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.
To give travelers a better idea of when to book a specific route, CheapAir took another look, this time analyzing about 3 million itineraries. Researchers found that, depending on the trip, the prime booking window -- when prices hover at their lowest points -- is anywhere from 112 to 21 days before a flight. (Fares go up sharply in the last two weeks before a flight, the site found.) Read next: What You Really Need to Know About When to Buy Flights.