I see 432 questions tagged [tag:short-connections]. This made me wonder: which airport has the longest connection time?

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Notes:

- Longest connection time [=](https://travel.stackexchange.com/a/86253/1810) time it takes for a passenger to go from one flight to their connecting flight.
- I am interested in 
   1) airside-only transits
   2) transits requiring to go through customs/immigrations
   3) transits requiring to pick up one's checked luggage. 
  
   I understand this means that the question may therefore have 3 correct answers. It's that's too broad, I can post 3 questions.
- Assume the passenger is healthy (i.e., can walk fast with their carry-on bag) and has a French or US passport.
- I understand that the connection time partly depends on the arrival and departure terminals. I'm interested in the worst case scenario, since I am looking for an upper bound. 
- Assume that the planes are on time.
- Assume that the arrival and departure planes are at same airport.

Motivation: getting upper bounds, i.e. if the answer is e.g. that the longest connection time for airside-only transits is 60 minutes, then I won't have to worry when I have airside-only transits scheduled for 60 minutes or more, regardless of the airport. For example, this [question](https://travel.stackexchange.com/q/186265/1810) asked if 2 hours was enough for an airside-only transit, and the OP wouldn't have had to worry about it if they knew that the longest connection time for airside-only transits is 60 minutes (+ knew that airside-only transits are possible at that airport).