TRAVEL BARGAINS : EUROPE THE DESTINATION FOR BUDGET WEEKEND TRIPS.

Byline: Daily News

Low-cost European packages are offered through March 9 by Sabena Belgian World Airlines. ``Eurostay'' is a $459-per-person, double occupancy, weekend package that features air fare from New York, Boston, Atlanta or Chicago and two nights' lodgings in either Brussels or Antwerp.

``Eurorail'' provides round-trip air fare and a Eurail Flexipass for four days of first-class rail transport to any of 17 Eurail Pass countries within a two-month period; costs start at $649 per person. Costs for all packages are $100 higher Dec. 13-24; foreign departure taxes and fees add up to $50 per person. Information: [phone].

Sleeping in Seattle: The Seattle Super Saver Package offers up to 50 percent off room rates at 25 downtown Seattle hotels, plus savings on visitor attractions, shopping and dining, from Nov. 25 through March 31. To take advantage of the program, travelers must stay overnight at a participating hotel and make reservations through the hotel or by calling the Seattle Super Saver reservation line. Information: [phone].

Rocky Mountain high: From Dec. 2-15, Frontier Airlines offers round-trip air fare from Los Angeles and San Diego to Denver starting at $125 per round trip, in conjunction with a one-night stay at the Westin Hotel, Tabor Center Denver. The hotel's Holiday Weekend Package, at $98, includes double-occupancy lodgings for two people; the Holiday Theatre Package, at $193 per night, includes lodgings for two, free parking, tickets for two to productions of ``Carousel'' or ``A Christmas Carol'' and round-trip transportation to the performing arts center. Lodgings packages are available Dec. 7, 14 and 21. Airline reservations: [phone]. Hotel information: [phone].