Believe it or not, there's still time to book the perfect summer cruise. Reach out to a travel agent today to find the ideal cruise line, ship and itinerary for your summer getaway. In the meantime, here's some inspiration in the form of 20 sailings you can still book.

Norwegian Cruise Line's seven-day western Caribbean sailing from Miami aboard the Norwegian Breakaway features calls in Roatan, Honduras, Costa Maya and Cozumel, Mexico as well as Harvest Caye, Belize, where guests can enjoy zip lines and ropes courses along with a 15,000 square foot pool featuring a swim-up bar.

Norwegian Cruise Line also offers a four-day cruise to Cuba and the Bahamas from Miami that features a full day and night in Havana. There are a number of the abbreviated sailings aboard the newly refurbished Norwegian Sky to choose from this summer.

Looking to scratch Alaska off of your bucket list? Consider Holland America Line's seven-day Alaskan Inside Passage itinerary from Vancouver. There's still time to secure an interior stateroom on an upcoming summer voyage for under $1,000 per person.

Paul Gauguin Cruises' seven-night Society Islands & Tahiti Iti sailing is available for June, July and August departures. Guests will tour wild coastline, ancient petroglyphs and temples, all while soaking up authentic Polynesian culture.

Seabourn is offering a handful of exciting Northern Europe voyages this summer. Discerning travelers should consider the 21-day Route of the Vikings I, which explores the British Isles, Iceland and Greenland.

Meanwhile, budget-conscious travelers can score a great deal on a veranda suite aboard Seabourn's seven-day St. Petersburg & The Baltic itinerary sailing from Stockholm, Sweden to Copenhagen, Denmark.

Viking Ocean Cruises offers a plethora of exciting voyages all over the world, including the 10-day Empires of the Mediterranean sailing from Venice to Athens that visits as many as five different countries. Book now and save up to $300 per person on air.

Couples might consider booking an eight-day Romantic Danube sailing with Viking River Cruises. You'll have to act fast though as availability on upcoming summer voyages is limited.

Award-winning small ship cruise line Windstar Cruises is offering some stellar deals on summer cruises, including the eight-day Gaelic Explorers voyage sailing from Dublin to Edinburgh departing June 20.

Few travel experiences are as rewarding as a river cruise with AmaWaterways. See more of Europe in less time this summer on the seven-night Captivating Rhine itinerary passing through France, Germany, Netherlands and Switzerland.

There's still room on American Queen Steamboat Company's 16-day Racing on the River cruise from Memphis to Pittsburgh departing from Tennessee on July 7. Enjoy 24-hour room service and complimentary Hop-On Hop-Off shore excursions in each port of call, among other highlights.

Guests sailing to Alaska this summer can take advantage of special offers from Regent Seven Seas Cruises. Seven Seas Mariner will sail a seven-night voyage from Vancouver to Seward July 24 and from Seward to Vancouver July 31.

Right now, travelers can score a great deal on one of Royal Caribbean International's Bahamas & Perfect Day Cruises departing this summer. Average per person rates are under $500 and you can receive as much as 50 percent off for your second guest.

There's also awesome deals available on Royal Caribbean's five-night Key West Havana Holidays Cruise from Fort Lauderdale aboard Majesty of the Seas with interior and ocean view staterooms still available on August 5 and August 19 departures.

Carnival Cruise Line still has space available on a number of exciting summer voyages, including three-day sailings from Long Beach, California to Baja Mexico. You can book an interior stateroom for under $400 before taxes, fees and port expenses.

For guests seeking a longer getaway, Carnival offers a seven-day southern Caribbean cruise from San Juan, Puerto Rico featuring stops in St. Thomas, St. Maarten, St. Kitts, St. Lucia and Barbados. Average per person rates start at just $644 for a July 14 departure.

For families, Disney Cruise Line still has room aboard its seven-night eastern Caribbean from Port Canaveral featuring a stop at Castaway Cay, Disney's private island paradise. Choose from an August 10 or August 24 departure.

Hurtigruten's 15-day Northwest Passage sailing aboard MS Fram departing August 30 is a great way to conclude your summer as you'll follow in the footsteps of history's greatest explorers. Prices start at $13,739 per person.

The average per person price starts at just $609 for MSC Cruises' July 29 departure to the Caribbean, Cuba and Antilles, featuring stops in Honduras and Mexico.

Discerning globetrotters with a considerable amount of time off should look no further than Silversea Cruises' 25-day Nome, Alaska to Tromso Arctic cruise departing August 10 aboard Silversea Explorer.