Cheap Flights from St. Louis (STL) to Mar Del Plata (MDQ)

Popular airlines from St. Louis Lambert Intl. Airport (STL) to Mar Del Plata (MDQ-Astor Piazzola Intl.)

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Frequently asked questions

How much does a flight from Lambert-St. Louis Intl. Airport (STL) to Astor Piazzola Intl. Airport (MDQ) cost?
Grab a cheap one-way flight or cheap return flight from Lambert-St. Louis Intl. Airport (STL) to Astor Piazzola Intl. Airport (MDQ) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to find our cheapest flight offers on this route.
What is the cheapest month to fly from Lambert-St. Louis Intl. Airport (STL) to Astor Piazzola Intl. Airport (MDQ)?
is the cheapest month to fly from STL to MDQ. Timing your trip outside of the busy season is often the key to finding better deals on flights.
What is the cheapest airline that flies from Lambert-St. Louis Intl. Airport (STL) to Astor Piazzola Intl. Airport (MDQ)?
Use the filters on Expedia to compare different airlines and find the cheapest carrier that'll take you from STL to MDQ. Then, sort your results by "Price (lowest to highest)" to pick up a good deal.
How many flights per day from Lambert-St. Louis Intl. Airport (STL) to Astor Piazzola Intl. Airport (MDQ)?
Nonstop flights from Lambert-St. Louis Intl. Airport (STL) to Astor Piazzola Intl. Airport (MDQ) aren't available daily, so you'll need to take a flight with a layover. Explore your options with Expedia's filters. Enter your travel details and pick either "1 Stop" or "2+ Stops."
What day of the week has the most flights from STL to MDQ?
You'll typically find Tuesday the quietest day for flights, while Fridays tend to be the busiest.* However this can change from season to season and during peak travel times or public holidays.*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 Astor Piazzola Intl. Airport (MDQ)?
Choose a flight from Lambert-St. Louis Intl. Airport (STL) to Astor Piazzola Intl. Airport (MDQ) that leaves before 3 PM to reduce the likelihood of delays and cancellations. Departures after this time have a 22% higher chance of being canceled, on average.**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 Astor Piazzola Intl. Airport (MDQ) last-minute?
Last-minute bookings from STL to MDQ are usually more expensive. To secure the best prices, start looking for flights as early as possible. That being said, if you're flexible with your travel dates, you may find a cheap ticket right before your trip.
Is it cheaper to book a STL to MDQ flight and hotel package?
Compared with arranging hotels and flights separately, booking a STL to MDQ flight and hotel package with Expedia could lead to significant savings. Better still, managing everything in one place will take the hassle out of travel planning. Just pick your flights and select from our extensive range of stays, then tailor your trip with extras like tours, car rentals and activities.
Can I cancel or change the date of my flight from Lambert-St. Louis Intl. Airport (STL) to Astor Piazzola Intl. Airport (MDQ)?
In most cases, you can reschedule or cancel your STL to MDQ flight. However, there may be additional fees, especially if you booked over 24 hours ago. Check your itinerary for the airline's rules and fees on flight changes, or if you want further information, head to our Customer Service portal.

Travel information

Travel information

Origin airport
Lambert-St. Louis Intl.
Destination airport
Astor Piazzola Intl.
Distance
5692 mi

Book with confidence

Book with confidence

St. Louis to Mar Del Plata Flights

The cheapest times to fly from St. Louis to Mar Del Plata

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

 

The best time to book a flight from St. Louis to Mar Del Plata

Sunday is one of the best days to book for cheap flights from St. Louis to Mar Del Plata: 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 Mar Del Plata

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 Mar Del Plata in 2025. You can also book with separate airlines for your outbound and return journeys, from 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 Mar Del Plata 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 Mar Del Plata 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.

 

St. Louis to Mar Del Plata Flights

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*Available to One Key members.