We've scanned every flight from Birmingham to Chicago to find the best deals. If you want a cheap flight, it's best to be as flexible as you can on dates. At the moment, the cheapest flight is on 13 / Sep / 2022. If that day's no good for you, try searching by month to see some alternative dates.
You can use the filters on your search to see more flights and find cheaper rates – Chicago has more than one airport. So if you don't need to fly into Chicago Midway Airport, it's worth checking your other options. The 6226 km flight usually takes about 15 hrs 40 mins.
There are about 60 flights to or via Chicago every week, so you have plenty of options.
If you're planning on going to Chicago during this time, you could take a look at other airport options. Or you could try to get a last-minute bargain.