I got tickets for a friend on Orbitz. There was a connecting flight but the details of changing planes was not disclosed. The two flights were so close together there was no time to claim baggage and go back through customs.
Orbitz failed to disclose that the two airlines had no baggage transfer agreement. The only way to make the connecting flights was to have carry on luggage only (good luck for a month long international trip) and to RUN. Orbitz change fee was twice what the airline charged on the spot.
The overcharge for a change aside, Orbitz irresponsibly linked two flights that could not be connected and refused to compensate for their error.