Auto insurance is obviously different depending on the type of coverage you buy, but since the national average expenditure for car insurance is $795 a year and PA's average is $820, it can easily be inferred that Pennsylvanians are likely to pay a bit more on average for just about any type of coverage.
To answer that question, airfare shopping engine CheapAir.com monitored fares for more than 4 million flights in 2013 over a booking period ranging from 320 days in advance to one day in advance. Its researchers found that fares for domestic flights were lowest 54 days in advance.
-- Check with discount airlines for cheaper fares. -- Try to book as far in advance as possible. Generally try to purchase your tickets at least 21 days in advance of departure. Many airlines also have specials requiring three-, seven- or 14-day advance purchase. International flights should try to be booked at least 2 months in advance for the best rates though.