S
| S | Rate class code indicating that a surcharged class rate has been applied as used in the rate class box of the AWB |
| SAL | Surface mail |
| SCR | Specific Commodity Rate |
| SDR | Special Drawing Rights |
| SHL | ave human life |
| SITA | Société Internationale de Télécommunications Aéronautiques |
| SLI | Shipper's Letter of Instruction |
| SOC | Shipper's Own Container |
| SPF | Laboratory animals |
| SUR | Surface transportation |
| SWP | Sporting weapons |
