Four white/silver saucer shaped objects

I thought it was a shooting star. Closer they came I could distinguish four individual saucer shaped objects flying directly overhead. They made no sound. I observed them approximately 15-20 seconds. Three were in a cluster, with the other close by. Faster than a plane. Very clear night. I could see them moving individually. No lights were turned on. I live close to an airport. Never seen anything like this, except other UFO sightings on tv. I called the airport this morning and they were closed the night of the sighting.