San Juan vs London: Which Is Safer for Travelers?
Both cities score -1/100 overall. The category breakdown is where they differ.
Category-by-category breakdown
Lower scores are safer. The "winner" column is whichever city scores lower in that category.
| Category | San Juan | London | Lower (safer) |
|---|---|---|---|
|
Crime
Petty theft, violent crime, scams targeting tourists
|
0 | 32 | San Juan (by 32 points) |
|
Health
Disease outbreaks, water/food safety, mosquito-borne disease
|
0 | 15 | San Juan (by 15 points) |
|
Advisory
Government travel advisory tier
|
0 | 12 | San Juan (by 12 points) |
|
Political
Civil unrest, protests, instability
|
0 | 18 | San Juan (by 18 points) |
|
Disaster
Earthquakes, cyclones, floods, volcanoes
|
0 | 12 | San Juan (by 12 points) |
|
Transport
Road traffic, public transit, route hazards
|
0 | 18 | San Juan (by 18 points) |
|
Environmental
Air quality, water, heat, altitude
|
0 | 30 | San Juan (by 30 points) |
|
Digital security
Card skimming, public Wi-Fi, surveillance
|
0 | 28 | San Juan (by 28 points) |
|
Money safety
Counterfeit currency, taxi scams, exchange fraud
|
0 | 15 | San Juan (by 15 points) |
Who each city may be better for
San Juan may suit travelers focused on:
- Crime (score 0/100) — Petty theft, violent crime, scams targeting tourists
- Health (score 0/100) — Disease outbreaks, water/food safety, mosquito-borne disease
- Advisory (score 0/100) — Government travel advisory tier
London may suit travelers focused on:
- Advisory (score 12/100) — Government travel advisory tier
- Disaster (score 12/100) — Earthquakes, cyclones, floods, volcanoes
- Health (score 15/100) — Disease outbreaks, water/food safety, mosquito-borne disease
These are baseline observations from category scores, not personalized recommendations. Run a real assessment for either destination to get a briefing tailored to your specific trip.
Frequently asked questions
Is San Juan safer than London?
Both cities score -1/100 overall — essentially equal. The decision should come down to category-specific factors and your personal trip needs.
What is the biggest safety difference between San Juan and London?
The largest gap is in Crime: San Juan scores 0/100 and London scores 32/100. San Juan is materially safer in this category.
Should I trust a single composite score?
No. Always look at the category breakdown. Two cities can have the same composite but very different category profiles — one driven by petty crime, the other by natural disaster risk. The composite is useful as a shortlist filter; the category scores are useful as a planning tool. See our guide to travel risk scores for more.
How current is this comparison?
Baseline scores are reviewed at least every 90 days. Run a personalized assessment for either city to add live data (current weather, today's advisories, recent news, disaster alerts) on top of the baseline.
Methodology & disclaimer
This comparison uses our 12-category weighted scoring with category baselines from a mix of curated editorial signals (publicly available crime indices, WHO health-system data, current US State Department advisories, well-documented political and transport patterns) and live data feeds when you run a real assessment. The score is an estimate — not a substitute for your country's official travel advisory.
Full methodology · Data review process · Data sources · Report a correction
Run a personalized comparison
Live weather, advisories, news, and disaster alerts layered on top of these baselines — for both cities, with your specific traveler profile.
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Disclaimer
Travel Risk Calculator provides estimated travel-threat information for preparation purposes only. It does not replace official government advisories, medical advice, emergency alerts, immigration rules, insurance advice, police guidance, embassy information, or professional security consultation.