Times
Keep dates and times clear and consistent to avoid confusion—especially in an airline setting where timing is everything. This clarity helps travelers plan better, reduces mistakes, and ensures smooth coordination across global operations.
Overview
Use a.m. and p.m. (include periods) to designate day or night.
Do
- 8:00 a.m.
- 08:00 a.m.
Don't
- 8:00 am
- 8 a.m.
When space permits, include the time zone.
- 8:00 a.m. to 4:00 p.m. MT
Time range
When expressing a time range, be consistent. If both the start time and end time conclude in the a.m. or p.m., only one identifier is required on the second time. Express a range with either ‘–’ or ‘to’.
Do
- 4:30 to 9:00 p.m.
- 4:30 – 9:00 p.m.
- 4:00 a.m. to 9:00 p.m.
Don't
- 4:30 to 9 p.m.
- 4:30 and 9:00 p.m.
- 4:00 p.m. to 9:00 p.m.
- Do not use noon, midnight or midnite.
24-hour clock
Format: 24:00. Always include hr. or hrs.
- 01:23 hr.
- 23:00 – 23:55 hrs.
Specific to flight arrivals and departures; itinerary specific times. Reference the guidelines on this page for how to write date and time for flights and trips.
Length of time
When expressing a length of time, use the full word (hours or minutes) when space permits. If space is limited, you can use the abbreviation.
- Hours
- Minutes
- hrs.
- min.
