Buenos Aires stands out as the city with the most affordable public transport, with an average ticket price of approximately 13 cents.
In contrast, Stockholm emerges as the most expensive city, charging around US$3.85 per ticket, based on a study by William Russell.
Rio de Janeiro in Brazil also ranks among the more cost-effective cities for public transit, with an average fare of 82 cents.
The study also highlights economical public transport in cities like Singapore and Hong Kong, costing about US$1.45 and US$1.55, respectively.
On the other end of the spectrum, cities like London and Vienna have ticket prices averaging US$3.41 and US$2.70, respectively.
Meanwhile, travelers in Barcelona might expect to pay around US$3.41, while in Paris and Madrid, the costs average US$2.31 and US$1.65, respectively.
Beyond costs, the report noted other attributes.
For instance, Paris scored top marks for its sustainable transport options, receiving a perfect 10 out of 10.
Additionally, New York City boasts the most subway routes globally, operating a total of 28 lines.