Why the downvote?

You can fly to the EU for 600 USD (retour), more in high season. Non business people are willing to spend 1200, 1400 USD. I assume around 2000 USD the demand will fall off significantly. At 5000 USD for economy it will be close to zero.

I just booked for the fall to London. Roundtrip was around $1200 from eastern US in economy with a couple of minor upgrades which is high but not ridiculous. The increment is basically a couple nights of hotels and meals. I've paid more; I've paid less. Was going to take ship back but it wasn't available for one person.