The airline is citing higher costs in raising its pet fee to $95 per flight from $75 beginning with flights on Jan. 15.
Southwest Airlines Co. lets passengers bring a vaccinated dog or cat that fits in a carrier that goes under an airline seat. Pets are taken on a first-come basis, up to six per flight.
Southwest, which began carrying pets in 2009, charges less for the service than many other U.S. carriers. United, Delta, American and US Airways all charge $125 each way, while JetBlue and Alaska charge $100.
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