The flight from Chicago (ORD) to Frankfurt am Main (FRA) takes about 7h 21m nonstop on a widebody airliner, covering 4,331 miles (6,971 km).
Frankfurt am Main is 7 hours ahead of Chicago. You cross 7 time zones heading east. Eastbound trips like this one tend to be harder to adjust to, so plan for a day or two of jet lag.
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