We're starting to see what Delta has in store for Boston once they take full control of A
Washington Reagan starts September 8 at 6 daily
Newark starts September 8 at 4 daily
Chicago O'Hare starts September 8 at 5 daily
Air Canada is trimming its Vancouver to Boston seasonal service. The flights will not operate in May this year and they've cut frequency in September.
United is dropping Cleveland service from Boston. Last flights at March 7, 2019.
UPDATE
Official Delta press release
https://news.delta.com/delta-adds-m...rs-chicago-cleveland-newark-and-washington-dc
They're also adding Cleveland.
Cleveland beings April 1, 2019 - 3 x daily
Chicago O'Hare begins September 9, 2019 - 5 x daily
Newark begins September 9, 2019 - 4 x daily
Washington Reagan begins September 9, 2019 - 6 x daily
Pittsburgh, Indianapolis, Nashville, Jacksonville and Philadelphia will also see frequency additions.
Delta will also be upgrading one of its two SkyClubs in 2020.