The 21-year-old, who was traveling with her family Tuesday morning, said she felt dizzy and then fell unconscious, The Local.es reported
The woman, who was between three and four months pregnant, died at the Girona-Costa Brava airport before emergency services arrived.
Officials said the cause of death is not known.
The airport closed its 24-hour medical center a year ago due to a decline in passengers using the facility.
General Union of Workers' Secretary General of Transport Joan Muntada said he had requested information about the incident to analyze whether charges could be filed.
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