2 answers
Kim’s Answer
"toughest" goes in cycles. Whenever there is bad weather, weird things start to happen. We had 22 flights diverted from DFW to SAT one night. Ops has to find room to park them all! This gets even crazier during special events, like Final Four, when lots of private jets are coming in.
In colder cities, they have to contend with ice and snow. It's a lot of work to keep an airport operational. Or, there are problems when pilots misjudge a turn and get stuck in the mud. Or, an aircraft's landing gear collapses on the runway, putting the runway out of service. I would say all of this is more likely to happen in the fall/winter.
As far as things in the terminal are concerned, holidays and summer are more hectic, because the people travelling are less likely to be regular travelers, so they get more stressed out.
Good question!
Raad’s Answer
1. Holidays & summer vacations: This period can really be hectic due to the uncertainty ( unregular travellers ) where it will reverse on a huge work volume coming in a sudden.
2. Global crisis/ pandemics: well, covid 19 is the biggest example of this category. This period was hard due to economic part, fluctuated forcastes & the new normal that airlines operations had to deal with !.