New Delhi : Asia Pacific airlines have a collective 4,430 commercial aircraft on order, accounting for almost 40 per cent of identified outstanding orders globally. Of this figure, nearly 2500 aircraft orders are concentrated with 10 airlines.

Almost 95 per cent of the unfilled orders with these 10 airlines are for narrowbodies.

The Indian LCC IndiGo tops the list of airlines by fleet orders, with just under 500 aircraft due to be delivered to it within the next eight years, and the orders are primarily for A320 family aircraft.

SpiceJet has 155 aircraft on order, all of them for Boeing 737 MAX variants. This includes 102 737 MAX 8s and 40 737 MAX 10s.

Jet Airways has 135 aircraft on order - 125 737 MAXs and 10 787-9s - although the fate of these orders is not fully clear, because the airline has been inactive since bankruptcy in 2019.

Indonesia's Lion Air has a total of 425 aircraft on order, including 406 narrowbodies and 19 turboprops. The narrowbody orders are split between the Boeing (228 737 MAX) and Airbus (178 A320/A321neo) types.

Lion Air's narrowbody orders are also split between all-economy and dual-class configurations. There are 99 dual-class A320neos and another 64 aircraft are dual-class A321neos on order. The remaining 244 narrowbody orders are for high-density configurations, including 50 of the 737 MAX 10, with 230 seats.

AirAsia Group has 362 orders for delivery out to 2035, all of them for high-density 232 seat A321neo aircraft. The group has migrated some earlier commitments for A320neo aircraft to the larger A321neo, on the basis of the A321's advantages in capacity and unit costs.

The Hanoi-based LCC VietJet Air has 314 narrowbodies on order, with 114 from Airbus and another 200 from Boeing (all 737 MAXs). Deliveries of Boeing aircraft are due to start in 2024, including high-density 737 MAX 10s and 737 MAX 8-200s.

China Southern Airlines has 192 aircraft on order (although five of these are with local OEM COMAC and are yet to be formally confirmed). The airline's backlog is made up of a wide mix of widebodies, narrowbodies and regional jets from different OEMs: 101 aircraft from Airbus, 68 from Boeing and 24 from domestic OEM COMAC.

China Eastern Airlines has 185 aircraft on order (135 from Airbus and 50 from Boeing).

Air China (in ninth place, with a backlog of 122 aircraft) has a broad mix of types from different OEMs on order, although orders are concentrated on Western narrowbodies.

Also in China, the recently rebranded Sunan Ruili Airlines has 100 Boeing aircraft on order, taking up last place in the top 10 ranking.