uboat.net

1942
U-597, U-216, U-599, U-611,

1943
U-225, U-623, U-524, U-635, U-632, U-189, U-332,
U-109, U-456, U-258, U-304, U-200, U-628, U-535, U-951,
U-232, U-514, U-506, U-558 +, U-598, U-404 +, U-706 +, U-84,
U-468, U-604 +, U-341, U-389, U-419, U-643, U-470, U-844,
U-964, U-540, U-274 +, U-848 +, U-966 +, U-508, U-280, U-849,
U-391,

1944
U-271, U-177, U-990, U-292, U-629, U-373, U-441,
U-821 +, U-971 +, U-317, U-988 +, U-478 +, U-319, U-347, U-471 +,
U-608 +, U-618 +, U-867, U-863, U-1060 +,

1945
U-681, U-1106, U-326, U-1017, U-534, U-579, U-1008,
U-3523,

72 U-boats lost to Liberator aircraft. + means that the Liberator shared the credit for the sinking.

There is always a very slight chance we might have missed one or two boats in this lookup. If you suspect so please let us know.