In September, O'Hare International Airport (ORD) sees steady transatlantic demand with flexible scheduling for travelers bound for Athens. Peak departure days are mid-week for lower fares, while weekend flights often carry higher prices due to leisure travel. For Chicago-area flyers (including Milwaukee and Indianapolis), compare itineraries that connect through major European hubs for lower fares or opt for premium cabins if convenience is a priority. CTA and ride-share options are available 24/7; remember to arrive 3 hours before international departures to clear check-in and security efficiently. Use fare alerts and flexible dates to capture the best September deals from ORD to ATH.
September arrivals at Athens International Airport Eleftherios Venizelos (ATH) benefit from lower crowds and pleasant weather, making transfers to Athens center and Piraeus efficient. Travelers arriving from O'Hare International Airport (ORD) should allow at least 1.5–2 hours for passport control and luggage, then plan 30–60 minutes for the transfer to central Athens or up to 2 hours to reach Piraeus depending on traffic. Book ferries or domestic flights early if heading to Santorini, Mykonos or Heraklion, and take advantage of off-peak hotel rates and cultural sites throughout the city.