Cheap Flights from St Louis to Buenos Aires

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

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

Alternative St Louis to Buenos Aires routes

Looking for the cheapest, fastest or easiest route from St Louis to Buenos Aires? You could fly into the following airports instead.

St Louis to Buenos Aires: Flight information

The things to know before you go.
Cheapest flight foundRs133,188
Cheapest month to flySeptember

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

There are 2 airports in Buenos Aires: Buenos Aires Jorge Newbery and Buenos Aires Ministro Pistarini.
The best price we found for a return flight from St Louis to Buenos Aires is Rs274,274. 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 St Louis to Buenos Aires. But we found flights with one or more stops from Rs274,274.
As of July 2025, there are no flights flying from St Louis to Buenos Aires.
The cheapest month to fly from St Louis to Buenos Aires is usually August.
If you're flying from St Louis Airport, the cheapest airport near Buenos Aires is Buenos Aires Ministro Pistarini – which is 27.7 km away from the centre of Buenos Aires. We've found flights into this airport from Rs274,274.
After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from St Louis Airport to Buenos Aires on Friday, 22 August 2025.
No airlines currently offer direct flights between St Louis Airport and Buenos Aires. 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 Buenos Aires 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 Buenos Aires is around 40 days in advance, so don’t leave your flight to the last minute.
In July, the average temperature is usually around 10°C. January is typically the warmest month in Buenos Aires, when it usually averages around 30°C. You can expect the least rain in June. The coldest month is July, with temperatures averaging 6°C. The rainiest month is March.
Currently, Volaris offers the cheapest flight tickets to Buenos Aires.

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

  • The timezone in Buenos Aires is UTC-3. The city is two hours ahead of St Louis, where Lambert-St. Louis International Airport is located.

  • To avoid rushing for your STL to Buenos Aires flight, leave plenty of time for things like check-in and baggage drop. Arriving two hours before international departures and an hour before domestic flights is the general rule.

  • Delays at check-in and security are more likely if you're heading away during high season, so give yourself some extra breathing space. A good general rule for peak times? Arrive up to four hours early for international flights and two hours for domestic departures.

  • Consider adding a stopover to potentially find a cheaper flight ticket from STL to Buenos Aires. Just deselect 'Direct flights only' during your search. Break up your journey by stopping at one of these connecting airports:

    • Hartsfield-Jackson Atlanta International Airport (ATL)

    • Dallas/Fort Worth International Airport (DFW)

    • George Bush Intercontinental Airport (IAH)

  • STL is about 16 kilometres from central St Louis. If you're driving, ride-sharing or catching a cab from the centre, it'll take you 20 minutes or so to get there, depending on the traffic. If you're using public transport, expect the travel time to be around 35 minutes.

  • Searching for a hotel close to STL? If you're boarding an early flight from Lambert-St. Louis International Airport to Buenos Aires, these stays will put you moments from check-in:

  • Of all flights departing from Lambert-St. Louis International Airport, 78.04% land on schedule at their destination.

  • You'll find STL at 10701 Lambert International Blvd..

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

  • Rs133,188 is the cheapest price we've seen for a one-way Lambert-St. Louis International Airport to Buenos Aires flight. A return flight ticket right now is Rs274,274. Depending on when you want to go and the availability, these fares can change.

  • To pick up cheap flights from STL to Buenos Aires, book early. Airlines generally offer their most competitively priced fares when flights first go on sale.

  • If you have flexibility with your trip dates, check out the 'Whole month' tool. It'll give you the cheapest price across each month when looking for a Lambert-St. Louis International Airport to Buenos Aires ticket.

  • Cut down on the time spent looking for cheap flights from STL to Buenos Aires by setting up a Price Alert. You'll receive an email or push notification on the app when a lower fare pops up.

  • Choose your ideal arrival and departure times, number of stops and airlines with our filters. Then, sort the results for your flight from Lambert-St. Louis International Airport to Buenos Aires by 'Cheapest,' 'Best' or 'Fastest.'

Airports in Buenos Aires

Jorge Newbery Airport (AEP)

  • The distance from Jorge Newbery Airport (AEP) to central Buenos Aires is roughly 14 kilometres. It'll take you around 20 minutes to get to the centre driving.

  • If you're travelling on public transport, expect a journey time of around 40 minutes.

  • If you're arriving on a late flight from Lambert-St. Louis International Airport to Buenos Aires, nothing beats the convenience of staying near the terminal. Grab your luggage from the carousel and then be showered and relaxing soon after at one of these accommodation options near AEP:

  • Go where the road takes you with a Jorge Newbery Airport rental car. Book your wheels from Hertz, Localiza or rentar low cost and experience more of Buenos Aires and beyond.

  • For the lowest price, book your vehicle from Jorge Newbery Airport about one week ahead of your flight from STL to Buenos Aires.

Ministro Pistarini Airport (EZE)

  • Once your flight from Lambert-St. Louis International Airport to Buenos Aires has hit the tarmac, you can get to the city centre in about 35 minutes by car. Central Buenos Aires is roughly 32 kilometres from Ministro Pistarini Airport (EZE).

  • The journey will take roughly 2 hours 10 minutes on public transport.

  • Following your STL to Buenos Aires flight, rest your head at a hotel near EZE. These are some comfortable accommodation options that'll help you get into relaxation mode:

  • Hertz, Cactus and Localiza make collecting a Ministro Pistarini Airport rental car quick and easy. These trusted companies are located in or around the terminal and will have you behind the wheel before you know it.

  • Avoid last-minute price surges. Reserving your ride one week ahead of your arrival at EZE can land you a better rate.

Best time to go to Buenos Aires

  • Travel to Buenos Aires in peak season if you prefer a lively atmosphere, but remember that hotel prices may be higher. Alternatively, book flights from Lambert-St. Louis International Airport to Buenos Aires in the off-season when prices are cheaper and it's less crowded.

  • The warmest month in Buenos Aires is January, with temperatures ranging between 19ºC and 31ºC. Book your Lambert-St. Louis International Airport to Buenos Aires flight ticket then if that's the weather you find most pleasant.

  • Search for cheap tickets from STL to Buenos Aires in July if you'd rather travel when it's cooler. Temperatures are at their lowest then, ranging between 5ºC and 15ºC on average.

More about Buenos Aires

  • Start your Buenos Aires trip off on the right foot by choosing the ideal place to stay. Once you've booked your flight from Lambert-St. Louis International Airport to Buenos Aires, explore our selection of hotels including:

  • All great holidays should include some sightseeing. Recoleta Cemetery, Obelisco de Buenos Aires and Casa Rosada are must-do's during your Buenos Aires adventure.

Explore more of Argentina

  • Rosario is just one of the many cities in Argentina waiting to be explored after you've seen Buenos Aires. Around 274 kilometres away to the north-west, its top attractions include Monumento a la Bandera (Flag Monument), Predio Ferial Parque de la Independencia and Parque Nacional a la Bandera.

  • Mar Del Plata is another standout destination in Argentina and is around 386 kilometres south of Buenos Aires. No journey is complete without a visit to Casino Central de Mar del Plata, Centro Cultural Villa Victoria Ocampo and Villa Ortiz Basualdo.Museo Municipal de Arte Juan Carlos Castagnino.

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