So we made our trip yesterday, and everything went well. TinyDancer was a champ walking through SeaTac and I ended up using the extra seat in the Sit-n-Stand to carry her car seat, the diaper bag, and the bottle cooler! I think this stroller is as useful for its ability to haul stuff as its ability to haul kids!! TiniestDancer slept in her infant bucket for most of the two flights, as I expected.