Airline Glossary

Headwinds borrows the vocabulary of the real airline business and adds a few words of its own for playing against real people. This glossary explains both — the multiplayer terms unique to a shared world, and the operating terms behind every route decision — in plain English, with a note on why each one matters.

By the Headwinds team · Last updated October 29, 2026

World & competition

World

A single shared game — one map, one economy, one set of competing airlines — that runs for a fixed span of game-years and then ends with final standings. Every airline in a world belongs to a real player, and you can play in several separate worlds at once, one airline in each. Each world has its own rules, shown as tags on the world list — gate scarcity, restricted leasing, the crew pipeline and so on.

Season

One world's run from its first week to its last. When it ends, the season is scored: a champion, a podium, and awards such as Iron Throne for the most weeks at number one and Best Comeback for the highest finish by a re-founded airline. Every finished season is recorded on your player profile, with badges earned from your record. An airline that went bankrupt or walked away finishes unranked rather than last.

Era world

A world that starts in a real historical year and moves forward through the calendar. Aircraft go on sale and out of production on their real dates, ageing designs lose appeal with passengers, and some features (codeshares, lounge networks, onboard Wi-Fi) only appear when they did in real life. Classic worlds instead count Year 1, Year 2 and onward in a present-day setting.

Event world

A timed competition run by the Headwinds team. It sets its own pace, ends at a fixed date and time rather than after a span of game-years, and can switch on special rules — one aircraft family only, no leasing, set hub cities, domestic-only flying and the like. Joining takes a code, trophies are awarded from the final ranking, and event results stay out of your season record.

Server clock / tick

Time in Headwinds advances on the server, not on your turns. A game week passes automatically — a "tick" — whether or not you're online, so a world keeps moving while you're away. Each world sets its own pace, from one week a day to one every 15 minutes; the world list shows it in plain terms, such as how many real days a game year takes.

Debrief

The weekly report on how your airline did: what each route earned, what changed in your costs, and anything that needs your attention. If you've missed two or more weeks, a "While you were away" summary comes first and covers the whole gap. For what your rivals did, read the News tab.

Standings / leaderboard

The ranking of every airline still flying in a world, listed or private, ordered by average weekly net profit over the last 52 weeks, with ties going to the larger net assets. It's the scoreboard of the game, updating every week, and it's what decides who finishes a world on top: the best average over the final 52 weeks takes the title. The same live table shows each airline's last-week profit, net assets, passengers and flights a week and fleet size, and sorts by any of them. Bankrupt airlines drop off the table and are shown only as a count.

Average weekly net profit

The number the standings rank by: your net profit over the last 52 weeks divided by 52 (by the weeks played so far, in a world's first year). Weeks you weren't flying — because you joined late or re-founded — count as zero, so a short hot streak can't outscore a full year. Net profit here is the accounting figure: operating profit less loan interest and tax, with depreciation charged and loan repayments left out, since repaying principal isn't a cost.

Shareholder value per share (SVPS)

Your share price plus every dividend you have ever paid per share — a measure of what your airline has returned to its shareholders, shown on the Stocks tab. It was the standings metric until October 2026; worlds that ended before then keep their SVPS result.

Rival

Any other airline in your world — which means any other player. Rivals scout, adapt, and react, so reading who's around you and what they're doing is a core skill. The in-game rival views show their networks, fleets, and trajectory.

Contested route

A city pair flown by more than one airline. The passengers are divided among the competitors by fare, frequency, service, and loyalty — and because the other operators are people, a contested route is as much a negotiation or a standoff as it is a spreadsheet.

Encroachment

A rival moving into a market you already serve. Demand splits, fares come under pressure, and you choose whether to defend the route, out-schedule the newcomer, or redeploy elsewhere.

Territory

The markets and hubs where you're established and unopposed. In a shared world, open territory is a finite resource — claiming profitable space before rivals do is one of the strongest opening strategies.

Alliance

A player-founded, player-run partnership of up to eight airlines. The founder approves who joins, members pay weekly dues, and in return they feed each other connecting traffic, get a demand boost where partners also fly, and have a shared chat board. In gate-scarcity worlds, members can also share their spare gate slots. Alliances extend your reach into markets you don't fly, in exchange for cooperating with partners instead of competing with them.

Gate auction / Gate Market

How gates change hands in gate-scarcity worlds, where every airport has a fixed number of gates. When an airport is at least 95% full at week 40, new gates are offered in a sealed-bid auction that settles at the new year. The Gate Market is where players sell gates to each other, and where a bankrupt airline's gates are sold off. Gates left unused for 24 weeks are forfeited.

Diplomacy / messaging

Headwinds' direct messages and alliance chat, where deals, truces, and rivalries between players play out. Messages sent from a player's profile belong to your account, so they reach you whichever world you're in. The game doesn't enforce agreements, so a promise holds only as long as both sides want it to — which makes trust its own kind of strategy.

Network & operations

Route

A scheduled service between two airports, and the basic unit you build an airline from. Each route carries its own demand, competition, fare, and cost, and each stands or falls on its own — your network is just the routes you choose to fly.

Hub

The airport your network is organised around, where routes gather so passengers can connect from many origins to many destinations. A good hub fills seats you couldn't fill point-to-point and lowers per-flight overhead, but concentrating there also concentrates your risk — and your rivals know where to attack you.

Spoke

A smaller city linked to a hub that feeds traffic inward for onward connections. Spokes are how a hub reaches markets too thin to serve nonstop.

Point-to-point

Flying passengers directly between two cities instead of routing them through a hub. It sidesteps connection hassle but only works where the two cities generate enough direct traffic to fill an aircraft on their own.

Gate & slot

You need a gate at both ends of every route, and each gate gives you 50 weekly departure slots at that airport, shared between your passenger and freight flights. Run out of slots and you can't add a flight until you lease another gate. In gate-scarcity worlds airports have a fixed number of gates, so at a busy hub your rivals are competing for the same limited capacity.

Load factor

The share of your seats that actually sell. It's the quickest read on a route's health: consistently high means your fare and capacity fit the demand, while stubbornly low means too many seats, too high a fare, or a market that isn't there — often the first sign a rival has moved in.

Frequency

How often you fly a route — one departure a day versus several. More frequency makes a route more attractive, especially to flexible travellers, and can win share from a rival, but the demand has to be there to fill the extra seats. There's no fixed cap: frequency is limited by your aircraft's weekly flying hours and your gate slots.

Turnaround

The ground time between an aircraft arriving and departing again — unloading, cleaning, boarding. Quick, dependable turnarounds keep your most expensive assets earning instead of parked.

Block time

The full gate-to-gate duration of a flight, taxi included. It governs how many rotations an aircraft can fly in a day and feeds straight into crew and cost planning.

Codeshare

A bilateral deal with another airline outside your alliance: you offer it, and it only starts when they accept. Both sides then pay a weekly fee and earn interline revenue from each other's network, widening the destinations you can sell without adding aircraft. You can hold up to six, and cancelling ends the deal for both airlines.

Fleet & equipment

Fleet

Every aircraft your airline operates. The fleet should follow the route map rather than lead it — the winning mix matches each aircraft's size and range to the missions you actually fly.

Narrowbody

A single-aisle jet seating roughly 120–230. Narrowbodies are the backbone of most profitable airlines, striking the best balance of seat count and cost on busy short- and medium-haul routes.

Widebody

A twin-aisle jet built for distance and volume. It carries far more passengers and cargo but costs more per flight, so it only pays on dense or long routes that can keep a big cabin full.

Regional jet / turboprop

Small jets and propeller aircraft for short, thin markets. They open cities too small for a mainline jet and feed a hub, trading a higher cost per seat for a lower cost per flight.

Range

How far an aircraft can fly with its typical cabin. Pack in more seats and the range shrinks; fly a lighter cabin and it stretches further. Too little and you can't serve the market; too much and you've paid for capability you never use. Match range to the mission.

Capacity

How many seats an aircraft offers. Capacity has to meet demand: oversupply a thin route and load factor sags, undersupply a busy one and you leave revenue on the table — or hand it to a rival.

Lease vs. purchase

The two ways to add an aircraft. Leasing spreads the cost and preserves cash for expansion, which usually suits the early game and any market you might contest and abandon; buying ties up capital up front but lowers long-run cost on routes you're sure of. In worlds with restricted leasing, lessors only carry single-deck, previous-generation types and cap how many leased aircraft you can have on order.

Production line

A world rule, on by default in new worlds, under which each aircraft family comes off one factory line shared by every airline in the world, building a set number of frames a week. Your own deliveries from a line are spaced one to five weeks apart by size, the earliest slots cost up to 25% extra, and cancelling a purchase forfeits 5–30% of its price, more the closer its slot. In historical worlds new types are announced two years before they enter service, and launch customers can order first, on firm terms.

Utilisation

The hours a day your aircraft actually spend flying. Idle metal still costs money, so high utilisation — through tight scheduling and fast turnarounds — is one of the clearest levers on profit.

Maintenance

The upkeep that keeps aircraft airworthy, and an unavoidable operating cost. Older aircraft cost more to run, and every aircraft goes into the shop for heavy C and D checks, earning nothing while it's there. A jet base certified for an aircraft family makes that family's checks and repairs cheaper and faster.

Fleet commonality

The savings from running fewer aircraft families that share crews, parts, and procedures. Each family you fly carries its own weekly maintenance base cost, and each family beyond the first adds to your pilot and maintenance staff costs. Variants within a family, such as a 737-800 and a 737 MAX 8, count as one.

Crew pipeline

A world rule under which staff are recruited and trained rather than appearing on demand. Each group has its own training time and cost. How fast recruits arrive depends on your pay against the going rate, which rival airlines set by what they pay. Fall 15% or more short of pilots or cabin crew and aircraft are parked until the crew arrive.

Commercial & pricing

Fare

The price of a seat, and your main lever on a route. Set it too high and load factor collapses; too low and you fill the cabin without covering costs. On contested routes the right fare also depends on what your rival is charging, and a second and third carrier on a pair each pull down the fare travellers expect.

Fare cliff

In worlds with New World Restrictions, the point above the reference fare where demand starts falling away steeply. It sits between 10% and 25% above reference, higher for better-rated routes, and applies to every cabin. The fare editor flags any fare past it and shows where it starts on that route.

Yield

Average revenue per passenger per kilometre — a measure of how richly you're pricing, separate from how full your planes are. A route can run high load at low yield (cheap seats) or low load at high yield (a few premium fares).

Demand

How many people want to fly a route at a given price. Demand caps what a route can earn, and in a contested market it's shared among the airlines flying it — reading it correctly is the heart of route planning.

Market share

Your slice of the passengers on a route or in a market, versus specific rivals. When a player encroaches, you fight for share through fare, frequency, and service — and holding your best markets often beats chasing new ones.

Loyalty program

A frequent-flyer scheme that rewards repeat passengers so they keep choosing you. It's a slow-building, multi-year investment, but a mature program is a moat a late-arriving rival can't quickly copy — and it steadies your load factors against price competition.

Reputation / brand

How well travellers know your airline and what they think of it. A new airline reaches only part of its market, and on a contested route the rest goes to better-known rivals. Marketing builds awareness, and reliable operations build reputation. Once your planes are full, a strong brand lets you hold higher fares without emptying them. In a shared world, a hard-won reputation is another edge rivals can't buy overnight.

Cargo / freight

Revenue from carrying goods rather than people, in a passenger aircraft's hold or on a dedicated freighter. Cargo can lift a marginal route into profit and smooth the swings in passenger demand. It's contested too: rival freighters on the same lane split the tonnage.

Finance & standings

Cash

Your liquid money — your runway. It covers leases, fuel, and staff while routes mature, and in a live world it's also your defence: a deep cushion is what lets you weather a rival's price war or an unattended bad stretch while the clock rolls on.

Net assets

What the airline owns less what it owes, as the Balance Sheet shows it: cash, owned aircraft at book value, shares held in rivals, lease deposits sitting with lessors and aircraft paid for but not yet delivered, minus loans outstanding. It's a standings column and the tie-break when two airlines' average profit is equal.

Operating cost

The recurring cost of flying — fuel, crew, maintenance, leases, fees, and overhead. A route only earns its place when revenue clears operating cost with margin to spare.

Route profit

Revenue minus operating cost for one route, and where most real decisions live. A network of many small, steady winners beats one showy route that loses money every rotation.

CASK (cost per available seat-kilometre)

What it costs to fly one seat one kilometre, sold or not — the standard yardstick of cost efficiency, shown on the Finance page (US airlines quote it per mile, as CASM). A lower CASK gives you room to price competitively and still profit, which matters most when a rival is trying to undercut you.

RASK (revenue per available seat-kilometre)

The revenue you earn per seat-kilometre of capacity offered (RASM, per mile, in the US). Held against CASK, it tells you at a glance whether a route or the whole airline is making money on the seats it flies — RASK above CASK means you're in the black.

Break-even load factor

The share of seats you must sell just to cover a flight's costs. Everything above it is profit, everything below is loss; lower costs or higher fares pull the break-even point down and widen your margin for error in a fight.

Debt

Borrowed money to grow faster than cash allows. Used well it funds a well-timed expansion before a rival beats you to it; used carelessly its repayments become a fixed cost that can sink you when a market turns. Lenders size what you can borrow to your recent earnings and your equity — repayments can take at most half your operating cash flow, and total debt can't pass four times equity — and aircraft finance is secured on planes you own, valued at no more than you paid for them.

Going public

Listing your airline on the world's share market by selling a slice of it — 10–35%, from week 26 — to investors, which raises cash and gives you a traded share price. It's a financing choice: private and listed airlines are ranked alike. Once listed, you can raise more with share offerings, buy shares back or pay dividends, and other players can buy up to 20% of you. Every share trade in a world is printed on the News tab.

Bankruptcy

Running out of cash and failing to meet your obligations: three missed loan payments, or six weeks in a row with negative cash. The airline is finished — its fleet goes to the used market at a distressed price — but you can re-found a new one in the same world, up to three times. Avoiding it is still the one hard rule: you can grow cautiously or boldly, but you can't run out of money.

Fuel price

The cost of jet fuel, among the largest and most variable operating costs. When it climbs, long and thin routes feel it first, and efficient aircraft and full cabins matter more than ever.