Last night on continental.com, the roundtrip fare for PVD-SJC was $211. When I called Onepass Elite to book tickets they insisted the lowest fare was $231. I hung up to call back less than a minute later and the price had increased to $251. I hung up again and called back and the price again changed to $231. Ticked off at Continental, I searched nwa.com and their lowest fare was ONLY $162 for the exact flight (on Continental Airline) on the same date that Onepass had quoted me $251 only a minute earlier. How is it possible that Northwest Airlines can sell seats on Continental Airlines for so much cheaper than Continental can sell for their own planes? I know Northwest and Continental are partner airlines, but $162 and $251 is a BIG difference.