Can a Flight API add markup to airline fares?

Yes, a flight API can add markup to airline fares, but the markup is usually controlled by the travel portal or booking system rather than by the airline itself. Travel agencies can apply fixed, percentage-based, route-specific, airline-specific, cabin-specific, or customer-specific markups to the base fare returned by the API.

For example, if an airline fare is $500, a travel agency may add a $20 fixed markup or a 5% service margin before displaying the final price to the customer. Advanced systems can also apply different markup rules for B2B agents, B2C customers, corporate clients, destinations, or travel dates.

The flight API normally provides fare, tax, baggage, and availability data, while the booking platform applies business pricing rules before checkout. Markups should always follow supplier contracts, airline policies, and local pricing regulations. This flexibility helps travel companies manage commissions, profitability, and competitive pricing more effectively across different sales channels and markets.