Bologna can be frozen for up to two months in a freezer that maintains a constant temperature of 0 degrees Fahrenheit. After two months, the quality starts to diminish. Bologna in unopened vacuum packaging can be frozen in the original packaging.
Reseal an opened package of bologna and wrap it tightly with plastic wrap before freezing. Fresh-sliced bologna from a deli should be transferred to an airtight freezer bag or other freezer-safe container beforehand. Use a freezer label and permanent marker to mark the expiration date on the package. Thaw frozen bologna in the refrigerator for 12 to 24 hours before use.