Cervantes Ilocos Sur is located 399 kilometers North of Metro Manila. There are two choices of route that you can choose from
1.)Via Tagudin Ilocos Sur – From Manila you can take a bus going to Vigan. Some bus companies that ply this route are Partas, Viron, Dominion, Farinas. Bus stations are located at Pasay (nearest to the airport) Cubao and Manila. Pay for Bitalag Tagudin Ilocos Sur and alight at the intersection of Tagudin National Highway and Tagudin-Cervantes Road. From Tagudin there vans that you can ride going to Cervantes
Manila to Tagudin is about 8-9 hours and Tagudin to Cervantes is 2 hours.

Google Map:

2. Via Baguio City – From Manila, some of the buses that go to Baguio are Victory Liner and Dagupan Bus. From Baguio to Cervantes, you can take either the Rising Sun bus or a van. Stations for the bus and van are near each other. They are located near the slaughter house along Magsaysay Ave. Taxi drivers usually know the place.
Manila to Baguio is 6 hours while Baguio to Cervantes is 4 hours.