United Airlines provides different mediums for booking business-class flights. Passengers can book by visiting the official website of United Airlines or by speaking to a live person at customer service. Further, to do so, travelers need to make a United Business Class booking request from the booking section and then fill in all the required details, like arrival and departure place and journey date, along with contact details and personal information. After that, a quote form will appear, if one is okay with that, then lastly, passengers have to make the payment to complete the booking.