Where is generally the best place to exchange currency for a trip? [closed]

Question

In general, where is the best place to exchange currency when going for a trip? Some options include:

• a bank before you leave
• some exchange service before you leave
• at the airport before you leave (doubt it)
• at the airport when you arrive (doubt it)
• at some place at your destination (sounds risky)
• using some online service (?)
• something I didn't think of?

Please also consider in your answer that I would want to exchange back any leftover currency at the end of my trip. If it matters I live in the US.

Answer 1

Mom-and-Pop money changers near a business district (compromise between security and better rates). Being in a (central) business district and an airport, AFAIK gives you the worst rates.

Banks maybe, if you are a long-time client and hold significant worth of accounts with them.