Miami (MIA) to San Juan (SJU): 1,045 miles (1,682 km) great-circle, about 2h 35m nonstop by our estimate. Cheapest fare observed: $202 round-trip on Frontier, with 1 stop, departing June 9, 2026.
$202 round-trip, Frontier F93037, departing 2026-06-09 at 14:54, returning 2026-06-13. The recorded itinerary left on a Tuesday, returning on a Saturday 4 nights later; the fare was observed 45 days before departure. "Book this flight" opens Kiwi.com with the same airline and dates.
At $202, it ranked 7th of the 30 round-trip fares we recorded from MIA (median $480). That is 19.3 cents per great-circle mile (round-trip price over one-way distance), close to the MIA median of 18.9 cents across 30 round-trip routes.
Routes from MIA of similar length: San Salvador (1,026 mi) at $329 and Managua (1,018 mi) at $404.
Frontier had the cheapest fare on 7 of 30 MIA routes. It is the 22nd longest of the 30 routes we track from MIA.
Of 20 departure airports with a fare to San Juan, Miami (MIA) ranked 11th at $202. Lowest: $127 from Orlando (MCO); highest: $632 from Washington DC (IAD); 7 nonstop. Cheapest-fare airlines (routes): Frontier (9), Spirit (4), American Airlines (2), JetBlue (2), Southwest (1) and United Airlines (1), plus 1 more.
Travelpayouts fares (cheapest per route, observed April 25, 2026); OurAirports coordinates and elevations; IANA zones America/New_York, America/Puerto_Rico; flight time is our estimate.