The cheapest one-way ticket from HNL to CEK (Chelyabinsk) tomorrow costs $2100. Getting there as quickly as possible (so leaving today and taking only 35h to get there) costs $3k.

Source: your favourite meta-search. And since I work for one, I won't link any :).

It was around $3-4K, in the summer, and it was from Kauai.

He's probably just a Russian who got disturbed on his vacation, you might be overestimating the excitement.

If we're sharing, my longest one to date is:

Cuzco - Lima (long layover, we got to visit Museo Larco and eat pizza) - Panama - Dominicana (technical stop, but we had to disembark) - Frankfurt - Moscow.

It was pretty painless, I only regret missing one lunch by being asleep.