We had bought a flight from Europe to the USA, and recently we got an email that the flight back has been rescheduled. The change is significant: previously we would stay a few hours in one transit (European) airport, now we must instead spend the night at that airport. When we complain to the travel agency, they blame the airline and say that it is not their fault when the airline changes their schedules. We then contact the airline, and they blame the travel agency. The travel agency only gives us the offer to either accept the change, or get a refund (a refund is certainly not an option since we have booked several other activities in the US).
Due to some personal reasons, this flight change is quite manageable for us, however we can imagine that it could be disastrous for other travelers, and we think this is really outrageous customer service and we don't want to just accept it without any compensation. So our question is, what does the air travel regulations say about this? Are we entitled to some compensation or not?