Stopovers of over 24hours routinely add around $150 to a trip: perhaps to protect Jeddah as a destination, though maybe origin taxes for Jeddah com into play. This is probably built into the ticket price quoted above - suggesting it could be significantly cheaper if you can find a <24H transfer.

The other consideration is that transfers of over 12H require a transit visa, whether or not you choose to stay airside: that's another $100. It's something Saudia polices at check-in, though it's not entirely clear if the rule is enforced and if challenged at check-in you could affirm that you intend to get a visa on arrival: but it's a concern. .