They can never leave well enough alone.

The frequent flyer mavens at Virgin Atlantic flying club continue to “one-up” most of the rest of the industry.

On the heels of the latest “fly internationally in Business Class, get a free ticket” craze, Virgin takes it a step further.

Until Dec. 10, Upper Class passengers will receive two free Economy tickets on Virgin Atlantic to London, or two free tickets on Delta Air Lines to anywhere within the continental U.S., Alaska or Canada. Premium Economy passengers can earn one free ticket on Virgin or Delta.

The offer is only good for U.S. flying club members. All travel must be completed by December 15, which is a relatively short window — but let’s not look a gift Richard in the mouth.

Pre-registration at http://www.virgin-atlantic.com is required before travel commences.