Hi, we took DD to America last year when she was 3 and a half months. She handled it very well. We asked our travel agent to book our flight to leave at night because DD was a great sleeper at night. The planes have sections that bassinets can be attached to so make sure you ask about that. As for pressurizing her, I had been told the best way was to BF or Bottle feed her while taking off and landing. As she was not due at these times, I used a syringe with some water in it to make her swallow. We had no problems with her at all.

Hope this helped a little.