Fort Lauderdale (FLL) to Boston (BOS): 1,239 miles (1,994 km) great-circle, about 3h 00m nonstop by our estimate. Cheapest fare observed: $101 round-trip on Spirit, nonstop, departing May 6, 2026.
$101 round-trip, Spirit NK811, departing 2026-05-06 at 20:40, returning 2026-05-09. The recorded itinerary left on a Wednesday, returning on a Saturday 3 nights later; the fare was observed 11 days before departure. "Book this flight" opens Kiwi.com with the same airline and dates.
At $101, it ranked 6th of the 30 round-trip fares we recorded from FLL (median $222). That is 8.2 cents per great-circle mile (round-trip price over one-way distance), below the FLL median of 17.5 cents across 30 round-trip routes.
Routes from FLL of similar length: Kansas City (1,230 mi) at $302 and Chicago (1,184 mi) at $126.
Spirit had the cheapest fare on 15 of 30 FLL routes. It is the 10th longest of the 30 routes we track from FLL.
Of 22 departure airports with a fare to Boston, Fort Lauderdale (FLL) ranked 1st at $101. Lowest: $101 from Fort Lauderdale (FLL); highest: $1271 from Nairobi (NBO); 5 nonstop. Cheapest-fare airlines (routes): American Airlines (6), Frontier (5), Spirit (4), Southwest (3), Avianca (1) and Brussels Airlines (1), plus 2 more.
The reverse, Boston (BOS) to Fort Lauderdale (FLL), was $133 round-trip on Frontier, 1 stop, departing May 19, 2026. Boston to Fort Lauderdale flights.
Travelpayouts fares (cheapest per route, observed April 25, 2026); OurAirports coordinates and elevations; IANA zones America/New_York, America/New_York; flight time is our estimate.