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Calculating Maximum Duty Day

Date: April 19, 2022

Often a topic of confusion is determining our actual maximum duty day and the time at which the aircraft door must be closed to remain legal.

In order to answer these questions, let’s review the maximum duty time legalities found in our Contract - Section 6 - Minimum Pay and Credit, Hours of Service, and Contractual Legalities.

Domestic Maximum Duty Time

Duty Period Starting









High Value Trip**



The above duty time provisions are based on the Flight Attendant’s Home Domicile Time (HDT).

*Limited to no more than seven hours (7:00) flight time, unless the duty period contains a single segment, in which case the single segment may exceed seven (7:00) hours of flight time; ground time no greater than two hours and thirty minutes (2:30) and no more than one flight segment after a red-eye flight. A redeye flight is one with any portion scheduled to operate from 0200 to 0400, local time.

**A High Value Trip (HVT) shall be limited to a single duty period starting between 0500 and 1859, containing no more than three (3) flight segments with a total flight time of nine hours (9:00) or more.

International Maximum Duty Time

Flight Time including DH

Max Scheduled On Duty

Max Actual On Duty

Multi/Non-Stop up to 8:00



Multi/Non-Stop 8:01 to 12:00



Non-Stop 12:01 or over

Check in + Flight Time + Customs + Debrief

Check in + Flight Time + Customs + Debrief + 3:30

Under no circumstances shall a Flight Attendant be required to remain on duty, without her/his concurrence, in excess of the applicable maximum hours shown in the charts above, including deadheading.

Calculating the Time at Which Flight Attendants Will Go Illegal

Below is a simple formula that applies to all domestic duty times and all international duty times except the “Non-Stop 12:01 or over” category where the calculation is displayed in the chart above. 

Maximum Actual Duty Time                        __________________

Subtract Scheduled Duty Time          -        __________________

(This number represents how much time we have to play with before we go illegal)

Add Scheduled Departure Time         +        __________________

Equals Time You Go Illegal               =        __________________

It’s important to remember, depending on the circumstance, you may go illegal for a particular sequence based on maximum duty time, but you may be legal for a reassignment to another sequence that you are able to complete within the maximum duty time parameters.  Going illegal doesn’t always mean “going home.”

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