system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why is a flight to London more expensive than a flight to Edinburgh, Scotland when I have to connect in London?

My wife and I recently came back from our honeymoon in Edinburgh, Scotland. When we originally researched destinations, we looked at London and round trip tickets for both of us were around $3,000. We ended up choosing Edinburgh and bought the tickets, which ended up being $2,200. The thing was, we had to connect in London to get to Edinburgh. Why was it less expensive? What's stopping people from just buying a ticket to Edinburgh and purposefully missing their flight to stay in London and save $800?
gpt
Never confuse the price of something with the cost of something.  The price of something is a reflection of how much people are willing to pay.  The airline made a profit flying the two of you to Edinburgh via London.  They're making $800 more profit from the ones getting off at London.