There are three direct and indirect flights connecting Philadelphia and Dallas every week, with the journey taking 10 hrs 50 mins on average. Scroll through your results to compare flight times and prices
Or, if you're fairly flexible on dates, try to get a last minute-deal by regularly checking the Netflights website.
In Dallas, Dallas/Fort Worth International Airport (DFW) is usually the cheapest airport to fly to, but there are one airports to choose from. Not sure who to fly with? Alaska Airlines are the most popular airlines available from Philadelphia.
But if you can't find one which is right for you, try looking at flights to other cities in the USA to check out some other options.