USA 3000 sale to Mexico and Caribbean from $198 RT plus tax

USA3000 often has the lowest fares on its nonstop routes from its gateways to Mexico and the Caribbean. And now they're having a sale for travel through March 3 on many routes with fares as low as $99 each way, plus tax (which usually adds up to $100-$120).  This sale runs through Dec 14 and fares will be higher over peak holiday periods.