There are 60-day cruises from the US. Several of them are roundtrip but most are one-way. See the complete schedule of departures below.
60-day cruises depart from Fort Lauderdale, Los Angeles and Miami. So Florida and California are the options.
We also have schedules of 50-day cruises and 100-day cruises.
September 19, 2018: 60-day cruise on Princess Cruises. Round-trip from Los Angeles to Ketchikan (Alaska), Juneau (Alaska), Glacier Bay, Icy Strait Point (Alaska), Kodiak (Alaska), Kushiro (Japan), Tokyo (Japan), Osaka (Japan), Hiroshima (Japan), Incheon (Korea), Tianjin (China), Shanghai (China), Okinawa (Japan), Taipei (Taiwan), Hong Kong (China), Cai Lan-Halong Bay (Vietnam), Chan May (Vietnam), Ho Chi Minh City (Vietnam), Manila (Philippines), Guam (Mariana Islands), Honolulu (Hawaii) and Kauai (Hawaii).
October 10, 2018: 66-day cruise to Australia on Regent Seven Seas. One-way from Miami (Florida) to Sydney (Australia). Visit Havana (Cuba), Cartagena (Colombia), Golfito (Costa Rica), Puntarenas (Costa Rica), Cornito (Nicaragua), Puerto Quetzal (Guatemala), Acapulco (Mexico), Cabo San Lucas (Mexico), San Diego (California), Kahului (Hawaii), Honolulu (Hawaii), Hilo (Hawaii), Nuku Hiva, Fakarava, Bora Bora, Raiatea, Moorea, Tahiti, Pago Pago, Apia, Fiji, Norfolk Island (Australia), Auckland (New Zealand), Tauranga (New Zealand), Gisborne (New Zealand), Wellington (New Zealand), Christchurch (New Zealand), Dunedin (New Zealand), Burnie (Australia), Melbourne (Australia), Geelong (Australia) and Eden (Australia).
Have fun. Explore the world. Take a 60-day cruise.