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.
Book 49 days in advance. CheapAir.com combed through data on over 11,000 domestic flights to discover the optimum number of days in advance you should book airfare. According to the numbers, the sweet spot for most airfare is around 49 days, or seven weeks, in advance. Book further out around the holidays.