Flight tickets from St Louis to Buenos Aires

Compare St Louis to Buenos Aires flight deals

Find the cheapest month or even day of the year to fly to Buenos Aires

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Flight deals from St Louis to Buenos Aires

Looking for a cheap last-minute deal or the best return flight from St Louis Airport to Buenos Aires? If you want to travel next month, return fares start from ₹ 127,560. Find the lowest prices on one-way and return tickets right here.

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 October.

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 found₹ 76,356
Cheapest month to flyOctober

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 ₹ 93,412. 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 ₹ 93,412.
As of June 2026, 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 ₹ 93,412.
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 Monday, 3 August 2026.
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 June, the average temperature is usually around 11°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, Frontier Airlines offers the cheapest flight tickets to Buenos Aires.

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

  • Buenos Aires is three hours ahead of St Louis, where St Louis Lambert International Airport is located. Buenos Aires observes the UTC-3 timezone.

  • For a stress-free journey, arrive at the airport two hours ahead of international flights and an hour before domestic departures. This leaves you with plenty of time to board your STL to Buenos Aires flight.

  • Travelling during a peak time like July? School holidays and other high seasons can lead to longer queues and delays at security. Play it safe and arrive up to four hours ahead of international flights and two hours before a domestic departure.

  • Stopovers are the perfect opportunity to take a break from travelling and maybe even tick off a new city. When browsing for plane tickets from STL to Buenos Aires, deselect the 'Direct flights only' box to see where you can visit along the way. Here are some popular options to consider:

    • Atlanta Hartsfield-Jackson International Airport (ATL)

    • Dallas Fort Worth International Airport (DFW)

    • Houston George Bush Intercontinental Airport (IAH)

  • STL is about 16 kilometres from central St Louis. If you're ride-sharing, driving or catching a taxi from the centre, it'll take 25 minutes or so to get there, depending on traffic conditions. If you're taking public transport, expect the travel time to be around 30 minutes.

  • Have an early flight from St Louis Lambert International Airport to Buenos Aires? Avoid rushing to the terminal (and sneak in some extra precious sleep) by choosing one of these stays near STL:

  • Of the departures from St Louis Lambert International Airport, 76% touch down on time at their destination.

  • STL is located at 10701 Lambert International Blvd..

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

  • ₹ 76,356 is the lowest price we've seen for a one-way St Louis Lambert International Airport to Buenos Aires flight. A round-trip plane ticket right now is ₹ 93,412. Depending on how early you book and the availability, these fares can change.

  • Don't leave everything to the last moment. You're more likely to find cheap flights from STL to Buenos Aires if you book early. Airlines often have some excellent early bird rates.

  • If you can be flexible with your travel dates, use the 'Whole month' search tool. It'll find the lowest price across each month when searching for your St Louis Lambert International Airport to Buenos Aires ticket.

  • There's no need to keep looking every day to see if fares have dropped when you create a Price Alert. We'll let you know as soon as there's an even bigger deal on cheap flights from STL to Buenos Aires.

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

Airports in Buenos Aires

Buenos Aires Jorge Newbery Airfield (AEP)

  • Buenos Aires Jorge Newbery Airfield (AEP) to central Buenos Aires takes about 25 minutes by car. The centre is roughly 8 kilometres away.

  • If you're taking public transport, expect a journey time of about 40 minutes.

  • If you're arriving on a late flight from St Louis Lambert International Airport to Buenos Aires, nothing beats the convenience of staying near the terminal. Pick up your bags from the carousel and then be showered and sleeping soon after at one of these hotels near AEP:

  • Reserving your ride from Buenos Aires Jorge Newbery Airfield about one week in advance of your flight from STL to Buenos Aires can help you secure the lowest rate.

Buenos Aires Ministro Pistarini Intl Airport (EZE)

  • Buenos Aires Ministro Pistarini Intl Airport (EZE) is around 32 kilometres from central Buenos Aires. After your flight from St Louis Lambert International Airport to Buenos Aires, it'll take you around 30 minutes to get to the heart of the city in a taxi or ride-share.

  • The trip will take about 1 hour 15 minutes on public transport.

  • Following your STL to Buenos Aires flight, settle in at a hotel near EZE. These are some great options that'll help you switch to relaxation mode:

  • Snap up the best price by booking your ride from EZE one week ahead of time. You'll also have access to a wider selection of vehicles.

Best time to go to Buenos Aires

  • It's time to choose your trip dates for your flight from St Louis Lambert International Airport to Buenos Aires. September is the most popular month to visit Buenos Aires. If you want a quieter vibe, go in December.

  • The warmest month in Buenos Aires is January, with temperatures ranging between 18ºC and 32ºC. Lock in your St Louis Lambert International Airport to Buenos Aires plane ticket then if that's the weather you find most pleasant.

  • July has average temperatures of between 5ºC and 16ºC. Search for a cheap ticket from STL to Buenos Aires around that time if you like travelling in cooler conditions.

More about Buenos Aires

  • Start your Buenos Aires trip off on the right foot by choosing the perfect place to stay. As soon as you've booked your flight from St Louis Lambert International Airport to Buenos Aires, browse our selection of hotels including:

  • El Ateneo Grand Splendid and Teatro Colon are a couple of top attractions to put on your Buenos Aires travel itinerary. Keep the adventure rolling by checking out Recoleta Cemetery.

Explore more of Argentina

  • You've seen Buenos Aires, now it's time to explore other corners of Argentina. Travel about 274 kilometres northwest to Rosario to tick off its popular sights. From Casa Natal Che Guevara to Monumento al Che Guevara and Casa Natal de Lionel Messi, there's plenty to keep you busy.

  • Mar Del Plata is another must-experience destination in Argentina and is around 386 kilometres south of Buenos Aires. No journey is complete without visiting Teatro Colon, Playa Popular and Aquasol Water Park.

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