"Through December 31, 2005, 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 return flight*.

When traveling internationally, you can check in online for outbound and return flights to the U.S. from select cities. Save time at the airport by checking in online within 24 hours of your next Continental flight. Simply have your confirmation number ready. Here's what you can do in advance:

Review your reservation and itinerary
Change or review your seat assignment
Print or fax your boarding pass
You can check your bags at an airport kiosk or with a Continental ticket counter representative and least 60 + minutes prior to departure.
Click on blue line above. Then scroll down to-Earn 500 Bonus Miles Every Time You Check In offer "