Navan - Business Travel Solutions & Expense Management

Ancillary Services

Optional add-on products and fees that airlines sell separately from the base fare, including checked baggage, seat selection, priority boarding, onboard meals, and schedule flexibility, which collectively generate over $157 billion annually for the global airline industry.

Victoria Landsmann

•June 11, 2026•

5 minute read

What Are Ancillary Services?

Ancillary services are optional products and fees that airlines sell in addition to the base airfare. They include physical products (checked bags, onboard meals, extra legroom seats), service upgrades (priority boarding, lounge access, schedule flexibility), and third-party offerings sold through the airline's platform (hotel bookings, car rentals, travel insurance).

The term "ancillary" literally means supplementary or secondary. In aviation, it describes everything that was historically included in a standard ticket but has been unbundled into separately priced components. A basic economy fare class might include only the seat and a personal item, with every additional service available for purchase.

This unbundling accelerated after airline deregulation created intense fare competition. Rather than competing solely on base ticket price, carriers began separating services so price-sensitive travelers could buy the minimum while service-focused travelers could customize their experience. The result: lower base fares for those who don't need extras, and significant revenue from those who do.

Categories of Airline Ancillary Services

Ancillary revenue falls into three distinct categories, each with different implications for corporate travel budgets.

Category	Examples	Revenue Mechanism	Corporate Policy Relevance
A la carte products	Checked bags, seat selection, meals, Wi-Fi, priority boarding	Direct purchase by traveler	Must define which extras are reimbursable
Commission-based	Hotel bookings, car rentals, activities sold through airline	Airline earns commission from supplier	May bypass corporate preferred suppliers
Loyalty programs	Frequent flyer miles sold to credit card partners	Airline sells points/miles to financial institutions	Affects employee loyalty program participation

Baggage fees remain the single largest a la carte revenue source globally, but seat selection fees have grown rapidly and now rival baggage at many carriers. Wi-Fi and onboard connectivity represent the fastest-growing category as business travelers increasingly treat connectivity as essential rather than optional.

How Ancillary Services Affect Corporate Travel Budgets

The unbundled pricing model creates three specific challenges for travel managers.

Hidden trip cost. A flight that appears to cost $400 may actually cost $500-600 once a checked bag ($35-70 each way), seat selection ($15-50), and Wi-Fi ($10-25) are added. If policy only tracks base fare, the actual cost of business travel is systematically understated in reporting.

Policy gray zones. Which ancillary services are legitimate business expenses? Checked baggage for a week-long trip is clearly reimbursable. But what about an extra-legroom seat on a 90-minute domestic flight? Priority boarding? Onboard premium snacks? Without explicit guidance, employees make inconsistent decisions and finance teams spend time adjudicating disputes.

Booking fragmentation. Travelers may book their flight through the corporate booking tool but purchase ancillaries directly through the airline's app or at the airport. These purchases bypass corporate tracking systems entirely, creating expense reconciliation gaps that surface only when employees submit receipts weeks later.

How to Build Ancillary Services into Travel Policy

Effective policies address ancillaries explicitly rather than leaving them to individual judgment.

Define reimbursable ancillaries by flight duration. A common framework: checked baggage always reimbursable; seat selection reimbursable on flights over 4 hours; Wi-Fi reimbursable on flights over 2 hours when working; premium meals reimbursable on international flights only. This creates clear rules while acknowledging that needs vary by trip type.

Set per-trip ancillary budgets. Rather than approving or rejecting individual items, some companies allocate a fixed ancillary budget per trip (e.g., $75 domestic, $150 international). Travelers choose how to spend it without needing line-item approval.

Capture ancillaries in the booking flow. When travelers add services during initial booking through a managed platform, the costs are automatically categorized and policy-checked. When they add services later through the airline directly, those costs become harder to track and control.

Transform Your T&E Management with Navan

Make business travel work for everyone.

Get started

The Growth of Ancillary Revenue in Aviation

Ancillary services have transformed from a marginal revenue source to a core component of airline economics. IdeaWorksCompany data shows ancillary revenue grew from $67.4 billion globally in 2016 to $157 billion in 2025, a 133% increase in under a decade [1]. The share of total revenue attributable to ancillaries rose from 9.1% to 15.7% over the same period.

For corporate travel programs, this shift means that base fare comparisons between carriers are increasingly misleading. A carrier with a $50 lower base fare but higher ancillary fees for services the traveler will definitely use (checked bag, seat selection) may actually cost more all-in. Total trip cost comparison must include expected ancillary spend.

The trend shows no sign of reversing. As distribution technology improves and airlines can offer more personalized ancillary bundles at the point of booking, the range of purchasable extras continues to expand. Airport lounge day passes, gate upgrades, companion seat blocking, and real-time upgrade auctions represent newer ancillary categories that further blur the line between base fare and total trip cost.

When Should Business Travelers Skip Ancillary Purchases?

Not every ancillary service delivers value proportional to its cost.

Short domestic flights. On flights under 2 hours, paid seat selection rarely justifies the cost for an able-bodied traveler unless window/aisle preference is essential for working. The time in the seat is too brief for positioning to meaningfully affect productivity.

Carry-on sufficient trips. For 1-2 night business trips, a carry-on bag typically suffices. Paying for checked baggage adds cost and introduces a 15-30 minute delay at baggage claim that extends total travel time.

Redundant connectivity. On flights with free messaging (increasingly common), paying for full Wi-Fi access is unnecessary unless the traveler needs to access large files or join video calls. Free messaging handles most urgent business communication.

Status-provided services. Frequent business travelers often have airline status that includes complimentary checked bags, priority boarding, and seat selection. Paying for services already included through loyalty status is a pure waste that policies should explicitly prevent.

Seat Assignment: The process of selecting a specific seat on an aircraft, which has evolved from a free service to one of the most common ancillary revenue sources as airlines charge for preferred positions.
Fare Class: The booking category that determines which ancillary services are included in the ticket versus sold separately, with basic economy classes typically bundling the fewest complimentary extras.
Priority Boarding: An ancillary service allowing passengers to board the aircraft before general boarding groups, valued by business travelers who need overhead bin space for carry-on luggage.