Originally Posted by UA Insider

Hi demkr, yes, any reservations that include your Mileage Plus number will automatically be credited to your permanent account number once we’re operating on a single platform.

Hi bmvaughn, until our systems are integrated, everything will continue to work as is does today. After that, we'll handle the mapping of account numbers for quite some time. For example, if a car company sends us your Mileage Plus number for a rental you’ve made, we’ll have this mapped to your new number for earning purposes. That said, you’ll be safe to change your number with any partners as well (but, only after our transition to a single system takes place).

Appreciate you sharing this GoAmtrak,. Since we’re not yet on a single system, between now and late first quarter of next year you can continue to use your Mileage Plus account number in cases like this. We’re diligently working with all of our partners to ensure any required changes are made to their systems as well. We’ll make sure this one is on our radar.

Shannon