Following a 35% increase in demand, Tui will add an extra 6,000 Thailand seats this winter with the launch of a new Friday service from Gatwick in early December.
The new flight will allow tourists to opt for 10- and 11-night stays, in addition to the seven- or 14-night holidays it already has on sale. It is also adding 13 new hotels to its accommodation portfolio.
The airline and operator will add a further 9,000 seats next year with the introduction in November of a second service from both Gatwick and Manchester airports.