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Saint Thomas Island

$81+ Cheap flights from Key Largo, FL to Saint Thomas Island (STT)

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 9/19. Fares are subject to change and may not be available on all flights or dates of travel.
MIA — STT
Jun 17 — Jun 241
Tue 6/17
Tue 6/24
1 adult, Economy
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Cheapflights Tip: The best prices from Key Largo to Saint Thomas Island Cyril E King are usually found in October or September, booked 35 days in advance, depart on a Tuesday or Thursday and return on a Friday

Cheap flight deals from Key Largo to Saint Thomas Island

Keep the following information in mind while searching for Key Largo to Saint Thomas Island flight deals. Data was last updated June 12, 2025.

Round-trip from

$192
(Priceline)

One-way from

$98
(Priceline)

Popular in

May

Cheapest in

October

Average price

$490
From Key Largo to Saint Thomas Island Cyril E King
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One-way flight from Key Largo to Saint Thomas Island Cyril E King
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Highest demand for flights based on searches. 19% potential increase in price ($94 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($14 potential savings vs. average RT price).
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Average for round-trip flights in June 2025
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Find flight deals from Key Largo to Saint Thomas Island

Cheapest flights from Key Largo to Saint Thomas Island
Explore the most affordable flight options available from Key Largo to Saint Thomas Island. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 12, 2025.

This Priceline deal was found by Cheapflights users on 6/12. 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.
Fri 10/315:51 pmMIA - STT
1 stop18h 36mFrontier
Sat 11/81:47 pmSTT - MIA
1 stop23h 05mFrontier
Deal found 6/12$153
This Trip.com deal was found by Cheapflights users on 6/10. 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.
Fri 9/195:30 amMIA - STT
1 stop12h 00mMultiple Airlines
Sun 9/216:05 pmSTT - MIA
1 stop6h 24mMultiple Airlines
Deal found 6/10$331
This FlightHub deal was found by Cheapflights users on 6/12. 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.
Tue 7/87:20 pmMIA - STT
2 stops17h 10mSpirit Airlines
Tue 7/151:25 pmSTT - MIA
2 stops21h 24mSpirit Airlines
Deal found 6/12$334
This American Airlines deal was found by Cheapflights users on 6/11. 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.
Thu 9/41:16 pmMIA - STT
Nonstop2h 44mAmerican Airlines
Mon 9/85:10 pmSTT - MIA
Nonstop3h 01mAmerican Airlines
Deal found 6/11$340
This Delta deal was found by Cheapflights users on 6/11. 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.
Wed 8/137:30 amMIA - STT
1 stop6h 40mDelta
Mon 8/183:23 pmSTT - MIA
1 stop9h 01mDelta
Deal found 6/11$374

Cheapflights Fare Finder

Customize your flight search to find flights from Key Largo to Saint Thomas Island 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 June 12, 2025.
Use the filters below to find and compare flights from Key Largo to Saint Thomas Island that are best for you.

Fly from

Key Largo

Fly to

Saint Thomas Island

Route

Depart

Return

Price

MiamiSaint Thomas Island

MIA - STT

MIASTT

Miami

Fri 10/31

5:51 pm-12:27 pm

1 stop18h 36m

Saint Thomas Island Cyril E King

Sat 11/8

1:47 pm-11:52 am

1 stop23h 05m

$153

MiamiSaint Thomas Island

MIA - STT

MIASTT

Miami

Fri 9/19

5:30 am-5:30 pm

1 stop12h 00m

Saint Thomas Island Cyril E King

Sun 9/21

6:05 pm-12:29 am

1 stop6h 24m

$331

MiamiSaint Thomas Island

MIA - STT

MIASTT

Miami

Tue 7/8

7:20 pm-12:30 pm

2 stops17h 10m

Saint Thomas Island Cyril E King

Tue 7/15

1:25 pm-10:49 am

2 stops21h 24m

$334

MiamiSaint Thomas Island

MIA - STT

MIASTT

Miami

Thu 9/4

1:16 pm-4:00 pm

Nonstop2h 44m

Saint Thomas Island Cyril E King

Mon 9/8

5:10 pm-8:11 pm

Nonstop3h 01m

$340

MiamiSaint Thomas Island

MIA - STT

MIASTT

Miami

Wed 8/13

7:30 am-2:10 pm

1 stop6h 40m

Saint Thomas Island Cyril E King

Mon 8/18

3:23 pm-12:24 am

1 stop9h 01m

$374

MiamiSaint Thomas Island

MIA - STT

MIASTT

Miami

Fri 9/19

5:51 pm-12:27 pm

1 stop18h 36m

$81

MiamiSaint Thomas Island

MIA - STT

MIASTT

Miami

Wed 7/9

11:54 am-3:10 pm

2 stops27h 16m

$166

MiamiSaint Thomas Island

MIA - STT

MIASTT

Miami

Fri 7/11

10:10 am-4:29 pm

1 stop6h 19m

$175

MiamiSaint Thomas Island

MIA - STT

MIASTT

Miami

Sun 8/3

5:30 am-3:00 pm

1 stop9h 30m

$278

MiamiSaint Thomas Island

MIA - STT

MIASTT

Miami

Sun 8/3

9:56 am-12:46 pm

Nonstop2h 50m

$283

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/11

Showing 1-10 of 11 results
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Best time to book a flight from Key Largo to Saint Thomas Island

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

How far ahead should I book a flight from Key Largo to Saint Thomas Island?

Use this chart to determine the optimal time to book a round-trip flight from Key Largo to Saint Thomas Island. Price data was last updated on June 9, 2025.

To ensure you get the cheapest price possible for a flight from Key Largo to Saint Thomas Island, you should look to book at least 35 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

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

Currently, September is the cheapest month in which you can book a flight from Key Largo to Saint Thomas Island (average of $433). Flying from Key Largo to Saint Thomas Island in June is currently the most expensive (average of $650). 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 STT?

Find hourly flight availability from Key Largo to Saint Thomas Island. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated June 12, 2025.

When flying from Key Largo to Saint Thomas Island, 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 Thomas Island?

Use this chart to determine the cheapest time to fly round-trip from Key Largo to Saint Thomas Island. Price data was last updated on December 16, 2024.

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

Reviews of airlines servicing Saint Thomas Island

Get insights into the airlines that provide service to Saint Thomas Island. 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 Thomas Island. Reviews last updated June 12, 2025.
Read reviews from past customers who have flown Delta, United Airlines and American Airlines from Key Largo to Saint Thomas Island. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,946 reviews

Crew

8.5

Overall

8.0

Food

7.3

Comfort

7.9

Entertainment

7.9

Boarding

8.2

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
7,946 reviews
Delta
8.0
Very good
7,946 reviews

Crew

8.5

Overall

8.0

Food

7.3

Comfort

7.9

Entertainment

7.9

Boarding

8.2

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
8,790 reviews
Delta
8.0
Very good
7,946 reviews

Crew

8.5

Overall

8.0

Food

7.3

Comfort

7.9

Entertainment

7.9

Boarding

8.2

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
7,946 reviews

Crew

8.5

Overall

8.0

Food

7.3

Comfort

7.9

Entertainment

7.9

Boarding

8.2

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.
Spirit Airlines
6.3
Okay
8,052 reviews
Delta
8.0
Very good
7,946 reviews

Crew

8.5

Overall

8.0

Food

7.3

Comfort

7.9

Entertainment

7.9

Boarding

8.2

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.
Frontier
6.0
Okay
3,295 reviews
Delta
8.0
Very good
7,946 reviews

Crew

8.5

Overall

8.0

Food

7.3

Comfort

7.9

Entertainment

7.9

Boarding

8.2

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 Saint Thomas Island. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly into for flights to Saint Thomas Island from Key Largo?

    Saint Thomas Island Cyril E King (STT) is the airport you will fly into if you book a flight from Key Largo to Saint Thomas Island. You should not have trouble finding flights to Cyril E King from Key Largo; the airport handles an average of 2 inbound flights from Key Largo per day. You should also have plenty of airline options to choose from since 4 airlines have flights to the Saint Thomas Island airport from Key Largo. It is only a 2.8 mi journey from Cyril E King (STT) to Saint Thomas Island’s city center.

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

    The cheapest airline one-way is Frontier, with whom users have recently found tickets for as low as $98. However, be on the lookout for offers from Spirit Airlines and Delta, as they are both options that can get you from Key Largo to Saint Thomas Island for a low price.

  • What are the most reliable airlines from Key Largo to Saint Thomas Island?

    The top 3 most reliable airlines when flying from Key Largo to Saint Thomas Island are British Airways (89%), American Airlines (85%) and Qatar Airways (83%).

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

    Looking for the cheapest flight from Key Largo to Saint Thomas Island? While on average our users pay $418, our data indicates the cheapest price to be $263. The most popular route (Miami - Saint Thomas Island Cyril E King), is priced around $287.

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

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

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

    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 Thomas Island.

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

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

    Currently, September is the cheapest month in which you can book a flight from Key Largo to Saint Thomas Island (average of $433). Flying from Key Largo to Saint Thomas Island in June is currently the most expensive (average of $650). 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

Traveling to a place near Key Largo?

Book flights to Key Largo if you plan to visit one of these locations
St. John

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Alternative routes for Key Largo to Saint Thomas Island

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Top 4 airlines flying from Key Largo to Saint Thomas Island

Discover the top 4 airlines that operate flights from Key Largo to Saint Thomas Island. 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 June 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$94Average$160FlexibilityNo cancel feeOn-time62%
Spirit AirlinesCheapest$110Average$222FlexibilityNo cancel feeOn-time65%
American AirlinesCheapest$148Average$499FlexibilityNo cancel feeOn-time71%
JetBlueCheapest$197Average$431FlexibilityNo cancel feeOn-time62%

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