Best Airlines for Budget Travel

Understanding the Budget Airline Model

Budget aviation has democratised air travel. In Europe, Ryanair and easyJet have made it possible to fly between cities for less than the price of a train ticket. In Southeast Asia, AirAsia has opened up air travel to hundreds of millions who could not previously afford to fly. In North America, Spirit and Frontier have driven down prices on competitive routes, forcing legacy carriers to respond with basic economy fares of their own.

The budget airline model — formally known as the ultra-low-cost carrier (ULCC) model — is built around a single principle: offer the lowest possible base fare and charge separately for everything else. The aircraft itself (a single type, usually the 737 or A320 family), the flight, and a small personal item are what you pay for in the base fare. Everything from a checked bag to a seat assignment to a bottle of water costs extra.

This is not inherently bad. A traveller who books early, packs light, skips checked bags, brings their own food, prints their boarding pass, and does not need to change plans can fly extraordinarily cheaply. The problems arise when travellers misunderstand what is included and encounter surprise fees at the airport — the industry's most persistent source of passenger frustration.

Top Budget Carriers by Region

Europe: Ryanair and easyJet

Ryanair is Europe's largest airline by passenger numbers and arguably the purest expression of the ULCC model. Based in Ireland, it operates exclusively 737s (with 737 MAX expansion underway), flies to secondary airports (Beauvais instead of Paris Charles de Gaulle, Bergamo instead of Milan Malpensa), and extracts maximum revenue from ancillary sales. Fares of €9.99 on promotional sales are genuine, though fully loaded prices rise substantially. easyJet operates from primary airports at slightly higher fares but with less restrictive baggage policies and a more straightforward booking experience. Wizz Air, the Hungarian ULCC, has expanded aggressively across Central and Eastern Europe and into the Middle East.

North America: Spirit, Frontier, and Allegiant

Spirit Airlines operates one of the densest aircraft configurations of any US carrier — 28-inch pitch in economy — but at fares that can undercut legacy carriers by 60–80%. Frontier Airlines has shifted to an even more aggressive ancillary model, charging for carry-on bags, seat selection, and printing boarding passes. Allegiant Air focuses on leisure routes between mid-sized cities and resort destinations, offering a point-to-point network with no hub connectivity. Southwest Airlines occupies a middle ground: it charges no bag fees for two checked bags, no change fees, and operates from primary airports — a fundamentally more consumer-friendly model that has earned remarkable passenger loyalty.

Southeast Asia: AirAsia and Lion Air

AirAsia, headquartered in Kuala Lumpur, operates one of the largest short-haul networks in the world and has spawned affiliated carriers in Thailand (Thai AirAsia), Indonesia (Indonesia AirAsia), Philippines (AirAsia Philippines), and Japan (AirAsia Japan). Its base fares are genuinely low — promotional fares of RM9 (under $2 USD) are occasional headline items — and it has introduced AirAsia X for medium and long-haul operations. Lion Air is Indonesia's largest carrier by volume and serves an enormous domestic market with competitive pricing.

Australia and New Zealand: Jetstar

Qantas's budget subsidiary Jetstar operates domestically in Australia and throughout Asia-Pacific. It provides access to leisure destinations at lower fares than Qantas, with a similar ancillary model. Bonza, a newer Australian ULCC, launched in 2023 targeting regional routes previously underserved by competition.

Understanding and Avoiding Hidden Fees

The term "hidden fees" is slightly misleading — budget carriers disclose their fees, but they are designed to be encountered after the initial fare quote when a traveller has already invested psychological commitment to the purchase. Understanding the full fee structure before booking is essential.

Baggage fees are the largest additional cost for most budget travellers. Carry-on bag allowances vary significantly: Ryanair permits a small personal item (40x20x25cm) for free and charges for a cabin bag (55x40x20cm) and priority boarding. Spirit charges for carry-on bags booked after initial purchase. Frontier's carry-on fees are among the highest in the industry. Calculating the total cost including one checked bag often reveals that a legacy carrier's basic economy fare is competitive or cheaper.

Seat selection fees apply on virtually all budget carriers. Declining to pay means being randomly assigned a seat at check-in — which typically means a middle seat. On long flights, paying for a window or aisle seat is usually worthwhile.

Check-in fees are charged by some carriers (notably Ryanair) for airport check-in rather than online. Ryanair's airport check-in fee of €55 is one of the most notorious in the industry. Always check in online before arriving at the airport.

Payment fees are rare now due to regulations in many markets but still appear in some jurisdictions. Using a credit card may incur a surcharge of 1–3%.

Strategies for Booking Budget Flights Cheaply

Timing is the most powerful lever in budget flight booking. Budget carriers typically release fares furthest in advance at the lowest prices, with promotional sales offering the steepest discounts. Booking six to twelve weeks ahead generally captures good fares on European short-haul; further ahead (three to six months) for intercontinental routes.

Flexibility on dates and airports multiplies options significantly. Flying on a Tuesday or Wednesday rather than Friday evening can halve the fare on popular leisure routes. Using secondary airports — Stansted instead of Heathrow, Ciampino instead of Fiumicino — adds surface transport time but can reduce fares dramatically.

Flight alert services — Google Flights price tracking, Skyscanner alerts, Hopper — notify travellers when fares drop on specific routes. Setting alerts for desired city pairs and being prepared to book immediately when fares spike downward is a reliable strategy for capturing promotional fares.

Booking directly on the airline's website or app avoids third-party booking fees and ensures the best seat and baggage management tools. Some metasearch results direct to third-party booking agents whose prices appear lower but whose service recovery in disruption is significantly worse.

How Ultra-Low-Cost Carriers Differ from Low-Cost Carriers

Not all budget airlines are equal. A useful distinction exists between low-cost carriers (LCCs) and ultra-low-cost carriers (ULCCs). LCCs like Southwest, easyJet, and JetBlue offer relatively straightforward fares, primary airports, and more generous inclusions. ULCCs like Spirit, Frontier, Wizz Air, and Ryanair optimise for the absolute lowest base fare and unbundle virtually every service element.

The aircraft configuration tells the story. Southwest's 737-800s seat 143 passengers with 31–32-inch pitch. Spirit's A320s seat 182 passengers with 28-inch pitch. Frontier's A320s seat 186. The extra rows of seats reduce per-seat operating costs, enabling lower base fares, but compress passenger space substantially.

Hybrid models are emerging. WestJet in Canada, Vueling in Spain, and Volotea in Europe occupy middle ground — more inclusions than pure ULCCs but lower fares than traditional full-service carriers. These hybrids often provide the best value for travellers who want predictable total cost without paying full-service prices.

Maximising Comfort on Budget Airlines

Budget flying does not require suffering, but it requires preparation. Several strategies meaningfully improve the experience within the budget carrier model.

Choose your seat. Even paying $15–25 for a preferred seat is worthwhile on flights over two hours. Window seats avoid aisle disturbance; exit row seats offer extra legroom at a premium. Seats near the front board later but deplane faster. Avoid the rear rows, which are noisier and recline less (or not at all) near the lavatories.

Bring your own food. Budget carrier food and beverage pricing is dramatically higher than ground prices. Bringing a meal, snacks, and a reusable water bottle (filled after security) costs almost nothing and is almost always superior in quality. Most airports have food options airside.

Download offline entertainment. Budget airlines typically charge for IFE or offer only streaming to personal devices. Downloading films and podcasts to a phone or tablet before departure eliminates this cost and reliance on in-flight Wi-Fi.

Dress in layers. Budget aircraft cabins often run cool, and budget carriers do not typically provide blankets. A light fleece or jacket prevents discomfort on longer flights.

Best Routes for Budget Travel

Budget carriers dominate certain route types: short-haul leisure routes with high demand and good competition. In Europe, London to Amsterdam, Barcelona, Rome, and Dublin are served by multiple budget carriers with frequent competitive pricing. In North America, routes between major leisure destinations — Orlando, Las Vegas, Cancun, Cabo — are ideal budget carrier territory.

Within Southeast Asia, Bangkok–Kuala Lumpur, Singapore–Bali, and Manila–Cebu are among the world's most competitively priced short-haul routes. The density of budget carriers operating across the ASEAN region has made air travel cheaper per kilometre than almost anywhere else on earth.

When Budget Airlines Are the Wrong Choice

Budget carriers are not appropriate for every situation. Tight connections are risky: budget carriers do not typically interline with other airlines, meaning a missed connecting flight is entirely the traveller's problem. Booking a budget flight arriving three hours before a time-sensitive onward connection is a gamble.

Families with young children and lots of luggage face fee structures that can make budget flights expensive in total cost. Checked bags, seat selection to sit together, and possible pushchair fees can add $100–200 to a family of four's stated fare.

Travellers with complex itineraries, who may need to change plans, or who are travelling for important occasions where disruption would be costly should factor in the operational reliability record of budget carriers — which is, on average, slightly worse than legacy carriers — and the limited recourse available when things go wrong. Budget carriers' customer service operations during disruption are typically less resourced than full-service carriers.