Miami (MIA) to Buenos Aires (BUE): 4,424 miles (7,119 km) great-circle, about 9h 20m nonstop by our estimate. Cheapest fare observed: $575 round-trip on Arajet, with 1 stop, departing June 5, 2026.
$575 round-trip, Arajet DM2101, departing 2026-06-05 at 14:09, returning 2026-06-17. The recorded itinerary left on a Friday, returning on a Wednesday 12 nights later; the fare was observed 41 days before departure. "Book this flight" opens Kiwi.com with the same airline and dates.
At $575, it ranked 17th of the 30 round-trip fares we recorded from MIA (median $480). That is 13.0 cents per great-circle mile (round-trip price over one-way distance), below the MIA median of 18.9 cents across 30 round-trip routes.
Routes from MIA of similar length: Malaga (4,427 mi) at $1051 and Madrid (4,415 mi) at $677.
Arajet had the cheapest fare on 5 of 30 MIA routes. It is the 11th longest of the 30 routes we track from MIA.
Of 14 departure airports with a fare to Buenos Aires, Miami (MIA) ranked 5th at $575. Lowest: $251 from Rio de Janeiro (GIG); highest: $2255 from Addis Ababa (ADD); 5 nonstop. Cheapest-fare airlines (routes): Arajet (3), LATAM (2), Aeromexico (1), Air Canada (1), Avianca (1) and Cathay Pacific (1), plus 5 more.
Travelpayouts fares (cheapest per route, observed April 25, 2026); OurAirports coordinates and elevations; IANA zones America/New_York, America/Argentina/Buenos_Aires; flight time is our estimate.