The cheaper remote lots — same rate as B, different field.
Long Term is where BWI puts the week-long trips. You will ride a shuttle. In the rain that matters; in July it is still faster than hunting Hourly. A and B charge the same. Use the board: pick the one that is actually open.
Covered garage on the terminal — the closest drive-up at BWI.
Covered overnight parking with a frequent shuttle to the curb.
A smaller lot with a free shuttle and a price between Daily and Long Term.
Same idea as Long Term A — remote, cheaper, shuttle required.
Trips of several days.
Free shuttle, 24/7.
About $11 a day. Confirm the rate on the gate sign — posted prices move.
Limited means you may still find a space if you circle, but another lot is the safer call. Full means that lot is not taking drive-up cars. Use the live board and pick the next BWI lot instead of waiting in the inbound loop.