A low-cost carrier (LCC) is an airline built around keeping the cost of each seat as low as possible, then passing part of the saving to passengers as lower base fares. The savings come from operational choices: fewer aircraft types, quick turnarounds, simple cabins and a focus on selling directly to customers. What the base fare leaves out, such as bags and seat choice, is sold as an optional extra.
The core idea: a lower cost per seat
Airlines compare themselves using unit cost, usually measured as cost per available seat-kilometre. An LCC tries to push that number below its rivals’ without reducing safety, which is regulated and inspected in the same way for all operators in a given country.
Southwest Airlines, which began flying in Texas in 1971, is the model usually cited for the idea in the United States. In Europe, carriers such as Ryanair and easyJet adapted it after the market there was liberalised in the 1990s. Many other airlines around the world have followed their own versions.
The building blocks
The model is a bundle of choices that reinforce one another.
- One aircraft family. Flying a single type, or a small set, simplifies pilot training, spare parts and crew rostering.
- High aircraft utilisation. Short turnaround times at the gate, often well under an hour, mean planes spend more of the day earning money.
- Point-to-point routes. Instead of feeding passengers through a central hub, flights link two cities directly, which reduces the complexity of connections and baggage transfers.
- Secondary or lower-cost airports. Where available, these may charge lower fees than a city’s main airport, though sometimes at the price of a longer journey into town.
- Dense seating and simple cabins. More seats on the same aircraft spread cost over more passengers.
- Direct distribution. Selling through the airline’s own website and app avoids some commissions.
- Unbundled pricing. The base fare covers the seat; other items are charged separately.
Unbundled fares and ancillary revenue
Unbundling is the feature passengers notice first. Items that a traditional carrier folds into the ticket, such as a checked bag, a meal or an assigned seat, become paid options. For the airline, this has two effects: the headline fare looks lower, and the extras bring in a separate revenue stream. How that stream works across the industry is covered in the article on ancillary revenue.
For travellers, it means the cheapest fare is not always the cheapest trip. Comparing the total after the extras you actually need is the sensible test.
Ultra-low-cost versus low-cost
The terms are used loosely, but the industry often separates two groups:
- Low-cost carriers keep a low base fare but may offer more inclusions, a wider network and some premium options.
- Ultra-low-cost carriers (ULCCs) push the unbundling further, with very low base fares and charges for almost everything beyond the seat.
The boundary is not formally defined, and a carrier can move along the scale over time.
LCC versus legacy carrier
| Feature | Typical LCC | Typical legacy (network) carrier |
|---|---|---|
| Network shape | Point-to-point | Hub-and-spoke |
| Fleet | One or two types | Several types |
| Cabin | Single class | Multiple classes |
| Fare structure | Unbundled | Mostly bundled |
| Airports | Often secondary | Main hubs |
| Connections | Usually not arranged | Often with partner airlines |
| Loyalty programme | Limited or none | Extensive |
These are tendencies, not rules. Many legacy airlines now run their own low-cost subsidiaries or sell basic-economy fares that copy LCC pricing. Many LCCs have added longer routes and business-friendly options. The industry term for those in between is “hybrid”.
Strengths and weak points of the model
The strengths are cost discipline and the ability to stimulate new demand with low fares. The weak points are exposure to fuel prices, dependence on a small number of aircraft models and airports, and lower resilience when something disrupts the single-type fleet. A grounding of one aircraft model, for instance, affects an LCC with a single-model fleet more than a carrier with several.
Because LCCs run tight schedules, a delay early in the day can ripple through every later flight on the same aircraft.
Related reading
For the wider economics of how airlines earn and spend, see the blog index, where related topics are grouped.
Frequently asked questions
Are low-cost airlines less safe?
Safety standards are set by regulators and apply to all airlines licensed in a given jurisdiction. The low-cost label refers to the business model, not a lower safety requirement.
Why do low-cost carriers use smaller airports?
Smaller airports can charge lower fees and allow faster turnarounds because they have less congestion. The trade-off is that they may be farther from the city centre.
What does “unbundled” mean?
It means the ticket price covers only the flight, and services like bags or meals are sold separately. Passengers pay for what they choose, rather than a bundled fare.
Is every low-cost carrier a no-frills airline?
No. Some offer more features than others, and the gap between low-cost and traditional airlines has narrowed. Looking at what is included for your itinerary is more useful than relying on the label.