It should be more than enough time to take the shuttle from long-term parking and get through security, especially if you can use the kiosk vice checking in with a ticket agent. If you are not checking any bags, remember to print-out your BP from home, and at the airport you can go straight to security. Also, BWI has a frequent traveller line through security, so if you are PM, a CRC member, or flying F/C, you should have a much easier and shorter time of it.