3 lighted craft passed slowly off the left wing of our plane over central Nevadaapprox 8:30pm on flight Jet Blue 647 from NY to SFO over central Nevada on a clear night, half moon with a lower cloud deck. I was looking out the window and saw what appeared to be a craft with two very bright white lights (top & bottom) with a red strobe in the middle blinking about 4 times faster that the red light on the wing of our plane. It passed very slowly off the left side of the plane (approx 10 seconds from as far right as I could see to as far left). Then two more side by side (or could have been one above the other as perspective is difficult, passed below the wing. They seemed to be moving at the same speed and had same light configurations as the first. We were flying level at the time so i guess the first one would have been at about a 90• angle and the second two at about 65*. This too lasted about 10 seconds. I was trying to gauge the size of the lights as they did appear to be quite large. the white lights I gauged to be slightly less than a quarter of the moon that nigh and the red strobes were a bit smaller.Our altitude at the time was approx 37,400 feet and air speed was approx 550 mph