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Thread: 1K/1P/2P traveling on CO - Upgrades? [Merged]
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Old May 14, 2011 | 1:16 am
  #22  
sfvoyage
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Originally Posted by halls120
How do you switch from a UA MP# to a CO OP#, and once I do that to improve my upgrade chances on the CO flight, won't that hurt my upgrade chances on the return?
You should be able to switch between your UA & CO #'s online on your booking profile. If not, you can always call the airlines.

After your outbound flight, you can switch back to your UA #.
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