There are 27 flights a week that touchdown in Tonga from the UK and on average, Nuku Alofa (TBU) is the cheapest airport to fly into. Use the search filters to customise your search; for instance searching by month will show the cheapest time of the week to fly.
There's a total of 187 airlines that operate all of Tonga's flights. Overall, Singapore Airlines is the most popular. Once you've selected your route and are ready to book, have your personal details close to hand.