Virgin's market profile is to fly to tourist destinations that attract a good amount of British tourists. Now, for the most part, the higher-yieldings ones are flown with low-density aircraft out of Heathrow and the lower yielding ones are served with high-density aircraft out of Gatwick. Denver, Seattle, Houston, and Dallas do not fit this profile. They are not "hot spots" for British tourists. Neither is Chicago, which is one reason Virgin was unable to make the Chicago market work despite how huge it is.