The U.S. aircraft register, updated daily
Routes and flights · the DOT's airline reports, August 2025 to July 2026

Chicago O'Hare International ⇄ Athens ORD–ATH

Airlines flew 670 flights between Chicago O'Hare International ORD in Chicago, IL and Athens, Greece ATH in Athens, GR in the twelve months to July 2026, both directions together: 168,091 passengers in 181,305 seats, 93% of them filled, and 6,177,591 pounds of freight. 5,463 miles, about 571 minutes in the air, on 3 airlines: American Airlines Inc. (340), United Air Lines Inc. (328), VistaJet Limited (2).

670
flights, twelve months
ORD-ATH: 337 · ATH-ORD: 333
168,091
passengers
93% of seats filled
5,463
miles
about 571 minutes airborne
3
airlines
3 aircraft types

Flights by month both directions

03162931244/257/2510/254/261247/26
By month, as a table
flights
4/251
5/25116
6/25120
7/25124
8/25122
9/25108
10/2549
11/251
2/261
4/2635
5/26110
6/26120
7/26124

Passengers by month

08,12316,24624,36832,4914/257/2510/254/2632,1077/26
By month, as a table
passengers
4/259
5/2529,716
6/2532,046
7/2532,491
8/2531,517
9/2527,870
10/2510,695
11/251
2/262
4/267,573
5/2627,499
6/2630,827
7/2632,107

The airlines twelve months, both directions

AirlineFlightsPassengersSeats filledService
American Airlines Inc. AA34074,13593%scheduled passenger service
United Air Lines Inc. UA32893,95392%scheduled passenger service
VistaJet Limited VJT2311%charter passenger service

The aircraft as the airlines report their types

AircraftFlightsSeats a flightPassengers
B787-800 Dreamliner37423581,427
Boeing 787-10 Dreamliner29431886,661
Bombardier Global 6000/Global Xrs2143

ORD → ATH this direction alone · flown April 2025 to July 2026

337 flights of 336 scheduled, 83,931 passengers in 91,210 seats, 546,594 pounds of freight, 134,095 pounds of mail. American Airlines Inc. 171; United Air Lines Inc. 165; VistaJet Limited 1.

ATH → ORD this direction alone · flown May 2025 to July 2026

333 flights of 336 scheduled, 84,160 passengers in 90,095 seats, 5,630,997 pounds of freight. American Airlines Inc. 169; United Air Lines Inc. 163; VistaJet Limited 1.

Source: the Bureau of Transportation Statistics' T-100 Segment table (all carriers). A flight is one departure performed on this segment; seats and passengers are the airlines' own monthly reports; "seats filled" is passengers divided by seats. The miles are the DOT's great-circle distance. Both ends: Chicago O'Hare International ORD and Athens, Greece ATH; all routes.