New figures show there has been a sharp rise in the number of Londoners spending a significant portion of their day getting to and from work.
In the capital, nearly 800,000 people spend two or more hours commuting to work - a 68% increase over the past decade.
There has also been a 54% increase in the number of Londoners spending three or more hours getting to and from work each day.
The analysis of Office of National Statistics figures has been released by the Trade Union Congress (TUC), which is calling on employers to help address the issue.
The figures have been released to coincide with the start of Commute Smart Week, which is organised by Work Wise UK.
Across the whole of the UK, the analysis shows the biggest increase is among female workers.
Over the past decade, there has been a 90% increase in the number of women spending more than two hours a day getting to work.
Despite the increase, men still spend longer on average getting to work. The latest figures show men spend an average of 61.8 minutes commuting per day, while women spend 50.8 minutes.