Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Qatar to Tonga as you normally would.
Related info for your journey
Useful info, stats and facts about Qatar to Tonga flights.
DOH stands for Doha Hamad Intl Airport, while TBU stands for Nuku‘alofa Fua'Amotu Intl Airport. These codes are often called IATA codes, a set of identifiers established by IATA (International Air Transport Association) that is widely used by airlines and the aviation industry. Vava'u Lupepau'U Airport (VAV) are other airports near this flight route and their unique identifiers/IATA codes.