Deal lasts through Thursday

Southwest Airlines is jumping on the "6-7" trend.
The airline is offering $67 flights for basic economy tickets, calling it the "trendiest sale ever."
The deal applies to Tuesday and Wednesday domestic flights between January 6 and March 4 for some destinations.

The fares will not be available for all flights during some busy travel times and holidays.
Tickets have to be purchased by December 18.
"6-7" is a phrase used mainly by kids and teens.
Nobody can explain exactly what it means, but almost everybody has heard it.