This is live pricing from Travelpayouts' aggregation of 40+ booking engines. The $924 fare is the cheapest current round-trip from Washington DC (IAD) to LIS on Air Canada flight AC8726, departing 2026-07-14 at 15:45 with return on 2026-07-21.

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