Good Day: I purchased on the United web site this morning ( 9/6/2011) a two legs ticket for a total cost of $350.40 Shortly thereafter it came to my attention that the exact same itinerary flown on United Airlines was sold on Orbitz for $331.40. A very small difference of $19.00 I tried on the phone to have United Airlines match the fare but to no avail because the Orbitz fare was ticketed under US AIR even though both flights were the very same United flights. Continental like US AIR was also cheaper. How can United justify having a higher fare on its web site , flying its own equipment versus both Continental and US AIR via a third party web site? It does not look like the United Low Fare Garantee on United.com would apply and to make matters more interesting I was told that although I am 1K/Million Miler I would not qualify to be put on the UDU list. Am I missing something here?