Originally Posted by
1kBill
I thought UA changed to the complimentary upgrade method when CO management took over and implemented their model.
Prior to UDU, UA used e500s
UDU was announced in Oct 2009, a year before the merger was announced --
United's Unlimited Domestic Upgrades Program (Data through March 18, 2010) [Merged]
One can debated if UDU was implied in anticpation of the merger but the first merger candidate in 2010 was US, CO came later.
Originally Posted by
MSPeconomist
Some carriers (DL for example) still give space available free upgrades on particularly short international routes without genuine international business class service or amenities. ....
As does UA (CPU) but it pretty clear the OP was asking about GPU routes, TPAC/TATL. ...