I was reding EWs review of the episode, and Ken Tucker said this:
• The ad for Glatterflug airline that appears during one of the taxi scene is the same airline whose 2008 flight 627 landed at Logan airport with all its passengers dead in the pilot episode.
'Fringe' season premiere review: 'She's our Olivia now' | EW.com
Glatterflug was the aireline that said they have daily trips to the moon. But I totally didn't know it was the same airline as the flight from the Pilot! VERY INTERESTING. I wonder if that means anything, or if the writers were just trying to give us something to look for in the alternate universe.