Cheap Flights from Buenos Aires to St Louis

Compare Buenos Aires to St Louis flight deals

Find the cheapest month or even day of the year to fly to St Louis

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Find the cheapest month to fly from Buenos Aires to St Louis

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like Buenos Aires to St Louis flights are currently cheapest in April.

Buenos Aires to St Louis: Alternative routes

Compare routes from Buenos Aires to St Louis below. You may find an airport to fly into that's cheaper, faster, or easier than St Louis.

Buenos Aires to St Louis: Flight information

The things to know before you go.
Cheapest flight foundRs119,930
Cheapest month to flyApril

Finding cheap flights from Buenos Aires to St Louis: Frequently asked questions

The best price we found for a return flight from Buenos Aires to St Louis is Rs221,713. This is an estimate based on information collected from different airlines and travel providers over the last 4 days and is subject to change and availability.
Currently, there are no airlines that fly direct from Buenos Aires to St Louis. But we found flights with one stop from Rs221,713.
As of March 2026, there are no flights flying from Buenos Aires to St Louis.
The cheapest month to fly from Buenos Aires to St Louis is usually April.
After crunching the numbers on our flight calendar, we found that it is currently cheapest to fly from Buenos Aires to St Louis Airport on Monday, 20 April 2026.
No airlines currently offer direct flights between Buenos Aires and St Louis Airport. Most routes have one or more stops.
We show every price from over 1,200 airlines and travel agents, comparing them all so you don’t have to. If you know you want to fly to St Louis but you’re not ready to book, set up a Price Alert. We’ll track prices for you, and let you know when they rise or fall.
We crunched all the numbers in our flight calendar and it looks like the cheapest time to book a flight to St Louis is around 40 days in advance, so don’t leave your flight to the last minute.
The cheapest airline that flies to St Louis is Avianca .

Flying from Buenos Aires to Lambert-St. Louis International Airport (STL): What you need to know

  • Buenos Aires is home to two main airports where you can set off on your adventure. Explore your options for booking a flight from Buenos Aires to Lambert-St. Louis International Airport (STL) flying out of Jorge Newbery Airport (AEP) or Ministro Pistarini Airport (EZE).

  • St Louis is two hours behind Buenos Aires. Lambert-St. Louis International Airport is located in St Louis, which runs on the UTC-5 timezone.

  • To ensure you get on your flight from Buenos Aires to STL, leave plenty of time to navigate the airport and find your gate. Turning up two hours ahead of international departures and one hour before domestic flights is the general travel rule.

  • Peak season means busier airports, so be there even earlier. Give yourself at least two hours before a domestic flight and four hours for an international journey to stick to your schedule.

Airports in Buenos Aires

Jorge Newbery Airport (AEP)

  • AEP is around 14 kilometres from central Buenos Aires. If you're ride-sharing, driving or catching a cab from the centre, it'll take 20 minutes or so to get there, depending on traffic. If you're planning to take public transport, expect the travel time to be around 40 minutes.

  • Want a leisurely start to your holiday? Stay near Jorge Newbery Airport. Whether you've booked an early flight from Buenos Aires to Lambert-St. Louis International Airport or just don't like being rushed, these hotels are just the thing:

  • Jorge Newbery Airport earns top marks for its on-time performance. 83.76% of flights that depart AEP land on time.

Ministro Pistarini Airport (EZE)

  • Split up your flight from Buenos Aires to Lambert-St. Louis International Airport with a stop so you can stretch your legs or tick another place off your list. Some great stopovers between Ministro Pistarini Airport and STL include:

    • Hartsfield-Jackson Atlanta International Airport (ATL)

    • Dallas/Fort Worth International Airport (DFW)

    • George Bush Intercontinental Airport (IAH)

  • You can get to EZE from the centre of Buenos Aires in approximately 35 minutes by car, depending on traffic conditions. The journey on public transport will take roughly 2 hours 10 minutes to cover the 32 kilometres or so.

  • Flying off with the first light? Think about checking in to one of these accommodation options near Ministro Pistarini Airport the day before your Buenos Aires to STL flight:

  • Flights from Ministro Pistarini Airport have a reputation for punctuality, with 83.93% of them arriving as expected.

About Lambert-St. Louis International Airport (STL)

Getting from Lambert-St. Louis International Airport (STL) to central St Louis

  • The centre of St Louis is about 16 kilometres from Lambert-St. Louis International Airport. Journey times by cab or car hire will vary based on traffic conditions and time of day, so do some research ahead of time.

  • It takes around 35 minutes if you're travelling by public transport.

How to find the cheapest flights from Buenos Aires to Lambert-St. Louis International Airport (STL)

  • The cheapest price we've found for a one-way ticket from Buenos Aires to Lambert-St. Louis International Airport is Rs119,930. For a return flight on this route, the best price is Rs221,713. Depending on how early you book and the availability, these fares can change.

  • To pick up cheap flights from Buenos Aires to STL, book early. Airlines typically offer the most competitive fares when flights first go on sale.

  • Affordable Buenos Aires to Lambert-St. Louis International Airport tickets are easier to find if you're not locked into specific dates. Use the 'Whole month' search tool to compare fares across the month and then pick the cheapest day.

  • Be the first to know about deals for flight tickets from Buenos Aires to STL by setting up a Price Alert. We'll send you an email or notification on the app when a new discounted fare appears.

  • Tailor your flights using filters. Select your ideal arrival and departure times, total journey duration and airlines. You can also sort your results by 'Best,' 'Cheapest' or 'Fastest' flights from Buenos Aires to Lambert-St. Louis International Airport.

The best time to fly from Buenos Aires to Lambert-St. Louis International Airport (STL)

  • April is the quietest month for flights from Buenos Aires to Lambert-St. Louis International Airport (STL), while July is the most popular. Pick the ideal time to visit St Louis based on whether you want a laid-back vibe or a more bustling atmosphere.

  • Book a Buenos Aires to STL flight ticket departing in July if you're eager to explore the city during its warmest month. You can expect temperatures in St Louis to range from 17ºC to 33ºC.

  • January has temperatures of between -8ºC and 7ºC. Search for cheap tickets from Buenos Aires to Lambert-St. Louis International Airport around that time if you'd rather travel in cooler conditions.

More about St Louis

Explore more of the United States

  • Evansville is just one of the many cities in the United States waiting to be discovered once you've seen the sights of St Louis. Around 257 kilometres away to the east, its top attractions include Mesker Park Zoo, Riverfront Park and Evansville Zoological Society.

  • Around 177 kilometres west of St Louis, Columbia is another favourite stop in the United States. Experience this destination's highlights firsthand at Sentinel Park, Museum of Art and Archaeology and Bur Oak Brewing Company.

Prices shown on this page are estimated lowest prices only. Found in the last 45 days.