We've gone through lots of different flights, to help you find the cheapest way to get from Chicago O'hare International Airport to Philadelphia. You can choose from zero airlines.
If you can't find a flight time that suits you, why not look at flying out from a different airport?
Take a look at flight times to see which one works best for you.
Searching by month, for instance, will show you the best time of the week to fly.
