Shortly before coming to Singapore, I quickly realized that I am only a few pounds shy of my highest weight, and therefore would not have an easy trip. The last time I weighed this much was in 2011 when I travelled to Thailand. I barely fit in the airplane seat, could hardly stand the excessive walking, all resulting in excessive sweating [especially compared to my teammates], and chaffing in unexpected areas. That trip was wonderful and painful at the same time.
After that initial trip to Thailand, I lost 45 pounds and travelled two more times to Thailand and once to Israel. Walking around and sitting on the place were much more tolerable during those trips.
I left for Singapore on 27 November (day after Thanksgiving). The flight was mildly uncomfortable, especially when I had to get in and out of my seat. I'm way too large for the seats, especially when trying to get in and out.
The first full day of our trip (Sunday), we spent walking around and sightseeing. We walked all around, but due to the heat and our jet lag, we settled on a taxi to return to the hotel. The next three days were mostly meetings with some evening walking and sweating.
I hope the above diary like entry helps you, as I know it will continue to help me in my future.