Aviation American opens Flagship Lounge at O'Hare By Robert Silk / September 15, 2017 Share 1 -- American Airlines has opened a new Flagship Lounge at Chicago O'Hare. It's the second Flagship Lounge to open since American decided to revamp its first-class lounges while opening the lounges to flyers in international business class. The O'Hare Flagship Lounge, located in Terminal 3 H/K, is open from 3:30 a.m. to 10 p.m. It is 17,000 square feet and has 300 seats. Among the lounge's offerings are showers, quiet rooms and what American spokeswoman Sunny Rodriguez called "endless amounts of outlets."Dining options include a hot and cold buffet, a manned station where Italian beef sandwiches are made to order, and a self-serve wine and champagne bar. The O'Hare lounge does not have Flagship First Dining -- the complimentary full-service restaurant that is available to first-class international travelers at the JFK lounge that opened in May. Flagship Lounges are expected to open in Miami and Los Angeles later this year. Each will offer Flagship First dining.