What airlines fly to Florida Keys?

American Airlines, Delta and United Airlines are the top three most popular airlines that fly to Florida Keys from St. Louis according to our data. American Airlines is the first choice among our users, with 68% of people opting to fly with this airline when traveling to Florida Keys. Keep in mind that there are 3 different airlines that fly to Florida Keys on a routine basis, so you have a few additional options to choose from.

How many flights depart from St. Louis to Florida Keys on average per week?

As of August 2026, there are 28 flights per week flying from St. Louis to Florida Keys. The most common day of the week flights depart is Fri, with 25% of flights taking off on this day.

What is the cheapest airline that flies from Lambert-St Louis to Florida Keys?

Southwest, Delta, and United Airlines are the most popular carriers operating from Lambert-St Louis to Florida Keys

When did momondo last update prices for flights from Lambert-St Louis Airport to Florida Keys?

Prices for flights from Lambert-St Louis Airport to Florida Keys were last updated today.

How many operators does momondo search for flights from Lambert-St Louis Airport to Florida Keys?

As of August 2026, there are 6 operators available to choose from for flights from Lambert-St Louis Airport to Florida Keys.

How old do you have to be to fly from Lambert-St Louis Airport to Florida Keys?

Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Lambert-St Louis Airport to Florida Keys.

What documentation or ID do you need to fly to Florida Keys?

The required travel and health documents for your Florida Keys trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Florida Keys. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

$60 Cheap Flights from St. Louis to Florida Keys in 2026

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from St. Louis to Florida Keys

Round-trip

One-way

Last minute

Direct

Cheap round-trip flights

Enter your travel dates to find the best prices.

10:35 am - 12:36 pmSTL Lambert-St Louis-EYW Key West

25h 01m2 stops Atlanta Hartsfield-Jackson Tampa

8:25 am - 7:39 pmEYW Key West-STL Lambert-St Louis

12h 14m1 stop Orlando Sanford Intl

$220Multiple Airlines

Mon, Nov 9 - Fri, Nov 13

6:17 pm - 9:24 amSTL Lambert-St Louis-EYW Key West

38h 07m2 stops Atlanta Hartsfield-Jackson Tampa

10:59 am - 4:24 pmEYW Key West-STL Lambert-St Louis

6h 25m1 stop Orlando

$238Multiple Airlines

Mon, Sep 7 - Thu, Sep 17

6:50 am - 1:35 pmSTL Lambert-St Louis-MIA Miami

5h 45m1 stop Dallas Love Field

6:20 am - 11:35 amMIA Miami-STL Lambert-St Louis

6h 15m1 stop Baltimore/Washington

$272Southwest

Sat, Aug 29 - Mon, Aug 31

2:59 pm - 12:52 amSTL Lambert-St Louis-MIA Miami

8h 53m1 stop Atlanta Hartsfield-Jackson

6:15 am - 7:09 amMIA Miami-STL Lambert-St Louis

25h 54m1 stop Atlanta Hartsfield-Jackson

$272Frontier

Fri, Dec 11 - Tue, Dec 15

10:35 am - 6:22 pmSTL Lambert-St Louis-MIA Miami

6h 47m1 stop Atlanta Hartsfield-Jackson

7:20 am - 7:15 pmMIA Miami-STL Lambert-St Louis

12h 55m1 stop Denver Intl

$273Frontier

Sun, Oct 11 - Fri, Oct 16

6:00 am - 12:50 pmSTL Lambert-St Louis-MIA Miami

5h 50m1 stop Chicago O'Hare Intl

8:41 am - 10:45 amMIA Miami-STL Lambert-St Louis

3h 04mnonstop

$276American Airlines

Fri, Aug 28 - Mon, Aug 31

7:35 am - 3:41 pmSTL Lambert-St Louis-MIA Miami

7h 06m1 stop Charlotte Douglas

8:40 pm - 10:40 pmMIA Miami-STL Lambert-St Louis

3h 00mnonstop

$276American Airlines

Sun, Aug 30 - Wed, Sep 2

11:40 am - 9:05 pmSTL Lambert-St Louis-MIA Miami

8h 25m1 stop Baltimore/Washington

12:50 pm - 2:40 pmMIA Miami-STL Lambert-St Louis

2h 50mnonstop

$276Southwest

Fri, Sep 25 - Tue, Sep 29

12:00 pm - 5:14 pmSTL Lambert-St Louis-MIA Miami

4h 14m1 stop Atlanta Hartsfield-Jackson

6:00 am - 10:55 amMIA Miami-STL Lambert-St Louis

5h 55m1 stop Atlanta Hartsfield-Jackson

$286Delta

Tue, Oct 6 - Fri, Oct 9

5:23 pm - 1:07 amSTL Lambert-St Louis-MIA Miami

6h 44m1 stop Atlanta Hartsfield-Jackson

8:25 am - 2:33 pmMIA Miami-STL Lambert-St Louis

7h 08m1 stop Atlanta Hartsfield-Jackson

$286Delta

Sun, Aug 30 - Wed, Sep 2

Cheap last minute flights

Enter your travel dates to find the best prices.

8:08 pm - 5:51 amSTL Lambert-St Louis-MIA Miami

8h 43m1 stop Denver Intl

8:30 am - 8:57 amMIA Miami-STL Lambert-St Louis

25h 27m1 stop Atlanta Hartsfield-Jackson

$284Frontier

Tue, Aug 11 - Fri, Aug 14

8:08 pm - 5:51 amSTL Lambert-St Louis-MIA Miami

8h 43m1 stop Denver Intl

6:00 am - 7:23 pmMIA Miami-STL Lambert-St Louis

14h 23m1 stop Denver Intl

$288Frontier

Tue, Aug 11 - Sat, Aug 15

11:35 am - 3:29 pmSTL Lambert-St Louis-MIA Miami

2h 54mnonstop

8:41 am - 10:45 amMIA Miami-STL Lambert-St Louis

3h 04mnonstop

$369American Airlines

Fri, Aug 14 - Mon, Aug 17

5:00 am - 8:53 amSTL Lambert-St Louis-MIA Miami

2h 53mnonstop

8:41 am - 10:45 amMIA Miami-STL Lambert-St Louis

3h 04mnonstop

$369American Airlines

Mon, Aug 10 - Fri, Aug 14

12:30 pm - 4:10 pmSTL Lambert-St Louis-MIA Miami

2h 40mnonstop

12:50 pm - 2:40 pmMIA Miami-STL Lambert-St Louis

2h 50mnonstop

$434Southwest

Mon, Aug 10 - Wed, Aug 12

12:30 pm - 4:10 pmSTL Lambert-St Louis-MIA Miami

2h 40mnonstop

12:30 pm - 2:20 pmMIA Miami-STL Lambert-St Louis

2h 50mnonstop

$434Southwest

Mon, Aug 10 - Sat, Aug 15

11:00 am - 4:57 pmSTL Lambert-St Louis-MIA Miami

4h 57m1 stop Atlanta Hartsfield-Jackson

3:59 pm - 8:33 pmMIA Miami-STL Lambert-St Louis

5h 34m1 stop Atlanta Hartsfield-Jackson

$454Delta

Fri, Aug 14 - Sat, Aug 22

8:08 pm - 2:37 pmSTL Lambert-St Louis-EYW Key West

17h 29m2 stops Denver Intl Orlando

12:05 pm - 11:59 pmEYW Key West-STL Lambert-St Louis

12h 54m1 stop Orlando

$468Multiple Airlines

Thu, Aug 13 - Sun, Aug 16

9:15 am - 2:54 pmSTL Lambert-St Louis-MIA Miami

4h 39m1 stop Atlanta Hartsfield-Jackson

8:25 am - 2:33 pmMIA Miami-STL Lambert-St Louis

7h 08m1 stop Atlanta Hartsfield-Jackson

$477Delta

Thu, Aug 13 - Fri, Aug 14

4:09 pm - 2:37 pmSTL Lambert-St Louis-EYW Key West

21h 28m1 stop Orlando

12:05 pm - 11:59 pmEYW Key West-STL Lambert-St Louis

12h 54m1 stop Orlando

$518Multiple Airlines

Thu, Aug 13 - Sun, Aug 16

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Frontier flights from St. Louis to Florida Keys

Our best Frontier deals on St. Louis to Florida Keys flight tickets

Frontier

Aug 30

STL7:58 pmLambert-St Louis

7h 54m

1 stop

MIA4:52 amMiami

Sep 4

MIA8:10 amMiami

10h 12m

1 stop

STL5:22 pmLambert-St Louis

$273

Frontier

Aug 27

STL7:58 pmLambert-St Louis

7h 54m

1 stop

MIA4:52 amMiami

Aug 30

MIA8:10 amMiami

10h 12m

1 stop

STL5:22 pmLambert-St Louis

$274

Frontier

Sep 18

STL2:29 pmLambert-St Louis

5h 04m

1 stop

MIA8:33 pmMiami

Sep 20

MIA11:30 pmMiami

14h 40m

2 stops

STL1:10 pmLambert-St Louis

$275

American Airlines flights from St. Louis to Florida Keys

Our best American Airlines deals on St. Louis to Florida Keys flight tickets

American Airlines

Nov 7

STL6:15 pmLambert-St Louis

2h 50m

MIA10:05 pmMiami

Nov 15

MIA5:16 amMiami

6h 36m

1 stop

STL10:52 amLambert-St Louis

$276

American Airlines

Sep 11

STL2:11 pmLambert-St Louis

2h 46m

MIA5:57 pmMiami

Sep 14

MIA9:55 pmMiami

3h 04m

STL11:59 pmLambert-St Louis

$292

American Airlines

Oct 3

STL5:00 amLambert-St Louis

2h 44m

MIA8:44 amMiami

Oct 10

MIA7:54 pmMiami

3h 05m

STL9:59 pmLambert-St Louis

$297

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

St. LouisKey West

STL Lambert-St Louis - EYW Key West

STLEYW

Lambert-St Louis

Mon 11/9

10:35 am-12:36 pm

2 stops25h 01m

Key West

Fri 11/13

8:25 am-7:39 pm

1 stop12h 14m

$220

St. LouisKey West

STL Lambert-St Louis - EYW Key West

STLEYW

Lambert-St Louis

Mon 9/7

6:17 pm-9:24 am

2 stops38h 07m

Key West

Thu 9/17

10:59 am-4:24 pm

1 stop6h 25m

$238

St. LouisMiami

STL Lambert-St Louis - MIA Miami

STLMIA

Lambert-St Louis

Sat 8/29

6:50 am-1:35 pm

1 stop5h 45m

Miami

Mon 8/31

6:20 am-11:35 am

1 stop6h 15m

$272

St. LouisMiami

STL Lambert-St Louis - MIA Miami

STLMIA

Lambert-St Louis

Fri 12/11

2:59 pm-12:52 am

1 stop8h 53m

Miami

Tue 12/15

6:15 am-7:09 am

1 stop25h 54m

$272

St. LouisMiami

STL Lambert-St Louis - MIA Miami

STLMIA

Lambert-St Louis

Sun 10/11

10:35 am-6:22 pm

1 stop6h 47m

Miami

Fri 10/16

7:20 am-7:15 pm

1 stop12h 55m

$273

Quickest round-trip

St. LouisMiami

STL Lambert-St Louis - MIA Miami

STLMIA

Lambert-St Louis

Fri 8/28

6:00 am-12:50 pm

1 stop5h 50m

Miami

Mon 8/31

8:41 am-10:45 am

Nonstop3h 04m

$276

St. LouisMiami

STL Lambert-St Louis - MIA Miami

STLMIA

Lambert-St Louis

Sun 8/30

7:35 am-3:41 pm

1 stop7h 06m

Miami

Wed 9/2

8:40 pm-10:40 pm

Nonstop3h 00m

$276

St. LouisMiami

STL Lambert-St Louis - MIA Miami

STLMIA

Lambert-St Louis

Fri 9/25

11:40 am-9:05 pm

1 stop8h 25m

Miami

Tue 9/29

12:50 pm-2:40 pm

Nonstop2h 50m

$276

St. LouisMiami

STL Lambert-St Louis - MIA Miami

STLMIA

Lambert-St Louis

Tue 10/6

12:00 pm-5:14 pm

1 stop4h 14m

Miami

Fri 10/9

6:00 am-10:55 am

1 stop5h 55m

$286

St. LouisMiami

STL Lambert-St Louis - MIA Miami

STLMIA

Lambert-St Louis

Sun 8/30

5:23 pm-1:07 am

1 stop6h 44m

Miami

Wed 9/2

8:25 am-2:33 pm

1 stop7h 08m

$286

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

How to get the cheapest flight ticket from St. Louis to Florida Keys

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

Prices

Airlines

Other information

What is the cheapest month to fly to Florida Keys?

The month of October is another great option to travel to Florida Keys, with average flight prices from St. Louis averaging around $369.

What is the cheapest day to depart on your flight to Florida Keys?

The cheapest day to depart from St. Louis to Florida Keys is on a Monday when prices can be found for as low as $489. The most expensive day to fly to Florida Keys is Tuesday, with ticket prices averaging around $636.

What is the cheapest time of day to depart on your flight to Florida Keys?

According to our data, the cheapest time of day to fly to Florida Keys is at noon. momondo users have found flights departing from St. Louis to Florida Keys at noon for as low as $484. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. Flights in the afternoon are often more expensive with an average ticket price of $589.

How far in advance should I book a flight from St. Louis to Florida Keys?

You are more likely to see cheaper flights to Florida Keys from St. Louis when booking weeks ahead of your departure date. In general, you can expect to find flights to Florida Keys for around $407 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Florida Keys from St. Louis for as low as $342 on momondo.

Can stopping save me money on St. Louis to Florida Keys flights?

No. A direct flight is the cheapest option for a flight between St. Louis to Florida Keys.

Cheap St. Louis to Florida Keys flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from St. Louis to Florida Keys

Fastest flight time	2h 35m
Direct flights	Every day
Airports in Florida Keys	3 airports

The fastest flight from St. Louis to Florida Keys takes 2h 35m

Direct flights go from St. Louis to Florida Keys every day.

There are 3 airports in Florida Keys. From St. Louis there are direct flights to Miami (MIA).

Search flight deals

Frequently asked questions about flying from St. Louis to Florida Keys

When did momondo last update prices for flights from Lambert-St Louis Airport to Florida Keys?
Prices for flights from Lambert-St Louis Airport to Florida Keys were last updated today.
How many operators does momondo search for flights from Lambert-St Louis Airport to Florida Keys?
As of August 2026, there are 6 operators available to choose from for flights from Lambert-St Louis Airport to Florida Keys.
How old do you have to be to fly from Lambert-St Louis Airport to Florida Keys?
Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Lambert-St Louis Airport to Florida Keys.
What documentation or ID do you need to fly to Florida Keys?
The required travel and health documents for your Florida Keys trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Florida Keys. We recommend that you seek guidance from your airline or a reliable third party such as IATA.
What is the most popular plane model from St. Louis to Florida Keys?
momondo data reveals that the most frequently booked plane model on the route from St. Louis to Florida Keys is Boeing 737 MAX 8, representing 24.68% of all bookings. The subsequent popular models are Boeing 737-800 Passenger/BBJ2 (winglets) at 16.91%, Embraer 175 at 7.43%, and Airbus A319 at 6.86%.

Best airlines flying from St. Louis to Florida Keys

Compare and see reviews for airlines that fly from St. Louis to Florida Keys with momondo

Airline	Rating	Free Cancellation	Price
American Airlines	PriceFrom $222	Free Cancellation	Rating 7.1 11,892 reviews	Search American Airlines flights
Delta	PriceFrom $242	Free Cancellation	Rating 7.8 8,497 reviews	Search Delta flights
United Airlines	PriceFrom $292	Free Cancellation	Rating 7.4 10,089 reviews	Search United Airlines flights

Why use momondo?

Why should I use momondo to find a flight deal from St. Louis to Florida Keys?

Finding the right flight to Florida Keys from St. Louis is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to Florida Keys quick and easy, saving you time and money.

Can I find flights from St. Louis to Florida Keys with flexible booking policies on momondo?

Flights from St. Louis to Florida Keys with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

How can momondo help me find flights from St. Louis to Florida Keys?

Once all potential St. Louis to Florida Keys flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

I’m not ready to book a flight from St. Louis to Florida Keys right now. Can momondo alert me if prices change?

Of course. momondo tracks the price of St. Louis to Florida Keys flights. All you need is a valid email address and we will do the rest; it is that quick and easy.