Due to multiple factors, expect to potentially pay more when booking in December. For low rates, May can be a great choice for travel to Tongatapu. Flights to Tongatapu from London Heathrow Airport in May are about £1,996 on average during May, but can be found for as low as £1,494.
When flying from London Heathrow Airport to Tongatapu, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.
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