Several US-based air carriers besides Northwest served the airport over the years as well. By 1975, Northwest Airlines was operating nonstop Boeing 727-100 jet service to both Anchorage and Minneapolis/St. Paul while Western Airlines was flying Boeing 727-200 and Boeing 737-200 jets direct to Denver, Salt Lake City and Great Falls (with all of these services first stopping in Calgary). Hughes Airwest also served the airport with Douglas DC-9-10 and McDonnell Douglas DC-9-30 jets on nonstop flights to Spokane as well as direct flights to Las Vegas and Los Angeles. By 1980, Hughes Airwest was operating five daily departures from Edmonton with Boeing 727-200 and McDonnell Douglas DC-9-30 jetliners with direct service via Calgary to Los Angeles, San Francisco, Las Vegas, San Diego, Phoenix, Tucson, Burbank, Reno, Boise, Spokane and Palm Springs. In 1981, Western Airlines was operating a daily nonstop Boeing 727-200 flight to Denver with continuing direct service to Phoenix and Los Angeles while Republic Airlines, which had acquired Hughes Airwest, flew daily nonstop Douglas DC-9-10 service to Las Vegas and Spokane. By 1982, Republic Airlines was operating all of its flights to the U.S. from Edmonton via an intermediate stop in Calgary with direct service to Las Vegas, Los Angeles, Phoenix, Spokane and Palm Springs. Also in 1982, Northwest was operating a daily Boeing 727-200 flight on a routing of Edmonton - Minneapolis/St. Paul - Chicago O'Hare Airport - Miami - Fort Lauderdale. United Airlines operated a daily Boeing 727-100 nonstop flight to San Francisco with direct one-stop service to Los Angeles in 1983. Western Airlines operated a Boeing 727-200 nonstop to Salt Lake City in 1987 with this daily flight providing direct one stop service to Los Angeles. Delta Air Lines then acquired and merged with Western with Delta continuing to operate nonstop service to Salt Lake City from the late 1980s to the mid 1990s, first with a Boeing 727-200 and later with a Boeing 757-200 with these flights providing direct one stop service to Los Angeles as well.