The Centers for Disease Control and Prevention this week recommended that pregnant woman avoid traveling to a Miami neighborhood where several Zika infections have been confirmed.

"This information suggests that there is a risk of continued active transmission of Zika virus in that area," according to the CDC. The Florida Department of Health said the area of active transmission is one square mile in Miami-Dade County.

Atlanta-based Delta Air Lines earlier this year issued a Zika virus travel advisory. It notes that customers with flight reservations who are concerned about traveling to areas affected by Zika can call Delta's reservations office. Those customers may qualify for a change to an alternate destination, or a change to a different travel date or a refund.

Although the travel advisory on Delta’s website said customers could make changes for tickets issued before March 1, Delta spokesman Morgan Durrant said any customers who are concerned can still call to discuss options.

Southwest Airlines, the second-largest carrier at Hartsfield-Jackson International Airport, said it is “actively monitoring the Zika virus developments and evaluating information provided by the CDC to ensure we are following the established guidelines for the safety of our customers and employees.” Southwest’s regular policy allows customers to change any flight without a change fee and to apply the fare toward future travel, as long as the reservation is cancelled at least 10 minutes before a scheduled departure.

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