HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Saint Lucia

$274+ 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 6/16. Fares are subject to change and may not be available on all flights or dates of travel.
MIA — UVF
Apr 7 — Apr 141
Mon 4/7
Mon 4/14
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Key Largo to Saint Lucia with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

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 April 2, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$483
(American Airlines)

One-way from

$274
(Mytrip)

Popular in

December

Cheapest in

January

Average price

$609
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
High demand for flights, 0% potential price rise
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($24 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in April 2025
Search Deals

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 April 2, 2025.

This American Airlines deal was found by Cheapflights users on 4/1. 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.
Sun 8/1010:05 amMIA - UVF
Nonstop3h 48mAmerican Airlines
Thu 8/143:43 pmUVF - MIA
Nonstop3h 42mAmerican Airlines
Deal found 4/1$483
This Delta deal was found by Cheapflights users on 4/1. 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.
Fri 8/86:00 amMIA - UVF
1 stop8h 15mDelta
Wed 8/133:35 pmUVF - MIA
1 stop9h 25mDelta
Deal found 4/1$522
This Trip.com deal was found by Cheapflights users on 4/1. 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 6/123:10 pmMIA - SLU
1 stop20h 20mCaribbean Airlines
Mon 6/164:35 pmSLU - MIA
1 stop20h 40mCaribbean Airlines
Deal found 4/1$534
This JetBlue deal was found by Cheapflights users on 4/1. 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 JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/117:00 amMIA - UVF
1 stop30h 49mJetBlue
Sun 5/183:09 pmUVF - MIA
1 stop20h 37mJetBlue
Deal found 4/1$558
This Gotogate deal was found by Cheapflights users on 4/1. 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.
Mon 6/93:10 pmMIA - SLU
2 stops20h 15mMultiple Airlines
Sat 6/146:20 pmSLU - MIA
1 stop18h 55mMultiple Airlines
Deal found 4/1$656
This Mytrip deal was found by Cheapflights users on 4/1. 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.
Sun 5/187:55 amMIA - UVF
2 stops54h 20mMultiple Airlines
Tue 6/33:10 pmUVF - MIA
2 stops21h 56mMultiple Airlines
Deal found 4/1$690
This Priceline deal was found by Cheapflights users on 4/1. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/411:55 amMIA - UVF
1 stop26h 20mAir Canada
Tue 9/93:05 pmUVF - MIA
2 stops28h 29mAir Canada
Deal found 4/1$712

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 April 2, 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

Sun 8/10

10:05 am-1:53 pm

Nonstop3h 48m

Castries Hewanorra

Thu 8/14

3:43 pm-7:25 pm

Nonstop3h 42m

$483

MiamiCastries

MIA - UVF

MIAUVF

Miami

Fri 8/8

6:00 am-2:15 pm

1 stop8h 15m

Castries Hewanorra

Wed 8/13

3:35 pm-1:00 am

1 stop9h 25m

$522

MiamiCastries

MIA - SLU

MIASLU

Miami

Thu 6/12

3:10 pm-11:30 am

1 stop20h 20m

Castries George F. L. Charle

Mon 6/16

4:35 pm-1:15 pm

1 stop20h 40m

$534

MiamiCastries

MIA - UVF

MIAUVF

Miami

Sun 5/11

7:00 am-1:49 pm

1 stop30h 49m

Castries Hewanorra

Sun 5/18

3:09 pm-11:46 am

1 stop20h 37m

$558

MiamiCastries

MIA - SLU

MIASLU

Miami

Mon 6/9

3:10 pm-11:25 am

2 stops20h 15m

Castries George F. L. Charle

Sat 6/14

6:20 pm-1:15 pm

1 stop18h 55m

$656

MiamiCastries

MIA - UVF

MIAUVF

Miami

Sun 5/18

7:55 am-2:15 pm

2 stops54h 20m

Castries Hewanorra

Tue 6/3

3:10 pm-1:06 pm

2 stops21h 56m

$690

MiamiCastries

MIA - UVF

MIAUVF

Miami

Thu 9/4

11:55 am-2:15 pm

1 stop26h 20m

Castries Hewanorra

Tue 9/9

3:05 pm-7:34 pm

2 stops28h 29m

$712

MiamiCastries

MIA - UVF

MIAUVF

Miami

Mon 6/16

7:00 am-2:15 pm

2 stops31h 15m

$274

MiamiCastries

MIA - SLU

MIASLU

Miami

Sun 5/11

3:10 pm-3:50 pm

1 stop24h 40m

$302

MiamiCastries

MIA - UVF

MIAUVF

Miami

Sun 5/11

10:09 am-1:34 pm

Nonstop3h 25m

$304

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/1

Showing 1-10 of 14 results
1
2

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, January is the cheapest month in which you can book a flight from Key Largo to Saint Lucia (average of $556). Flying from Key Largo to Saint Lucia in December is currently the most expensive (average of $730). 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 April 2, 2025.

When flying from Key Largo to Saint Lucia, 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 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 Wednesday mornings 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.

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 April 2, 2025.
To help decide which airline to fly from Key Largo to Saint Lucia, see what other customers have to say about Caribbean Airlines, Delta and JetBlue. 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.
Caribbean Airlines
8.2
Very good
149 reviews

Entertainment

6.8

Overall

8.2

Crew

8.5

Boarding

8.2

Comfort

7.9

Food

6.8

Reviews

1 / 9
6.0
Good

Anonymous,Mar 2025

JFK - GEO

Air hostesses were friendly. There should be more options for tea.
Caribbean Airlines
8.2
Very good
149 reviews
Caribbean Airlines
8.2
Very good
149 reviews

Entertainment

6.8

Overall

8.2

Crew

8.5

Boarding

8.2

Comfort

7.9

Food

6.8

Reviews

1 / 9
6.0
Good

Anonymous,Mar 2025

JFK - GEO

Air hostesses were friendly. There should be more options for tea.
Delta
8.0
Very good
7,898 reviews
Caribbean Airlines
8.2
Very good
149 reviews

Entertainment

6.8

Overall

8.2

Crew

8.5

Boarding

8.2

Comfort

7.9

Food

6.8

Reviews

1 / 9
6.0
Good

Anonymous,Mar 2025

JFK - GEO

Air hostesses were friendly. There should be more options for tea.
JetBlue
7.3
Good
2,922 reviews
Caribbean Airlines
8.2
Very good
149 reviews

Entertainment

6.8

Overall

8.2

Crew

8.5

Boarding

8.2

Comfort

7.9

Food

6.8

Reviews

1 / 9
6.0
Good

Anonymous,Mar 2025

JFK - GEO

Air hostesses were friendly. There should be more options for tea.
American Airlines
7.2
Good
10,000 reviews
Caribbean Airlines
8.2
Very good
149 reviews

Entertainment

6.8

Overall

8.2

Crew

8.5

Boarding

8.2

Comfort

7.9

Food

6.8

Reviews

1 / 9
6.0
Good

Anonymous,Mar 2025

JFK - GEO

Air hostesses were friendly. There should be more options for tea.
WestJet
7.2
Good
2,789 reviews
Caribbean Airlines
8.2
Very good
149 reviews

Entertainment

6.8

Overall

8.2

Crew

8.5

Boarding

8.2

Comfort

7.9

Food

6.8

Reviews

1 / 9
6.0
Good

Anonymous,Mar 2025

JFK - GEO

Air hostesses were friendly. There should be more options for tea.

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.

  • What are the cheapest airlines to fly from Key Largo to Saint Lucia one-way?

    $302 is the cheapest one-way deal found within the past few days, from Caribbean Airlines. You may also be able to find cheap deals on American Airlines and Delta, with prices starting from $304 and $308, respectively.

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

    While on average a flight from Key Largo to Saint Lucia is generally $640, our data shows the cheapest flight currently is $303. When looking at the most popular route, (Miami - Castries Hewanorra), you can expect to pay $497 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, January is the cheapest month in which you can book a flight from Key Largo to Saint Lucia (average of $556). Flying from Key Largo to Saint Lucia in December is currently the most expensive (average of $730). 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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Key Largo to Saint Lucia

See prices for flight routes from nearby airports that may be better suited for you.
Orlando to Luis Munoz Marin Intl flights
Fort Lauderdale to Luis Munoz Marin Intl flights
Tampa to Luis Munoz Marin Intl flights
Miami to Luis Munoz Marin Intl flights
Orlando to Punta Cana flights
Orlando to Montego Bay flights
Miami to Nassau flights
Orlando to Santo Domingo flights
Fort Lauderdale to Montego Bay flights
Miami to Punta Cana flights
Fort Lauderdale to Punta Cana flights
Fort Lauderdale to Santo Domingo flights
Miami to Santo Domingo flights
Orlando to Ponce flights
Miami to Montego Bay flights
Fort Lauderdale to Kingston flights
Fort Lauderdale to Nassau flights
Orlando to Saint Thomas Island flights
Miami to Oranjestad flights
Orlando to Aguadilla flights
Miami to Havana flights
Miami to Santiago de los Caballeros flights
Miami to Castries flights
Jacksonville to Luis Munoz Marin Intl flights
Orlando to Nassau flights
Miami to Providenciales flights
Fort Lauderdale to Saint Thomas Island flights
Miami to Simpson Bay flights
Miami to Port of Spain flights
Orlando to Oranjestad flights
Orlando to Santiago de los Caballeros flights
West Palm Beach to Luis Munoz Marin Intl flights
Miami to Saint Thomas Island flights
Miami to Willemstad flights
Tampa to Punta Cana flights
Miami to Bridgetown flights
Fort Lauderdale to Marsh Harbour flights
Miami to Kingston flights
Orlando to Simpson Bay flights
Tampa to Nassau flights
Tampa to Saint Thomas Island flights
Miami to George Town flights
Miami to Castries flights
Miami to Cap Haitien flights
Fort Lauderdale to Santiago de los Caballeros flights
Tampa to Montego Bay flights
Miami to St. George's flights
Jacksonville to Montego Bay flights
Tampa to Santo Domingo flights
Pensacola to Luis Munoz Marin Intl flights

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 April 2, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$393Average$616FlexibilityNo cancel feeOn-time71%
DeltaCheapest$475Average$725FlexibilityNo cancel feeOn-timeN/A
Caribbean AirlinesCheapest$577Average$714FlexibilityNo cancel feeOn-timeN/A

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.