When you fly can have a big impact on the price you pay. When you're looking at airports, just bare in mind that a transfer to your accommodation will add an extra cost.
Searching by state instead of by city allows you to see a wider range of flights, which increases your chances of getting a good deal. Price wise, Delta Air Lines has the cheapest flights on average.
Compare the costs, flight times and airports to see which flight best suits your travel needs.