The average time is 14-15 hours.
A random search for flights from Frankfurt (FRA) to Chicago OHare (ORD) shows: OPTION 1: 9hr 10min Nonstop (Fastest & cheapest flight) FRA - ORD Air India Flt 127 Dep 08:40am Daily Flight Duration: 9hr 10min
A flight leaving Chicago OHare on United going to Addis Abbaba takes over 37 hours, passing through Frankfurt, Germany, Khartum, and Sudan. If your flight left on a Wednesday night, for example, you would be on the ground in Ethipoia a little earlier on Friday evening Ethipia time.
Chicago Ohare to Grand Rapids is about 45 minutes.
8hr 35min Manchester (MAN) to Chicago OHare (ORD) by a nonstop flight operated by American Airlines.
12hr 57min Beijing Capital (PEK) to Chicago OHare (ORD) by a nonstop flight operated by United Airlines.
A non-stop flight from Chicago Ohare to Orlando Florida is a little over two hours.
4hr 05min to 4hr 10min San Jose (SJC) to Chicago OHare (ORD) by a nonstop flight operated by American Airlines.
11hr 50min Chicago OHare (ORD) to Amman (AMM) by a nonstop flight operated by Royal Jordanian.
12hr 00min Chicago OHare (ORD) to Amman (AMM) by a nonstop flight operated by Royal Jordanian.
14hr 10min Chicago OHare (ORD) to Seoul Incheon (ICN) by a nonstop flight operated by Korean Air.
Chicago's O'Hare airport is one of the busiest in the country. If you are looking for a direct flight from Chicago to Baton Rouge, there are no direct flights between the two cities.
11hr 26min to 11hr 55min Tokyo Narita (NRT) to Chicago OHare (ORD) by a nonstop flight operated by United Airlines, ANA, Japan Airlines or American Airlines.