My doctor cleared us and gave me ways to prevent his ears from popping. Even though I didn't do it he was perfectly fine. Didn't cry or anything
I see you just did the same thing i did (posted on the older site to see if they would answer) I'm not sure but I would think that is too early only because of the ears popping when you get higher and higher
I traveled with my son at 3 weeks old (due to moving/military) and again to visit family when he was almost three months old