Wiktionary
n. (context travel aviation English) a fare construction where the destination is not the same as the origin point for the return, or where the origin differs from the return destination.
Usage examples of "open jaw".
Its open jaw flattened both of them, but snapped shut only as the animal reared yet again.
The black, bristling-furred body that launched itself through the gap lunged at Gordon's exposed face and sank its teeth deep into the open jaw, knocking him backwards, rolling with him onto the startled boys trapped inside their sleeping-bags.
Laeral closed her open jaw and returned the gesture with a curtsy.
It was all there in the video file, the spine arched backward in death, the odd shreds of flesh or clothing that had escaped complete annihilation, the feeling of terrible screams echoing from the charred, open jaw.
He had a long tube-like face with a long rounded open jaw and a long depressed nose.