We’re always glad to hear from MileagePlus® members like you. Thanks for writing. We are unable to add the requested flight(s) to your MileagePlus account. Partner flights (other than Copa) taken prior to enrollment in the MileagePlus program are not eligible for mileage accrual due to contractual agreements with our partners. You may also visit www.mileageplus.com for complete details regarding retro credit policy on United and our airline partners.
We appreciate you taking the time to contact us. Regards, Ervin Estrella MileagePlus