$785 Cheap Flights from St. Louis (STL) to Ushuaia (USH)

View $785 flight on Wed, Aug 27, 2025Opens in a new window

Popular airlines from St. Louis Lambert Intl. Airport (STL) to Ushuaia (USH-Malvinas Argentinas Intl.)

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Cheap Flights from St. Louis to Ushuaia (STL-USH)

Prices were available within the past 7 days and start at $785 for one-way flights and $2,163 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Air Canada
Sun, Nov 2 - Fri, Nov 14
STL
St. Louis
USH
Ushuaia
$2,163 Roundtrip, found 6 days ago
$2,163
Roundtrip
found 6 days ago
Select Air Canada flight, departing Sun, Nov 2 from St. Louis to Ushuaia, returning Fri, Nov 14, priced at $2,163 found 6 days ago
Air Canada
Thu, Dec 4 - Thu, Dec 18
STL
St. Louis
USH
Ushuaia
$2,848 Roundtrip, found 3 days ago
$2,848
Roundtrip
found 3 days ago
Select Air Canada flight, departing Thu, Dec 4 from St. Louis to Ushuaia, returning Thu, Dec 18, priced at $2,848 found 3 days ago

Frequently asked questions

How much does a flight from Lambert-St. Louis Intl. Airport (STL) to Malvinas Argentinas Intl. Airport (USH) cost?
Discover the latest flight deals from STL to USH 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 USH?
The cheapest flights from STL to USH 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 USH?
Use the filter tool on Expedia to compare airlines and find the cheapest carrier that’ll take you from STL to USH. 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 Malvinas Argentinas Intl. Airport (USH)?
You’ll need to take a flight with a layover if you’re traveling from Lambert-St. Louis Intl. Airport (STL) to Malvinas Argentinas Intl. Airport (USH). Direct flights don’t operate daily on this route. However, simply filter your search to include one or more stops to find the best option for your trip.
What day of the week has the most flights from STL to USH?
Friday is usually the busiest day for flights, while Tuesday tends to be the quietest.* Remember that flight schedules can change depending on various factors, including the time of year and carrier.*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 Malvinas Argentinas Intl. Airport (USH)?
To land at Malvinas Argentinas Intl. Airport (USH) without delays, opt for a flight that leaves 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.
Is it cheaper to buy a plane ticket from Lambert-St. Louis Intl. Airport (STL) to Malvinas Argentinas Intl. Airport (USH) last-minute?
Booking your plane ticket from STL to USH shortly before your journey is usually more expensive. But if there’s some wiggle room with your travel dates and times, you could snag a cheap last-minute fare.
Is it cheaper to book a STL to USH flight and hotel package?
Opting for a STL to USH flight and hotel package is typically cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your trip all in one place. Choose from our impressive range of accommodations and then add car rentals, activities and flights to your booking. Bundle it all together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Lambert-St. Louis Intl. Airport (STL) to Malvinas Argentinas Intl. Airport (USH)?
In most instances, you can cancel or reschedule your STL to USH flight. However, there may be additional fees, especially if you made your booking over 24 hours ago. Double-check your itinerary for the airline’s policies and fees on flight changes, or if you want more information, visit our Customer Service portal.
*Available to One Key members.