15 days in United States Itinerary

A tiny city just 16 km (10 mi) long, Marathon is spread across several islands in the middle of the Florida Keys.

Start off your visit on the 6th (Fri): enjoy the sand and surf at Sombrero Beach, then identify plant and animal life at The Turtle Hospital, and then kick back and relax at Bahia Honda State Park. Here are some ideas for day two: look for all kinds of wild species at Dolphin Research Center and then see what you can catch with a fishing tour.

To see ratings, other places to visit, photos, and more tourist information, you can read our Marathon trip planner .

Cardiff, UK to Marathon is an approximately 16-hour combination of train, flight, and shuttle. You can also do a combination of flight and shuttle; or do a combination of train, flight, and bus. The time zone difference moving from Greenwich Mean Time (GMT) to Eastern Standard Time (EST) is minus 5 hours. Expect much hotter temperatures when traveling from Cardiff in September; daily highs in Marathon reach 38°C and lows reach 30°C. Wrap up your sightseeing on the 7th (Sat) to allow time to take a bus to Key West.

Located just 140 km (90 mi) from Cuba, Key West is an island only about 6.4 km (4 mi) long and 1.6 km (1 mi) wide.

Kick off your visit on the 8th (Sun): admire the majestic nature at Fort Zachary Taylor, then steep yourself in history at Truman Little White House, then see the interesting displays at The Ernest Hemingway Home and Museum, and finally brush up on your military savvy at U.S. Coast Guard Cutter Ingham Maritime Museum. Keep things going the next day: get up close to creatures of the deep with a dolphin and whale watching tour, enjoy the sea views from Key West Lighthouse and Keeper's Quarters Museum, and then view the masterpieces at 7 Artists & Friends.

To see traveler tips, other places to visit, and more tourist information, you can read our Key West trip planning tool .

Take a bus from Marathon to Key West in 1.5 hours. Alternatively, you can drive. In September, daytime highs in Key West are 36°C, while nighttime lows are 31°C. Finish your sightseeing early on the 9th (Mon) to allow enough time to travel to St. Augustine.

SAINT AUGUSTINE | PONTE VEDRA on Florida's Historic Coast The Nation's oldest city (est. Kick off your visit on the 10th (Tue): stroll through St. Augustine Beach, then enjoy the sea views from St. Augustine Lighthouse & Maritime Museum, Inc., and then sample the fine beverages at St. Augustine Distillery.

To find ratings, reviews, and tourist information, read St. Augustine tour builder .

Traveling by combination of flight and car from Key West to St. Augustine takes 6 hours. Alternatively, you can do a combination of flight and bus; or drive. Traveling from Key West in September, you can expect nighttime temperatures to be a bit cooler in St. Augustine, with lows of 26°C. Finish up your sightseeing early on the 10th (Tue) so you can go by car to Panama City Beach.

Boasting 43 km (27 mi) of white sandy beaches and plenty of sunshine, Panama City Beach is an ideal choice for a relaxing holiday.

Start off your visit on the 11th (Wed): see majestic marine mammals with a dolphin and whale watching tour, learn about winemaking at Panama City Beach Winery, and then stroll through Panama City Beach.

For photos, reviews, traveler tips, and other tourist information, read our Panama City Beach trip planner .

Traveling by car from St. Augustine to Panama City Beach takes 5.5 hours. Alternatively, you can do a combination of bus and flight; or do a combination of bus, flight, and taxi. In September in Panama City Beach, expect temperatures between 37°C during the day and 24°C at night. Finish your sightseeing early on the 11th (Wed) so you can travel to San Francisco.

San Francisco is a top holiday destination featuring scenic beauty and great ethnic and cultural diversity.

Kick off your visit on the 12th (Thu): take in the awesome beauty at Twin Peaks, then take in the views from Golden Gate Bridge, and then head off the coast to Alcatraz Island. On the 13th (Fri), you'll have a packed day of sightseeing: enjoy the sea views from Fort Point, then admire the majestic nature at Marin Headlands, and then take a peaceful walk through Muir Woods National Monument.

For more things to do, where to stay, traveler tips, and tourist information, read our San Francisco journey planner.

Traveling by flight from Panama City Beach to San Francisco takes 8.5 hours. Alternatively, you can do a combination of taxi and flight; or drive. The time zone changes from Eastern Standard Time to Pacific Standard Time, which is usually a -3 hour difference. Plan for a bit cooler temperatures traveling from Panama City Beach in September, with highs in San Francisco at 28°C and lows at 17°C. Wrap up your sightseeing on the 13th (Fri) early enough to travel to Portland.

A big city with a small-town feel, Portland is home to the country's biggest rose test garden, perched on a hill overlooking downtown.

On the 14th (Sat), see the interesting displays at Evergreen Aviation & Space Museum, then admire the verdant scenery at Willamette Valley, and then take in nature's colorful creations at International Rose Test Garden. Get ready for a full day of sightseeing on the 15th (Sun): contemplate the long history of Pittock Mansion, then look for gifts at Powell's City of Books, then take in the dramatic scenery at Multnomah Falls, and finally take in nature's colorful creations at The Grotto - National Sanctuary of Our Sorrowful Mother.

For more things to do, maps, reviews, and other tourist information, refer to the Portland tour itinerary planner.

Getting from San Francisco to Portland by flight takes about 4 hours. Other options: do a combination of train and flight; or drive. September in Portland sees daily highs of 28°C and lows of 15°C at night. Wrap up your sightseeing on the 15th (Sun) to allow time to travel to Seattle.

Nicknamed the "Emerald City" because of its abundant evergreen trees, Seattle is the cultural and business center of the Pacific Northwest, as well as a popular holiday destination.

LeMay - America's Car Museum and Chihuly Garden and Glass are good opportunities to explore the local culture. Let the collections at The Museum of Flight and Museum of Pop Culture capture your imagination. Venture out of the city with trips to Snoqualmie Falls (in Snoqualmie) and Lower Big Quilcene Trail (in Olympic National Park). Next up on the itinerary: get a taste of the local shopping with Pike Place Market, stop by Glasshouse Studio, and walk around Kerry Park.

For other places to visit, traveler tips, and more tourist information, refer to the Seattle trip planner .

You can fly from Portland to Seattle in 3 hours. Other options are to drive; or take a bus. September in Seattle sees daily highs of 26°C and lows of 15°C at night. Finish your sightseeing early on the 19th (Thu) so you can travel back home.