The USA domestic air transport is deregulated, so people can enjoy the lowest air fare in the World. There are also low cost airlines like Westjet flying Canada domestic routes.

But there are still no low cost airlines serving USA - Canada routes (America West is not a true low cost airline), so passengers have to pay high fare on travelling between USA & Canada, because of strict regulations like international routes.

So a question rises: Should regulations on USA - Canada air service be reduced, so allowing any airlines based in Canada & USA to operate routes flying between a Canada destination & an USA destination, like Westjet flying between Calgary & Los Angales & Jetblue between Toronto & New York, to make more choices & hence reducing fares (but USA-based airlines are not allowed to operate routes or segments between 2 Canadian destinations, while Canada-based airlines are not allowed to operate routes or segments between 2 USA destinations)?