If you miss a connecting flight on United Airlines due to a delay that was the airline's fault (like a mechanical issue or crew scheduling), United is responsible for rebooking you on the next available flight to your destination at no extra cost. In 2026, the United app will often automatically push a notification with your new itinerary before you even land. If the next flight is not until the following day, United is required to provide you with a hotel voucher and meal credits. However, if you missed the flight due to a personal reason (like being distracted in a lounge) or a "force majeure" event like weather, the airline is not legally obligated to provide a hotel, though they will still help you rebook. If you are a high-tier MileagePlus member, you may have "Priority Standby" for the next departure. If the delay is significant and you choose not to travel, you may be entitled to a full refund under US DOT rules. It is always best to speak with a "Customer Service" agent at a United Premier desk or use the "Agent on Demand" feature in the app to see your options for switching to a different airport or a partner airline if the delay looks set to last several hours.