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One page of sourced numbers per city: what a day costs, what the travel advisory says, and which months score best on the weather.

Data: GeoNames, Open-Meteo, World Bank, US State Department, UK FCDO.

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© 2026 Travel City Index. Every number on this site comes from a dataset named on the page that shows it.
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Turkey · Portugal

Istanbul vs Lisbon: cost, safety and weather compared (2026)

Every figure below comes from the same datasets for both cities, so the two columns are comparable.

Istanbul and Lisbon compared on cost, safety, weather and size
IstanbulTurkeyLisbonPortugal
Daily cost, per personestimate
Budget$45$55
Mid-range$110$135
Luxury$230$285
Price level0.41× US (2025)0.60× US (2025)
US advisoryLevel 2Level 1
Best monthsJun, Jul, Aug and SepMay, Jun, Jul and Aug
Annual rain766 mm678 mm
Average high19.8 °C22.1 °C
Population15.7M518K
Time zoneEurope/IstanbulEurope/Lisbon

The short answer

Istanbul is about 19 % cheaper per day than Lisbon, $110 against $135 (mid-range estimate). Lisbon has the lower US advisory level (1 vs 2). In September, the daily average is 23 °C in Istanbul and 22 °C in Lisbon.

Keep reading

City overviews

  • Istanbul overview
  • Lisbon overview

Cost and safety in detail

  • Istanbul trip cost
  • Is Istanbul safe?
  • Lisbon trip cost
  • Is Lisbon safe?

Where they rank

  • Cheapest cities in Europe
  • Safest cities in Europe

Countries

  • All cities in Turkey
  • All cities in Portugal

Sources

  • GeoNames city database — CC BY 4.0, fetched September 14, 2026
  • Open-Meteo climate archive — CC BY 4.0, fetched September 21, 2026
  • World Bank price level and exchange rate — CC BY 4.0, data year 2025
  • US State Department travel advisories — public domain, fetched September 21, 2026

Dates are the most recent fetch across the cities on this page. Every sentence here is generated from the data by rule, with no AI writing; the formulas are public.