This is live pricing from Travelpayouts' aggregation of 40+ booking engines. The $841 fare is the cheapest current round-trip from Washington DC (DCA) to LIS on Air Canada flight AC8824, departing 2026-07-14 at 16:20 with return on 2026-07-20.

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