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Megabus, the low-fare bus company, is giving away 200,000 free seats for travel in the United States and to Toronto, based on availability. Travel Jan. 4 through March 1. Book at www.megabus.com, using promo code GOFREE. Service charge of 50 cents is additional.

NYC and Co. is kicking off its Signature Collection Third Night promotion in New York City. Stay two consecutive nights at any of 20 Signature Collection hotels and receive a free third night, plus a Key to Madison Avenue card, an access pass to 70 special offers at boutiques, spas, restaurants and art galleries. Prices vary by property and date. For example, in mid-January, three nights in a premier room at the Mandarin Oriental with a Hudson River view costs $1,832, with taxes -- a savings of $916. Other hotels include the Jumeirah Essex House, the Hotel Plaza Athenee New York and Ritz-Carltons in Battery Park and Central Park. For the Oriental: (212) 805-8800, www.mandarinoriental.com/newyork; use promo code TNW12. Restrictions on room type may apply. Valid Jan. 2 through Feb. 29. For deal info and hotels: www.nycgo.com/thirdnight.

Watch the whale migration from Kaanapali Beach Hotel on Maui and save at least $175. The Whale Encounter package costs $1,574 double, with taxes, and includes four nights in an ocean-view room, daily compact rental car, daily breakfast, whale-watching tour, two bottles of water per day, two beach towels, picnic lunch with backpack, and one-day rental umbrella and chaise lounges. By comparison, four nights in an ocean-view room is more than $900. Book by April 1; travel by April 8. Info: (800) 262-8450, www.kbhmaui.com.

International Expeditions is offering a $1,000 discount on the March 30 departure of its Galapagos Voyage. Price after discount starts at $4,098 per person double. The trip aboard the 32-passenger Evolution includes a seven-night cruise; daily naturalist-guided excursions including hiking, swimming and snorkeling; two nights at Hotel Oro Verde in Guayaquil, Ecuador; most meals; transfers; and taxes. In-country airfare of $441, which must be purchased through International Expeditions, and the $110 Galapagos National Park entry fee are extra. International air to Guayaquil is extra. Info: (800) 234-9620, www.ietravel.com.

Deals sell out and availability is not guaranteed. Some restrictions may apply.