We have the same stroller, but we haven't flown with it. I would recommend you take off the jump seat and put it in your checked luggage, and just check at the gate your stroller as a single. I would be worried with the jumpseat it would get damaged. They throw that stuff around. If you are worried about your daughter at the airport etc, I would get her an animal (backpack) harness so you can keep her close without the worry. She is old enough to walk through the airport though, and then you can have your hands free with the youngest in the stroller. Then, once you get your luggage, you have your regular double stroller. We have checked at the gate a large jogging stroller without any problem. (They did manage to crack the buckle on it) so I would suggest you tuck the straps in the best you can. We just took a trip to NY over the holidays and ended up just taking an umbrella stroller because I was afraid they would damage my double that I use constantly at home. (My son was also 3 when we took the trip and my daughter was 19 months.) Honestly the hardest part about the airport was managing all our carry on luggage. Good luck. It is so hard traveling with kids.