Complete Guide to Chicago O'Hare Airport - Terminals, Lounges and Layover Tips

1Terminal Overview

O'Hare has four terminals. Terminal 1 is the main United Airlines terminal with concourses B and C. Terminal 2 handles Delta Air Lines, Air Canada, and some United Express flights, with concourses E and F. Terminal 3 is the American Airlines terminal with concourses G, H, K, and L. Terminal 5 is the international terminal serving all foreign carriers and some domestic low-cost flights.

The Airport Transit System (ATS) automated train connects Terminals 1, 2, and 3. These three terminals are also connected by underground walkways, and you can walk between them without leaving security. Terminal 5 is separate and requires taking the ATS train outside of security, meaning you must clear security again upon arrival.

Terminal 1 is the most modern following United's renovations, with updated gate areas, better dining, and improved amenities. Terminal 3 is the largest by gate count. Terminal 2 is the smallest and connects the other domestic terminals. Terminal 5 has been expanded but remains the most spread out.

2Getting To and From the Airport

The CTA Blue Line train runs directly from O'Hare to downtown Chicago (the Loop) in about 45 minutes. The fare is 5 USD and trains run every 5 to 10 minutes during the day. The station is located in the basement of Terminal 2, accessible from all domestic terminals. This is by far the best value and often the fastest option, especially during rush hour when roads are congested.

Metra commuter rail does not serve O'Hare directly, but bus connections are available to nearby Metra stations. The Pace Bus system provides suburban connections from the airport.

Taxis to downtown Chicago use a flat rate of about 40 to 50 USD and take 30 to 60 minutes depending on traffic. Rush hour traffic on the Kennedy Expressway can be brutal, so plan accordingly. Uber and Lyft are available with pickup at the designated ride-share areas. Fares to downtown typically run 25 to 45 USD.

Go Airport Express shared shuttle runs to downtown hotels for about 32 USD per person. Rental cars are available at the Multi-Modal Facility connected via ATS.

3Airport Lounges

The United Club has three locations at O'Hare in Terminal 1. The largest is in Concourse C near gate C18, offering food, drinks, WiFi, and workspaces. Day passes cost about 59 USD. The newly opened United Polaris Lounge in Terminal 1 is exceptional, with a full-service restaurant, premium bar, shower suites, and rest pods for business class passengers.

American Airlines operates the Admirals Club in Terminal 3, with locations in Concourses H and K. These offer standard lounge amenities with day passes from about 65 USD. The Flagship Lounge in Terminal 3 serves first and business class passengers with upgraded dining and service.

The Centurion Lounge by American Express is in Terminal 3 and is one of the best independent lounge options, with excellent food and cocktails. The Air France Lounge and British Airways Lounge in Terminal 5 serve premium passengers on their respective airlines. The USO Lounge in Terminal 2 is available free of charge for active military and their families.

4Where to Eat and Drink

O'Hare has an impressive dining scene. Terminal 1 features Tortas Frontera by celebrity chef Rick Bayless, widely considered one of the best airport restaurants in America, with tortas and tacos from 10 to 16 USD. Publican Tavern offers craft beer and elevated pub food with dishes from 14 to 22 USD.

Terminal 3 has Chicago staples including a Garrett Popcorn shop and Gold Coast Dogs serving Chicago-style hot dogs from 7 to 10 USD. Woody's Chicago Style offers deep-dish pizza slices. Terminal 5 has more limited but decent options including Wolfgang Puck and Manchu Wok.

For budget options, McDonald's, Starbucks, and Dunkin' are found in multiple terminals. A classic Chicago hot dog and a drink will cost about 10 USD. Terminal 2 has the fewest dining options but includes a Starbucks and a couple of grab-and-go stores.

5Sleeping and Layover Tips

O'Hare is open 24 hours. The best areas for overnight sleeping are in Terminal 1, where some gate areas have padded benches. Terminal 3 has limited sleeping spots but is generally quieter late at night. The ATS connects domestic terminals throughout the night.

The Hilton Chicago O'Hare is connected directly to Terminal 2 via a covered walkway. If you need a proper bed during a long layover, this is the most convenient hotel option. Multi-hour day-use room rates are sometimes available.

For daytime layovers of 4 hours or more, the CTA Blue Line makes it easy to visit downtown Chicago. Millennium Park, the Art Institute, and the Magnificent Mile shopping district are all accessible within an hour of leaving the airport. Deep-dish pizza at Lou Malnati's or Giordano's is a must for first-time visitors. Even a few hours is enough to see the Bean and walk along the Chicago Riverwalk.

6Hotels Near the Airport

The Hilton Chicago O'Hare is directly connected to Terminal 2 and is the most convenient airport hotel. Rooms start from about 140 to 220 USD per night. The hotel has a restaurant, fitness centre, pool, and meeting rooms. You can walk to the terminal without going outside.

The Hyatt Regency O'Hare is a few minutes by shuttle from the terminals, with rooms from 120 to 190 USD per night. It is a full-service hotel with dining, a fitness centre, and good meeting facilities. The Marriott Chicago O'Hare is also shuttle-connected at 110 to 180 USD per night.

Budget options include the Holiday Inn Chicago O'Hare Area at 80 to 120 USD per night and the Best Western O'Hare at 65 to 100 USD per night. Both offer free airport shuttles. The Rosemont area near the airport also has entertainment options including restaurants and the Fashion Outlets of Chicago mall.

7Staying Connected

Free WiFi is available throughout O'Hare Airport via the Boingo network. Connect and follow the registration prompts. The service works well for browsing and messaging. Speeds are generally reliable, though they can slow down during peak travel periods.

Charging stations are available in all terminals, with the best coverage in Terminal 1. Many gate areas have built-in USB ports and power outlets. The lounges offer dedicated workspaces with reliable charging.

eSIM providers like Airalo offer US data plans for international visitors. A VPN is recommended when using airport WiFi for security. T-Mobile, AT&T, and Verizon stores are available throughout the Chicago area for physical SIM cards.

8Practical Tips

O'Hare is notorious for weather delays. Chicago winters bring snow and ice that can cause significant disruptions from November to March. Thunderstorms in summer can also lead to ground stops and delays. Always check your flight status before heading to the airport and consider booking connections with generous layover times.

Terminal 5 is physically separated from the other terminals. If you are connecting between a domestic flight and an international departure from Terminal 5, allow at least 2 hours. You will need to take the ATS train and clear security again at Terminal 5.

Left luggage storage is not readily available inside the terminals. Some third-party services operate near the airport. The Yoga Room in Terminal 3 offers a free space for stretching and meditation. The airport has a multi-faith chapel, nursing rooms, and pet relief areas in all terminals. Duty-free shopping is available in Terminal 5 for international departures.