Deutsche Lufthansa is an aviation group based in Germany. Co. maintains global operations and a total of more than 500 subsidiaries and associated companies. Co. operates in five major business segments: scheduled passenger air traffic ("Passenger Airline Group"); scheduled airfreight services ("Logistics"); maintenance, repair and overhaul ("MRO"); information technology ("IT Services") and catering ("Catering").

EasyJet and its subsidiaries are a low-cost airline carrier operating principally in Europe. Co. operates in the European short-haul aviation market. As of Sept 30 2017, Co. operated 862 routes. Co.'s total fleet as at Sept 30 2017, comprised 279 aircraft, split between 156-seat Airbus A319s, 180-seat A320s, 186-seat A320s and 186-seat A320neos. Co.'s main markets are the U.K., France, Italy, Switzerland, Germany, Netherlands, Portugal and Spain.

International Airlines Group is an international scheduled airline and global premium airlines. Co.'s principal place of business is London with significant presence at Heathrow, Gatwick and London City airports.

Ryanair Holdings is a holding company. Through its subsidiaries, Co. operates an ultra-low cost, scheduled-passenger airline serving short-haul, point-to-point routes between Ireland, the U.K., Continental Europe, and Morocco. Co. offers over 2,000 scheduled short-haul flights per day serving approximately 210 airports throughout Europe, and flying approximately 1,600 routes. In addition, Co. provides various ancillary services and engages in other activities connected with its core air passenger service, including non-flight scheduled services, Internet-related services, and the in-flight sale of beverages, food, and merchandise.

Wizz Air Holding is a European airline. As of Mar 31 2017, Co. provided more than 500 routes from 28 bases, connecting 141 destinations across 42 countries. Co. has two reportable segments: the airline and the tour operator business units, marketed under the Wizz Air and Wizz Tours brand names, respectively. Wizz Air sells flight tickets and related services to external customers and, to an extent, to Wizz Tours. Wizz Tours sells travel packages to external customers covering the network of Wizz Air.