Skiplagging. How is it ever cheaper to go from point A-B-C than it would be to go A-B?

Question

I understand that skiplagging is finding a flight that is cheaper to go from point A, to B, with a planned trip to C, but just leaving the airport at B.

I don’t understand the basic concept of how this happens though. How is a flight from A-B-C, ever cheaper than a flight just A-B? The extra cost of the C leg would have to be entirely absorbed by the savings from A-B, how is that possible?

In: 23

Answer 1

Good to know the term. greyhound, back in the day was the same. Buy a ticket to Toronto, get off wherever you needed to before that.