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Florida Keys

$69+ Cheap flights from St. Louis (STL) to Florida Keys

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 5/3. Fares are subject to change and may not be available on all flights or dates of travel.
STL — EYW
Mar 19 — Mar 261
Wed 3/19
Wed 3/26
1 adult, Economy
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Cheap flight deals from St. Louis to Florida Keys

Keep the following information in mind while searching for St. Louis to Florida Keys flight deals. Data was last updated March 14, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$238
(Delta)

One-way from

$69
(CheapOair)

Popular in

March

Cheapest in

September

Average price

$530
Provider with most accurate pricing for Lambert-St Louis-Miami flight deals.
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Provider most trusted by Cheapflights users for Lambert-St Louis-Miami flights.
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From Lambert-St Louis to Florida Keys
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One-way flight from Lambert-St Louis to Florida Keys
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Highest demand for flights based on searches. 10% potential increase in price ($46 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($13 potential savings vs. average RT price).
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Average for round-trip flights in March 2025
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Find flight deals from St. Louis to Florida Keys

Cheapest flights from St. Louis to Florida Keys
Explore the most affordable flight options available from St. Louis to Florida Keys. Find the lowest fares from popular airlines and budget airlines, with prices last updated on March 14, 2025.

This Delta deal was found by Cheapflights users on 3/11. 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.
Fri 9/511:51 amSTL - EYW
1 stop4h 24mDelta
Wed 9/107:00 amEYW - STL
1 stop4h 38mDelta
Deal found 3/11$238
This Frontier deal was found by Cheapflights users on 3/13. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/192:52 pmSTL - MIA
1 stop6h 12mFrontier
Sun 7/279:10 amMIA - STL
1 stop5h 39mFrontier
Deal found 3/13$240
This Mytrip deal was found by Cheapflights users on 3/13. 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 4/86:47 pmSTL - MIA
3 stops36h 06mSpirit Airlines
Mon 4/141:13 pmMIA - STL
2 stops29h 02mSpirit Airlines
Deal found 3/13$254
This American Airlines deal was found by Cheapflights users on 3/13. 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 4/245:35 amSTL - MIA
Nonstop2h 45mAmerican Airlines
Tue 4/298:15 pmMIA - STL
Nonstop3h 04mAmerican Airlines
Deal found 3/13$256
This Southwest deal was found by Cheapflights users on 3/13. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/126:40 pmSTL - MIA
Nonstop2h 40mSouthwest
Wed 4/167:55 amMIA - STL
Nonstop2h 55mSouthwest
Deal found 3/13$258
This Delta deal was found by Cheapflights users on 3/13. 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.
Tue 4/86:00 amSTL - MIA
1 stop5h 25mDelta
Fri 4/116:00 amMIA - STL
1 stop4h 36mDelta
Deal found 3/13$259
This Mytrip deal was found by Cheapflights users on 3/13. 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.
Sat 4/126:45 pmSTL - MIA
1 stop14h 57mMultiple Airlines
Wed 4/168:58 amMIA - STL
2 stops33h 17mMultiple Airlines
Deal found 3/13$263
This American Airlines deal was found by Cheapflights users on 3/12. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/225:45 amSTL - EYW
1 stop5h 37mAmerican Airlines
Tue 4/293:56 pmEYW - STL
1 stop7h 23mAmerican Airlines
Deal found 3/12$269
This Mytrip deal was found by Cheapflights users on 3/13. 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 4/136:10 pmSTL - EYW
2 stops13h 55mMultiple Airlines
Wed 4/165:23 pmEYW - STL
3 stops26h 18mMultiple Airlines
Deal found 3/13$346
This United Airlines deal was found by Cheapflights users on 3/12. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/76:30 amSTL - MIA
2 stops8h 52mUnited Airlines
Fri 4/117:00 amMIA - STL
1 stop6h 20mUnited Airlines
Deal found 3/12$360
This United Airlines deal was found by Cheapflights users on 3/13. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/86:30 amSTL - EYW
1 stop7h 34mUnited Airlines
Tue 4/156:45 pmEYW - STL
2 stops22h 02mUnited Airlines
Deal found 3/13$372

Find flights from St. Louis to Florida Keys within your budget

Customize your flight search to find flights from St. Louis to Florida Keys 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 March 14, 2025.

Fly from

St. Louis

Fly to

Florida Keys

Route

Depart

Return

Price

St. LouisMiami

STL - MIA

STLMIA

Lambert-St Louis

Sat 5/31

7:24 pm-6:30 am

1 stop10h 06m

Miami

Fri 6/6

6:00 am-9:12 am

1 stop28h 12m

$250

St. LouisMiami

STL - MIA

STLMIA

Lambert-St Louis

Tue 4/8

6:47 pm-7:53 am

3 stops36h 06m

Miami

Mon 4/14

1:13 pm-5:15 pm

2 stops29h 02m

$254

St. LouisMiami

STL - MIA

STLMIA

Lambert-St Louis

Thu 4/24

5:35 am-9:20 am

Nonstop2h 45m

Miami

Tue 4/29

8:15 pm-10:19 pm

Nonstop3h 04m

$256

St. LouisMiami

STL - MIA

STLMIA

Lambert-St Louis

Sat 4/12

6:40 pm-10:20 pm

Nonstop2h 40m

Miami

Wed 4/16

7:55 am-9:50 am

Nonstop2h 55m

$258

St. LouisMiami

STL - MIA

STLMIA

Lambert-St Louis

Tue 4/8

6:00 am-12:25 pm

1 stop5h 25m

Miami

Fri 4/11

6:00 am-9:36 am

1 stop4h 36m

$259

St. LouisMiami

STL - MIA

STLMIA

Lambert-St Louis

Sat 4/12

6:45 pm-10:42 am

1 stop14h 57m

Miami

Wed 4/16

8:58 am-5:15 pm

2 stops33h 17m

$263

St. LouisKey West

STL - EYW

STLEYW

Lambert-St Louis

Sat 4/5

9:18 am-6:46 pm

2 stops8h 28m

Key West

Wed 4/9

3:06 pm-7:23 pm

1 stop5h 17m

$274

St. LouisKey West

STL - EYW

STLEYW

Lambert-St Louis

Tue 4/8

1:05 pm-8:26 pm

1 stop6h 21m

Key West

Tue 4/15

1:35 pm-8:51 pm

1 stop8h 16m

$293

St. LouisKey West

STL - EYW

STLEYW

Lambert-St Louis

Sun 4/13

6:10 pm-9:05 am

2 stops13h 55m

Key West

Wed 4/16

5:23 pm-6:41 pm

3 stops26h 18m

$346

St. LouisMiami

STL - MIA

STLMIA

Lambert-St Louis

Mon 4/7

6:30 am-4:22 pm

2 stops8h 52m

Miami

Fri 4/11

7:00 am-12:20 pm

1 stop6h 20m

$360

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/13

Showing 1-10 of 21 results
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Best time to book a flight from St. Louis to Florida Keys

Have a flexible travel schedule? Discover the best time to fly to Florida Keys from St. Louis 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.

Travel insights for flights from St. Louis to Florida Keys

Get recent, data-driven insights about flights from St. Louis to Florida Keys including ideal travel times, pricing trends, and more.

What is the cheapest month to book a flight from St. Louis to Florida Keys?

Currently, August is the cheapest month in which you can book a flight from St. Louis to Florida Keys (average of $328). Flying from St. Louis to Florida Keys in March is currently the most expensive (average of $499). 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.

Rainfall in Florida Keys by month

Plan your trip to Florida Keys by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Florida Keys ranges from 1.6 - 9.9 inches per month. September is typically the wettest month, when rainfall can reach 9.9 in. January is typically the driest time to visit Florida Keys when rainfall is around 1.6 in.

Temperature in Florida Keys by month

Plan your trip to Florida Keys by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Florida Keys, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 84.2 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 68.0 F).

Reviews of airlines servicing Florida Keys

Get insights into the airlines that provide service to Florida Keys. 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 Florida Keys. Reviews last updated March 14, 2025.
Get a feel of what it's like to fly with Southwest, Delta and United Airlines from St. Louis to Florida Keys by reading reviews from past customers. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.1
Very good
4,292 reviews

Overall

8.1

Food

7.1

Crew

8.7

Boarding

8.2

Entertainment

7.6

Comfort

8.1

Reviews

1 / 20

8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.

Southwest
8.1
Very good
4,292 reviews
Southwest
8.1
Very good
4,292 reviews

Overall

8.1

Food

7.1

Crew

8.7

Boarding

8.2

Entertainment

7.6

Comfort

8.1

Reviews

1 / 20

8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.

Delta
8.0
Very good
7,944 reviews
Southwest
8.1
Very good
4,292 reviews

Overall

8.1

Food

7.1

Crew

8.7

Boarding

8.2

Entertainment

7.6

Comfort

8.1

Reviews

1 / 20

8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.

United Airlines
7.4
Good
8,623 reviews
Southwest
8.1
Very good
4,292 reviews

Overall

8.1

Food

7.1

Crew

8.7

Boarding

8.2

Entertainment

7.6

Comfort

8.1

Reviews

1 / 20

8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.

American Airlines
7.2
Good
10,000 reviews
Southwest
8.1
Very good
4,292 reviews

Overall

8.1

Food

7.1

Crew

8.7

Boarding

8.2

Entertainment

7.6

Comfort

8.1

Reviews

1 / 20

8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.

Spirit Airlines
6.3
Okay
7,894 reviews
Southwest
8.1
Very good
4,292 reviews

Overall

8.1

Food

7.1

Crew

8.7

Boarding

8.2

Entertainment

7.6

Comfort

8.1

Reviews

1 / 20

8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.

Related info for your journey

Find useful and relevant information for your journey from St. Louis to Florida Keys. 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 from for flights from St. Louis to Florida Keys?

    Located just 12.7 mi from the city center, Lambert-St Louis (STL) is the airport most travelers will use when flying to Florida Keys from St. Louis.

  • What are the cheapest airlines to fly from St. Louis to Florida Keys one-way?

    The cheapest airlines for a one-way flight from St. Louis to Florida Keys are Frontier ($69), American Airlines ($90), and Spirit Airlines ($98).

  • Can I find deals for flights from St. Louis to Florida Keys that include hotel bookings?

    Yes. In addition to deals on St. Louis to Florida Keys flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from St. Louis to Florida Keys?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from St. Louis to Florida Keys.

  • Can I find deals for business class flights from St. Louis to Florida Keys?

    Yes. Cheapflights offers flight deals from St. Louis to Florida Keys 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 St. Louis to Florida Keys?

    Currently, August is the cheapest month in which you can book a flight from St. Louis to Florida Keys (average of $328). Flying from St. Louis to Florida Keys in March is currently the most expensive (average of $499). 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 St. Louis to Florida Keys

See prices for flight routes from nearby airports that may be better suited for you.
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Top 3 airlines flying from St. Louis to Florida Keys

Discover the top 3 airlines that operate flights from St. Louis to Florida Keys. 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 March 14, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$236Average$442FlexibilityNo cancel feeOn-time71%
DeltaCheapest$237Average$484FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$268Average$557FlexibilityNo cancel feeOn-time69%
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