Heads up - Do not reserve a trip two or more hours in advance. There are additional charges as well as the trip itself costs more than double. The only response from the help centre is that the cost matches the one that appeared before you reserve the trip. No reason as to why it costs so much. I have taken the exact same trip many times and three times were at the same time as the reservation. Therefore, the excuse of increasing the price due to traffic and other factors are negligible.