This is live pricing from Travelpayouts' aggregation of 40+ booking engines. The $601 fare is the cheapest current round-trip from Philadelphia (PHL) to BUF on Southwest flight WN2371, departing 2026-08-05 at 15:05 with return on 2026-08-06.

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