Search and book cheap flights from Chicago O'hare International Airport to Dallas with Netflights. There are one airlines offering flights in and out of Dallas, the most popular being Alaska Airlines.
This isn’t necessarily the case for your chosen dates, but it’s worth bearing in mind. There are two flights every week to Dallas, and the flight from Chicago O'hare International Airport normally takes about 10 hrs 55 mins.
Dallas has one airports, so you have more than one option. It could also be worth changing Chicago O'hare International Airport to include other airports, to see more flights and, possibly, better prices.
As well as helping you out with flights, Netflights can find you great prices on accommodation and car hire too.