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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 5/27. Fares are subject to change and may not be available on all flights or dates of travel.
MIA — UVF
Jan 17 — Jan 241
Sat 1/17
Sat 1/24
1 adult, Economy
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Cheap 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 December 18, 2025.

This Mytrip deal was found by Cheapflights users on 12/17. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/307:25 amMIA - UVF
1 stop31h 55mAir Canada
Mon 1/125:15 pmUVF - MIA
1 stop23h 06mAir Canada
Deal found 12/17$666
This Air Canada deal was found by Cheapflights users on 12/15. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/307:25 amMIA - UVF
1 stop31h 55mAir Canada
Thu 1/85:15 pmUVF - MIA
1 stop32h 01mAir Canada
Deal found 12/15$667
This SmartFares deal was found by Cheapflights users on 12/17. 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.
Tue 12/302:10 pmMIA - SLU
1 stop18h 20mCaribbean Airlines
Sun 1/117:10 pmSLU - MIA
1 stop18h 05mCaribbean Airlines
Deal found 12/17$768
This SmartFares deal was found by Cheapflights users on 12/17. 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.
Tue 12/302:10 pmMIA - SLU
1 stop18h 20mCaribbean Airlines
Mon 1/124:20 pmSLU - MIA
1 stop20h 55mCaribbean Airlines
Deal found 12/17$792
This FlightHub deal was found by Cheapflights users on 12/15. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/312:10 pmMIA - SLU
1 stop22h 00mCaribbean Airlines
Wed 1/710:15 amSLU - MIA
1 stop27h 00mCaribbean Airlines
Deal found 12/15$818
This American Airlines deal was found by Cheapflights users on 12/17. 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 12/308:25 amMIA - UVF
Nonstop3h 39mAmerican Airlines
Mon 1/125:02 pmUVF - MIA
Nonstop4h 08mAmerican Airlines
Deal found 12/17$863
This FlightHub deal was found by Cheapflights users on 12/15. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/312:10 pmMIA - SLU
1 stop22h 00mCaribbean Airlines
Thu 1/86:20 pmSLU - MIA
1 stop18h 55mCaribbean Airlines
Deal found 12/15$873
This Trip.com deal was found by Cheapflights users on 12/16. 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.
Sun 12/282:10 pmMIA - SLU
1 stop24h 25mCaribbean Airlines
Mon 1/54:20 pmSLU - MIA
1 stop20h 55mCaribbean Airlines
Deal found 12/16$891
This Trip.com deal was found by Cheapflights users on 12/15. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/182:10 pmMIA - SLU
1 stop24h 05mCaribbean Airlines
Thu 1/86:20 pmSLU - MIA
1 stop18h 55mCaribbean Airlines
Deal found 12/15$960
This SmartFares deal was found by Cheapflights users on 12/15. 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 SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/242:10 pmMIA - SLU
1 stop22h 00mCaribbean Airlines
Thu 1/86:20 pmSLU - MIA
1 stop18h 55mCaribbean Airlines
Deal found 12/15$961
This Caribbean Airlines deal was found by Cheapflights users on 12/16. 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 12/2812:30 amMIA - SLU
1 stop14h 05mCaribbean Airlines
Thu 1/16:20 pmSLU - MIA
1 stop18h 55mCaribbean Airlines
Deal found 12/16$963
This Trip.com deal was found by Cheapflights users on 12/15. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/2112:30 amMIA - SLU
1 stop14h 05mCaribbean Airlines
Wed 1/710:15 amSLU - MIA
1 stop27h 00mCaribbean Airlines
Deal found 12/15$964

Find 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 December 18, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$429
(American Airlines)

One-way from

$213
(SmartFares)

Popular in

July

Cheapest in

August

Average price

$765
Provider with most accurate pricing for Miami-Castries George F. L. Charle flight deals.
Search Deals
Provider most trusted by Cheapflights users for Miami-Castries George F. L. Charle flights.
Search Deals
From Key Largo to Saint Lucia
Search Deals
One-way flight from Key Largo to Saint Lucia
Search Deals
Highest demand for flights based on searches. 12% potential increase in price ($93 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($25 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
Search Deals

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 December 18, 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 1/19

11:18 am-4:02 pm

Nonstop3h 44m

Castries Hewanorra

Fri 1/23

2:46 pm-5:50 pm

Nonstop4h 04m

$429

MiamiCastries

MIA - UVF

MIAUVF

Miami

Mon 1/12

5:50 am-3:05 pm

1 stop8h 15m

Castries Hewanorra

Wed 1/21

4:25 pm-12:51 am

1 stop9h 26m

$436

MiamiCastries

MIA - UVF

MIAUVF

Miami

Mon 1/19

5:50 am-3:05 pm

1 stop8h 15m

Castries Hewanorra

Tue 1/20

4:25 pm-12:51 am

1 stop9h 26m

$443

MiamiCastries

MIA - UVF

MIAUVF

Miami

Wed 3/18

11:20 am-2:58 pm

Nonstop3h 38m

Castries Hewanorra

Mon 3/23

2:57 pm-7:04 pm

Nonstop4h 07m

$459

MiamiCastries

MIA - UVF

MIAUVF

Miami

Fri 2/6

5:50 am-3:05 pm

1 stop8h 15m

Castries Hewanorra

Mon 2/9

4:25 pm-12:51 am

1 stop9h 26m

$503

MiamiCastries

MIA - UVF

MIAUVF

Miami

Wed 5/6

10:05 am-1:50 pm

Nonstop3h 45m

Castries Hewanorra

Wed 5/13

4:05 pm-12:26 am

1 stop8h 21m

$533

MiamiCastries

MIA - SLU

MIASLU

Miami

Wed 1/28

2:10 pm-1:10 pm

1 stop22h 00m

Castries George F. L. Charle

Sun 2/1

7:10 pm-12:15 pm

1 stop18h 05m

$539

MiamiCastries

MIA - SLU

MIASLU

Miami

Thu 1/15

2:10 pm-3:15 pm

1 stop24h 05m

Castries George F. L. Charle

Thu 1/22

6:20 pm-12:15 pm

1 stop18h 55m

$539

MiamiCastries

MIA - SLU

MIASLU

Miami

Tue 1/27

2:10 pm-9:30 am

1 stop18h 20m

Castries George F. L. Charle

Fri 2/6

7:10 pm-12:15 pm

1 stop18h 05m

$541

MiamiCastries

MIA - UVF

MIAUVF

Miami

Sat 2/28

10:10 am-2:50 pm

Nonstop3h 40m

Castries Hewanorra

Sat 3/7

5:00 pm-8:10 pm

Nonstop4h 10m

$546

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/16

Showing 1-10 of 35 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, June is the cheapest month in which you can book a flight from Key Largo to Saint Lucia (average of $441). Flying from Key Largo to Saint Lucia in July is currently the most expensive (average of $612). 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 December 18, 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 28% versus a flight in the afternoon.

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 December 18, 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
210 reviews

Entertainment

6.6

Food

6.8

Crew

8.4

Boarding

8.0

Overall

8.0

Comfort

7.8

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
210 reviews
Caribbean Airlines
8.0
Very good
210 reviews

Entertainment

6.6

Food

6.8

Crew

8.4

Boarding

8.0

Overall

8.0

Comfort

7.8

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
8,005 reviews
Caribbean Airlines
8.0
Very good
210 reviews

Entertainment

6.6

Food

6.8

Crew

8.4

Boarding

8.0

Overall

8.0

Comfort

7.8

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
11,055 reviews
Caribbean Airlines
8.0
Very good
210 reviews

Entertainment

6.6

Food

6.8

Crew

8.4

Boarding

8.0

Overall

8.0

Comfort

7.8

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 popular is this Key Largo to Saint Lucia flight route?

    This flight path from Key Largo to Saint Lucia was viewed by 1 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 Saint Lucia?

    Airlines like American Airlines, Delta, and Caribbean Airlines fly from Key Largo to Saint Lucia in about 3h 44m. The time it takes to get you to your destination can typically vary by up to 18h 16m. 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 $523, our data shows the cheapest flight currently is $308. When looking at the most popular route, (Miami - Castries Hewanorra), you can expect to pay $443 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, June is the cheapest month in which you can book a flight from Key Largo to Saint Lucia (average of $441). Flying from Key Largo to Saint Lucia in July is currently the most expensive (average of $612). 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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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 December 18, 2025.
AirlineCheapestAverageFlexibilityOn-time
Caribbean AirlinesCheapest$443Average$685FlexibilityNo cancel feeOn-timeN/A
DeltaCheapest$458Average$1,012FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$482Average$684FlexibilityNo cancel feeOn-time71%

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