United States.

The United States is the third-largest country in the world with 330 million people across 50 states ranging from subtropical islands (Hawaii, southern Florida) to Arctic tundra (interior Alaska). A continent-spanning trip in 2 weeks is impossible to do well; pick one or two adjacent regions.

Variety is the country's biggest asset. A 2-week trip can be iconic cities (NYC + DC + Boston), national parks (Utah's Mighty 5, or Yellowstone + Tetons + Glacier), beach + theme parks (Florida or Hawaii), road-trip Americana (Route 66, Pacific Coast Highway), or food + music (New Orleans + Mississippi Delta, or Austin + Nashville + Memphis). No two of these share a season.

The six core regions each have their own travel calendar:

• Northeast (NYC, Boston, Philly, DC, Vermont, Maine), four-season. Best April–May and September–October. Fall foliage peaks late September in northern New England, rolling south through October.
• Southeast (Florida, Georgia, Carolinas, New Orleans), subtropical. Best November–April. Hurricane season June 1–November 30, peak mid-August through mid-October.
• Midwest (Chicago, Minneapolis, St. Louis, Detroit, Great Lakes), continental. Best June–August only. Tornado season March–June in southern Midwest plains.
• Mountain West / Rockies, high-altitude, four-season. Skiing December–April (Aspen, Vail, Park City, Jackson Hole, Big Sky). Hiking and parks June–September.
• Southwest (Arizona, Nevada, New Mexico), desert. Brutal summers (Phoenix and Vegas 115°F+), mild perfect winters. Monsoon thunderstorms July–September. Best October–May.
• West Coast (CA, OR, WA), Mediterranean to maritime. Year-round mild in coastal southern California. Pacific Northwest June–September only. Wildfire season July–October can blanket the West in smoke.
• Hawaii, tropical, year-round. Wettest November–April. Sweet spots April–May and September–October.
• Alaska, short tourism window June–August. Northern Lights September–April (the 2025–2026 Solar Maximum is the best aurora period in 11 years).

Holiday calendar. Memorial Day (last Monday May) unofficially starts summer; Labor Day (1st Monday September) ends it. July 4 is the busiest week. Thanksgiving (4th Thursday November) is the year's heaviest air-travel period; Christmas through New Year's is the second. Spring break (mid-March) drives college-kid waves to Florida and Vegas. Expect 50–100% hotel premiums during these windows.

Pick the region first, then the month.

Northeast, best April–May and September–October. NYC at its best mid-September through October and April–May. Boston same calendar plus Patriots' Day Marathon (3rd Monday April). DC's Cherry Blossom Festival peaks late March through early April. Vermont, NH, Maine at their best in fall foliage week, last week September through second week October. Acadia iconic in October. Skiing at Stowe, Killington, Sugarloaf late November through April. Avoid Northeast July–August unless beach is the goal.

Southeast, best November–April. Miami, Keys, Key West at their best December–March (but spring break in March turns South Beach into chaos). Orlando theme parks lowest crowds early February and after Labor Day through Thanksgiving. Charleston and Savannah at their best March–May and October–November. New Orleans Mardi Gras (Tuesday before Lent, February 17, 2026) is the signature event; Jazz Fest (last weekend April + first weekend May) secondary. Everglades December–March. Great Smoky Mountains at its best mid-October for foliage, the country's most-visited park.

Midwest, best June–August. Chicago summer-only for most travelers, lakefront, Lollapalooza (early August), beer gardens, baseball. Mackinac Island peaks July–August. Great Lakes road-tripping mid-June through August.

Mountain West, June–September for parks, December–April for skiing. Yellowstone the marquee, June through early September for full road and lodge access. Grand Teton pairs with it. Glacier even more season-locked: late June through mid-September only for Going-to-the-Sun Road. Rocky Mountain NP late June to early October. Skiing in Aspen, Vail, Park City, Jackson Hole, Big Sky mid-December through early April; peak February. Sundance (Park City, late January) stacks onto ski season.

Southwest, best October through May. Phoenix, Tucson, Sedona at their best November–March. Las Vegas most pleasant October–April; July–August 110°F+. Grand Canyon South Rim year-round, North Rim mid-May through mid-October only. Zion and Bryce at their best March–May and September–November. Joshua Tree October–May. Death Valley November–March only, summer 120°F+ and dangerous.

West Coast, varies by latitude. LA, San Diego, Palm Springs year-round. San Francisco's sunniest months are September and October (summer fog lifts). Pacific Northwest is June through September only. Wildfire season July–October can blanket the West in smoke for weeks.

Hawaii, year-round, with sweet spots. Wettest November–April, driest May–October. Whale watching peaks December–April off Maui and the Big Island. Surf biggest on North Shores December–February. Sweet spots: late April–early June, and September–mid-October.

Alaska, June–August for cruise/land, September–April for Northern Lights. Inside Passage cruises mid-May through mid-September. Denali open mid-May through mid-September. Aurora peak December–March; the 2025–2026 Solar Maximum is the best aurora period in over a decade.

The NPS manages 63 national parks. The marquee parks each have a narrow window:

Yellowstone (WY/MT/ID), June through early September for full road and lodge access. Wildlife active spring and the September rut. Wolves best at dawn/dusk April–May and September–October. Most of the park closed to cars November–April (winter snowcoach only). Lodges book 9–13 months ahead.

Grand Teton (WY) pairs with Yellowstone. Cottonwoods turn gold late September.

Yosemite (CA), April–June for waterfalls (snowmelt peak). Summer crowded but dependable; Tioga Road open. Fall colors September–October. Winter has snow on Half Dome, Badger Pass skiing.

Zion and Bryce (UT), March–May and September–November. Summer hot (95–105°F) with flash-flood risk in Zion's narrows. Winter at Bryce with snow on the hoodoos is photogenic and almost empty.

Glacier (MT), late June through mid-September only for Going-to-the-Sun Road. Reservations required for popular sections. Wildflowers peak July.

Rocky Mountain NP (CO), late June through early October.

Grand Canyon (AZ), South Rim year-round; North Rim May 15–October 15 only. Best: April–May and September–October.

Acadia (Maine), late June through October. October iconic along Cadillac Mountain.

Great Smoky Mountains (TN/NC), the country's most-visited park (12 million annual visitors). October for foliage peak; spring wildflowers (April–May) secondary.

Everglades (FL), December–March (dry season). Better wildlife, no mosquitoes.

Joshua Tree (CA), October–May. Summer brutal (105°F+).

Death Valley (CA/NV), November–March only. Summer 120°F+ and dangerous.

Olympic, Mount Rainier, North Cascades, Crater Lake (Pacific NW), July–September. Rest of year wet and snow-locked.

Denali (AK), June–August only. Denali Park Road has been partially closed by the Pretty Rocks landslide and may not fully reopen until 2027, check nps.gov/dena.

Hawaii Volcanoes and Haleakala, year-round; volcanic activity unpredictable.

Reservations: many popular parks now require timed-entry permits during peak season, Glacier, Rocky Mountain, Acadia, Yosemite (some entrances), Arches, book at recreation.gov 90 days ahead. The America the Beautiful Pass ($80) covers all parks for one year, pays off if visiting 3+ parks. Most parks: $30–35 entry per vehicle for 7 days.

Visa. 41 Visa Waiver Program countries, UK, EU, Japan, Korea, Singapore, Australia, NZ, etc., qualify for ESTA. Apply at esta.cbp.dhs.gov, $21, valid 2 years, 90-day stays. Apply at least 72 hours before travel. Have return/onward ticket and accommodation address, CBP asks. Non-VWP nationals need a B1/B2 tourist visa (~$185, weeks-to-months wait). CBP entry inspection can be intense, be polite, don't joke about anything sensitive. Overstays are taken seriously, even minor ones result in multi-year bans.

Currency: USD. Card payments universal; Apple Pay/Google Pay everywhere. Sales tax NOT included in posted prices, 0% (OR, MT, NH, DE) to 10%+ in some cities. Hotel taxes add 10–17%.

Tipping is structural and mandatory: Restaurants 18% minimum, 20% standard, 22–25% excellent in major coastal cities (servers paid below minimum wage; not tipping is treated as wage theft). Bartenders $1–2/drink, $2–3 cocktails. Taxis/Ubers 15–20%. Hotel housekeeping $5–10/day in the room. Bellhop $2–5/bag. Tour guides, hair/nails/spa 18–20%. Counter-service tip-screen creep: tip what feels reasonable.

Daily budget for 2026 (USD): Backpacker / coastal cities (NYC, LA, SF, Boston): $120–180/day. Backpacker / mid-tier cities (Chicago, Phoenix, Atlanta, Vegas): $80–130/day. Mid-range / 3-star in major cities: $300–500/day per couple. Comfort / 4-star: $700–1,500+/day per couple. National parks and rural: $120–250/day.

For two adults, 14 days, mid-range, focused 1–2 region trip: budget $5,500–9,000 on the ground, plus international flights ($800–1,500/person from Europe; $400–900 from Asia).

Restaurants by tier: fast food $10–15; casual $20–35/main; mid-tier $40–70; upscale $80–250; NYC/SF top tier $400–700/person tasting menus.

Transport. Domestic flights cheapest on Southwest, Frontier, Spirit, Allegiant, Breeze (watch the fees); standard on Delta, American, United, Alaska, JetBlue, Hawaiian. Book 6–8 weeks ahead, Tuesday–Wednesday cheapest. Amtrak limited but iconic, Coast Starlight (LA–Seattle), Empire Builder (Chicago–Seattle), Acela (Boston–DC), California Zephyr (Chicago–SF). Rental cars essential outside dense city cores ($40–100/day; insurance meaningful, decline only if credit card or home auto covers). Urban transit: NYC subway excellent; Boston, DC, Chicago, SF BART, Philly functional; most other cities (LA, Houston, Phoenix, Atlanta, Miami) require a car. Uber/Lyft universal. Tolls heavy in Northeast (NJ Turnpike, PA Turnpike, FL).

Plug: Type A/B, 110V, same as Canada.

Safety: tourist areas in major cities generally safe in daytime. Research neighborhoods before booking (Tenderloin in SF, parts of South/West Chicago, parts of South LA). Highest gun ownership in the developed world; mass shootings make headlines but are statistically rare per individual day. Avoid altercations in unfamiliar bars or after drinking. Highway fatigue on long drives is real. Wildlife in parks: bear-proof food storage in Yellowstone/Glacier/Smoky/Yosemite; rattlesnakes in Southwest; alligators in FL/LA; don't approach bison.

Health: tap water safe in nearly all areas. No tropical diseases, no malaria. Lyme disease in Northeast and northern Midwest, check for ticks. Sunburn at altitude in Rockies, Tahoe, Grand Canyon. Healthcare expensive, travel insurance essential. ER visit $5,000–15,000+ uninsured; hospital stay $50,000+.