Is Chicago International airport big?

Chicago O'Hare International Airport, sometimes referred to as Chicago O'Hare, or simply O'Hare, is the main international airport serving Chicago, Illinois, located on the city's Northwest Side, approximately 17 miles northwest of the Loop business district.



Yes, Chicago O'Hare International Airport (ORD) is immense, consistently ranking as one of the top 10 largest and busiest airports in the world. In 2026, it covers approximately 7,627 acres (31 square kilometers) and features eight active runways—the most of any civilian airport. While it is physically smaller than "land giants" like Denver or Dallas/Fort Worth, O'Hare is "big" in terms of its massive connectivity, serving nearly 250 non-stop destinations globally. It is a dual-hub for both United and American Airlines, with four massive terminals (1, 2, 3, and 5) and over 210 gates. For 2026 travelers, the "size" of O'Hare means you should allow at least 90 minutes for any connection, especially if you have to move from the domestic terminals to the international Terminal 5. Its scale is so vast that it even has its own internal "Automated People Mover" (ATS) train system to ferry passengers between the terminals and the massive multi-modal transit hub.

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O'Hare International Airport is the largest airport in Chicago. It has 4 terminals and offers roughly 568 daily non-stop flights to 154 U.S. cities and 45 daily non-stop flights to international destinations in Asia, Europe, North America, and South America.

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Terminals. O'Hare has four numbered passenger terminals with nine lettered concourses and a total of 213 gates. Terminal 1 is used for United Airlines flights, as well as international departures by Lufthansa and All Nippon Airways. It contains 52 gates on two concourses, lettered B–C.

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Generally, the first three terminals are considered domestic terminals and are easily traversed. All three of these terminals are connected by pedestrian walkways, making them so much easier to cross than having to wait for transportation to take you to them.

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At 53 square miles, Denver International Airport is the biggest airport in the United States and the second largest in the world.

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Dallas/Fort Worth International Airport (DFW) — Dallas, Texas. Situated in the Texas prairie between the major cities of Dallas and Fort Worth, DFW airport, the third largest airport in the world, may be quite familiar to American Airlines passengers.

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In general, that should be fine. My understanding is that the minimum connecting time at O'Hare is 40 minutes, which generally means that the airlines expect to need 40 minutes to allow you enough time to get between flights as well as get your baggage to your next flight.

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Larger airports, such as O'Hare and Midway in Chicago, ask that passengers arrive at least 90 minutes prior to departure especially if a traveler needs to go to the check-in counter for any reason (i.e., check baggage, etc.).

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Arriving at Terminal 1, 2 or 3 Passengers can check the screens for their flight number and gate location. The domestic terminals are all connected and are easy to get from one to the other.

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If you arrive on an international flight (excluding those who have arrived from a preclearance airport), you must clear U.S. Customs and Border Protection (CBP) checkpoints and claim all checked luggage before being allowed to enter the United States, including travelers with connecting flights.

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O'Hare became famous during the jet age, holding the distinction as the world's busiest airport by passenger traffic from 1963 to 1998; today, it is the world's fourth-busiest airport for passenger counts, serving 54 million passengers in 2021.

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The disadvantages of flying through O'Hare are that the airport is one of the busiest in the world, thus it can be very difficult to navigate, take a long time to pass through all of the checkpoints and walk from your gate to your lounges.

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HND — Tokio-Haneda, Japan — 85.51 million passengers. ORD — Chicago O'Hare International Airport, USA — 84.65 million passengers. LHR — London Heathrow, Großbritannien — 80.89 million passengers. PVG — Shanghai Pudong International, China — 76.15 million passengers.

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Chicago O'Hare International Airport is one of the busiest airports in the US (consistently in the top four for at least the past five years). It was developed as a major expansion for the city after the Second World War and saw huge growth when newly introduced jets moved away from Midway Airport.

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If your itinerary was purchased as one ticket (as in: you have only one itinerary and one confirmation number), and the connection time was too short and you miss the second (or third) flight, you can rest easy, no matter what happens. The airline will simply put you onto the next available flight, free of charge.

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24 hour layover in Chicago On a long layover, you can really get to grips with the city. An overnight layover means a hotel stay, but it also means you can experience the city's nightlife and dining scene.

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Atlanta Hartsfield-Jackson International Airport remains the busiest airport in the world with 5.2 million seats in September 2023. The composition of the Global Top 10 Busiest Airports is also the same as last month but there are a few changes to the rankings.

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KEY POINTS. Atlanta Hartsfield-Jackson International Airport remains the busiest airport in the world with 5.2 million seats in September 2023. The composition of the Global Top 10 Busiest Airports is also the same as last month but there are a few changes to the rankings.

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