I travel to Sweden from The UK twice a year and it would be good to have an airplane pass for 10 years for example. To clarify I'd like to buy a ticket that allows me to travel on unlimited journeys via airplane from UK to Sweden for the period of 10 years.
Not really. There used to be one with American Airlines. There's a reason they can't do it though, and it's people like this guy, who clocked up 21 million dollars worth of flights. He'd fly to another country just for lunch, because he could. In today's air travel climate, you need to make some money on each seat, it's getting harder and harder to do with the competitive industry that it is.
Jetblue tried it in 2009. They've since cancelled it.
At least, that was the answer a year or so ago. Suddenly, a couple of incidents have changed this.
Air Asia is offering an unlimited monthly travel chance in SE Asia. There are lots of conditions, however.
And now just two months ago OneGo is attempting to be a startup offering unlimited flights for $1500 a month plus free checked bags precheck and wifi. However, if you're a semi-frequent business flyer you could clock that up pretty fast, so it'll be interesting to see how long they last.
However, aside from these occasional anomalies, there's really no such thing any longer. It's too expensive, and too risky for the airlines to do, aside from perhaps as a promotional (short-lived) endeavour.