This is live pricing from Travelpayouts' aggregation of 40+ booking engines. The $650 fare is the cheapest current round-trip from New York (LGA) to LON on Air Canada flight AC8641, departing 2026-07-23 at 17:40 with return on 2026-08-09.

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