TSA pre-screening is available. If you have applied to the TSA’s expedited pre-screening program and are flying on an itinerary wholly within the United States, please visit the TSA designated pre-screening checkpoints for security screening.
https://www.united.com/web/en-US/content/travel/airport/maps/ord.aspx
Use the information provided in this website to plan your travel through Chicago O'Hare Airport. Find all the information regarding O'Hare Airport: Flights (Departures, Arrivals and Delays), Parking, Hotels and Accommodation, Rental car information, Transport and other important information .
http://www.airport-ohare.com/
O’Hare International Airport was voted the Best Airport in North America for 10 years, by readers of the U.S. Edition of Business Traveler Magazine (1998 - 2003) and Global Traveler Magazine (2004 - 2007).
http://www.airport-ohare.com/
O'Hare International Airport (IATA: ORD, ICAO: KORD, FAA LID: ORD),also known simply as O'Hare Airport, is an airport located in Chicago, Illinois, 17 miles (27 km) northwest of the Chicago Loop. It is the largest hub of United Airlines and the second-largest hub of American Airlines.
http://www.airport-ohare.com/
Chicago O'Hare International Airport (ORD) Security Checkpoint 3 in Terminal 1 is temporarily closed. Priority security lines for MileagePlus Premier® members, Star AllianceTM Gold members, military personnel, customers with disabilities requiring assistance and employees have moved to Security Checkpoint 2. If you're departing from Chicago, please allow extra time for security processing.
https://www.united.com/web/en-US/content/travel/airport/maps/ord.aspx
Traveled our of Chicago through this airport. I have to say the security lines were pretty annoying and confusing. We stood in one line and then 5 mins later were directed to another security line at the end of the building. It would have been nice to have that knowledge or direction before we stood in line.
https://www.yelp.com/biz/o-hare-international-airport-chicago-9
Chicago O'Hare International Airport. Chicago, Illinois, USA. 1  CLASS B FREQS 120.55/290.2 FOR VFR AIRCRAFT REQUESTING TRAFFIC ADVISORIES OR TO TRANSITION CLASS B NORTH OF OHARE.  CLASS B FREQS 133.5/349.0 FOR VFR AIRCRAFT REQUESTING TRAFFIC ADVISORIES OR TO TRANSITION CLASS B SOUTH OF OHARE.
https://www.airnav.com/airport/ORD
I have frequented O'Hare many times over the years & most recently this past year. Hands down, it is my favorite airport in the United States. I appreciated their direct flight to Edinburgh, Scotland, although United was (of course) having issues with their plane.
https://www.yelp.com/biz/o-hare-international-airport-chicago-9
The airport is connected to Chicago by train using the Blue Line of Chicago 'L'. It runs 24 hours a day. The transit time from Central Loop to O'Hare International airport is approximatemily 40 minutes.
http://www.airport-ohare.com/
I've been flying in and out of O' Hare now for my job. The airport is pretty decent in terms of ease of getting to. Usually I fly Delta, which is in terminal 2, and I haven't had a problem getting into the airport. The agents are very helpful with getting your bag checked, and the TSA precheck lines are usually short.
https://www.yelp.com/biz/o-hare-international-airport-chicago-9
what airport is ord?
ORD is O'Hare International Airport.