Before anyone pounces on me, this doesn't relate to a MR... nor is it on the LAn site but -

I was looking for a one way from DEL-LHR (BA)- YYZ(AC) and was on cheapoair.com. Anyway if I select a mon-wed search (I tried nov 12, 17,18,19) the cheapest fare is on BA/AC .. and the total taxes are $50. Now granted the ticket is still expensive (~~$650) but I wonder if this is a similar issue to the LAN one. Soneone here might be able to figure it out.

Oddly if I try del - was for the same dates the taxes are much much higher (as they normally are).

any thoughts?