I was waiting for a bus near the airport today when I saw an aircraft type that I’ve never seen before. It was of a configuration similar to a Dash 8 - high wing monoplane, T-tail and twin engines - except that instead of two turbo-prop engines it had two turbo-jets or turbo-fans. I think it may have even been slightly smaller than a Dash 8 but that’s a bit of a guess.
The Dornier is much closer in size to the Dash 8, so that is more likely to be what you saw. Also, assuming you are in the USA, Dorniers are operational in the US while I don’t think the Antonov is.
Trudeau airport in Montreal. It was almost directly overhead (maybe 5 or 10 degrees off, max) and its underside was grey/silver and I think that its fuselage was white. I tried to find it on flight-tracker but no joy.
I managed to get a photo of it on the tarmac a couple of days ago. I just Googled its tail number (I wasn’t sure that I would get anything) and lo and behold, here it is:
From here Fairchild Dornier 328JET - Wikipedia we see the project was not a commercial success. I’ve seen one on maybe half a dozen occasions in the last 20 years.