Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Hamilton to Colombo Bandaranaike Intl Airport as you normally would.
Located just 10.1 km from the city centre, Hamilton is the airport most travellers will use when flying to Colombo Bandaranaike Intl from Hamilton. Booking flights from Hamilton (HLZ) to Colombo Bandaranaike Intl should be relatively easy as there are 0 daily outbound flights to Colombo Bandaranaike Intl from 0 different airlines.
Fully vaccinated travelers are recommended to have comprehensive travel insurance that will cover health and other expenses related to COVID-19. If traveling with unvaccinated or not-fully vaccinated children, the comprehensive travel insurance should be extended to also cover them.