Use this calculator to find the minimum theoretical round trip latency between two cities or addresses. You can enter a specific address like: 1600 Pennsylvania Avenue NW, Washington, DC 20500 Or you can enter just a City like: San Diego, CA
You can also enter international addresses by entering the City and the Coutry, for example, Tokyo Japan.
Keep in mind this is the theoretical minimum latency. This assumes a straight line between two points with no equipment to add latency. Depending on the exact physical path the network connection takes, you might see 50% to 300% longer ping times.
