This is live pricing from Travelpayouts' aggregation of 40+ booking engines. The $646 fare is the cheapest current round-trip from Charlotte (CLT) to SFO on Southwest flight WN148, departing 2026-08-03 at 10:35 with return on 2026-08-03.

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