Two glowing orange lights moved rapidly across the sky keeping a constant distance between them and then climbed rapidly out of sight

Standing in my backyard my wife Andi witnessed two orange lights coming out of the southeast sky moving northwest. They appeared to fly like an airplane but did not have the usual lights we see on the many aircraft in the area. ( We live near the airport). We also heard no sound and the lights seemed to following one another at a constant set distance. The light was very much orange in color and flickered like fire. It wasn't the bright white light of a commercial airliner and there were no other colors or anything flashing. Just constant orange light. We could not see any shape or vehicle, just light without sound. They moved across the sky much like two airplanes would until one began climbing quickly followed soon after by the other. In a matter of seconds they were out of sight.