The following is a copy of my post on the General Travel Board that is more appropriate to NW:
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This is starting to get like the Staples coupons.
While searching for a fare for EWR-SLC Nov 11/12, I input the following Codes:
None = $334
PE 122 $280(Shirley's)
PE 207 $318
Next, EWR-ATL same dates
None = $187
PE 100 =$187 (Shirley's)
PE 207 =$178
Does anyone have a list of all current, active Reference Codes?