Two round white objects over Williamsport, PAI observed two objects travelling west to east. Both had an apparent size about equal to an airliner at 30,000 feet, but wings were not visible, and the apparent speed was roughly 10x faster than a typical airliner. No vapor trails whatsoever. Both objects were travelling in the same direction, but along slightly separate parallel alignments. One led the other by about 5 seconds. Both objects were observed nearly directly overhead, slightly to the north of my location. With the sun low in the southeast, it seemed unlikely that I was seeing a reflection of sunlight off the objects. Both objects were bright white against a slightly hazy blue sky. One object appeared round, and the other object appeared slightly oval shape and was rotating at about 2 revolutions per second. Weather conditions: clear with calm winds, about 45 F.