Airlines sometimes make mistakes when filing fares — it’s human and understandable. But when major carriers keep erring and then punish paying customers by unilaterally canceling tickets days or even weeks after their issuance, that raises questions about competence and responsibility.

In late September, Swiss International Airlines filed a first-class one-way fare from Burma, also known as Myanmar, to Canada that was between $600 and $800 after taxes, depending on the specific routing. Was that an obvious mistake? Under normal circumstances, an educated traveler would probably say that it was. But there is much more to the story.

That was not the first time such a low fare out of Burma had been published. Just five months earlier, Korean Air issued tickets at similar prices — they were later canceled, but the Department of Transportation eventually forced Korean Air to reinstate them. Although I noticed that fare at the time, I didn’t bother to take advantage of it, suspecting it was, indeed, a mistake that wouldn’t be honored…