Major airlines
The airport is a base for scheduled airlines British Airways (BA), easyJet, Wizz Air, and charter operators such as TUI Airways. Gatwick is unique among London's airports in its representation of the three main airline business models: full service, low-cost and charter. As of October 2016, these respectively accounted for 26.6%, 61.3% and 13.1% of Gatwick's seat capacity.
By late 2015, easyJet flew over 100 routes from Gatwick with a fleet of more than 60 aircraft. The airport is the carrier's largest base and its 16 million passengers per year accounted for 45% of Gatwick's 2013 total (ahead of Gatwick's second-largest passenger airline: BA, whose 4.5 million passengers comprised 14% of total passenger traffic in 2011–12).
EasyJet, BA and Norwegian Air Shuttle were Gatwick's three biggest resident airlines, although in late 2020 Norwegian announced the closure of its base at Gatwick. According to data from Airport Coordination Limited, these three airlines respectively accounted for 43.3%, 19% and 10.5% of airport slots in April 2018. According to this data, by April 2018 Norwegian had overtaken Virgin Atlantic as Gatwick's number one transatlantic airline by seat capacity, and BA's competitive response to Norwegian's growing commercial threat to its transatlantic business would result in Virgin's relegation to third position among the airport's transatlantic airlines during the 2018 summer timetable period. easyJet, BA and Norwegian collectively accounted for 65.43% of Gatwick's total passengers in 2016 (easyJet: 40.37% / 17.4 million; BA: 14.39% / 6.2 million; Norwegian: 10.67% / 4.6 million). As per Official Airline Guide (OAG) data for the week of 29 May 2017, their respective international departure seat capacity shares at the airport for summer 2017 are 42.1%, 15.4% and 9.4%.
In terms of passengers carried easyJet and BA were also among the five largest airlines operating at Gatwick in 2010 (which also included TUI Airways and Thomas Cook Airlines at the time) and the top 10 in 2015. In terms of total scheduled airline seats at Gatwick in 2014, easyJet accounted for 18.36 million, more than two-and-a-half times as many as second-placed BA (7 million) and nearly five times the number offered by third-placed Norwegian Air Shuttle (3.74 million). Using data sourced from the OAG Schedules Analyser, the following changes in the respective departure seat capacity shares of Gatwick's three biggest airlines occurred from 2010 to 2015: easyJet's share increased from 26.1% in 2010 to 42.1% in 2015; BA's share dropped from 18.3% in 2010 to 15% in 2015; Norwegian's share rose almost three-fold from less than 3% in 2010 to 8.3% in 2015. easyJet, BA, Norwegian, TUI Airways, Ryanair, Thomas Cook Airlines, Monarch Airlines, Virgin Atlantic, Vueling and Emirates were Gatwick's top 10 airlines by share of passengers in 2017.
EasyJet's acquisition of BA franchise carrier GB Airways in March 2008 increased its share of airport slots to 24% (from 17% in late 2007); the airline became the largest short-haul operator at the airport, accounting for 29% of short-haul passengers. By 2009, BA's share of Gatwick slots had fallen to 20% from its peak of 40% in 2001. By 2010, this had declined to 16%. By mid-2012, easyJet had 45% of Gatwick's early-morning peak time slots (6 a.m. to 8:55 a.m.).
By 2008, Flybe was Gatwick's third-largest airline (accounting for 9% of its slots) and its fastest-growing airline. It became the airport's largest domestic operator, carrying 1.2 million passengers in its 2011–2012 financial year on eight routes to destinations in the UK, the Channel Islands and the Isle of Man. In March 2013, the airline announced that it would end operations at Gatwick, citing unsustainably high airport charges and increases in UK Air Passenger Duty. Flybe sold its 25 pairs of daily slots at the airport to easyJet for £20 million. The latter's share of Gatwick slots increased to 44% in summer 2014; second-placed BA has held about 16% of the airport's slots since 2010. Following the sale of its Gatwick slots to easyJet, Flybe continued to provide the scheduled service between Gatwick and Newquay, as a result of being awarded the contract to fly this route under a four-year Public Service Obligation (PSO), until the flight was subsequently moved from Gatwick to Heathrow Airport in April 2019.
Slots left by the US carriers (and the collapse of Zoom Airlines, Oasis Hong Kong Airlines, XL Airways UK, Sterling Airlines, Monarch Airlines, Thomas Cook Airlines and Adria Airways) were taken by easyJet, Flybe, Norwegian Air Shuttle and Ryanair. Many full-service airlines have established or resumed operations at the airport, including Air China, Cathay Pacific, China Eastern Airlines, China Southern Airlines, Delta Air Lines, JetBlue, Qatar Airways, Singapore Airlines, Turkish Airlines and WestJet. This is part of the airport's strategy to attract higher-spending business travellers (countering its dependence on European low-cost and charter markets), increasing year-round capacity utilisation by smoothing peaks and troughs in traffic. Gatwick's success in persuading these airlines to launch (or re-launch) routes to overseas destinations important for business and leisure travel was aided by a lack of comparable slots at Heathrow.
On 5 May 2020, Virgin Atlantic announced it would cease operations at Gatwick due to the COVID-19 pandemic. On 18 August 2020, Wizz Air announced a new hub at Gatwick Airport. Initially basing their A321 aircraft there along with additional commercial routes to Greece, Italy, Spain, and Malta operating from 22 October 2020, onwards.
In September 2021, the International Airlines Group announced that British Airways would terminate its short- and medium-haul base operations at Gatwick with immediate effect resulting in the cancellation of more than 30 routes. This came after labour negotiations regarding the handover of these operations, most of which were still suspended due to the COVID-19 pandemic, to a newly formed budget subsidiary failed. British Airways continues to serve two domestic destinations, Glasgow and Manchester alongside their long-haul network from Gatwick.
British Airways later resumed short-haul flights from Gatwick, as a new subsidiary that was initially operated by British Airways, but then under the trading name "BA EuroFlyer". The company expected this to happen by the autumn of 2022.
