This is live pricing from Travelpayouts' aggregation of 40+ booking engines. The $423 fare is the cheapest current round-trip from Tokyo (NRT) to NHA on Vietnam Airlines flight VN307, departing 2026-07-23 at 09:30 with return on 2026-07-29.

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