Book before this date to save money on your summer vacation

June in France, July in Thailand or August at New England's best beaches are all totally doable.

Break out your calendar and outsmart the airlines by planning your summer vacation around the cheapest dates to book a flight.

According to USA Today, if you're staying domestic it's best to book before May 20, because airfare increases on May 21.

If you can't make that date, definitely book before June 15, or wait for a late summer trip post August 30.

On the bright side, it takes the whole summer for East coast waters to get warm.

If a London vacation is more your cup of tea, get booking fast. May 12, is when summer Europe fares jump.

RELATED: Places to travel in 2017

18 PHOTOS
Vacations to take in 2017
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Vacations to take in 2017
Eleuthera, Bahamas

Get to know Eleuthera, one of the beautiful islands of the Bahamas, by water! Take a surf lesson or grab snorkel gear and take advantage of the crystal blue seas. 

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Big Sur, California, USA

Head over to the west coast to see California's Big Sur! Enjoy a walk to the gorgeous McWay Falls or take a tour to the famous Bixby Bridge

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Monaco, Europe

Walk around the Monte Carlo Harbor and take in the picturesque views of the Mediterranean coastline! After you see the harbor, don't miss the shopping and sight seeing in Casino Square.

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Portland, Maine, USA

Take the scenic route to Maine's Portland Head Lighthouse! Walk along the coast and get to know all of the stories and history that surrounds this charming town.

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To Sua Trench, Upolu, Samoa

After you spend an adventurous day swimming and diving in the To Sua Trench, head back to the Sinalei Reef Resort & Spa to relax by the pool or bar.

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Zermatt, Switzerland

Head to the lovely town of Zermatt and visit the unbelievably beautiful Matterhorn! With tickets for all age and experience levels, this mountain is a must-see sight for all visitors. 

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The Treasury, Petra, Jordan

Walk to the Treasury and be awe-struck by this historic monument! You can also opt to see the legendary Monastery or even tour Petra at night. 

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Marble Cathedral, General Carrera Lake, Chile

If you are ever in Chile, you have to see the Catedral de Marmol (Marble Cathedral)! While you will need a boat to get there, the experience will be well worth it.

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Avenue of the Baobabs, Morondava, Madagascar

Madagascar is home to a ton of beautiful plants and animals, and the Avenue of the Baobabs is one of the most majestic. Walk under these massive trees and later visit the Andasibe-Mantadia National Park.

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Cartagena, Colombia

Tour the walled city of Cartagena and enjoy the colorful culture of Colombia! And make sure you don't miss out on the city's incredible seafood!

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Blue Lagoon, Grindavik, Iceland

After a long day of exploring the gorgeous city of Grindavik, take a dip in the heated Blue Lagoon. This geothermal lagoon's water is rich with minerals and the perfect addition to any chilly vacation.

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Bryce Canyon National Park, Utah, USA

Visit one of the USA's glorious national parks by air and on foot! Book this flight and ground tour for a comprehensive look at the incredible landscape that is Bryce Canyon.

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Lion's Head, Cape Town, South Africa

By hopping on a sea kayak and bike tour of Cape Town you'll be able to interact with wild life and take in the amazing views of both Lion's Head and Table Mountain!

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Bagan, Myanmar

Feel like you have gone back in time by visiting the stunning temples in Bagan, Myanmar! Go for a full or a half day and tour these ornate pagodas and temples. 

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Mykonos, Greece

Mykonos is full of memory making opportunities. Try out a cooking class, walking tour or a museum visit to see all the facets of this amazing Grecian city. 

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Joshua Tree National Park, California, USA

Travel around Joshua Tree National Park and take in the incredible landscapes! This educational tour will show you around this national park and offers two different hikes for visitors.

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Moraine Lake, Banff National Park, Canada

Banff National Park is truly Instagram heaven. With opportunities for photography adventures in the Canadian Rockies and day trips to the Mountain Lakes and Waterfalls, every turn will take you to another picturesque scene.

Book now!

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Try to depart on May 11, for the cheapest summer fares and maybe you'll actually score good seats to the London Theater as an added bonus.

Similarly, book a trip to Asia before May 15, or at least by June 9, if you miss that date. Spend July 4, at home and book after August 20.

Remember, don't keep those vacation dates a secret and let your family know when to get seats. You don't want to be stuck FaceTiming, while your family is at the beach.

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