Officials at Logan International Airport are warning that it could be hard to find parking in coming days as schools in New England close for February vacation and families jet off to warmer climes. The demand for parking is “expected to exceed the number of spaces available,” said officials who held a press conference Wednesday. The officials advised people to consider taking the Logan Express Bus service or public transit to reach the airport. The officials also said that they are offering a Logan Express deal to make the service more attractive. For a family of four traveling for a seven-day vacation, the bus service would cost $44.Martin Finucane can be reached at firstname.lastname@example.org.