This is live pricing from Travelpayouts' aggregation of 40+ booking engines. The $707 fare is the cheapest current round-trip from London (LGW) to NYC on Swiss flight LX431, departing 2026-05-15 at 09:25 with return on 2026-05-20.

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