If you click the Budget menu option above, you get to see something like the following:
The "hotel only" option is straightforward: it shows all cities where average nightly hotel rates (2 to 5 stars) fall within a price range. Filter down on those between $0 and $100 and you will be shown locations like Dubrovnik, Taichung and Berlin. Filter down on those above $350 and it's Tokyo or Bora Bora. This looks a bit like the following:
This states the hotel price (€118), and an estimated flight price (€142). While at some stage we would love to incorporate real average ticket prices into Travelindicator, for the time being that is not technically feasible. We could have chosen to omit it altogether and function solely as a hotel price aggregator, but that is no fun is it?
So we scoured the web and came across an article at the Rome2Rio Blog. They found that air fares could be linearly approximated by the formula ticket price = $50 + 0.11 * mile. We have slightly tweaked it, but essentially we do something similar. And we find it to provide a very reasonable approximation. Its accuracy will fluctuate, but Beijing to New York is never going to cost $200.
The "Hotels (2 night) + Flight" is based on all of the above. It uses the estimation of the costs for a round trip flight, and adds to that two times the average rate for a hotel. This gives you something like this:
Note how the hotel price (€118) is unchanged, but we now also show an estimated total trip cost (€434). With this you will be perfectly able to work out the difference in cost of a city trip to Berlin or to London.
Some things to clarify: If you are staying for more than two nights, we are sorry, but you will have to do your own calculation! Using the regular search you can do just that. Also, all of this is based on your location. If you load the site from different countries, you will get different results! Of course, you can manually adjust. The city you stay in impacts results and you will have to select it by yourself.