Originally Posted by arindamiitk

Some data points from my recent transfers:

[Expected timeframe]
United Airlines (UA) Initiated: Tuesday 16 Oct 2018 Received: Thursday 18 Oct 2018
United Airlines (UA) Initiated: Monday 22 Oct 2018 Received: Wednesday 24 Oct 2018

[Unexpected timeframe]
United Airlines (UA) Initiated: Wednesday 24 Oct 2018 Received: Friday 16 Nov 2018

The first 2 transfers (for 60K each) went through as expected based on other DPs - took 2 days and showed up in United account activity backdated to date of initiated transfer from Marriott. The 3rd transfer (for 60K) did not show up in 2 days. I reached out to Marriott and they said that the transfer had been sent from Marriott's end and I should contact United. Upon contacting United, they said that it can take up to 15 business days. The transferred miles had still not shown up after the 15 business days. I contacted United via their website form with screenshots of the transfer and the miles showed up in my United account the next day (backdated to 10/24)!

Also initiated a transfer to Alaska yesterday - will update DP once the transfer completes.