The report found that treatment was not being made available to many patients requiring chemotherapy and surgery due to staff shortages.
Lung cancer kills about 34,000 people a year - more than breast, prostate, bladder and leukaemia versions of the disease combined.
The report says in some parts of the UK, as few as 10% of patients are receiving any form of treatment and nationally the figure is only 51%.
The coalition estimates that in order to save an extra 3,000 lives a year, the treatment figure should be closer to 70%, taking into account the fact that further treatment is not advisable for certain patients due to the advanced nature of their cancer.
One of the major problems is that there are only 44 full-time surgeon positions for more than 240 separate teams, meaning some patients eligible for treatment are being turned down.
Dame Gill Oliver, chairman of the coalition, says: "We are still letting lung cancer patients down.
"Our review shows there are still huge variations and vast inequalities in care across the country.
"We believe that whatever the cause of their disease, patients deserve the best care and support."
Five-year lung cancer survival rates are still below 9% in the UK, compared with 12.3% across Europe on average.
The coalition believes survival rates can be doubled by 2020 if more money is invested in diagnostic equipment and the workforce as well as encouraging GPs to refer at-risk patients for earlier tests.
A Department of Health spokesman said: "We know there is more to do on lung cancer. That is why we recently re-convened the Lung Cancer and Mesothelioma Advisory Group to look at many of the issues raised in this review, including access to surgery."