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$195+ 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 9/29. Fares are subject to change and may not be available on all flights or dates of travel.
MIA — UVF
Oct 16 — Oct 231
Thu 10/16
Thu 10/23
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 September 16, 2025.

Round-trip from

$493
(American Airlines)

One-way from

$195
(Mytrip)

Popular in

July

Cheapest in

August
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 ($99 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($28 potential savings vs. average RT price).
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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 September 16, 2025.

This Trip.com deal was found by Cheapflights users on 9/14. 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 11/62:10 pmMIA - SLU
1 stop20h 20mCaribbean Airlines
Thu 11/136:20 pmSLU - MIA
1 stop18h 55mCaribbean Airlines
Deal found 9/14$529
This SmartFares deal was found by Cheapflights users on 9/14. 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 11/122:10 pmMIA - SLU
1 stop22h 00mCaribbean Airlines
Sun 11/165:00 amSLU - MIA
1 stop8h 15mCaribbean Airlines
Deal found 9/14$533
This American Airlines deal was found by Cheapflights users on 9/14. 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.
Fri 12/1211:21 amMIA - UVF
Nonstop3h 32mAmerican Airlines
Fri 12/262:04 pmUVF - MIA
Nonstop4h 07mAmerican Airlines
Deal found 9/14$548
This American Airlines deal was found by Cheapflights users on 9/14. 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.
Mon 11/38:50 amMIA - UVF
Nonstop3h 29mAmerican Airlines
Thu 11/64:52 pmUVF - MIA
Nonstop3h 59mAmerican Airlines
Deal found 9/14$553
This Caribbean Airlines deal was found by Cheapflights users on 9/16. 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.
Fri 11/72:10 pmMIA - SLU
1 stop22h 00mCaribbean Airlines
Thu 11/136:20 pmSLU - MIA
1 stop18h 55mCaribbean Airlines
Deal found 9/16$553
This American Airlines deal was found by Cheapflights users on 9/16. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/108:50 amMIA - UVF
Nonstop3h 29mAmerican Airlines
Wed 11/194:52 pmUVF - MIA
Nonstop3h 59mAmerican Airlines
Deal found 9/16$554
This Mytrip deal was found by Cheapflights users on 9/15. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/207:52 pmMIA - UVF
2 stops18h 23mMultiple Airlines
Fri 10/243:10 pmUVF - MIA
2 stops26h 54mMultiple Airlines
Deal found 9/15$558
This FlightHub deal was found by Cheapflights users on 9/14. 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 10/304:25 pmMIA - UVF
1 stop23h 00mAir Canada
Mon 11/35:15 pmUVF - MIA
2 stops19h 44mAir Canada
Deal found 9/14$563
This Mytrip deal was found by Cheapflights users on 9/15. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/299:05 pmMIA - UVF
1 stop16h 45mMultiple Airlines
Sun 11/25:15 pmUVF - MIA
3 stops27h 28mMultiple Airlines
Deal found 9/15$569
This Air Canada deal was found by Cheapflights users on 9/16. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/292:20 pmMIA - UVF
2 stops23h 55mAir Canada
Fri 10/33:10 pmUVF - MIA
2 stops22h 10mAir Canada
Deal found 9/16$574
This Gotogate deal was found by Cheapflights users on 9/14. 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 10/163:10 pmMIA - SLU
1 stop23h 30mCaribbean Airlines
Wed 10/2210:15 amSLU - MIA
1 stop27h 00mCaribbean Airlines
Deal found 9/14$574
This SmartFares deal was found by Cheapflights users on 9/15. 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.
Sun 10/512:30 amMIA - SLU
1 stop15h 20mCaribbean Airlines
Sat 10/116:20 pmSLU - MIA
1 stop28h 10mCaribbean Airlines
Deal found 9/15$577

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 September 16, 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

Wed 3/4

6:00 am-3:04 pm

1 stop8h 04m

Castries Hewanorra

Wed 3/11

3:24 pm-9:26 am

1 stop18h 02m

$507

MiamiCastries

MIA - UVF

MIAUVF

Miami

Sun 2/8

6:00 am-3:04 pm

1 stop8h 04m

Castries Hewanorra

Thu 2/12

4:24 pm-12:57 am

1 stop9h 33m

$507

MiamiCastries

MIA - UVF

MIAUVF

Miami

Wed 3/4

6:00 am-3:04 pm

1 stop8h 04m

Castries Hewanorra

Tue 3/10

3:24 pm-12:57 am

1 stop9h 33m

$507

MiamiCastries

MIA - UVF

MIAUVF

Miami

Mon 2/16

6:00 am-3:04 pm

1 stop8h 04m

Castries Hewanorra

Thu 2/19

4:24 pm-9:26 am

1 stop18h 02m

$507

MiamiCastries

MIA - UVF

MIAUVF

Miami

Tue 3/10

6:00 am-2:04 pm

1 stop8h 04m

Castries Hewanorra

Wed 3/11

3:24 pm-12:57 am

1 stop9h 33m

$507

MiamiCastries

MIA - UVF

MIAUVF

Miami

Wed 2/18

6:00 am-3:04 pm

1 stop8h 04m

Castries Hewanorra

Thu 2/19

4:24 pm-9:26 am

1 stop18h 02m

$507

MiamiCastries

MIA - UVF

MIAUVF

Miami

Sun 3/8

10:00 am-1:30 pm

Nonstop3h 30m

Castries Hewanorra

Mon 3/16

2:20 pm-6:25 pm

Nonstop4h 05m

$518

MiamiCastries

MIA - UVF

MIAUVF

Miami

Thu 1/1

6:00 am-2:52 pm

1 stop7h 52m

Castries Hewanorra

Fri 1/9

4:50 pm-7:55 pm

Nonstop4h 05m

$523

MiamiCastries

MIA - SLU

MIASLU

Miami

Thu 11/6

2:10 pm-11:30 am

1 stop20h 20m

Castries George F. L. Charle

Thu 11/13

6:20 pm-12:15 pm

1 stop18h 55m

$529

MiamiCastries

MIA - UVF

MIAUVF

Miami

Wed 3/4

6:00 am-3:04 pm

1 stop8h 04m

Castries Hewanorra

Mon 3/16

3:24 pm-12:57 am

1 stop9h 33m

$532

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/15

Showing 1-10 of 41 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, 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 September 16, 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 Thursday 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.

Weekly flight availability from Key Largo to Saint Lucia

Explore weekly flight availability from Key Largo to Saint Lucia. 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 September 16, 2025.

The most flights from KE9 to LC0 are scheduled on a Monday (2 on average). You will have fewer flight options on Wednesday, which is when the least amount of flights are scheduled (1 on average).

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 September 16, 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
8.1
Very good
178 reviews

Entertainment

6.8

Boarding

8.1

Comfort

7.9

Overall

8.1

Crew

8.4

Food

6.8

Reviews

1 / 10
6.0
Good

Anonymous,Jul 2025

GEO - POS

The crew was welcoming and helpful. No entertainment no meal only a drink.
Caribbean Airlines
8.1
Very good
178 reviews
Caribbean Airlines
8.1
Very good
178 reviews

Entertainment

6.8

Boarding

8.1

Comfort

7.9

Overall

8.1

Crew

8.4

Food

6.8

Reviews

1 / 10
6.0
Good

Anonymous,Jul 2025

GEO - POS

The crew was welcoming and helpful. No entertainment no meal only a drink.
Delta
8.0
Very good
7,957 reviews
Caribbean Airlines
8.1
Very good
178 reviews

Entertainment

6.8

Boarding

8.1

Comfort

7.9

Overall

8.1

Crew

8.4

Food

6.8

Reviews

1 / 10
6.0
Good

Anonymous,Jul 2025

GEO - POS

The crew was welcoming and helpful. No entertainment no meal only a drink.
American Airlines
7.2
Good
10,000 reviews
Caribbean Airlines
8.1
Very good
178 reviews

Entertainment

6.8

Boarding

8.1

Comfort

7.9

Overall

8.1

Crew

8.4

Food

6.8

Reviews

1 / 10
6.0
Good

Anonymous,Jul 2025

GEO - POS

The crew was welcoming and helpful. No entertainment no meal only a drink.

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 Delta and Caribbean Airlines fly from Key Largo to Saint Lucia in about 8h 04m. The time it takes to get you to your destination can typically vary by up to 12h 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 $596, our data shows the cheapest flight currently is $333. 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, 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

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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 September 16, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$458Average$1,012FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$478Average$651FlexibilityNo cancel feeOn-time71%
Caribbean AirlinesCheapest$554Average$707FlexibilityNo cancel feeOn-timeN/A

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