due
问题描述：
due
China's three major airlines will raise jet fuel charges on international flights from next week.
The surcharge increase,due to start around October 1,will vary from route to route depending on the destination and airline.
答
The surcharge increase,（which is）due to start around October 1,will vary from route to route depending on the destination and airline.
不是due to,而是due to do sth...
预期做某事或到时间做某事...