Originally Posted by
christep
Your recollection is off. I many times used open-dated paper ticket coupons with city codes in conjunction with a valid reservation from an airport corresponding to those codes. LON-NYC-SFO (which, if I remember correctly, used to allow SJC and OAK as well) would be valid on many different airport routes and there was no problem flying into, say, EWR, and out of LGA.
Thanks. Interesting that eticket coupons (VCRs) still use city codes. I suppose it's because etickets are mostly constructed automatically from itineraries, and itineraries require an airport code.