My daughter is doing a semester abroad in Strasbourg and we are trying to book her return trip. Singapore Airlines has a cheap nonstop from Frankfurt to JFK (with free 2nd bag!) but it's an early morning flight (8am). She has been told that there is a bus run by Lufthanza, which is the most convenient, but it looks like she'd probably have to take the last bus out in the evening the day before and just hang out at the airport overnight. Any info/suggestions about the bus or alternatives and about safety and comfort at the Frankfurt airport overnight for a 20yr old college student? If she can't check her bags in early, is there any type of luggage storage at Frankfurt? Thank you.