What are the definitions of stages and sequences when describing a flight, and how do they compare against leg/portion/sector/segment?
I read:
- Question: In what case doesn't a coupon correspond to a segment?
- Comment: This is getting into the weeds of terminology that most travelers don't need to deal with; there are also sectors and legs and portions and stages and sequences and more, just different ways of dividing up the trip and dividing up the money. – choster Jun 9 at 2:41 (mirror)
I couldn't find the definitions of stages and sequences. What are the definitions of stages and sequences and how do they compare against leg/portion/sector/segment?
Here are the IATA definitions I could find on dividing up the trip and dividing up the money:
| Term Name | Description | Source of Description |
|---|---|---|
| Coupon | The portion of the Passenger Ticket and Baggage Check or Excess Baggage Ticket that indicates particular places between which the coupon is good for carriage. | |
| Leg | The space between two consecutive scheduled stops on any given flight. | IATA,PSCRMe34,CHPT 1,RESO 766 |
| Leg | The operation between a departure station and the next arrival station. | IATA,SSIMe38 (2011),CHPT 1.1,RP 1761b |
| Portion | One segment or consecutive segments (even though gap intervenes) via any one Member. | IATA,Reso766 |
| Sector | (see "Leg") | IATA,SSIM,RP1761b |
| Segment | A leg or a group of legs from boarding point of a passenger to a deplaning point on a given flight. | IATA,PSCRMe34,CHPT 1,RESO 766 |
| Segment | (Sometimes referred to as City Pair) The operation between board point and any subsequent off point within the same flight. | IATA,SSIMe38 (2011),CHPT 1.1,RP 1761b |
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