The all-conquering web trio of Expedia, Southwest and TripAdvisor are continuing their dominance at the head of the leading travel websites in the US.
The three brands sit at the head of the agency, destination and accommodation, and airline categories respectively.
TripAdvisor has more than double the market share of its category than second placed Hotels.com, while Delta is over 10% market share behind Southwest.
NB: Tnooz is now publishing monthly data from Experian Hitwise, rather than the previous weekly data.
Most popular travel websites in the US for May 2012:
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Destinations and Accommodation
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Travel search terms
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NB: Data couresy of Experian Hitwise