September 10/11th

Mohamed Atta - picked up al-Omari at the Milner on 10th in Blue Nissan and drove to a Comfort Inn outside Portland Jetport, where they drove in the morning
Satam al-Suqami - unknown travel from the Milner to Logan
Waleed al-Shehri - unknown travel from the Park Inn, registered to himself, in Chestnut Hill, Mass.
Wail al-Shehri - unknown travel from the Park Inn in Chestnut Hill, Mass.
Abdulaziz al-Omari - was at the Milner on 10th, Atta picked him up in Blue Nissan and drove to a Comfort Inn outside Portland Jetport, where they drove in the morning

Marwan al-Shehhi - drove the Mitsubishi Mirage from the Milner to Logan
Fayez Banihammad - drove rental car #1 with Mohand from the Milner to Logan
Mohand al-Shehri - passenger in rental car #1 with Banihammad
Hamza al-Ghamdi - shared taxicab from "Days Hotel" in Brighton, Mass.
Ahmed al-Ghamdi - shared taxicab from "Days Hotel" in Brighton, Mass.

Hani Hanjour - passenger in the Toyota Corolla driven by Nawaf
Khalid al-Mihdhar - passenger in the Toyota Corolla driven by Nawaf
Majed Moqed - was at the Budget Host Valencia Hotel in Laurel, Maryland with Hani, both checked out on the 10th
Nawaf al-Hazmi - drove the Toyota Corolla with Hanjour and al-Mihdhar from the Marriott Residence Inn in Herndon, Virginia to Dulles.
Salem al-Hazmi

Ziad Jarrah - dropped off by Mitsubishi Gallant with another man at Airport Marriott (3rd floor), a third man drives to Days Inn, presumably picked up and taken to Newark airport the same way.
Ahmed al-Nami
Saeed al-Ghamdi
Ahmed al-Haznawi - dropped off with Jarrah at Marriot(3rd floor)[1], presumably picked up and taken to Newark airport the same way.

Why would one hijacker prefer a Days Inn (they're almost beside each other), possibly because the Marriott was opulent and high-class, or possibly because the 4th hijacker was already staying there. al-Nami and Saeed were friends who had attended Al Farouq together in the summer of 2000.