Virgin mogul Richard Branson may be pimping his new spaceship these days, but thankfully the folks who are running his Virgin Atlantic airline aren’t ignoring earth-bound travel. Virgin Atlantic has an airfare deal going on right now on flights from various US cities to London that start as low as $558 round-trip. And if that sounds too good to be true, it might be – taxes & fees aren’t included in that price.

Still, it’s a fare that’s low enough to warrant further investigation, and may be the perfect deal for you. Some of the departure cities, and their corresponding best prices, are:

• New York – $558
• Boston – $576
• Washington D.C. – $614
• Chicago – $650
• San Francisco or Los Angeles – $844

In order to take advantage of this deal, you’ve got to book by August 5, 2008, and your ticket has to be for travel dates between October 23-December 17 or December 24 of this year and March 22, 2009. The deal requires a Saturday-night stay, and you can’t stay longer than one month. As always, remember to read all the deal details before you book.