Dynamic pricing is applied by the airlines, which implies that the fares of the business classes vary during the week. Competitive routes have a tendency of getting unexpected price cuts, particularly during slow travel periods. Discounts on business class flights are often grabbed by the travelers who monitor such changes before being sold out. Fare-tracking booking engines assist in recognizing the appropriate time. There are also group booking schemes or by utilizing low cost seat upgrade schemes at the airport. https://askforairlines.com/blog/discounts-on-business-class-flights/