Originally Posted by
mastoidbone
I am 1P in United, but am flying LH metal soon, under reservation there is option to add 2nd or 3rd FF number----is there any purpose or benefit to me in entering my LH FF number as secondary FF to the confirmation???
One can be for perks, the other can be for mileage accrual.
I took an intra-European flight on LH last year that wouldn't have gotten MP miles, but would get LH miles. So I accrued on LH and used my UA number for 1K/*G perks.