Luggage and Baggage Services Frontier Airlines charges for both checked and carry-on luggage, so it's best to purchase your baggage allowance online to save money. At the Frontier Airlines SFO Terminal, there are clear bag drop lines and staff on hand to answer questions. In case of lost baggage, head to the Frontier Airlines baggage service office located within the terminal or con... https://terminalfinds.com/frontier-airlines-sfo-terminal/