Travel website Kayak has a hidden easter egg reference to ABC's TV drama Lost.

Search Kayak for flights from Sydney's SYD airport to Los Angeles's LAX and you'll see that Oceanic Flight 815 — the very one that crashed on the mysterious island in the first episode of Lost — is one of your options.

That's exciting if you're looking to get stranded on a desert island dotted with smoke monsters, apparitions, crazy science experiments, electromagnetic abnormalities, immortals, polar bears, mysterious hatches, giant four-toed statues and warring factions of scientists.

The Oceanic flight is four times as expensive as the next-cheapest one, and well, it's obviously not real. Actually, try to buy the ticket and you'll be redirected to a Lost wiki entry on Oceanic Flight 815. Read a bit about what happened to the flight on that wiki and you'll be glad you couldn't get a seat.

This little easter egg is no doubt a grab for press with next week's season premiere of Lost coming up. It'll be the final season, so hype is at a maximum. This kind of web and social media viral marketing actually fits well with the spirit of the show, which was promoted in its early days with similar easter eggs, viral campaigns and reality games.