The current processing time for Form I-129F (“Petition for Alien Fiancé”) is 8-10 months, plus 4-6 weeks to receive an interview notice.
Factors That Can Affect Your Timeline
Some countries have longer processes that can be brought on by the local embassy workload, conflicts in the area, or other unexpected delays.
Requests for Evidence (RFE)
The most common delays are brought on by RFEs. The vast majority of these can be avoided if your petition is assembled professionally.
In the past, influxes of USCIS workload have affected overall timelines. This could be brought on by changes in immigration processes or policies.
Quality of Your Petition
Petitions that are easy to move through and approve tend to get approved faster.
Natural Disasters, War, Terrorism
Events such as these are out of your control and can cause unexpected delays.