Online travel giant Expedia is having an end-of-summer “Half Off Hotel Sale,” offering savings of 50 percent on stays of four or more nights at some 125 participating properties. Hundreds of other hotels are available at discounts of up to 30 percent during the promotion, which is good for stays through the end of September, as long as they are booked by September 2. Both room-only and air/hotel packages are available, with rates starting as low as $41 a night at the Stratosphere …

There’s still time to visit Alaska before the first snow flies, and from August 15 through September 15, you can save 50 percent at the state’s ever-popular Denali National Park, home of Mt. McKinley, the highest mountain in North America. Aramark, the operator of the park’s four hotels (McKinley Chalet Resort, Grand Denali Lodge, McKinley Village Lodge and Denali Bluffs Hotel), has a “Holiday Special” deal that provides your second night free. You’ll also get …

Halfway down the chain of islands in the Florida Keys is Duck Key, home of the 40-acre Hawks Cay Resort , known for fishing, water sports, a sailing school, and a dolphin encounter. Fresh from a $35 million refurbishing, the resort has a fourth-night-free promotion for stays through September 30 (except Labor Day weekend). Regular seasonal rates begin at $225 a night for a guest room or $295 for a two-bedroom villa, so with the freebie, your four-night stay could cost as little as $169 a …

To keep the guests coming after the summer vacation crunch dies down, Hyatt Resorts has rolled out a fall promotion called “Three for Free” that promises a free night, a free room upgrade, and full breakfast for two each day of your stay. The offer applies at 19 resorts around the U.S., the Caribbean, and Hawaii, for stays from September 1 through December 19. Prices vary by hotel and dates, and the number of paid nights required to get one for free ranges from two to five …

A Roman holiday can be yours in late fall or winter for as little as $905 per person, double, from New York. The Rome package from TourCrafters, a leading operator to Europe, is available from November 15, 2008 through March 15, 2009. It provides roundtrip air (including fuel surcharges), four nights at the three-star Hotel Brasile in the heart of the city (upgrades are available), daily breakfast buffet, and hotel service charges and taxes. Airport and government taxes of $122 per person are …

The “new” Sheraton Cable Beach Resort in Nassau, Bahamas – they’re calling themselves new because the resort recently finished a complete renovation – has a new “Love Your Family” package available from now through March 2009 (the booking deadline is December 31), with nightly rates beginning at $219 per room. However, that rate includes a generous resort credit of $100 per day, so if you use it up, you’re essentially paying as little as $119 for your room. …

The classic Addison Mizner-designed Boca Raton Resort & Club , halfway between Ft. Lauderdale and Palm Beach airports, calls this deal the “Labor Day Third Night Free plus Free Massage” package. But it’s actually available from now through September 30 (better book fast -- when we checked, some nights were already sold out). Nightly package rates start at $169 for the two paid nights, so with the free night, your actual nightly cost over three nights could come as low as …

After a summer of sky-high prices for travel to Europe, it’s a relief to see packagers coming out with sub-$1,000 deals for the off-season. Example: The Prague City Break Special from EuropeASAP, which is priced as low as $859 per person, double, from New York (other departure cities are available) for travel from October 27 to December 11 and again January 7-March 19. That provides roundtrip air, six nights in a hotel, hotel tax and service charges, and daily continental breakfast. …

Royal Caribbean has posted sale fares for seven-night Mexican Riviera cruises out of Los Angeles this fall aboard its Vision of the Seas. Prices start as low as $499 per person, double, for inside cabins, or $629 for ocean-view staterooms, on five departures – October 5, 12, 19, and 26; and November 2. Rates for balcony cabins begin at $1,199. The cruises call at Cabo San Lucas, Mazatlan, and Puerto Vallarta before returning to Los Angeles. The rates do not include a fuel surcharge of $10 per …

Regent Seven Seas Cruises, the luxury line known for its all-suite, all-balcony vessels, has come out with an early booking offer for nine Europe cruises in 2009: Book by October 15 and you’ll get discounts up to 50 percent off brochure rates plus free roundtrip air. The best deals are an October 30, nine-night Istanbul to Rome cruise from $4,195 per person, double; and a June 20 10-night sailing from Istanbul to Barcelona, starting at $4,695. For five seven-night Med cruises in July …

Hong Kong-based Cathay Pacific Airways has some pretty good limited-time bargains, if you take the time to check its web site for its “Deal of the Month,” an Internet-only offer. This month (book by August 31), Cathay has sale fares to India, starting at $1,197 roundtrip from San Francisco or Los Angeles to Chennai, or $1,374 from either city to Mumbai, Delhi, or Bangalore. Comparable rates from New York are $1,247/$1,424. That includes a few hundred dollars in fuel surcharges, …

Transatlantic fares are dropping, as the generally do, for fall and winter travel. Germany’s Lufthansa has a sale going on from now through August 20, good for outbound travel from October 27 through March 25 (except December 11-25). Roundtrip fares to Frankfurt start as low as $448 from New York or $536 from Chicago. Comparable fares to London are $520/$606; to Amsterdam, $560/$686; and to Madrid, $528/$636. Other departure cities are also available. The fares require a Saturday night …