The girls were on top of the train when they fell between cars at the 111th Street station in Corona just before 11 p.m.
They had boarded at the Flushing Main St. station, and were running on the top of moving subway as it headed west, jumping between train cars, police say.
When the train came to a stop, the women lost their balance. One fell under the train and was killed.
The other sustained a head injury, including bleeding on the brain, and is intubated in critical condition at Elmhurst Hospital.
They appear to be teenagers, but police do not know their ages because they were not carrying identification. Police have also not been able to notify their families
This marks the sixth subway surfing death this year. Just last week, a 13-year-old fell to his death while subway surfing at the Forest Avenue subway station, also in Queens.
Five people were killed subway surfing last year.
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