. Data was last updated October 30, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$493
(American Airlines)

One-way from

$213
(SmartFares)

Popular in

July

Cheapest in

August

Average price

$680
Provider with most accurate pricing for Miami-Castries George F. L. Charle flight deals.
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Provider most trusted by Cheapflights users for Miami-Castries George F. L. Charle flights.
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From Key Largo to Saint Lucia
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One-way flight from Key Largo to Saint Lucia
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Highest demand for flights based on searches. 11% potential increase in price ($93 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($25 potential savings vs. average RT price).
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Average for round-trip flights in October 2025
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Find flight deals from Key Largo to Saint Lucia

Cheapest flights from Key Largo to Saint Lucia
Explore the most affordable flight options available from Key Largo to Saint Lucia. Find the lowest fares from popular airlines and budget airlines, with prices last updated on October 30, 2025.

This Gotogate deal was found by Cheapflights users on 10/28. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/13:10 pmMIA - SLU
1 stop7h 00mCaribbean Airlines
Wed 11/510:25 amSLU - MIA
1 stop26h 50mCaribbean Airlines
Deal found 10/28$536
This SmartFares deal was found by Cheapflights users on 10/29. 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 SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/272:10 pmMIA - SLU
1 stop24h 05mCaribbean Airlines
Mon 12/14:20 pmSLU - MIA
1 stop20h 55mCaribbean Airlines
Deal found 10/29$541
This Gotogate deal was found by Cheapflights users on 10/30. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/62:10 pmMIA - SLU
1 stop7h 00mCaribbean Airlines
Wed 12/1010:25 amSLU - MIA
1 stop26h 50mCaribbean Airlines
Deal found 10/30$562
This Caribbean Airlines deal was found by Cheapflights users on 10/29. 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 Caribbean Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/22:10 pmMIA - SLU
1 stop24h 25mCaribbean Airlines
Sun 11/95:00 amSLU - MIA
1 stop8h 15mCaribbean Airlines
Deal found 10/29$563
This Trip.com deal was found by Cheapflights users on 10/30. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/62:10 pmMIA - SLU
1 stop7h 00mCaribbean Airlines
Thu 12/116:20 pmSLU - MIA
1 stop18h 55mCaribbean Airlines
Deal found 10/30$567
This SmartFares deal was found by Cheapflights users on 10/29. 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 SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/282:10 pmMIA - SLU
1 stop22h 00mCaribbean Airlines
Sun 12/75:00 amSLU - MIA
1 stop8h 15mCaribbean Airlines
Deal found 10/29$575
This Kiwi.com deal was found by Cheapflights users on 10/30. 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.
Tue 11/112:10 pmMIA - SLU
1 stop18h 20mCaribbean Airlines
Sat 11/156:20 pmSLU - MIA
1 stop18h 55mCaribbean Airlines
Deal found 10/30$584
This SmartFares deal was found by Cheapflights users on 10/30. 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 SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/132:10 pmMIA - SLU
1 stop7h 00mCaribbean Airlines
Mon 1/124:20 pmSLU - MIA
1 stop20h 55mCaribbean Airlines
Deal found 10/30$591
This Kiwi.com deal was found by Cheapflights users on 10/30. 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.
Sat 11/152:10 pmMIA - SLU
1 stop7h 00mCaribbean Airlines
Mon 11/174:20 pmSLU - MIA
1 stop20h 55mCaribbean Airlines
Deal found 10/30$593
This Kiwi.com deal was found by Cheapflights users on 10/30. 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.
Tue 11/112:10 pmMIA - SLU
1 stop18h 20mCaribbean Airlines
Sun 11/165:00 amSLU - MIA
1 stop8h 15mCaribbean Airlines
Deal found 10/30$594
This Expedia deal was found by Cheapflights users on 10/29. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/282:10 pmMIA - SLU
1 stop22h 00mCaribbean Airlines
Fri 12/512:15 pmSLU - MIA
1 stop25h 00mCaribbean Airlines
Deal found 10/29$597
This Kiwi.com deal was found by Cheapflights users on 10/30. 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.
Sat 11/152:10 pmMIA - SLU
1 stop7h 00mCaribbean Airlines
Sun 11/165:00 amSLU - MIA
1 stop8h 15mCaribbean Airlines
Deal found 10/30$603

Cheapflights Fare Finder

 
Customize your flight search to find flights from Key Largo to Saint Lucia 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 October 30, 2025.
Use the filters below to find and compare flights from Key Largo to Saint Lucia that are best for you.

Fly from

Key Largo

Fly to

Saint Lucia

Route

Depart

Return

Price

MiamiCastries

MIA - UVF

MIAUVF

Miami

Mon 3/2

11:20 am-4:02 pm

Nonstop3h 42m

Castries Hewanorra

Tue 3/10

3:50 pm-7:55 pm

Nonstop4h 05m

$493

MiamiCastries

MIA - UVF

MIAUVF

Miami

Mon 2/2

6:00 am-3:05 pm

1 stop8h 05m

Castries Hewanorra

Wed 2/11

4:25 pm-12:51 am

1 stop9h 26m

$500

MiamiCastries

MIA - UVF

MIAUVF

Miami

Mon 3/16

7:35 pm-2:04 pm

1 stop18h 29m

Castries Hewanorra

Wed 3/25

3:24 pm-12:57 am

1 stop9h 33m

$500

MiamiCastries

MIA - UVF

MIAUVF

Miami

Wed 4/1

7:00 am-2:04 pm

1 stop7h 04m

Castries Hewanorra

Wed 4/8

3:24 pm-12:57 am

1 stop9h 33m

$507

MiamiCastries

MIA - SLU

MIASLU

Miami

Wed 2/4

2:10 pm-2:35 pm

2 stops23h 25m

Castries George F. L. Charle

Thu 2/5

6:20 pm-12:15 pm

1 stop18h 55m

$530

MiamiCastries

MIA - SLU

MIASLU

Miami

Thu 1/22

2:10 pm-11:30 am

1 stop20h 20m

Castries George F. L. Charle

Mon 1/26

4:20 pm-12:15 pm

1 stop20h 55m

$541

MiamiCastries

MIA - UVF

MIAUVF

Miami

Sat 2/28

11:20 am-4:02 pm

Nonstop3h 42m

Castries Hewanorra

Sat 3/7

3:50 pm-6:52 pm

Nonstop4h 02m

$543

MiamiCastries

MIA - UVF

MIAUVF

Miami

Thu 1/29

7:25 pm-3:05 pm

1 stop18h 40m

Castries Hewanorra

Sun 2/8

4:25 pm-9:26 am

1 stop18h 01m

$550

MiamiCastries

MIA - SLU

MIASLU

Miami

Sat 12/6

2:10 pm-10:10 pm

1 stop7h 00m

Castries George F. L. Charle

Wed 12/10

10:25 am-12:15 pm

1 stop26h 50m

$562

MiamiCastries

MIA - SLU

MIASLU

Miami

Fri 1/16

2:10 pm-1:10 pm

1 stop22h 00m

Castries George F. L. Charle

Mon 1/19

4:20 pm-12:15 pm

1 stop20h 55m

$563

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/30

Showing 1-10 of 37 results
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Best time to book a flight from Key Largo to Saint Lucia

Have a flexible travel schedule? Discover the best time to fly to Saint Lucia 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 Saint Lucia

What is the cheapest month to book a flight from Key Largo to Saint Lucia?

Currently, February is the cheapest month in which you can book a flight from Key Largo to Saint Lucia (average of $445). Flying from Key Largo to Saint Lucia in July is currently the most expensive (average of $608). 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 LC?

Find hourly flight availability from Key Largo to Saint Lucia. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated October 30, 2025.

When flying from Key Largo to Saint Lucia, the time of day you fly usually plays a role in the price. Save by searching for a flight at noon, which can drop the price by up to 27% versus a flight in the evening.

What is the cheapest day to fly from Key Largo to Saint Lucia?

Use this chart to determine the cheapest time to fly round-trip from Key Largo to Saint Lucia. Price data was last updated on December 1, 2024.

Travelers seeking maximum savings on their Key Largo to Saint Lucia flight should consider departing on Tuesday mornings when fares are most often at their lowest. Thursday at noon flights should be avoided if possible as fares are typically the most expensive at this time.

Reviews of airlines servicing Saint Lucia

Get insights into the airlines that provide service to Saint Lucia. 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 Saint Lucia. Reviews last updated October 30, 2025.
Read through reviews of airlines operating flights from Key Largo to Saint Lucia, such as Caribbean Airlines, Delta, and American Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Caribbean Airlines
8.0
Very good
194 reviews

Boarding

8.1

Crew

8.4

Overall

8.0

Food

6.8

Comfort

7.8

Entertainment

6.7

Reviews

1 / 14
8.0
Excellent

Boy,Oct 2025

YYZ - POS

A few selection of caribbean foods limit the pasta dish etc
Caribbean Airlines
8.0
Very good
194 reviews
Caribbean Airlines
8.0
Very good
194 reviews

Boarding

8.1

Crew

8.4

Overall

8.0

Food

6.8

Comfort

7.8

Entertainment

6.7

Reviews

1 / 14
8.0
Excellent

Boy,Oct 2025

YYZ - POS

A few selection of caribbean foods limit the pasta dish etc
Delta
7.9
Good
7,998 reviews
Caribbean Airlines
8.0
Very good
194 reviews

Boarding

8.1

Crew

8.4

Overall

8.0

Food

6.8

Comfort

7.8

Entertainment

6.7

Reviews

1 / 14
8.0
Excellent

Boy,Oct 2025

YYZ - POS

A few selection of caribbean foods limit the pasta dish etc
American Airlines
7.2
Good
11,034 reviews
Caribbean Airlines
8.0
Very good
194 reviews

Boarding

8.1

Crew

8.4

Overall

8.0

Food

6.8

Comfort

7.8

Entertainment

6.7

Reviews

1 / 14
8.0
Excellent

Boy,Oct 2025

YYZ - POS

A few selection of caribbean foods limit the pasta dish etc

Related info for your journey

Find useful and relevant information for your journey from Key Largo to Saint Lucia. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Key Largo to Saint Lucia?

    Airlines like American Airlines, Delta, and Caribbean Airlines fly from Key Largo to Saint Lucia in about 3h 42m. The time it takes to get you to your destination can typically vary by up to 19h 43m. There are 1504 mi between Key Largo and Saint Lucia. Both multi-stop and nonstop flights can be found to your destination and back.

  • What are the cheapest flights from Key Largo to Saint Lucia?

    While on average a flight from Key Largo to Saint Lucia is generally $535, our data shows the cheapest flight currently is $308. When looking at the most popular route, (Miami - Castries Hewanorra), you can expect to pay $507 for that flight.

  • Can I find deals for flights from Key Largo to Saint Lucia that include hotel bookings?

    Yes. In addition to deals on Key Largo to Saint Lucia flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Key Largo to Saint Lucia?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Key Largo to Saint Lucia.

  • Can I find deals for business class flights from Key Largo to Saint Lucia?

    Yes. Cheapflights offers flight deals from Key Largo to Saint Lucia 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 Saint Lucia?

    Currently, February is the cheapest month in which you can book a flight from Key Largo to Saint Lucia (average of $445). Flying from Key Largo to Saint Lucia in July is currently the most expensive (average of $608). 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 Saint Lucia

See prices for flight routes from nearby airports that may be better suited for you.
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Top 3 airlines flying from Key Largo to Saint Lucia

Discover the top 3 airlines that operate flights from Key Largo to Saint Lucia. 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 October 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$458Average$871FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$479Average$669FlexibilityNo cancel feeOn-time71%
Caribbean AirlinesCheapest$554Average$685FlexibilityNo cancel feeOn-timeN/A

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