Reference

Glossary

37 terms, in plain English, in the order you are likely to meet them when reading airline sites and forums.

Avios: The points currency shared by British Airways, Qatar Airways, Iberia, Finnair and Aer Lingus. Avios move between these programs free of charge, so you can buy or earn in one and redeem in another.
Award: A ticket paid with points or miles instead of cash. Taxes and fees are still paid in cash.
Award chart: A program's fixed price list for awards by region or distance. Many programs have replaced charts with dynamic pricing that tracks the cash fare.

Bid upgrade: An auction run by the airline a few days before departure. Economy or premium economy passengers offer an amount; the highest bids fill unsold business seats. You pay only if you win.
Booking class (fare bucket): A letter code (J, C, D, Z, I for business; Y, B, M, H, Q, O for economy) that sets the fare, the rules and what the ticket earns. Each class has its own quota of seats.

Cents per point (cpp): The value you get from a redemption: (cash fare minus award taxes) divided by points, times 100. Above 1.5 is good for business class; above 2.5 is excellent.
Consolidator: An accredited agency selling airline-contracted wholesale fares not shown publicly. Real savings are 10 to 25 percent on US-origin long-haul, near zero against sale fares elsewhere.

Devaluation: A program raising award prices or adding restrictions, usually with little notice. 2026 saw devaluations at Aeroplan, LifeMiles, Flying Blue, Emirates, Cathay and others.
Dynamic pricing: Award prices that rise and fall with demand and the cash fare, instead of following a fixed chart. United, Delta, Air Canada (own flights), Flying Blue and Etihad use it.

Error fare (mistake fare): A fare filed wrongly: a missing surcharge, a currency slip, a dropped zero. Lasts hours. Airlines may cancel it, and in most jurisdictions are allowed to if they refund you.
EU261 / UK261: The European and UK regulations that set compensation (up to 600 EUR or 520 GBP) and care for cancellations, long delays and downgrades.

Fuel surcharge (YQ/YR): A carrier-imposed charge added to award taxes. Large on British Airways, Lufthansa Group, Emirates and Virgin Atlantic; zero or near zero on Aeroplan, Avianca LifeMiles and American partner awards.

Hidden-city ticketing: Buying A to B to C and getting off at B because it is cheaper than A to B. Breaches the contract of carriage; not illegal for passengers in most places.
Hold: A reservation held without payment for a fixed time, so you can move points or decide. American (24 hours), Flying Blue (72 hours), Cathay (72 hours) and Miles & More (5 days) offer them.

Light fare: The discounted business fare bucket introduced by Lufthansa Group, Etihad, Air France/KLM and others in 2025 to 2026: same seat, but no seat selection, less baggage, sometimes no lounge.

Married segments: Award space released on a connecting itinerary as a unit but not on its individual legs, or the reverse. Common at Cathay, Lufthansa, American and Qatar.
Mixed cabin: A ticket with different cabins on different legs or directions: business on the overnight flight, premium economy by day. Prices as half of each round trip on most carriers.

Nested tickets: Two overlapping round trips, each half used on a different journey, so both satisfy minimum-stay rules at leisure prices. Book on different airlines; United banned the practice in its own rules in 2026.

Open-jaw: A ticket into one city and home from another. Priced as half of each round trip, allowed by most fares.
Operational upgrade (op-up): A free move to a higher cabin because the lower one is oversold. Chosen by status, then fare class, then check-in time. Not something you can buy or dress for.
Origin arbitrage: Starting a ticket in a cheaper market (Oslo, Rome, Dublin, Cairo) to buy the same flights at a lower fare, reached by a separate positioning flight.

Phantom availability: Award seats that show in a search but cannot be ticketed, because of partner restrictions, married segments, booking-window mismatches or stale data.
Point of sale (POS): The country and currency of the selling site. Fares and sales are filed per market, so the airline's local site in local currency can be cheaper. VPN tricks rarely matter; the country selector does.
Positioning flight: A separate, cheap flight to the city where your main ticket starts. Take it the day before; a missed positioning flight means a no-show on the main ticket.
Premium economy: A cabin between economy and business: wider recliner, more legroom, better meals. Typically 1.4 to 2 times economy and 30 to 50 percent of business.
Promo Rewards: Air France/KLM Flying Blue's monthly list of discounted awards (25 percent off), published on the 1st of each month.
Published fare: The standard fare shown for a route on a given date. Business class published fares are the inflated benchmark against which 'up to 80 percent off' claims are usually measured.

Redeposit: Returning points to your account after canceling an award, often for a fee.

Saver award: The cheapest, capacity-controlled award level. Standard or Anytime awards cost more but are available on more flights.
Status match / challenge: An airline granting you elite status based on status you hold elsewhere, outright or after a short challenge. Free at several US carriers, Virgin Atlantic and (unofficially) Turkish; paid at Flying Blue and others.
Stopover: A break of more than 24 hours at a connecting city on one ticket. Aeroplan charges 5,000 points; Alaska, ANA, JAL and Turkish allow them free on some awards.
Sweet spot: A redemption where the award price is far below what the cabin costs in cash, typically 2 to 5 cents per point or more.

Through-pricing: Pricing an award on origin and destination rather than per segment. Qatar prices US to Maldives via Doha as one award, cheaper than two.
Throwaway ticketing: Buying a round trip and flying only one leg because it is cheaper than a one-way. Breaches the contract of carriage. Mixed-cabin pricing is the legal alternative.
Transfer bonus: A temporary offer of extra miles (20 to 40 percent) when converting bank or hotel points to an airline program. The cheapest points most people will ever get.
Transferable points: Bank or hotel points that can be moved to several airline programs: Amex Membership Rewards, Chase Ultimate Rewards, Capital One, Citi ThankYou, Bilt, Marriott Bonvoy, and their equivalents in other countries.

Waitlist: A request for an award seat that is not currently available. Singapore Airlines and ANA clear waitlists by status a few weeks before departure.