On Thursday, the Airbus A220 jetliner official entered commercial service in North America with Delta Air Lines, with flights from New York to Boston and Dallas.

The A220 began life as the Bombardier C Series but was rebranded after Airbus took over the program.

The state-of-the-art Canadian jetliner was also the subject of a trade dispute launched by Boeing in 2017.

On Thursday, the Airbus A220 jetliner official entered commercial service in North America with Delta Air Lines.

Delta's relationship with the A220, formerly known as the Bombardier C Series, started in 2016 when the carrier announced an order for 75 of the jetliners in a deal worth as much as $5.6 billion. The order made Delta the plane's North American launch customer.

In April 2017, Boeing filed a complaint with US Commerce Department and the US International Trade Commission alleging that the Delta C Series order was made possible only by abnormally low prices supported by Canadian government subsidies.

The US International Trade Commission agreed and in September of that year recommended a 219.63% tariff. A week later, the Commerce Department added a 79.82% tariff.

Bombardier and Delta both argued that Boeing's business couldn't have been hurt by the deal because Boeing didn't have a product in its lineup similar in capacity to the C Series.

In total, Bombardier and Delta faced a 299.45% tariff on any Canadian-built C Series plane exported to the US.

Facing the possibility of losing the most important order in the C Series program's history, Bombardier turned to Boeing's greatest foe, Airbus.

Read more: Boeing started a trade dispute with Canada, but Airbus and Alabama ended up being the winners

Less than a month after the tariff was announced, Bombardier handed 50.01% of its prized airliner program to Airbus with zero up-front cash investment coming from the European aviation giant.

In the summer of 2018, the Bombardier C Series was officially rebranded as the Airbus A220.

So what's all the fuss about?

The A220 is a state-of-the-art single-aisle airliner. The Canadian-built jet is a clean-sheet design that incorporates the latest in commercial aviation technology, like a carbon-composite fuselage and fuel-sipping Pratt & Whitney geared turbofan engines.

The plane, which entered service with Swiss in 2016, has earned praise from its operators for its exceptional fuel efficiency.

The A220 lives in the 100-to-150-seat airliner market, a segment that Airbus and Boeing had effectively abandoned for a decade.

So nearly three years, a trade dispute, and a name change later, the jet is finally ready to fly with Delta Air Lines.

Here's a closer look at the inaugural flight of Delta's Airbus A220.