Large Transport; Low Wing; 2 Turbojet Eng
Flight Crew Last 90 Days 140; Flight Crew Type 6000
Situational Awareness
Deviation / Discrepancy - Procedural FAR; Deviation / Discrepancy - Procedural Published Material / Policy
General None Reported / Taken
Environment - Non Weather Related; Human Factors
We diverted into TWF after going missed approach due to low ceilings. We landed uneventfully and departed after 90 minutes in TWF. Takeoff was uneventful from our perspective.  Upon arrival; a Nonrev Pilot in the back told us he didn't see any runway lighting on departure from TWF. The Tower was closed in TWF at the time; making it an uncontrolled airport with Pilot controlled lighting. The Captain and I both recall seeing runway lighting when we took the runway; however; the Pilot in back said he was approached by two Customers claiming they didn't see runway lights.The departure; flight; and arrival from TWF were uneventful. I do not remember activating the lights by clicking the MIC in TWF prior to departure. However; I specifically remember seeing side lights; runway remaining lights; and runway end lights. Weather; uncontrolled airport; unfamiliar offline airport; and long duty day were all contributing factors. I felt we did not rush; and we thoroughly reviewed procedures for the divert. A good discussion with all involved provided learning lessons in the event something like this occurs in the future.
[Report narrative contained no additional information.]
An air carrier crew diverted to TWF from a missed approach. After takeoff from TWF and upon landing; a non-revenue pilot notified the crew they departed with the runway lights off; also observed by passengers.