Understanding Airline Fare Classes
Published by FlyingWith3 min readSources checked
Airline and government rules change. Check your airline's current rules before you travel.
FlyingWith editorial team
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The booking-class letter ties your ticket to a set of rules. Read the fare rules before you pay: change fees, refunds, loyalty earning and upgrade eligibility can differ even within the same cabin.
Scope: A general explanation for any airline. Letters, fare names and loyalty earning differ by airline and program, so this guide doesn't decode specific letters. The official rule quoted is the U.S. DOT refund requirement for cancelled flights.
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Your booking includes a one-letter booking class, often called a fare class. Two passengers in the same cabin can hold different booking classes, with different prices, change and refund rules, and loyalty earning. Here's how to use that information.
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What changes by airline
- What each booking-class letter means
- What basic or light fares leave out, such as seat selection, changes or a full-size carry-on
- Whether loyalty earning depends on booking class, distance or price
- Which fares can be upgraded
General advice: applies wherever you fly
What a fare class is
A booking class is a letter an airline uses for a particular price level and set of rules within a cabin. A cabin usually has several. As the lower-priced classes on a flight sell out or are closed, the airline sells from higher-priced ones, which is one reason a fare can rise as a flight fills.
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General advice: applies wherever you fly
Reading the letters
Each airline decides which letters it uses and what they mean, and the same letter can mean different things at different airlines. Rather than guessing from the letter, read the fare rules shown before payment, or ask the airline.
Basic or "light" fares, where airlines offer them, are often separate fares with fewer inclusions, for example no seat selection, no changes, or no full-size carry-on bag. What's excluded depends on the airline and route.
General advice: applies wherever you fly
Loyalty points and upgrades
Depending on the loyalty program, what you earn can depend on the booking class, the distance flown, the ticket price, or a combination. Some fares earn less, or aren't eligible for upgrades. If that matters to you, check the program's earning and upgrade rules for the booking class before choosing between similar fares.
General advice: applies wherever you fly
Change and refund rules
Change fees, cancellation terms and refund eligibility come with the fare you buy, so two tickets in the same cabin on the same flight can have different rules. When two options look alike, compare their fare rules rather than assuming the cheaper one is the same ticket at a discount.
Official rules: United States (DOT)
When the airline cancels
Whatever fare you bought, the U.S. Department of Transportation says you're entitled to a refund if the airline cancels your flight, for any reason, and you choose not to travel or accept travel credits, vouchers or other compensation. Canada's rules are different; see the guide to flight delays, cancellations and passenger rights.
General advice: applies wherever you fly
Using this when you book
If your plans might change, compare what a fare with better change and refund terms costs against the cheapest option before you decide.
If your plans are fixed and the cheapest fare's restrictions work for you, it's usually the sensible choice: same flight, fewer inclusions.
Official sources
Rules and amounts change. Before you rely on anything marked as an official rule, check the source. These are the official pages we used.
- Refunds · U.S. Department of Transportation
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