- "What were you thinking? You exposed yourself. To the world. You're out there now, Kara. Everyone will know about you and you can't take that back."
- "I don't want to."
- —Alex and Kara on the aftermath of Flight 237[src]
The Sabotage of Flight 237 is the attempted murder of several Department of Extra-Normal Operations agents by the Fort Rozz escapee Vartox, under orders of Astra. The plane's crashing was prevented by Kara Danvers in her first heroic act.
- "When I looked into your eyes that night on the plane, you were clear and free."
- —Thomas Coville to Supergirl[src]
Following orders given to him by General Astra, Vartox planted a bomb on Flight 237, intending to kill several of the D.E.O. agents on board. After a failed date, Kara Danvers saw news of the flight having engine failure and, due to her adoptive sister Alex Danvers being on board, prevented the plane from crashing, using her abilities for the first time in years.