L.M.
Well, from my experience flying and such it is easier for baby baby to adjust when eating. The chewing, swollowing and sucking actions actually help pop your ears (you can do just one to get the pop not all three are always needed.). Just give your darling a snack and water or something like that. The reason that chewing, swollowing and sucking actions help pop ones ears is because babies inner ears and eustachian tubes are not fully developed (this is the reason kids get ear infections too!) and those actions force a harmless and painless pressure change in the inner ear. From my experience a child that has few ear infections has little to no trouble with altitudes.