United Airlines' missed flight policy varies based on ticket type. Non-refundable tickets usually result in forfeited fares, with rebooking options available for a fee. Refundable tickets offer more flexibility, potentially allowing rebooking or refunds based on fare rules. Flight delays or cancellations by United may lead to rebooking or compensation. Passengers must cancel reservations before departure to avoid no-show penalties, which may result in canceled reservations and forfeited fares. Review specific fare rules and contact United Airlines for assistance. Consider travel insurance for coverage against missed flights.