Although oil prices rose rapidly in the last years and continued into 2006, a UNWTO study concluded that the impact on tourism was limited. Firstly, when the increase is analyzed in light of previous oil crises in constant US dollars or constant euros, it suggests that oil prices are catching up with inflation, rather than speeding ahead of other price indices. Secondly, the rise in oil prices has had limited impact on tourism prices. In 2004, 2005 and further in 2006, increases in the prices of tourism products and services have not been significant enough to influence consumer behavior. It seems that airlines absorbed the extra burden and did not pass on the full increase in cost to passengers for fear of losing customers in a very competitive market.