$80 Cheap Flights from St. Louis (STL) to Miami (MIA)

View $80 flight on Sun, Nov 2, 2025Opens in a new window

Popular airlines from St. Louis Lambert Intl. Airport (STL) to Miami Intl. Airport (MIA)

Cheap Flights from St. Louis to Miami (STL-MIA)

Prices were available within the past 7 days and start at $80 for one-way flights and $138 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Spirit Airlines
Sun, Oct 26 - Sat, Nov 8
STL
St. Louis
MIA
Miami
$138 Roundtrip, found 1 day ago
$138
Roundtrip
found 1 day ago
Select Spirit Airlines flight, departing Sun, Oct 26 from St. Louis to Miami, returning Sat, Nov 8, priced at $138 found 1 day ago
Spirit Airlines
Sun, Oct 19 - Sun, Oct 26
STL
St. Louis
MIA
Miami
$159 Roundtrip, found 2 hours ago
$159
Roundtrip
found 2 hours ago
Select Spirit Airlines flight, departing Sun, Oct 19 from St. Louis to Miami, returning Sun, Oct 26, priced at $159 found 2 hours ago
Spirit Airlines
Thu, Oct 16 - Sat, Oct 25
STL
St. Louis
MIA
Miami
$161 Roundtrip, found 4 days ago
$161
Roundtrip
found 4 days ago
Select Spirit Airlines flight, departing Thu, Oct 16 from St. Louis to Miami, returning Sat, Oct 25, priced at $161 found 4 days ago
Southwest Airlines
Mon, Sep 8 - Mon, Sep 22
STL
St. Louis
MIA
Miami
$164 Roundtrip, found 4 days ago
$164
Roundtrip
found 4 days ago
Select Southwest Airlines flight, departing Mon, Sep 8 from St. Louis to Miami, returning Mon, Sep 22, priced at $164 found 4 days ago
Spirit Airlines
Sun, Oct 19 - Sat, Oct 25
STL
St. Louis
MIA
Miami
$168 Roundtrip, found 2 hours ago
$168
Roundtrip
found 2 hours ago
Select Spirit Airlines flight, departing Sun, Oct 19 from St. Louis to Miami, returning Sat, Oct 25, priced at $168 found 2 hours ago
Spirit Airlines
Fri, Oct 24 - Sat, Nov 8
STL
St. Louis
MIA
Miami
$169 Roundtrip, found 4 hours ago
$169
Roundtrip
found 4 hours ago
Select Spirit Airlines flight, departing Fri, Oct 24 from St. Louis to Miami, returning Sat, Nov 8, priced at $169 found 4 hours ago
Southwest Airlines
Mon, Sep 15 - Mon, Sep 22
STL
St. Louis
MIA
Miami
$177 Roundtrip, just found
$177
Roundtrip
just found
Select Southwest Airlines flight, departing Mon, Sep 15 from St. Louis to Miami, returning Mon, Sep 22, priced at $177 just found
American Airlines
Thu, Sep 18 - Sat, Sep 27
STL
St. Louis
MIA
Miami
$177 Roundtrip, just found
$177
Roundtrip
just found
Select American Airlines flight, departing Thu, Sep 18 from St. Louis to Miami, returning Sat, Sep 27, priced at $177 just found
Delta
Mon, Oct 13 - Thu, Oct 16
STL
St. Louis
MIA
Miami
$178 Roundtrip, found 3 hours ago
$178
Roundtrip
found 3 hours ago
Select Delta flight, departing Mon, Oct 13 from St. Louis to Miami, returning Thu, Oct 16, priced at $178 found 3 hours ago
United
Mon, Oct 6 - Thu, Oct 16
STL
St. Louis
MIA
Miami
$196 Roundtrip, found 15 hours ago
$196
Roundtrip
found 15 hours ago
Select United flight, departing Mon, Oct 6 from St. Louis to Miami, returning Thu, Oct 16, priced at $196 found 15 hours ago

Find the cheapest month to fly from St. Louis (STL) to Miami (MIA)

September is typically the cheapest month to fly

From $134 - $227 per traveler.

Graph displaying average flight prices per month

Flights from St. Louis (STL) to Miami (MIA)
Origin airport
Lambert-St. Louis Intl.
Destination airport
Miami Intl.
Airlines serving
Alaska Airlines, American Airlines, Delta, Frontier Airlines, Southwest Airlines, Spirit Airlines, United
Roundtrip price
$138
Distance
1069 mi
Average flight time
3 hours 49 mins

St. Louis to Miami Flights

The cheapest times to fly from St. Louis to Miami

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from St. Louis to Miami are during the month of October. You can find some of the cheapest flights from St. Louis to Miami with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from St. Louis to Miami

Sunday is one of the best days to book for cheap flights from St. Louis to Miami: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from St. Louis to Miami

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from St. Louis to Miami in 2025. You can also book with separate airlines for your outbound and return journeys, from $80 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap St. Louis to Miami flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your St. Louis to Miami airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Frequently asked questions

How much does a flight from Lambert-St. Louis Intl. Airport (STL) to Miami Intl. Airport (MIA) cost?
You can find cheap return fares from Lambert-St. Louis Intl. Airport (STL) to Miami Intl. Airport (MIA) starting from $139. Reserve your seat and start your adventure. This information is based on the cheapest price found on Expedia for this return journey departing within the next three months. This airfare is for a American Airlines flight leaving STL on August 7 2025 and touching down at MIA. The price was last updated on July 12 2025 and has not changed since.
What is the cheapest month to fly from STL to MIA?
The cheapest flights from STL to MIA are usually during off-peak season, when demand is lower. To save money, avoid flying during public holidays, school breaks and major local events.
Which airlines fly direct from Lambert-St. Louis Intl. Airport (STL) to Miami Intl. Airport (MIA)?
Take a direct flight with American Airlines and fly straight from Lambert-St. Louis Intl. Airport (STL) to Miami Intl. Airport (MIA).
What is the cheapest airline that flies from STL to MIA?
With prices as low as $68 for a one-way journey from STL to MIA, Southwest Airlines is currently the cheapest airline for this route. This fare is based on the lowest price found on Expedia departing within the next three months. The flight takes off from STL on August 25 2025. Prices were last updated on July 12 2025 and have not changed since.
How many flights per day from Lambert-St. Louis Intl. Airport (STL) to Miami Intl. Airport (MIA)?
With, on average, 3 direct flights that operate from Lambert-St. Louis Intl. Airport (STL) to Miami Intl. Airport (MIA) every day, you'll be on your way in no time.
What are the most popular departure times for flights from Lambert-St. Louis Intl. Airport (STL) to Miami Intl. Airport (MIA)?
The 5 AM departures from STL to MIA are typically the busiest. Prices can be higher for these popular slots. If you want to save on your trip, pick a less crowded time to fly.
What day of the week has the most flights from STL to MIA?
If you travel on a Saturday, you'll get the greatest range of options for flights from Lambert-St. Louis Intl. Airport (STL) to Miami Intl. Airport (MIA).
What is the earliest flight from Lambert-St. Louis Intl. Airport (STL) to Miami Intl. Airport (MIA)?
Catch the earliest flight at around 5:10AM UTC-6, leaving from Lambert-St. Louis Intl. Airport (STL). You'll be traveling for around 2h 53m, landing at Miami Intl. Airport (MIA) at approximately 9:03AM UTC-5.
How long does it take to fly from Lambert-St. Louis Intl. Airport (STL) to Miami Intl. Airport (MIA)?
The average flight time from STL to MIA is 2 hours and 49 minutes, covering a distance of 1,050 mi.
What is the best time to fly from Lambert-St. Louis Intl. Airport (STL) to Miami Intl. Airport (MIA)?
To touch down at Miami Intl. Airport (MIA) without delays, pick a flight that leaves from Lambert-St. Louis Intl. Airport (STL) before 3 PM. The likelihood of cancellations is 22% higher, on average, for departures after this hour.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
What airports do you fly into for Miami from Lambert-St. Louis Intl. Airport (STL)?
Take a direct flight from Lambert-St. Louis Intl. Airport (STL) to Miami and arrive at Miami Intl. Airport (MIA). Another convenient arrival point to this destination is Fort Lauderdale - Hollywood Intl. Airport (FLL).
Is it cheaper to buy a plane ticket from Lambert-St. Louis Intl. Airport (STL) to Miami Intl. Airport (MIA) last-minute?
Last-minute bookings from STL to MIA are generally more expensive. For the lowest prices, start searching for flights early. That being said, if you're flexible with your travel dates, it's possible to score a cheap fare right before your trip.
Is it cheaper to book a STL to MIA flight and hotel package?
You'll typically save money by booking a STL to MIA flight and hotel package compared to booking separately. In fact, you could save hundreds of dollars by bundling with Expedia. And it's simple to manage it all in one convenient place. Once you've chosen your preferred accommodations and flights, consider adding extras such as car rentals, tours and activities.
Can I cancel or change the date of my flight from Lambert-St. Louis Intl. Airport (STL) to Miami Intl. Airport (MIA)?
If you booked your STL to MIA flight in the last 24 hours, you may be able to cancel or modify it without fees. Depending on the airline and the type of fare you have, additional charges may apply for changes beyond that time. Airline policies and contact information can be found in your itinerary or confirmation email. Or, go to our Customer Service portal for further details.

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*Available to One Key members.