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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 · Norway

Istanbul vs Oslo: 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 Oslo compared on cost, safety, weather and size
IstanbulTurkeyOsloNorway
Daily cost, per personestimate
Budget$45$95
Mid-range$110$220
Luxury$230$470
Price level0.41× US (2025)0.91× US (2025)
US advisoryLevel 2Level 1
Best monthsJun, Jul, Aug and SepJun, Jul and Aug
Annual rain766 mm1,018 mm
Average high19.8 °C10.3 °C
Population15.7M1.1M
Time zoneEurope/IstanbulEurope/Oslo

The short answer

Istanbul is about 50 % cheaper per day than Oslo, $110 against $220 (mid-range estimate). Oslo has the lower US advisory level (1 vs 2). In September, the daily average is 23 °C in Istanbul and 13 °C in Oslo.

Keep reading

City overviews

  • Istanbul overview
  • Oslo overview

Cost and safety in detail

  • Istanbul trip cost
  • Is Istanbul safe?
  • Oslo trip cost
  • Is Oslo safe?

Where they rank

  • Cheapest cities in Europe
  • Safest cities in Europe

Countries

  • All cities in Turkey
  • All cities in Norway

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.