Surf Air Mobility is trading 10.52% higher at $0.98 after announcing a definitive OperatorOS agreement with Clipper Aviation on October 6. - It is the company’s fourth commercial OperatorOS contract; Surf Air Mobility will earn a percentage of revenue from Clipper flights managed through the software. - The agreement advances its goal of five operators live on the platform by year-end. - Airline stocks are also higher amid positive analyst commentary, but the Clipper contract is the more direct explanation for the gain.