Tokyo to Narita airport advice

Hi there!

What I would is take the Narita Express early from Tokyo station, this train will bring you from Tokyo to the airport in less than an hour. Ideally you would want to be at Narita Airport 2 hours before departure but a little less will do as well.

With your 9.40 flight in mind, I would recommend taking the Narita Express leaving Tokyo at 07:00. Which will give you enough time to catch some sleep before your flight back home.

I hope this helps!
Daniel