Has anyone used an infant car seat on a Jet Blue flight and if so, which one? My son's infant seat is very big (Graco Safe Seat) and I'm afraid it will be too big to fit in the airplane seat. We will eventually buy him a convertible carseat (probably a Britax Roundabout), but I'd rather use an infant seat for this trip. Our trip is in April and he will be almost 6 months old at the time, so I'd prefer to use an infant seat (we'll need it for restaurants since he probably won't be sitting up on his own yet). I'd love to hear from anyone who has used an infant seat on Jet Blue. Thanks! P.S. I have emailed Jet Blue to ask about seat dimensions, but I haven't heard back from them yet.