A220-100 yes with the reduced "paper" MTOM of 58 tons. Could even work with the 63 tons manufacturer limit but it will corner you.
Today advertised at up to 63 tons but you cannot cram so many passengers load and fuel in for shorter flights (2 hours). So that's not an issue.
A220-300 useful at MTOM FL 370 - 390 @ some 64 tons.
you can nearly always reach 380 at MTOM with both 100 and 300 but the 300 is struggling a bit. (just about 1'000 ft/min)
Initial cruise level at MTOM (useful level) is 370 - 380 even 390 if conditions are smooth.
Last edited by error_401; 12th Sep 2020 at 09:09.