An extraordinary airfare deal is up for grabs today (and today only!) from LAN Airlines (formerly known as LAN Chile) to Santiago, Chile.

The South American carrier has published a round-trip rate of $199 for trips from Atlanta to Santiago. Required is a two-week or more advance notice of travel. The offer is valid only on Fridays and Saturdays. Start trips on or before Dec. 9. Stay up to 90 days.

LAN serves Santiago via a one stop connection in Miami.

Rush to buy this amazing offer. It seems clear that the $199 is a human typing error. For example, Delta's lowest round-trip rate on trips to Santiago during this same travel period is $1,019, or $1,683.50 inclusive of all taxes and fees.

The total ticket rate on LAN is $827.50.

Sale airfares are always subject to change. Every seat on every flight is not offered at the lowest rate. Since only a limited supply of seats is available, act quickly to make your purchase. I recommend starting the search for available seats at Kayak.com vs. calling an airline directly.

You can also search for the sale at travel Web sites such as Expedia or Travelocity, etc. Airlines can discontinue or pull a sale price without notice when the offer does not have a "ticket-by" date or when the offer is deemed "sold out."

Clara Bosonetto is a retired travel consultant.