When should we return to Pudong Airport?

Hi,

I'm taking my niece on a trip to New Zealand and we're transferring through Shanghai twice (17h stay each). Since I've been too the city a couple of times I want to Show her around a Little - thinking about classics as SWFC, Yuyuan and Bund.
Now here's the question: Both our planes will be leaving at about midnight and I do know Maglev doesn't operate at late night, but taking Line 2 from Nanjingludong would work nicely. Considering the time it takes to get there, does anyone know, when one should return to Pudong Airport?

Thanks for your help!

Best