This is live pricing from Travelpayouts' aggregation of 40+ booking engines. The $675 fare is the cheapest current round-trip from London (LGW) to LAX on Swiss flight LX431, departing 2026-09-02 at 09:25 with return on 2026-09-09.

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