Boston (BOS) to Fort Lauderdale (FLL): 1,239 miles (1,994 km) great-circle, about 3h 00m nonstop by our estimate. Cheapest fare observed: $133 round-trip on Frontier, with 1 stop, departing May 19, 2026.
$133 round-trip, Frontier F93347, departing 2026-05-19 at 10:07, returning 2026-05-21. The recorded itinerary left on a Tuesday, returning on a Thursday 2 nights later; the fare was observed 24 days before departure. "Book this flight" opens Kiwi.com with the same airline and dates.
At $133, it ranked 2nd of the 30 round-trip fares we recorded from BOS (median $623). That is 10.7 cents per great-circle mile (round-trip price over one-way distance), below the BOS median of 19.1 cents across 30 round-trip routes.
Routes from BOS of similar length: Miami (1,260 mi) at $203 and Orlando (1,116 mi) at $125.
Frontier had the cheapest fare on 6 of 30 BOS routes. It is the 24th longest of the 30 routes we track from BOS.
Of 28 departure airports with a fare to Fort Lauderdale, Boston (BOS) ranked 9th at $133. Lowest: $64 from Charlotte (CLT); highest: $1825 from Wellington (WLG); 16 nonstop. Cheapest-fare airlines (routes): Frontier (8), Spirit (8), JetBlue (4), WestJet (3), Air Transat (1) and American Airlines (1), plus 3 more.
The reverse, Fort Lauderdale (FLL) to Boston (BOS), was $101 round-trip on Spirit, nonstop, departing May 6, 2026. Fort Lauderdale to Boston 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.