Originally Posted by KQ321

The KVS FAQ gives examples of routing rules that only contain airport codes (eg: NYC-CHI/DFW-SFO/LAX-HNL). However, when checking routing rules for fares I am interested in, they often seem to have airline code(s) in between each airport code. Eg:I assume that this means that travel between that city-pair must be on (one of) the indicated carrier(s). However, is this referring to marketing carrier, or operating carrier? (For example, say there is an AF-coded flight from PAR to XXX, operated by a different carrier - would this routing rule allow it to be used, or would the operating carrier's code have to be explicitly listed in the routing rules for that to be possible?)