My record is 6+ months last year. Thermal labels don't hold up well to weathering and offgassing plastic contents. Good on my local postal service for making out the address anyway and getting it to me.
I had the opposite experience last year - a book shipped from Dallas to Australia through Los Angeles and Austria (19 November to 25 February). Maybe I could have specified my address as "Australia, Southern Hemisphere".
Weirdly enough the longest shipping times I have in central Europe are everything related to the US. We ship everywhere basically within at max 2 weeks. Canada, Singapore, New Zealand, South Africa, no problem. We receive cheaply shipped packages from China, India or Singapore within on average 3 weeks.
But we had letter sized priority shipments to the US that took 3 months, on average about 3-5 weeks at times!! Shipments from the US that took about as long too.
No idea what happened in the beginning with Corona. But from my POV it seems the postal system is broken over there.
I understand that. However everywhere else it took maybe a week more and only for the first few months.
Does that really explain why the US is still having these problems? My guess is that the system is overwhelmed either way. Flights from and to China also were massively less, yet the worst delay we had with china was like 1 week. And today it is on average a week less than before Corona, because most postal systems were actually able to grow and better themselfs in that time.
It took me 18 months to receive a camera for an embedded device I'm building. I had ordered multiple last January and just wrote off one that never arrived. That one finally arrived about a week ago - I was shocked and delighted.
Which is one of the MANY reasons I mostly use "Austria, Europe" in conversations nowadays.