The Airbus A220 has been the most underestimated commercial airliner of the past decade — a Canadian-designed jet (originally the Bombardier C Series) that quietly piled up loyal customers and stellar dispatch reliability while the headlines went to bigger aircraft. This week, the A220 got its single biggest order ever, from an operator very few people expected.

AirAsia, the Malaysian low-cost carrier best known for its A320neo fleet, signed a firm order for 150 A220-300s. The deal — the largest single firm order in A220 history — will be built almost entirely at the Mirabel plant in Quebec, where Airbus took over the C Series programme from Bombardier in 2018.

Why the A220, and Why AirAsia?

AirAsia has spent its first quarter-century as a textbook A320 operator. The A220 is a smaller aircraft — 160 seats in AirAsia’s configuration versus the A320neo's 180-186 — which usually argues against fitting it into a low-cost long-thin model. But Southeast Asia has hundreds of secondary routes that cannot fill an A320 reliably. The A220 lets AirAsia open those city pairs at lower frequency, with lower fuel burn per seat, and with the same operational economics that have made the A220 a favourite of full-service carriers like Delta and Air France.

The economics are the story. The A220-300 has been cited as the lowest cost-per-seat-mile aircraft in the under-150-seat category, and its Pratt & Whitney GTF engines deliver fuel economy that rivals or beats the A320neo.

A Boost for Quebec

The order is also a major industrial event for Canada. Mirabel's A220 line — once almost cancelled when Bombardier collapsed under the programme's development costs — is now booked solid for years. Quebec premier Christine Fréchette has publicly framed the order as vindication of provincial industrial policy, and the federal government is expected to fold it into its rolling tally of post-tariff aerospace investment.

A Quiet Threat to Boeing

Every A220 sold is, by definition, an aircraft Boeing didn't sell. The 737 MAX 7 — the smallest 737 variant — has struggled to attract orders and remains uncertified after years of delay. A 150-aircraft A220 order written by a customer with no historical Airbus loyalty in that size class is a quiet message to Boeing that the missing piece in the 737 family is hurting.

AirAsia is buying Canadian. And Toulouse and Mirabel are both very, very happy.

Sources: CBC News, Airbus press release, Reuters.