You mean all of your ships move at the same moment? No.

If that's not what you meant, it depends on what you're doing. If you're just moving them to certain locations, you can set rally points. If you have a group of them close to each other going to basically the same area, hold down CTRL and drag a box over them and that'll give them all the same command at the same time. Or fleet them together and disband the fleet when they get where they're supposed to be.