Editing Flight number (section)

==Flight number conservation==
Airline mega mergers, in markets such as the United States, have made it necessary to break conventional flight numbering schemes. Organizations such as IATA, ICAO, ARC, as well as [[CRS system]]s and the FAA's ATC systems limit flight numbers to four digits (0001 to 9999). The pool of available flight numbers has been outstripped by demand for them by emergent mega-carriers. As such, some carriers use the same flight number for back-and-forth flights (e.g., [[Washington-National|DCA]]-[[Palm Beach International Airport|PBI]]-DCA), or in other cases carriers have assigned a single flight number to a multi-leg flight (e.g., [[Wichita Dwight D. Eisenhower National Airport|ICT]]-[[Dallas Love Field|DAL]]-[[Houston Hobby Airport|HOU]]-[[Chicago Midway International Airport|MDW]]-[[Eppley Airfield, Omaha|OMA]]-[[Denver International Airport|DEN]]-[[Albuquerque International Sunport|ABQ]]-[[Harry Reid International Airport|LAS]]-[[Bradley International Airport|BDL]]).<ref>{{cite web |title=The Science behind Flight Numbers |url=https://community.southwest.com/t5/Southwest-Stories/The-Science-behind-Flight-Numbers/ba-p/42760 |website=southwestaircommunity.com |access-date=March 3, 2019 |language=en |date=June 9, 2015}}</ref>