The airline ancillary services market encompasses a wide array of offerings, broadly categorized as follows: Baggage Fees: This remains a significant revenue stream, encompassing charges for checked baggage, oversized items, and excess weight, often differentiated by weight and size tiers. Onboard Retail & A-La-Carte Services: In-flight sales of food, beverages, Wi-Fi access, entertainment, and duty-free goods contribute significantly to ancillary revenue. Airlines are increasingly focusing on enhancing the quality and variety of these offerings to improve passenger satisfaction and profitability. Airline Retail & FFP Miles Sale: This category includes sales of branded merchandise, travel accessories, and frequent flyer miles, often leveraging airline websites, mobile apps, and partnerships with retail outlets to maximize sales opportunities. Seat Selection & Upgrades: Allowing passengers to choose their preferred seats, often at a premium, and offering upgrades to premium cabins generate considerable revenue.