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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.
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