Question: A small regional passenger airline from Killeen, Texas moved its operations from a city owned public airport 6 miles northwest of Downtown Dallas to what airport?

Passages:
Dallas Executive Airport (IATA: RBD, ICAO: KRBD, FAA LID: RBD) , formerly Redbird Airport, is a public airport six miles (10 km) southwest of Downtown Dallas, in Dallas County, Texas.  The airport is used for general aviation and is a reliever airport for Dallas Love Field.  In 2013, the Commemorative Air Force announced that they would build a "National Airbase" at Executive which would include their headquarters and main museum, both of which would be moved from Midland. Waterloo Regional Airport (IATA: ALO, ICAO: KALO, FAA LID: ALO) , also known as Livingston Betsworth Field, is a city owned public use airport located four miles (6 km) northwest of the central business district of Waterloo, a city in Black Hawk County, Iowa, United States.  It is mostly used for general aviation and is also served by one commercial airline. Mohawk Airlines was a regional passenger airline operating in the Mid-Atlantic region of the United States, mainly in New York and Pennsylvania, from the mid-1940s until its acquisition by Allegheny Airlines in 1972.  At its height, it employed over 2,200 personnel and pioneered several aspects of regional airline operations, including being the first airline in the United States to hire an African American flight attendant in 1958.  The airline was based at Ithaca Municipal Airport near Ithaca, New York until 1958, when it moved to Oneida County Airport in Whitestown, New York. Perham Municipal Airport (FAA LID: 16D) is a city owned public use airport located two miles northwest of the central business district of Perham, a city in Otter Tail County, Minnesota, United States. Riverton Regional Airport (IATA: RIW, ICAO: KRIW, FAA LID: RIW) is a city owned, public use airport located three nautical miles (6 km) northwest of the central business district of Riverton, a city in Fremont County, Wyoming, United States.  The airfield also serves nearby Lander, Wyoming with regard to scheduled passenger airline flights.  It is mostly used for general aviation, but is also served by two commercial passenger airlines.  Service was subsidized by the Essential Air Service program until October 2006, when Great Lakes Airlines began providing subsidy-free service.  Key Lime Air operating as the Denver Air Connection began serving the airport with regional jet aircraft on July 1, 2016. Dallas Love Field (IATA: DAL, ICAO: KDAL, FAA LID: DAL) is a city-owned public airport 6 miles (10 km) northwest of downtown Dallas, Texas.  It was Dallas' main airport until 1974 when Dallas/Fort Worth International Airport (DFW) opened. Skylark Field (IATA: ILE, ICAO: KILE, FAA LID: ILE) is a city owned, public use airport located three nautical miles (6 km) east of the central business district of Killeen, a city in Bell County, Texas, United States.  It is included in the National Plan of Integrated Airport Systems for 2011–2015, which categorized it as a "general aviation" facility.  It was formerly known as Killeen Municipal Airport. Huron Regional Airport (IATA: HON, ICAO: KHON, FAA LID: HON) is a city owned public airport in Huron, within Beadle County, South Dakota.  It recently had scheduled passenger flights operated by a commuter air carrier, Great Lakes Airlines, with service to Denver subsidized by the Essential Air Service (EAS) program; however, Great Lakes no longer serves Huron.  The airport serves as a backup site for Sioux Falls Regional Airport. Rio Airways was a regional passenger airline headquartered in Killeen, Texas, United States, which was operational from 1967 to 1987.  Rio Airways briefly operated code sharing flights on behalf of Delta Air Lines whereby Rio flights were booked and sold under the Delta Connection brand name.  Prior to the Delta Connection service, Rio Airways (Code "XO") operated independently but shared terminal gates at the DFW airport first with Texas International Airlines (1974), then with Braniff (1975-1978).  Prior to operations at DFW it operated at Dallas Love Field, having its roots in two smaller commuter air carriers, Dal Airways and Hood Airways. Marfa Municipal Airport (IATA: MRF, ICAO: KMRF, FAA LID: MRF) is a county owned public use airport located three nautical miles (6 km) north of the central business district of Marfa, a city in Presidio County, Texas, United States.  The airport serves private aircraft and has no scheduled passenger airline service at the present time.

Supporting sentences:
 Prior to operations at DFW it operated at Dallas Love Field, having its roots in two smaller commuter air carriers, Dal Airways and Hood Airways. Dallas Love Field (IATA: DAL, ICAO: KDAL, FAA LID: DAL) is a city-owned public airport 6 miles (10 km) northwest of downtown Dallas, Texas.  It was Dallas' main airport until 1974 when Dallas/Fort Worth International Airport (DFW) opened.