Miami to Buenos Aires is the main nonstop gateway between the US and Argentina, an overnight long-haul of about nine hours. Checking every return fare on sale, the route splits sharply in two: the nonstops run $840–$850, while a connection through the Caribbean comes in at $434–$629 for the cost of several extra hours. This guide covers who really flies it, what each option actually costs in dollars, and when to book.
Route: Miami (MIA) → Buenos Aires, Ezeiza International (EZE)
Distance: approximately 7,115 km (4,421 miles)
Non-stop flight time: about 8h 50m – 9h 10m southbound
Direct flights: Yes — American Airlines, Aerolíneas Argentinas and LATAM all fly nonstop from Miami, most of them overnight on Boeing 787 Dreamliners. In our fare data the nonstops sit at $840–$850, and connecting itineraries through the Dominican Republic (Punta Cana or Santo Domingo) are substantially cheaper at $434–$629 — but they are the long way round.
Fares from Miami to Buenos Aires (USD)
Argentina’s seasons are the mirror image of the northern hemisphere, so the Argentine summer (December–February) and the Christmas/New Year holidays are the busiest and priciest weeks. The Argentine winter (June–August) lines up with the US summer holidays but still tends to offer the year’s lowest fares. The figures below are typical economy round-trip fares in dollars.
| Month | Demand | What to expect |
|---|---|---|
| January | — | very high (peak summer) |
| February | — | high |
| March | — | medium-high |
| April | — | medium |
| May | — | low-medium |
| June | — | low |
| July | — | medium (US summer) |
| August | — | low-medium |
| September | — | medium |
| October | — | medium-high |
| November | — | medium-high |
| December | — | very high (holidays) |
Checked against every return fare on sale as we write, the two ways of flying this route price very differently and it is worth being clear which is which. The nonstop is $840–$850 on LATAM and Aerolíneas Argentinas — that is the going rate for a direct, not a peak-season number, so around $850 is a fair nonstop price rather than an expensive one. Connecting itineraries through Punta Cana or Santo Domingo run $434–$629, median $548, on a low-cost Dominican routing. If you see a sub-$650 fare on this route it will be one of those; check the total journey time and the baggage rules before you book it.
Airlines on this route
Non-stop (about 9 hours, usually overnight):
- American Airlines — multiple nonstop flights from its Miami hub, mostly evening departures arriving next morning, on Boeing 787 Dreamliners.
- Aerolíneas Argentinas — Argentina’s flag carrier, with nonstops from Miami and the widest onward network within Argentina from Buenos Aires.
- LATAM — nonstop service with a solid economy product and connections across South America.
One-stop (sometimes cheaper):
- Connecting itineraries via Panama City, Lima, Bogotá or São Paulo can undercut the nonstops during sales, at the cost of several extra hours — worth a look if price matters more than time.
Because three carriers fly nonstop, fares are competitive for a route this long. Compare the all-in price including bags — the cheapest basic-economy fares add checked-bag fees, which add up on a two-week South America trip.
When to book & how to save
- Book 2–4 months ahead for the best balance of price and choice; long-haul fares to Buenos Aires rarely improve in the final weeks.
- Avoid the Argentine summer peak: December through February and the Christmas/New Year holidays are the busiest and most expensive.
- Travel in the Argentine winter (June–August) for the lowest fares — Buenos Aires is a big city that’s enjoyable year-round, and winters are cool rather than harsh.
- Consider a one-stop via a Latin American hub if a sale undercuts the nonstops — just weigh the extra travel time.
- Check bag rules: basic-economy fares to Argentina often exclude checked bags, so compare the total cost before booking.
Arriving in Buenos Aires
Nearly all international flights land at Ezeiza International (EZE), about 35 km southwest of the city centre. There’s no train; the usual options are an official airport taxi or pre-booked remise (roughly $30–$45 to the central neighbourhoods, agree the fare or use the airport desk) or the dedicated Manuel Tienda León shuttle bus for a good deal less. Domestic flights within Argentina mostly use the separate Aeroparque Jorge Newbery (AEP), right by the city — check which airport your onward ticket uses, as they’re about 40 km apart. Argentina uses the peso, and payment can be complex, so carry some US dollars as a backup.
Frequently asked questions
How long is the flight from Miami to Buenos Aires?
Nonstop flights take about 8 hours 50 minutes to 9 hours 10 minutes southbound from Miami to Buenos Aires, and are usually flown overnight. The return leg is a similar length. One-stop itineraries via another Latin American hub can add several hours to the total journey.
Are there direct flights from Miami to Buenos Aires?
Yes. American Airlines, Aerolíneas Argentinas and LATAM all fly nonstop from Miami to Buenos Aires, most departures leaving in the evening and arriving the next morning. Between them there are around a dozen or more nonstop flights each week.
How much does it cost to fly from Miami to Buenos Aires?
It depends entirely on whether you fly direct. Nonstop returns run about $840–$850 on LATAM and Aerolíneas Argentinas. Connecting returns through the Dominican Republic run $434–$629, median $548. The December–February Argentine summer and the holidays push both tiers higher.
What is the cheapest month to fly from Miami to Buenos Aires?
June is usually the cheapest, with May and August close behind. In the dates we could price, connecting returns started at $434 and the cheapest nonstop at $840. Avoid December, January and February — the Argentine summer and Christmas holidays — which are the busiest and most expensive times to fly.
Which airlines fly from Miami to Buenos Aires?
Nonstop from Miami: LATAM ($840–$850) and Aerolíneas Argentinas ($842–$850) carried all the direct fares we found, both on Boeing 787 Dreamliners; Aerolíneas offers the best onward connections within Argentina. American Airlines also flies the route nonstop but did not appear among the cheapest fares when we checked. Connecting itineraries through Punta Cana or Santo Domingo on a Dominican low-cost carrier were much cheaper at $434–$629, at the cost of a long detour.
Which airport do I fly into in Buenos Aires?
You arrive at Ezeiza International (EZE), about 35 km southwest of the city and Argentina’s main international gateway. Domestic flights within Argentina usually use the separate Aeroparque (AEP) near the waterfront, so if you’re connecting onward, check which airport your ticket uses.
How far in advance should I book Miami to Buenos Aires flights?
Aim to book 2 to 4 months ahead. Long-haul fares to Buenos Aires tend to climb as departure approaches, especially around the December–February Argentine summer and the Christmas peak, so booking early almost always saves money on this route.
Is it cheaper to fly on weekdays?
Often, yes — midweek departures (Tuesday to Thursday) are usually a little cheaper than weekend ones, and flying out and back midweek can save $50–$150 on a long-haul return like this. Being flexible by a day or two is one of the easiest ways to trim the fare.
Fare guidance based on aifly.one deal tracking and current airline schedules; last reviewed July 2026. Indicative economy returns — always check the live fare before booking.
