This is live pricing from Travelpayouts' aggregation of 40+ booking engines. The $576 fare is the cheapest current round-trip from Boston (BOS) to LIS on Virgin Atlantic flight VS3953, departing 2026-09-13 at 23:25 with return on 2026-10-29.

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