This is live pricing from Travelpayouts' aggregation of 40+ booking engines. The $499 fare is the cheapest current round-trip from Boston (BOS) to STI on American Airlines flight AA4470, departing 2026-08-07 at 07:00 with return on 2026-08-10.

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