We've gone through lots of different flights, to help you find the cheapest way to get from Chicago O'hare International Airport to Frankfurt. 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.
You can also search by month, which will reveal the cheapest time of the week to fly.
