31 days in United States Itinerary
Created using Klarna Trips United States route planner
Start: Bucharest
Fly
1
Boston
— 3 nights
Fly
2
New York City
— 4 nights
Drive
3
Princeton
— 1 night
Fly
4
Niagara Falls
— 1 night
Fly
5
Washington DC
— 5 nights
Fly
6
Miami
— 5 nights
Fly
7
Las Vegas
— 4 nights
Fly
8
San Diego
— 3 nights
Fly
9
San Francisco
— 3 nights
Fly
End: Bucharest
Wed, May 1 - Fri, May 31
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Boston — 3 nights

Beantown
You'll discover tucked-away gems like Old North Church & Historic Site and Museum of Fine Arts. There's still lots to do: wander the streets of Beacon Hill, get curious at Museum of Science, stroll around Boston Common, and take an in-depth tour of Boston Tea Party Ships & Museum.
To see ratings, more things to do, and more tourist information, read Boston planning tool.
Bucharest, Romania to Boston is an approximately 15-hour flight. The time zone difference when traveling from Bucharest to Boston is minus 7 hours. While traveling from Bucharest, expect little chillier days and about the same nights in Boston, ranging from highs of 22°C to lows of 11°C. Finish your sightseeing early on the 4th (Sat) so you can fly to New York City.
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To see ratings, more things to do, and more tourist information, read Boston planning tool.
Bucharest, Romania to Boston is an approximately 15-hour flight. The time zone difference when traveling from Bucharest to Boston is minus 7 hours. While traveling from Bucharest, expect little chillier days and about the same nights in Boston, ranging from highs of 22°C to lows of 11°C. Finish your sightseeing early on the 4th (Sat) so you can fly to New York City.
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New York City — 4 nights

Big Apple
Discover out-of-the-way places like New York Botanical Garden and New York Public Library. The adventure continues: go for a walk through Central Park, take in the architecture and atmosphere at St. Patrick's Cathedral, take a stroll through Greenwich Village, and let your taste buds guide you at a local gastronomic tour.
For photos, other places to visit, reviews, and tourist information, use the New York City itinerary builder.
Traveling by flight from Boston to New York City takes 2.5 hours. Alternatively, you can drive; or take a train. In May, plan for daily highs up to 24°C, and evening lows to 15°C. Wrap up your sightseeing on the 8th (Wed) early enough to drive to Princeton.
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For photos, other places to visit, reviews, and tourist information, use the New York City itinerary builder.
Traveling by flight from Boston to New York City takes 2.5 hours. Alternatively, you can drive; or take a train. In May, plan for daily highs up to 24°C, and evening lows to 15°C. Wrap up your sightseeing on the 8th (Wed) early enough to drive to Princeton.
Side Trip
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Princeton — 1 night

College Town
Kick off your visit on the 9th (Thu): gain insight at Princeton University, then walk around Grounds For Sculpture, and then admire the majestic nature at Delaware and Raritan Canal State Park.
To see where to stay, photos, reviews, and other tourist information, read Princeton attractions site.
You can drive from New York City to Princeton in 1.5 hours. Alternatively, you can drive; or take a train; or take a bus. In May, daily temperatures in Princeton can reach 26°C, while at night they dip to 13°C. Finish your sightseeing early on the 9th (Thu) so you can fly to Niagara Falls.
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To see where to stay, photos, reviews, and other tourist information, read Princeton attractions site.
You can drive from New York City to Princeton in 1.5 hours. Alternatively, you can drive; or take a train; or take a bus. In May, daily temperatures in Princeton can reach 26°C, while at night they dip to 13°C. Finish your sightseeing early on the 9th (Thu) so you can fly to Niagara Falls.
Side Trips
Find places to stay May 8 — 9:
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Niagara Falls — 1 night

Honeymoon Capital of the World
Start off your visit on the 10th (Fri): admire the striking features of Frank Lloyd Wright's Martin House, then make a trip to Schoellkopf Power Station, then enjoy breathtaking views from Niagara Falls Observation Tower, and finally make a trip to Third Street Art Alley.
To find more things to do, ratings, reviews, and more tourist information, go to the Niagara Falls online holiday builder.
Traveling by flight from Princeton to Niagara Falls takes 3 hours. Alternatively, you can drive; or take a train. In May, plan for daily highs up to 24°C, and evening lows to 11°C. Wrap up your sightseeing on the 10th (Fri) to allow time to fly to Washington DC.
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To find more things to do, ratings, reviews, and more tourist information, go to the Niagara Falls online holiday builder.
Traveling by flight from Princeton to Niagara Falls takes 3 hours. Alternatively, you can drive; or take a train. In May, plan for daily highs up to 24°C, and evening lows to 11°C. Wrap up your sightseeing on the 10th (Fri) to allow time to fly to Washington DC.
Side Trip
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Washington DC — 5 nights

Explore hidden gems such as Tidal Basin and U.S. Marine Corps War Memorial. There's much more to do: pause for some photo ops at Korean War Veterans Memorial, get to know the fascinating history of National Mall, take an in-depth tour of Smithsonian American Art Museum, and stroll the grounds of Arlington National Cemetery.
To see more things to do, other places to visit, where to stay, and more tourist information, read our Washington DC online vacation planner.
Traveling by flight from Niagara Falls to Washington DC takes 3 hours. Alternatively, you can drive; or take a train. Expect a bit warmer temperatures when traveling from Niagara Falls in May; daily highs in Washington DC reach 28°C and lows reach 17°C. Cap off your sightseeing on the 15th (Wed) early enough to catch the flight to Miami.
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To see more things to do, other places to visit, where to stay, and more tourist information, read our Washington DC online vacation planner.
Traveling by flight from Niagara Falls to Washington DC takes 3 hours. Alternatively, you can drive; or take a train. Expect a bit warmer temperatures when traveling from Niagara Falls in May; daily highs in Washington DC reach 28°C and lows reach 17°C. Cap off your sightseeing on the 15th (Wed) early enough to catch the flight to Miami.
Side Trip
Find places to stay May 10 — 15:
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Miami — 5 nights
©
Magic City
You'll discover tucked-away gems like Fishing Charters & Tours and Wynwood Walls. Get out of town with these interesting Miami side-trips: African Queen Canal Cruise (in Key Largo), Everglades National Park (Gumbo Limbo Trail & Anhinga Trail) and Florida Keys Wild Bird Rehabilitation Center (in Tavernier). The adventure continues: take in the local highlights with Walking tours, walk around South Pointe Park, enjoy the sand and surf at Bill Baggs Cape Florida State Park, and test your team's savvy at popular escape rooms.
For more things to do, photos, reviews, and other tourist information, you can read our Miami itinerary planning app.
Fly from Washington DC to Miami in 4.5 hours. Alternatively, you can drive; or do a combination of taxi and bus. In May, Miami is somewhat warmer than Washington DC - with highs of 36°C and lows of 27°C. Cap off your sightseeing on the 20th (Mon) early enough to catch the flight to Las Vegas.
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For more things to do, photos, reviews, and other tourist information, you can read our Miami itinerary planning app.
Fly from Washington DC to Miami in 4.5 hours. Alternatively, you can drive; or do a combination of taxi and bus. In May, Miami is somewhat warmer than Washington DC - with highs of 36°C and lows of 27°C. Cap off your sightseeing on the 20th (Mon) early enough to catch the flight to Las Vegas.
Side Trips
Find places to stay May 15 — 20:
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Las Vegas — 4 nights
©
Sin City
You'll explore the less-touristy side of things at Food Tours and Wayne Newton's Casa de Shenandoah. Explore the numerous day-trip ideas around Las Vegas: Boulder City (Hoover Dam & Winged Figures of the Republic Statues). Next up on the itinerary: admire the local landmark of Fountains of Bellagio, see the interesting displays at Counts Kustoms, explore the stunning scenery at Red Rock Canyon National Conservation Area, and take a pleasant ride with a tour on horseback.
To find maps, ratings, where to stay, and more tourist information, refer to the Las Vegas trip planner.
Traveling by flight from Miami to Las Vegas takes 6.5 hours. Alternatively, you can drive; or take a bus. The time zone difference moving from Eastern Standard Time (EST) to Pacific Standard Time (PST) is minus 3 hours. Plan for slightly colder nights when traveling from Miami in May since evenings lows in Las Vegas dip to 20°C. Finish your sightseeing early on the 24th (Fri) to allow enough time to fly to San Diego.
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To find maps, ratings, where to stay, and more tourist information, refer to the Las Vegas trip planner.
Traveling by flight from Miami to Las Vegas takes 6.5 hours. Alternatively, you can drive; or take a bus. The time zone difference moving from Eastern Standard Time (EST) to Pacific Standard Time (PST) is minus 3 hours. Plan for slightly colder nights when traveling from Miami in May since evenings lows in Las Vegas dip to 20°C. Finish your sightseeing early on the 24th (Fri) to allow enough time to fly to San Diego.
Side Trip
Find places to stay May 20 — 24:
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San Diego — 3 nights

America's Finest City
Eschew the tourist crowds and head to Lions, Tigers & Bears and Coronado Island. Next up on the itinerary: stroll around Balboa Park, test your problem-solving skills at popular escape rooms, kick back and relax at La Jolla Shores Park, and take in the views from Coronado Bridge.
For ratings, photos, where to stay, and more tourist information, go to the San Diego trip planner.
Fly from Las Vegas to San Diego in 3 hours. Alternatively, you can drive; or take a bus. Expect little chillier weather when traveling from Las Vegas in May: highs in San Diego hover around 25°C, while lows dip to 19°C. Wrap up your sightseeing on the 27th (Mon) to allow time to fly to San Francisco.
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For ratings, photos, where to stay, and more tourist information, go to the San Diego trip planner.
Fly from Las Vegas to San Diego in 3 hours. Alternatively, you can drive; or take a bus. Expect little chillier weather when traveling from Las Vegas in May: highs in San Diego hover around 25°C, while lows dip to 19°C. Wrap up your sightseeing on the 27th (Mon) to allow time to fly to San Francisco.
Side Trips
Find places to stay May 24 — 27:
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San Francisco — 3 nights

City by the Bay
You'll discover tucked-away gems like Wine Tours & Tastings and San Francisco Bay Bridge. There's still lots to do: step off the mainland to explore Alcatraz Island, walk around Presidio of San Francisco, explore the activities along San Francisco Bay, and see the interesting displays at Cable Car Museum.
To find photos and other tourist information, refer to the San Francisco vacation planning app.
Fly from San Diego to San Francisco in 3 hours. Alternatively, you can drive; or take a bus. Traveling from San Diego in May, San Francisco is slightly colder at night with lows of 13°C. Finish up your sightseeing early on the 30th (Thu) so you can catch the flight back home.
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To find photos and other tourist information, refer to the San Francisco vacation planning app.
Fly from San Diego to San Francisco in 3 hours. Alternatively, you can drive; or take a bus. Traveling from San Diego in May, San Francisco is slightly colder at night with lows of 13°C. Finish up your sightseeing early on the 30th (Thu) so you can catch the flight back home.
Find places to stay May 27 — 30:
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New Jersey travel guide
The Garden State
Often overshadowed by its legendary neighbor, New York, New Jersey holds its own as a land of thriving industrial cities, sprawling farmland, and lively coastal towns. Called the Garden State, New Jersey is a hub of entertainment and cultural attractions for the east coast, from the famous sandy beaches and carnival-like atmosphere of the Jersey Shore to alluring Atlantic City, the Las Vegas of the east. New Jersey also boasts a wealth of historical places to visit, including battle sites and memorials, such as George Washington's Revolutionary War headquarters.