Two objects, matching speed and E direction, white ovals.

Saw a single object moving at what seemed normal high elevation plane speed, but it had no normal plane sound, contrail, and seemed lower than normal planes. After about a minute, another one appeared flying closer than I've ever seen a plane fly to another plane. It didn't come up to it, rather it just seemed to materialize right next to it. The new one matched speed exactly, both going Easterly direction. They appeared white and oval, but they were far off so cannot confirm their shape. They did match though. It was a bright sunny day.