Through Dec. 31, Continental OnePass members can earn up to 1,500 bonus miles for using the booking and check-in features at http://www.continental.com. Each time you book your ticket at continental.com, you’ll earn 500 bonus miles. And through Dec. 31, you’ll receive 500 bonus miles and a complimentary inflight headset coupon each time you use continental.com to check in for your outbound and for your return flight.