In the Fringe episode Olivia, there is a scene where Olivia stops the taxi and has the driver go and buy her clothes. Above the doors of the store, you can see a sign advertising Glatterflug airlines:
Daily Flights to the MoonThe name "Glatterflug" is butchered German for "Smooth Flight", and has been seen before in season 1. The Pilot episode's disastrous flight was aboard Glatterflug Flight 627, and Olivia even flew Glatterflug to Germany in the episode In Which We Meet Mr. Jones.
Don't give her diamonds, give her the moon.
The interesting fact here is that in the alternate universe, Glatterflug flies to the moon on a daily basis. On the other hand, they still use zeppelins. It's a strange world...