$1,851 Cheap Flights from St. Louis (STL) to Mount Pleasant (MPN)

View $1,851 flight on Thu, Jul 10, 2025Opens in a new window

Popular airlines from St. Louis Lambert Intl. Airport (STL) to Mount Pleasant (MPN)

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Cheap Flights from St. Louis to Mount Pleasant (STL-MPN)

Prices were available within the past 7 days and start at $1,851 for one-way flights and $3,539 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

LATAM Airlines Group
Thu, Jul 10 - Sat, Jul 19
STL
St. Louis
MPN
Mount Pleasant
$3,539 Roundtrip, found 3 days ago
$3,539
Roundtrip
found 3 days ago
Select LATAM Airlines Group flight, departing Thu, Jul 10 from St. Louis to Mount Pleasant, returning Sat, Jul 19, priced at $3,539 found 3 days ago
LATAM Airlines Group
Thu, Jul 10 - Sat, Jul 12
STL
St. Louis
MPN
Mount Pleasant
$5,049 Roundtrip, found 3 days ago
$5,049
Roundtrip
found 3 days ago
Select LATAM Airlines Group flight, departing Thu, Jul 10 from St. Louis to Mount Pleasant, returning Sat, Jul 12, priced at $5,049 found 3 days ago
Flights from St. Louis (STL) to Mount Pleasant (MPN)
Origin airport
Lambert-St. Louis Intl.
Destination airport
Mount Pleasant
Roundtrip price
$3,538
Distance
6545 mi

St. Louis to Mount Pleasant Flights

The cheapest times to fly from St. Louis to Mount Pleasant

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 Mount Pleasant are during the month of July. You can find some of the cheapest flights from St. Louis to Mount Pleasant with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from St. Louis to Mount Pleasant

Sunday is one of the best days to book for cheap flights from St. Louis to Mount Pleasant: 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 Mount Pleasant

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 Mount Pleasant in 2025. You can also book with separate airlines for your outbound and return journeys, from $1,851 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 Mount Pleasant 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 Mount Pleasant 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 Mount Pleasant Airport (MPN) cost?
Discover the latest flight deals from STL to MPN by entering your preferred travel dates and searching on Expedia. Easily compare prices by departure date if you have flexibility with your schedule and use handy filters to explore prices for your preferred journey. As a member of One Key™, our free loyalty program, you can use Price Tracking to watch fares and receive notifications if prices go up or down.
What is the cheapest month to fly from STL to MPN?
The cheapest flights from STL to MPN are usually during off-peak season, when demand is lower. To save money, avoid flying during public holidays, school breaks and major local events.
What is the cheapest airline that flies from STL to MPN?
Use the filter tool on Expedia to compare airlines and find the cheapest carrier that'll take you from STL to MPN. Sort your results by "Price (lowest to highest)" to snap up a great deal.
How many flights per day from Lambert-St. Louis Intl. Airport (STL) to Mount Pleasant Airport (MPN)?
There are no daily nonstop flights departing from Lambert-St. Louis Intl. Airport (STL) to Mount Pleasant Airport (MPN). But you can choose flights with layovers. Filter your search on Expedia to include one or two stops, and you'll be cruising above the clouds in no time at all.
What day of the week has the most flights from STL to MPN?
Friday is generally the busiest day for flights, while Tuesday tends to be the quietest.* Remember that flight schedules can change based on a range of factors, such as the season and airline.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Lambert-St. Louis Intl. Airport (STL) to Mount Pleasant Airport (MPN)?
To avoid possible delays on the Lambert-St. Louis Intl. Airport (STL) to Mount Pleasant Airport (MPN) route, aim to travel before 3 PM. Flights after this time have a 22% higher chance of being canceled.**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.
Is it cheaper to buy a plane ticket from Lambert-St. Louis Intl. Airport (STL) to Mount Pleasant Airport (MPN) last-minute?
Last-minute bookings from STL to MPN are generally more expensive. For the lowest rates, start looking for flights as soon as possible. That said, if you can play around with your travel dates, you may land a cheap fare right before your trip.
Is it cheaper to book a STL to MPN flight and hotel package?
You can save money by booking a STL to MPN flight and hotel package compared to booking separately. In fact, travelers could save hundreds of dollars by bundling with Expedia. And it's simple to manage it all in one place. Once you've selected your ideal flights and accommodations, you can add extras like car rentals, tours and activities.
Can I cancel or change the date of my flight from Lambert-St. Louis Intl. Airport (STL) to Mount Pleasant Airport (MPN)?
If you booked your STL to MPN flight in the last 24 hours, you may be able to modify or cancel it without any fees. Depending on the airline and the type of fare you have, additional charges may apply for changes beyond this timeframe. Airline policies and contact information can be found in your itinerary or confirmation email. Or, head to our Customer Service portal if you'd like more information.

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*Available to One Key members.