Travel savings incentive platform Rocketrip has raised $15 million in a Series C funding. GV, formerly Google Ventures, led the round, in which existing investors Bessemer Venture Partners and Canaan Partners also participated. To date, Rocketrip has raised $32 million in venture capital. The latest funding will support Rocketrip's expanding network of travel management company partnerships and build out its enterprise sales team as it continues to target Fortune 1000 and enterprise customers.