I flew back and forth with my baby twice in a matter of two weeks when she was 3-4 months old. I had 5 flights altogether and only one was so full that I couldn't take the carseat on even though I didn't buy her a seat. Ask that at the counter when you check in!
I always checked her stroller right away at the gate, but still had to lug it down myself. It's hard to juggle all that stuff when you're traveling alone with the baby!
... View more