Jetliners crisscross the upper-tropospheric sky often here in “Flyover Country”, hence the nickname (or epithet, depending). As such, in the right conditions of humidity and wind up there, we often witness contrails. What we do not see commonly are their shadows, so plainly cast on clouds below them, as in this slightly lower-level (but still high aloft!) thin cirrus deck. A faint 22-degree halo also can be seen around the sun, in the upper-right quadrant of this photo.
Norman OK (8 Jan 19) Looking SE
35.2196, -97.3957