last sep 98 I "confronted" my UA people in Zurich with a lower LH-fares (eco). UA matched that fare then by giving me a ticket with a higher fare printed on, but asking/charging only the LH-tarif, which was about 150SFr lower (reason: in Switzerland airlines have to let their fares still being "accepted" by the swiss authorities - it seems UA didn't for that discount tarif).