What is the cheapest airline?

Determining the cheapest airline isn’t as simple as pointing to one carrier and calling it the winner. Airline prices change constantly based on demand, route competition, time of year, fuel costs, and even the day of the week you book. Instead of a single “cheapest airline,” there are categories of airlines and specific routes where certain carriers regularly offer the lowest fares.

This guide breaks down how to think about “cheapest,” which airlines are often low-cost in different regions, and proven strategies to consistently find the lowest airfare for your trips.

Why There Is No Single “Cheapest Airline”

Airfares are dynamic. A carrier that’s cheap on one route can be more expensive on another. Several factors affect what you’ll actually pay:

Route and region – Some airlines dominate pricing in certain regions (e.g., Europe vs. North America vs. Asia).
Competition – Routes served by multiple low-cost carriers (LCCs) tend to be cheaper.
Season and timing – Holidays, school breaks, and high season drive prices up for all airlines.
Ancillary fees – The “cheapest airline” on the search results page may end up pricier once you add bags, seat selection, and extras.
Promotions and sales – Flash sales, promo codes, and loyalty offers can temporarily make a more premium airline the cheapest option.

Because of these variables, the better question is: which airlines are usually among the cheapest in the region I’m flying, and how do I compare real, all‑in costs?

Types of Airlines: Low-Cost vs. Full-Service

Understanding airline business models will help you interpret prices accurately.

Low-Cost Carriers (LCCs)

Low-cost carriers focus on:

Basic, no-frills service
High seat density
Point-to-point routes
Extensive à la carte fees

They often show very low base fares, but charge for extras like:

Carry-on and checked bags
Seat selection
Onboard food and drinks
Early boarding and change flexibility

Result: LCCs often have the lowest visible fare, but may not be the cheapest once you add everything you need.

Ultra-Low-Cost Carriers (ULCCs)

ULCCs push the low-cost model further:

Extremely low base fare
Aggressive fees for almost everything
Strict baggage and boarding rules

They can be the cheapest airline for travelers who truly fly with minimal baggage and don’t care about comfort or flexibility.

Full-Service (Legacy) Airlines

Full-service carriers typically include more in the ticket price:

At least one carry-on bag
Often a checked bag on international routes
Basic snacks or meals
Loyalty points and better customer support

On some routes or during sales, these airlines can actually beat LCCs once you factor in all costs.

Airlines Often Considered Among the Cheapest by Region

Availability and pricing change, but these airlines are commonly recognized as low-cost options in their markets. Always confirm current baggage policies and fees on the airline’s site before booking.

North America

Southwest Airlines (U.S.)

Often competitively priced on domestic routes.
Includes two free checked bags, which can make them effectively cheaper than rivals.
No change fees (fare difference still applies).
Not shown on many third-party search sites; you must check Southwest directly.

Spirit Airlines (U.S.)

Ultra-low base fares, especially on popular routes.
Charges for carry-on, checked bags, and many extras.
Very strict baggage rules; oversized or gate-checked bags can be expensive.

Frontier Airlines (U.S.)

Very low base fares, particularly on leisure routes.
Charges for almost everything beyond the seat itself (including many seat assignments).
Discount Den membership can offer lower fares if you fly often.

Allegiant Air (U.S.)

Focuses on smaller cities and leisure destinations.
Very low fares on limited schedules.
Heavy reliance on ancillary fees.

WestJet & Flair Airlines (Canada)

Flair is an ultra-low-cost carrier with extremely low base fares and significant fees.
WestJet has low-cost roots and can be competitive, especially when on sale.

Europe

Europe is one of the most competitive low-cost markets.

Ryanair

Frequently offers some of the lowest base fares in Europe.
Huge network with many secondary airports.
Strict baggage policies and boarding procedures; fees can quickly add up.

easyJet

Widely considered one of the cheapest major carriers in Europe.
Charges for bags and many extras, but often viewed as slightly more straightforward than some ULCCs.

Wizz Air

Strong presence in Eastern and Central Europe.
Very low base fares, heavy reliance on add-on fees.
Often cheapest for flights to/from smaller or secondary airports.

Vueling

Low-cost Spanish airline.
Competitive on routes around Spain and Western Europe.

Asia-Pacific

AirAsia

One of Asia’s largest low-cost carriers.
Very low fares within Southeast Asia and beyond.
Many add-on charges (bags, meals, seat selection).

Scoot (Singapore Airlines subsidiary)

Low-cost carrier for medium- to long-haul routes across Asia and to some other regions.
Competitive fares with basic service, add-ons for comfort.

IndiGo (India)

Major low-cost carrier in India.
Often the cheapest on domestic routes.
Simple, point-to-point model with paid extras.

Cebu Pacific (Philippines)

Known for frequent sales and low fares.
Popular for regional travel in Southeast Asia.

Jetstar (Australia, Asia)

Qantas-owned low-cost brand.
Often cheapest on certain routes in Australia and the broader Asia-Pacific region.

Latin America & Caribbean

Volaris (Mexico)

Low-cost carrier serving Mexico, U.S.–Mexico, and Central America.
Very competitive base fares with numerous additional fees.

Viva Aerobus (Mexico)

Another ultra-low-cost airline with very cheap base fares.
Strict bag rules and multiple ancillary charges.

Gol (Brazil) & Azul (Brazil)

Both offer competitive fares in Brazil.
Not always the absolute cheapest, but often among the most economical options on key routes.

Middle East & Africa

FlyDubai (UAE)

Low-cost partner of Emirates.
Often cheaper than full-service regional carriers on short to medium routes.

Air Arabia

Low-cost airline serving Middle East, North Africa, and parts of Asia and Europe.
Competitive base fares with paid extras.

Jambojet (Kenya), Fastjet (regional)

Smaller low-cost carriers offering relatively cheap regional flights, particularly within East and Southern Africa.

How to Actually Find the Cheapest Airline for Your Trip

Because prices vary by day and route, using smart search strategies matters more than memorizing a “cheapest” brand.

1. Use Flexible Search Tools

Flight search engines help you compare multiple airlines at once:

Use sites like Google Flights, Skyscanner, Kayak, Momondo, and Hopper.
Search with:
- Flexible dates (e.g., “whole month” or “cheapest month” views).
- Nearby airports to spot cheaper alternatives.

Note: Some airlines (like Southwest in the U.S. and some smaller LCCs elsewhere) may not appear. Always check those carriers’ websites separately.

2. Check Total Cost, Not Just the Base Fare

To find the true cheapest airline, calculate all-in costs:

Baggage: carry-on + checked bag fees (both directions).
Seat selection: whether you’re okay with random seating.
Payment and check-in fees: some LCCs charge for airport check-in or certain payment methods.
Airport transport: secondary airports might be far from the city center, increasing ground transport costs.

An airline that seems more expensive at first (with included bags and snacks) can become cheaper than an ultra-low-cost carrier once you tally everything.

3. Compare Different Booking Options

Airline website vs. OTAs (Online Travel Agencies like Expedia, Booking.com):
- Sometimes OTAs show cheaper bundles.
- Other times, airlines offer exclusive web-only discounts.
Watch for promo codes, newsletters, and app-only deals:
- Many low-cost airlines run frequent sales for subscribers.

4. Be Flexible With Dates and Times

If your main goal is to use the cheapest airline available:

Shift your travel dates: midweek flights (Tuesday–Thursday) often cost less than weekends.
Avoid peak travel periods: holidays, major events, and school breaks.
Fly at off-peak times: early morning, late night, or red-eye flights can be cheaper.

5. Use Fare Alerts

Set price alerts on search tools:

Get notified when prices drop on your route.
Track trends to know whether prices are rising or falling.
Book when you notice a clear dip relative to the average.

6. Consider One-Way and Mixed Airline Itineraries

Sometimes, the cheapest option is to:

Book separate one-way tickets instead of one round-trip.
Mix airlines – for example, fly out with a low-cost carrier and return with a different airline that has better pricing for that direction.

Always allow generous connection times if you build your own multi-airline itinerary, because missed connections on separate tickets usually aren’t protected.

When the “Cheapest Airline” Might Not Be the Best Choice

Choosing the cheapest carrier isn’t always the smartest decision. Consider:

Baggage Needs

If you need multiple bags:

A full-service airline with one or two free bags might be cheaper overall.
LCC baggage charges each way can exceed the base fare.

Comfort and Flight Length

For short flights, minimal legroom and fewer amenities may be tolerable. On long-haul routes:

Ultra-low-cost carriers often have:
- Tighter seat pitch
- Limited recline
- Extra charges for meals and entertainment
A slightly more expensive airline with better comfort might significantly improve the travel experience.

Change and Cancellation Flexibility

Plans change. Full-service airlines often:

Offer more flexible ticket options.
Provide better customer service in case of disruption.

Many low-cost carriers have strict policies and high change fees, which can erase any initial savings if you need to modify your trip.

On-Time Performance and Reliability

A bargain isn’t a bargain if delays or cancellations derail your plans:

Research on-time performance and customer reviews, especially for newer ULCCs.
Consider the airline’s frequency on your route; more daily flights mean more options if something goes wrong.

Practical Examples: When Different Airlines Become the Cheapest

Example 1: Domestic U.S. Trip with Bags

Option A: Ultra-low-cost carrier with a $49 fare, plus:
- $40 carry-on each way
- $30 seat selection each way
- Total before tax: $189+
Option B: Southwest or a major airline with a $120 fare including:
- Free carry-on
- Two free checked bags
- Basic seat selection at check-in
- Total: ~$120

In this case, the airline with a higher base fare is clearly the cheaper choice once you add your real needs.

Example 2: Weekend City Break in Europe with Only a Personal Item

Option A: Ryanair at €15 each way, personal item only.
Option B: Legacy airline at €70 each way, including checked bag and meal.

If you truly only carry a small personal bag, the ULCC is significantly cheaper. If you need a larger carry-on or checked bag, the cost gap narrows or vanishes.

Tips to Always Get the Best Deal, Regardless of Airline

Book early for peak seasons (holidays, summer): low-cost seats sell out first.
Book closer for off-peak: sometimes last-minute sales appear when demand is weak.
Use points and miles: sometimes a “more expensive” full-service airline becomes effectively free with loyalty programs.
Clear cookies or use incognito mode when searching repeatedly (some users report price variations, though evidence is mixed).
Consider package deals: bundles with hotels or cars can reduce overall trip cost.

Summary: How to Decide Which Airline is Cheapest for You

There is no universal answer to “What is the cheapest airline?” because:

Prices change constantly.
Each airline uses different fee structures.
Your baggage, flexibility, and comfort needs matter.

To identify the cheapest airline for your specific trip:

Search broadly using flight comparison tools.
Include nearby airports and flexible dates.
Check total trip cost, including bags, seats, and extra fees.
Compare low-cost and full-service airlines on an equal basis.
Factor in reliability, comfort, and flexibility, not just the headline fare.

By focusing on total value instead of the lowest initial price, you’ll consistently choose the airline that is truly the cheapest for your personal situation and travel style.