Free upgrades are available to Mileage Plus members until July 8 on flights between the U.S. and Argentina or Uruguay. Purchase a qualifying roundtrip ticket in United Economy and you can travel in United Business if space is available at the time of ticketing. Those who purchase a qualifying roundtrip ticket at United Business rates may travel in United First if space is available at the time of ticketing. To take advantage of this offer, call (800) UNITED-1 and mention code MPL 015. For complete offer details visit http://www.united.com

United Mileage Plus elite members who travel abroad can also redeem their miles for hotels stays both domestically and internationally at participating Marriott and Radisson properties. Elite members who redeem their miles for this offer will be sent an award voucher for use at the time of check-in, but plan ahead, because the voucher may take up to four weeks for delivery.

If you would rather invest your miles in car rentals, you might be pleased to know that Mileage Plus elite members can qualify for two consecutive weekend days free when they redeem their miles for rentals from Avis, National, Alamo or Hertz. Members can get a weekend rental for as little as 10,000 miles, with no daily time or mileage charge, for a Compact, Intermediate, Midsize or Full-size car. This offer also requires an award voucher that can take up to four weeks for delivery. Miles must be redeemed via united.com to be eligible for both of the above offers. Elite members can redeem up to 150,000 miles in a calendar year for car and hotel certificates. For completed details or to redeem points, visit www.united.com.