In 2026, whether a stroller is considered a "carry-on" depends entirely on its size when folded. Ultra-compact strollers (like the Babyzen YOYO or Ergobaby Metro+) that meet standard overhead bin dimensions (roughly 56cm x 36cm x 23cm) are typically permitted to be brought into the cabin as a carry-on item. These do not count toward your standard baggage allowance as they are classified as "assistive devices" or "special items" for infants. However, most standard-sized strollers are too large for the cabin and must be "Gate Checked." This is a free service where you use the stroller through the airport until you reach the aircraft door, at which point a ramp agent takes it to the cargo hold. Upon landing, the stroller is returned to you at the aircraft door. For 2026 travelers, it is a "pro" tip to use a durable stroller bag when gate-checking to prevent damage or dirt. If you have a massive "jogger" style stroller, most airlines will require you to check it at the main ticket counter as standard luggage, though it is still usually free of charge for those traveling with a child.