Contrapositivity

As a note, JetBlue roundtrip from Dulles ~> San Francisco is 334.60. It appears to be their normal rate--it's not advertised as "on sale" and the rates are identical for all Dulles-SFO flights leaving 10/24 and returning 10/29. $200 it ain't, but JetBlue = maybe option, for us at least? They do have the lowest luggage loss rate in the industry... >>;