Quick Verdict
Pick Key West if Mallory Square sunsets, Hemingway-house tours, and Duval Street conch fritters outweigh urban depth. Pick Mexico City if Templo Mayor mornings, Roma Norte tacos al pastor, and Pujol tasting nights beat island vibes.
🏆 Mexico City wins 79 OVR vs 74 · attribute matchup 5–5
Key West
United States
Mexico City
Mexico
Key West
Mexico City
How do Key West and Mexico City compare?
Key West and Mexico City both come up on the same Latin-flavored short-flight searches from the East Coast, but they barely share a postcard. Key West is the southernmost mile of the US — Mallory Square's nightly sunset celebration with jugglers and conch fritters, Hemingway's six-toed cats on Whitehead Street, and the salt-and-coconut-rum drift down Duval Street at 1 AM. Mexico City is a 7,300-foot megacity with Diego Rivera murals at Palacio Nacional, Templo Mayor's Aztec foundations exposed mid-Zócalo, and tlayuda smoke off Roma Norte griddles after dark.
The cost gap is dramatic: $350 mid-range in Key West (a Conch Republic island carries Caribbean-resort pricing) versus $115 in Mexico City. A Pepe's Café breakfast hits $30 a head; a Pujol tasting menu — one of the world's 50-best restaurants — clears $200 but el Tizoncito al pastor tacos are $1.50 each. Key West wins on beach proximity (the only US destination where you swim off downtown), on the laid-back Conch Republic feel, and on US familiarity. Mexico City wins on food density, museums (Anthropology Museum is a full day), and value — your week stretches three times further.
Time Key West December–April for dry-season sun; Mexico City is best March–May or October–November. Both are 90 minutes nonstop from Miami, so a Florida-Yucatán-CDMX 10-day combo works. Pick Key West if Mallory Square sunsets, Hemingway-house tours, and conch-fritter walking trump city size. Pick Mexico City if Templo Mayor mornings, Roma Norte taquerías, and Anthropology Museum days beat island familiarity.
💰 Budget
🛡️ Safety
Key West
Key West is generally a safe small city for tourists. Old Town is well-policed and busy; the main risks are alcohol-related incidents (Duval Street late-night), aggressive scooter rentals on busy streets, sun exposure, and the seasonal hurricane risk. Petty theft from rental scooters and unattended beach belongings does occur. The island's relaxed, party-oriented culture means common sense is your best safety tool.
Mexico City
Mexico City's tourist areas (Roma, Condesa, Polanco, Coyoacan, Centro Historico) are generally safe during the day. Petty crime like phone snatching and pickpocketing occurs. Use common sense, stay in well-traveled areas at night, and use ride-hailing apps rather than hailing random cabs.
🌤️ Weather
Key West
Key West has a tropical savanna climate moderated by surrounding water — temperatures stay narrowly between 18°C (winter low) and 32°C (summer high) all year. There is a wet season (May–October, with afternoon thunderstorms and hurricane risk) and a dry season (November–April, which is also peak tourist season). Hurricane risk is real — Hurricane Irma in 2017 caused major damage to the Lower Keys.
Mexico City
Mexico City's high altitude gives it a mild, spring-like climate year-round. There are two main seasons: dry (November-April) and rainy (May-October). Temperatures are remarkably consistent, rarely exceeding 28°C or dropping below 5°C.
🚇 Getting Around
Key West
Key West Old Town is small (about 2 miles by 4 miles total island) and the historic centre is almost entirely walkable. Bicycles are the favourite local transport — flat terrain, dedicated bike lanes, and bike racks everywhere. The Duval Loop bus is free; Uber and Lyft operate but are more expensive than in Miami. Renting a car for the week is unnecessary unless you're visiting other Keys; parking in Old Town is scarce and expensive ($4-8/hour, $25/day in city lots).
Walkability: Old Town is one of the most walkable small-city centres in America — flat, compact, shaded by tropical canopy, and full of architectural detail. The full Duval Street walk takes 25 minutes end to end. Bicycles extend the comfortable range to the entire island.
Mexico City
Mexico City has an enormous public transit network anchored by the Metro (12 lines), Metrobus (rapid transit buses), and regular buses. The Metro is incredibly cheap but crowded during rush hours. Uber and DiDi are widely used and affordable.
Walkability: Central neighborhoods like Roma, Condesa, Coyoacan, and Centro Historico are very walkable with wide sidewalks and pleasant tree-lined streets. Chapultepec and Polanco also reward walking. However, the city is vast — distances between neighborhoods often require transit. Sidewalks can be uneven, and traffic is aggressive at crossings.
📅 Best Time to Visit
Key West
Jan–Apr, Dec
Peak travel window
Mexico City
Mar–May, Oct–Nov
Peak travel window
The Verdict
Choose Key West if...
you want a quirky, walkable, southernmost-US tropical destination with Hemingway history, the Conch Republic, the best key lime pie, and a daily sunset ritual
Choose Mexico City if...
you want Latin America's biggest food scene — Zócalo, Frida Kahlo, Teotihuacán pyramids, mezcal bars, and Xochimilco trajineras
Key West
Mexico City
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