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

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

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

As of July 2025, there are 17 flights per week flying from St. Louis to Florida Keys. The most common day of the week flights depart is Mon, with 18% of flights taking off on this day.

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 71% 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.

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 July 2025, 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.

$79 Cheap Flights from St. Louis to Florida Keys in 2025

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Find the cheapest flights from St. Louis to Florida Keys

Round-trip

One-way

Last minute

Direct

Cheap round-trip flights

5:23 am - 9:10 amSTL-MIA

2h 47mnonstop

10:01 pm - 11:56 pmMIA-STL

2h 55mnonstop

$159American Airlines

Find Deal

Tue, Oct 14 - Tue, Oct 21

5:26 am - 9:14 amSTL-MIA

2h 48mnonstop

10:09 pm - 11:59 pmMIA-STL

2h 50mnonstop

$174American Airlines

Find Deal

Sat, Aug 23 - Sat, Aug 30

2:30 pm - 9:18 amSTL-MIA

17h 48m1 stop

4:53 pm - 10:50 amMIA-STL

18h 57m1 stop

$192Spirit Airlines

Find Deal

Sun, Aug 31 - Sat, Sep 6

5:15 pm - 12:29 amSTL-MIA

6h 14m1 stop

6:00 am - 12:35 pmMIA-STL

7h 35m1 stop

$197Delta

Find Deal

Sat, Oct 25 - Sat, Nov 1

1:26 pm - 9:28 pmSTL-MIA

7h 02m1 stop

6:00 am - 12:31 pmMIA-STL

7h 31m1 stop

$203Delta

Find Deal

Sat, Aug 23 - Sat, Aug 30

9:45 am - 4:10 pmSTL-MIA

5h 25m1 stop

4:55 pm - 6:55 pmMIA-STL

3h 00mnonstop

$204Southwest

Find Deal

Wed, Nov 12 - Wed, Nov 19

2:30 pm - 9:18 amSTL-MIA

17h 48m1 stop

4:53 pm - 1:32 pmMIA-STL

21h 39m1 stop

$207Spirit Airlines

Find Deal

Sun, Aug 24 - Sat, Aug 30

7:29 pm - 6:30 amSTL-MIA

10h 01m1 stop

6:00 am - 1:59 pmMIA-STL

8h 59m1 stop

$218Frontier

Find Deal

Wed, Aug 13 - Sat, Aug 16

10:20 am - 2:05 pmSTL-MIA

2h 45mnonstop

7:10 am - 10:40 amMIA-STL

4h 30m1 stop

$219Southwest

Find Deal

Tue, Sep 9 - Thu, Sep 11

7:54 pm - 6:30 amSTL-MIA

9h 36m1 stop

6:45 am - 9:06 amMIA-STL

27h 21m1 stop

$225Frontier

Find Deal

Sat, Aug 30 - Sat, Sep 6

Frontier flights from St. Louis to Florida Keys

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

Frontier

Aug 13

STL7:29 pmLambert-St Louis

10h 01m

1 stop

MIA6:30 amMiami

Aug 16

MIA6:00 amMiami

8h 59m

1 stop

STL1:59 pmLambert-St Louis

$218

Find similar

Frontier

Aug 6

STL7:29 pmLambert-St Louis

10h 01m

1 stop

MIA6:30 amMiami

Aug 9

MIA6:00 amMiami

8h 59m

1 stop

STL1:59 pmLambert-St Louis

$219

Find similar

Frontier

Aug 9

STL7:29 pmLambert-St Louis

10h 01m

1 stop

MIA6:30 amMiami

Aug 12

MIA6:00 amMiami

28h 11m

1 stop

STL9:11 amLambert-St Louis

$225

Find similar

American Airlines flights from St. Louis to Florida Keys

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

American Airlines

Oct 14

STL5:23 amLambert-St Louis

2h 47m

MIA9:10 amMiami

Oct 21

MIA10:01 pmMiami

2h 55m

STL11:56 pmLambert-St Louis

$159

Find similar

American Airlines

Aug 23

STL5:26 amLambert-St Louis

2h 48m

MIA9:14 amMiami

Aug 30

MIA10:09 pmMiami

2h 50m

STL11:59 pmLambert-St Louis

$174

Find similar

American Airlines

Aug 20

STL5:26 amLambert-St Louis

2h 48m

MIA9:14 amMiami

Aug 27

MIA10:09 pmMiami

2h 50m

STL11:59 pmLambert-St Louis

$189

Find similar

Fly from

Fly to

Route

Depart

Return

Price

St. LouisMiami

STL - MIA

STLMIA

Lambert-St Louis

Tue 10/14

5:23 am-9:10 am

Nonstop2h 47m

Miami

Tue 10/21

10:01 pm-11:56 pm

Nonstop2h 55m

$159

St. LouisMiami

STL - MIA

STLMIA

Lambert-St Louis

Sat 8/23

5:26 am-9:14 am

Nonstop2h 48m

Miami

Sat 8/30

10:09 pm-11:59 pm

Nonstop2h 50m

$174

St. LouisMiami

STL - MIA

STLMIA

Lambert-St Louis

Sun 8/31

2:30 pm-9:18 am

1 stop17h 48m

Miami

Sat 9/6

4:53 pm-10:50 am

1 stop18h 57m

$192

St. LouisMiami

STL - MIA

STLMIA

Lambert-St Louis

Sat 10/25

5:15 pm-12:29 am

1 stop6h 14m

Miami

Sat 11/1

6:00 am-12:35 pm

1 stop7h 35m

$197

St. LouisMiami

STL - MIA

STLMIA

Lambert-St Louis

Sat 8/23

1:26 pm-9:28 pm

1 stop7h 02m

Miami

Sat 8/30

6:00 am-12:31 pm

1 stop7h 31m

$203

St. LouisMiami

STL - MIA

STLMIA

Lambert-St Louis

Wed 11/12

9:45 am-4:10 pm

1 stop5h 25m

Miami

Wed 11/19

4:55 pm-6:55 pm

Nonstop3h 00m

$204

St. LouisMiami

STL - MIA

STLMIA

Lambert-St Louis

Sun 8/24

2:30 pm-9:18 am

1 stop17h 48m

Miami

Sat 8/30

4:53 pm-1:32 pm

1 stop21h 39m

$207

St. LouisMiami

STL - MIA

STLMIA

Lambert-St Louis

Wed 8/13

7:29 pm-6:30 am

1 stop10h 01m

Miami

Sat 8/16

6:00 am-1:59 pm

1 stop8h 59m

$218

St. LouisMiami

STL - MIA

STLMIA

Lambert-St Louis

Tue 9/9

10:20 am-2:05 pm

Nonstop2h 45m

Miami

Thu 9/11

7:10 am-10:40 am

1 stop4h 30m

$219

St. LouisMiami

STL - MIA

STLMIA

Lambert-St Louis

Sat 8/30

7:54 pm-6:30 am

1 stop9h 36m

Miami

Sat 9/6

6:45 am-9:06 am

1 stop27h 21m

$225

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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 September is another great option to travel to Florida Keys, with average flight prices from St. Louis averaging around $360.

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 Wednesday when prices can be found for as low as $537. The most expensive day to fly to Florida Keys is Saturday, with ticket prices averaging around $589.

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 in the evening. momondo users have found flights departing from St. Louis to Florida Keys in the evening for as low as $482. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. Flights at noon are often more expensive with an average ticket price of $596.

How far in advance should I book a flight 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 $403 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 $350 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

Best Price Found	$79
Fastest flight time	2h 39m
Direct flights	Every day
Airports in Florida Keys	2 airports

The best one-way flight to Florida Keys from St. Louis in the past 72 hours is $79. The best round-trip flight deal from St. Louis to Florida Keys found on momondo in the last 72 hours is $159.

The fastest flight from St. Louis to Florida Keys takes 2h 39m

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

There are 2 airports near Florida Keys: Key West (EYW), Miami (MIA)

Search flight deals

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 July 2025, 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 737-800 Passenger/BBJ2 (winglets), representing 19.71% of all bookings. The subsequent popular models are Boeing 737 MAX 8 at 15.78%, Boeing 737-700 Passenger/BBJ1 (winglets) at 15.06%, and Embraer 175 at 7.27%.

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
Delta	PriceFrom $218	Free Cancellation	Rating 8.0 7,981 reviews	Search Delta flights
United Airlines	PriceFrom $245	Free Cancellation	Rating 7.4 8,900 reviews	Search United Airlines flights
American Airlines	PriceFrom $253	Free Cancellation	Rating 7.2 10,000 reviews	Search American 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.

An easier way to manage your Florida Keys trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

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Find better results for your trip to Florida Keys

Popular cities in Florida Keys

Flights to New Yorkfrom $39

Flights to Los Angelesfrom $37

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Flights to Chicagofrom $59

Flights to Orlandofrom $54

Flights to Las Vegasfrom $35

Flights to San Franciscofrom $49

Flights to Washington, D.C.from $49

Flights to Bostonfrom $77

Flights to Atlantafrom $29

Flights to Dallasfrom $55

Flights to Seattlefrom $93

Cheap flights from St. Louis to Florida Keys from $79

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from St. Louis to Florida Keys departing on 12/9. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

Big names and deals

Big names and deals

Filter for what you want

Filter for what you want

Trusted and free

Trusted and free

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Find the cheapest flights from St. Louis to Florida Keys

Cheap round-trip flights

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Cheap last minute flights

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Frontier flights from St. Louis to Florida Keys

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

American Airlines flights from St. Louis to Florida Keys

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

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Use the filters below to find and compare flights from St. Louis to Florida Keys that are best for you.

See travel insights to Florida Keys from

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

What is the cheapest month to fly to Florida Keys?

The month of September is another great option to travel to Florida Keys, with average flight prices from St. Louis averaging around $360.

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 Wednesday when prices can be found for as low as $537. The most expensive day to fly to Florida Keys is Saturday, with ticket prices averaging around $589.

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

How far in advance should I book a flight to Florida Keys?

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.

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

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

What airlines fly to Florida Keys?

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

As of July 2025, there are 17 flights per week flying from St. Louis to Florida Keys. The most common day of the week flights depart is Mon, with 18% of flights taking off on this day.

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

Best Price Found

Fastest flight time

Direct flights

Airports in Florida Keys

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

How many operators does momondo search 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?

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

What is the most popular plane model from St. Louis to Florida Keys?

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

Why use momondo?

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

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

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

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

An easier way to manage your Florida Keys trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

Find better results for your trip to Florida Keys

Popular cities in Florida Keys

Popular flights according to clicks in the last 7 days on momondo