To determine first and second checked baggage service charges for your itinerary, use the baggage calculator below. Please note that as required by U.S. Department of Transportation regulations, baggage service charges for your entire itinerary are determined by the marketing carrier for the first segment of your itinerary. Your originating marketing carrier is the airline whose flight number is assigned to the first segment of your itinerary. If this carrier is not United or United Express, different charges may apply. Baggage service charges are based on the date of ticketing.