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Chicago actually has zero airports. We've looked at all your options and found that, usually, Chicago O'hare International Airport is the cheapest airport to fly into. You should also look out for flights with JetBlue – they often have the cheapest prices.
The cheapest airport to fly from is Paris Charles De Gaulle Airport, but we recommend booking in advance to get a good price.
If you need somewhere to stay, take a look at our hotel options – you can sometimes save even more when you book your accommodation with your flight. Even if you don’t book, the prices will give you a good indication of how much hotels cost in the USA.