This is Thrilling Wonder Stories for June 1950, cover by Earle Bergey. The ISFDB entry for this issue is here. I found this version of the cover at Pulp Covers. I found some interior art in the version of the magazine preserved at the Internet Archive, such as the following by Paul Orban, illustrating Raymond Z. Gallun’s story “Coffins to Mars.”
You can download and read the entire issue at the Internet Archive.
If they do arrive in Cuba that costume of hers will get her a job at the Copacabana muy rapido!