Originally Posted by
mahasamatman
No.
United does not agree with you. Copied from United website (the last line below):
More information on Complimentary Premier Upgrades
Complimentary Premier Upgrade availability:
- ✓ Available to All Premiers
- ✓ Available to Companions traveling on the same reservation as the Premier
- ✖ Unavailable to Basic economy fares
If you’ve booked a full-fare Economy ticket in these fare classes, you may be eligible for an upgrade as soon as your flight is ticketed: