Region gets boost in U.S. airlift February 06, 2001 Share 1 -- MINNEAPOLIS -- Worry-Free MLT Vacations here teamed with the marketing committee of the Puerto Vallarta Tourism Board to boost seasonal nonstop airlift from several U.S. cities. The service will be supported with an "aggressive advertising campaign," including ads in the major daily newspapers in each of the new gateway cities, according to the operator.Worry-Free contracted with Champion and Northwest airlines for the charter service to Puerto Vallarta.The following cities were added:Denver, with Saturday and Wednesday service via Champion through May 30.Detroit, with Wednesday and Saturday service via Northwest through April 14, and Saturday service via Champion through April 28. Detroit also will receive additional service on Wednesdays via Champion from March 7 to April 25.Minneapolis/St. Paul, with Wednesday and Saturday service via Champion through April 21; Saturday service via Northwest through April 28; daily service via Northwest through March 31, and additional service on Fridays via Champion from Feb. 9 to April 6.St. Louis, with Monday and Friday service via Champion through April 23.Dallas, with Wednesday and Saturday service via Champion through May 30.Memphis, with Saturday service via Champion through April 28 .Sample package rates include travel from Denver at $445 per person, double, for a seven-night stay and $425 for a four-night stay for travel starting April 7; Memphis at $342 for a seven-night stay in March, and Minneapolis/St. Paul at $515 for a three-night stay, starting April 4.For more information or reservations, call (800) 328-0025 or visit the Web site at www.worryfreevacations.com.