weekday round trips. Jet airline service resumed on November 14, 1971, when Southwest Airlines operating as an intrastate airline began nonstop Boeing 737-200s to Dallas Love Field (DAL) and San Antonio (Southwest had initially launched service between Intercontinental Airport and Dallas Love Field before serving Hobby). Both Braniff International and Texas International resumed jet service into Hobby with nonstops to Dallas in competition with Southwest. By fall 1979, Braniff and Texas International had ceased serving Hobby, however, two other jet airlines, Hughes Airwest and Ozark Air Lines, had joined Southwest at the airport, with Southwest operating Boeing 727-200s as well as 737-200s nonstop to Austin, Corpus Christi, Dallas Love Field, Harlingen, Lubbock, San Antonio and its first destination outside Texas, New Orleans. Hughes Airwest (owned by Howard Hughes) was flying nonstop to Las Vegas, Phoenix and Tucson and direct to Burbank (now Bob Hope Airport) and Orange County (now John Wayne Airport) while Ozark was flying nonstop to its hub in St. Louis; both airlines flew McDonnell Douglas DC-9-30s. Hughes Airwest was acquired by and merged into Republic Airlines which in 1983 had a focus city operation at Hobby with McDonnell Douglas DC-9-30s, DC-9-50s and MD-80s nonstop to Chicago O'Hare Airport (ORD), Dallas/Fort Worth (DFW), Detroit, Las Vegas, Memphis, New Orleans and Phoenix. By 1984, another airline flew nonstop Hobby to St. Louis: Air 1 Boeing 727-100s. A number of commuter airlines were flying from Hobby to smaller cities in Texas and Louisiana, including Chaparral Airlines, Commutair, Eagle Commuter, Hammonds Air Service, Metroplex Airlines and Tejas Airlines. In 1987, Continental Airlines had a "dual hub" operation in Houston with a hub at Intercontinental Airport (IAH) and a second hub at Hobby. In February 1987, Continental had nonstops from Hobby to Austin, Denver, Las Vegas, Los Angeles, Miami, New Orleans, New York LaGuardia Airport, San Antonio and Washington D.C. National Airport. Nonstop "cross town" shuttle service was also being flown between HOU and IAH with Douglas DC-9-10s by Emerald Air operating as the "Houston Proud Express" or Continental with these flights using "CO" flight numbers with seven round trips a day. CO one-stops flew from Hobby to Bozeman, MT, Orlando, Sacramento and Tucson. Continental was operating up to 37 departures a day from HOU with Boeing 727-100s, 727-200s, 737-200s, 737-300s, Douglas DC-9-10s and McDonnell Douglas DC-9-30s. The airline shut down its hub at Hobby and was not serving the airport by