nonscheduled
Without fixed times
Nonscheduled describes something not operating on a fixed schedule or timetable.
A nonscheduled airline or nonscheduled flight operates on demand rather than at regular, predetermined times—charter services rather than commercial routes.
The term appears in regulatory and industry contexts: nonscheduled air carriers, nonscheduled maintenance.
Without advance preparation
- unplannedNot arranged beforehand
- spur-of-the-momentDone without advance planning
- last-minuteJust before deadline
- unexpectedNot anticipated beforehand
unannounced · snap · offhand · casual · informal · unrehearsed · unscripted · freeform
Able to be changed
- open-endedLacking fixed boundaries
- fluidSubstance that flows
- adaptableAble to adjust readily
- accommodatingWilling to help others
discretionary · elective · optional · tentative · floating · movable · reschedulable · postponable
Founding organizational document
- ad-hocFor a specific purpose
- intermittentOccurring at irregular intervals
- occasionalHappening at intervals
- sporadicOccurring irregularly, infrequently
infrequent · on-call · non-routine · nonstandard · variable · episodic · supplemental · unregulated
Causing difficulty or bother
- untimelyOccurring too soon
- inopportuneOccurring at unsuitable time
- ill-timedOccurring at wrong moment
- unwelcomeNot wanted here
problematic · unforeseen · unanticipated · emergency · urgent · downtime · delay · interruption
impromptu
Without advance preparation
- unplannedNot arranged beforehand
- spur-of-the-momentDone without advance planning
- last-minuteJust before deadline
unexpected · unannounced · snap · offhand · casual · informal · unrehearsed · unscripted · freeform · impulsive
adjustable
Able to be changed
- open-endedLacking fixed boundaries
- fluidSubstance that flows
- adaptableAble to adjust readily
accommodating · discretionary · elective · optional · tentative · floating · movable · reschedulable · postponable · deferrable
charter
Founding organizational document
- ad-hocFor a specific purpose
- intermittentOccurring at irregular intervals
- occasionalHappening at intervals
sporadic · infrequent · on-call · non-routine · nonstandard · variable · episodic · supplemental · unregulated · unlicensed
inconvenient
Causing difficulty or bother
- untimelyOccurring too soon
- inopportuneOccurring at unsuitable time
- ill-timedOccurring at wrong moment
unwelcome · problematic · unforeseen · unanticipated · emergency · urgent · downtime · delay · interruption · cancellation
nonscheduledscheduled
Arranged for specific time
regular · routine · timetabled · planned · prearranged
schedule, scheduled, schedules, reschedule, scheduling, unscheduled, rescheduled, rescheduling, scheduler