A second-minute goal from Joe Dillon put Cavan on their way, though the hosts were rocked by a serious looking injury to defender Declan Brown.
Peter Reilly’s men took complete control after that. They led by 1-4 to 0-2 when Paul Graham laid on a second goal for his side, finished powerfully past men on the line by Enda Flanagan, making it 2-5 to 0-5 at the break. Cavan kept up the pressure after the restart and Graham’s goal finished the contest when he scored his side’s third goal.
Scorers for Derry: J Kearney 0-5 (3f), R Bell, A O’Neill (1f) 0-2 each, B Óg McGilligan, N McNicholl, E Bradley (1f) 0-1 each.
Scorers for Cavan: P Graham 1-3, J Dillon 1-1, M Argue 0-4, E Flanagan 1-0, C Brady, C Madden 0-1, K Boucher (1f) 0-1 each.
DERRY: S McNicholl; F Duffin, G McKinless, D Brown; C Carville, L McGoldrick, C McAtamney; B Óg McGilligan, N Rocks; J Kearney, C McFaul, E Duffy; T O’Brien, R Bell, A O’Neill.
Subs: A Hargan for Brown (7), N McNicholl for Rocks (30), E Bradley for Carville (40), R Moore for Duffy (56), P McGrogan for O’Neill (58)
CAVAN: J Farrelly; B Fortune, K Clarke, P Faulkner; G Smith, C Moynagh, D McVitty; B Seakey, M Argue; P Graham, J Dillon, C Brady; C Madden, K Boucher, E Flanagan.
Subs: N O’Donnell for Madden (49), A Watson for Fortune (51), C Byrne for Boucher (54), L Buchanan for Argue (57), E Hessin for O’Donnell (58), J McCabe for Smith (59)
Referee: M McNally (Monaghan).