Southwest is offering $25 off a future round-trip flight when you purchase a Southwest gift card of $100 or more. The card must be purchased online with a U.S.-issued Visa card by June 30. The $25 fare discount is valid for ticket purchases made between July 1 and Aug. 30, with a seven-day advance purchase, for travel Aug. 18 through Nov. 19. Travelers will receive the $25 airfare discount by e-mail. One fare discount per cardholder or e-mail address. Go to www.southwest.com/rapid rewards/giftcard visa. html.

Guests at participating Marriott Hotels and Resorts will receive a $25 Visa gift card when they pay for their stay with a Visa card. The offer is valid on weekend and Stay for Breakfast rates for stays through Sept. 1 in the continental U.S. A Friday or Saturday night stay is required. The gift card is valid for use through Nov. 30. Use code V12 when booking. Restrictions apply. Contact: 877-627-7468; www.marriott.com.