Out likely endpoint airport is Legazpi. I would be very surprised if they arrived via any other means than air travel.
On the 17th, there are only 7 arrivals. The first six are at 7AM, 7.30AM, 9.10AM, 9.40AM, 12.35PM and 1.45PM and all come from Manila. The final flight is at 2.20PM and comes from Cebu, also a viable entry point if we assume teams will connect in South-East Asia.
On the 18th, we have an extra Manila flight at 9.25AM but no Cebu flight.