the early 1990s although its regional affiliate Continental Express would return with "cross town" turboprop flights to IAH by the mid 1990s followed later by limited Continental mainline jet service. Also in 1987, Pan Am was once again serving Hobby with daily nonstop Boeing 727-200 and Boeing 737-200 service from the airport to Miami, New York JFK Airport and Washington Dulles Airport with the flight to New York continuing on a direct one stop, no change of plane basis to Bermuda. In the fall of 1991, the OAG listed main line flights to Hobby on American Airlines, Delta Air Lines, Northwest Airlines, Trans World Airlines (TWA) and United Airlines in addition to Southwest. Other airlines jets at Hobby in the 1980s included Air Florida, Braniff, Eastern Air Lines, Emerald Air (operating independently and also on behalf of Continental Airlines as the aforementioned "Houston Proud Express" with DC-9s between HOU and IAH), the original Frontier Airlines, Muse Air, People Express, Republic Airlines and TranStar Airlines. Alaska Airlines also served Hobby in 1990 via an interchange agreement with American Airlines which enabled direct Boeing 727-200s to Anchorage and Fairbanks via Dallas/Ft. Worth and Seattle. At one point, Continental Airlines was operating Boeing 737-300s between Hobby and Houston Intercontinental and flying nonstop HOU to its Newark hub. In 2008 the airport handled 8.8 million passengers. Only domestic US destinations and international destinations with border preclearance were being served, but in fall 2015 Southwest opened a new international terminal allowing it to fly to foreign cities. The headquarters for TranStar Airlines (formerly Muse Air before this new start up air carrier was acquired by Southwest Airlines) were at the airport. Muse Air followed by TranStar operated a hub at Hobby flying McDonnell Douglas MD-80s, DC-9-50s and DC-9-30s nonstop to Austin, Brownsville, TX, Dallas Love Field, Las Vegas, Los Angeles (LAX), Lubbock, Ontario, CA, McAllen, TX, Miami, Midland/Odessa, New Orleans, Orlando, San Antonio, San Francisco, Tampa and Tulsa with direct service to San Diego and San Jose, CA at various times during the 1980s. Several other airlines were based at the airport in the past as well, including Pioneer Airlines and Trans-Texas Airways (TTa) with the latter then changing its name to Texas International Airlines. Trans-Texas followed by Texas International operated a hub at the airport as well. Pioneer and Texas International merged with Continental Airlines, Pioneer in 1955 and Texas International in 1982. Continental