Question : Is there another way to get to London City Airport (LCY) besides Manchester Boston Regional Airport (MHT)?
Answer : Departing from Manchester Boston Regional Airport is not the only way to get to London City Airport. Try looking for flights from Logan International Airport (BOS) as well. Over the upcoming two months, flights from BOS to LCY are being booked 24% cheaper than flights from MHT to LCY. Being only 44 miles away, it's easily accessible for most.
Question : How long do most people visit London?
Answer : Of course you're not most people, but if you were, you'd stay roughly seven days.