Hi. What's the easiest way to travel from Zhenjiang to Pudong International Airport for a late night flight?

Hi, Glenys.
May I know what is your departure time?
Generally speaking, you can take a G-train from ZJ to Shanghai Railway Station and then take the pudong airport shuttle bus line 5 to reach Pudong airport.

If you can tell me your more specific departure time, I can tell you more detail information.