Phil Hardy says it is "the film that marked the beginning of the space opera subgenre of science fiction," but notes that Denmark did not make another science fiction film until Reptilicus in 1961.

[1] Scientists build an airship called the Excelsior, and travel to Mars.

The captain falls in love with Marya, the daughter of Mars' philosopher-king, and she must get her father's blessing before they return to Earth and get married.

Critic Jörg Hartmann observes, "The humanoid Martian woman may still play the role of a coveted object, but it is her own independent decision to leave her home planet to spread a Martian message of peace through her love affair with the human captain.

"[2] Similarly, Matthew Coniam writes, "A Trip to Mars was produced at a time when the First World War was showing little sign of ending, and in this respect the film cannot fail to impress when seen as a plea for compassion and tolerance, featuring as it does perhaps the least antagonistic meeting of Martians and Earthlings in screen history.