https://www.cnn.com/travel/article/airb ... index.html
From early November:
"If you have plans to fly from New York to Dallas-Ft. Worth or to Houston, Delta is hoping you'll take notice. Those are two of the first routes the airline plans for these new jets beginning in January and April, respectively.
By the way, it's no coincidence that those two cities are dominated by Delta's competitors, United Airlines and American Airlines. Will the A220 allow Delta to give United and American a run for their money in these markets?
"Pretty good chance of it," says Richard Aboulafia, aviation industry analyst at Teal Group.
The A220 also helps increase profits by saving fuel. Airbus says it's 20% more fuel efficient than similar sized jets."