But if you're in Croatia you can get flights to London $200 etc... geofenced deals marketing deals to try and coerce people into taking holidays.
But no as I mentioned above lots of holiday destinations have cheap tickets inbound, but out bound are expensive. I first noticed it travelling from London to Croatia.
It was like $200 flight to Split, but the flight home was double or triple. I hopped on a proxy, and found I could get the reverse deal from Split to London. $200 to London, $600 back home to split. So I started gaming the system.
The agencies are hedging on the fact you have to take the return flight. So they coerce you into the cheap flight to location X, but claw the money back with the return flight which I guess the vast majority of people have to take.
The other one is clear your cookies before booking. Places create fake demand by disappearing the cheap flights on you if you shopping around. If you clear your cookies the cheap flights will return.