how long is flight from chicago to lisbon

The flight duration from Chicago to Lisbon can vary depending on factors such as the specific flight route, layovers, and weather conditions. On average, a nonstop flight from Chicago O'Hare International Airport to Lisbon Portela Airport takes approximately 8 to 9 hours. However, if you have layovers or choose connecting flights, the total travel time can be longer. It's advisable to check with airlines for the most accurate and up-to-date information on flight durations and schedules to plan your trip accordingly.