This is live pricing from Travelpayouts' aggregation of 40+ booking engines. The $101 fare is the cheapest current round-trip from Fort Lauderdale (FLL) to BOS on Spirit flight NK811, departing 2026-05-06 at 20:40 with return on 2026-05-09.

Clicking "Book this flight" opens Kiwi.com with this exact flight pre-filtered — same airline, same dates, same passenger count.