The Boeing 737 MAX has quietly become one of the most widely used aircraft families in global aviation, supporting airline recovery and network expansion after the pandemic. Its fuel efficiency and range make it attractive to carriers seeking lower costs and greater flexibility, which explains why one airline now operates more MAX flights than any other.

Using fresh 2025 schedule intelligence from Cirium’s Diio Mi platform, this guide examines who leads the rankings, how the MAX shapes passenger travel across key markets from the Americas to Europe and the Middle East, and what these operations reveal about future fleet and route strategy.

The Airline Flying More Boeing 737 MAX Aircraft Than Any Other

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When it comes to the Boeing 737 MAX, one airline stands head and shoulders above the rest in operational volume. Based on 2025 global schedule intelligence, Southwest Airlines is the world’s most prolific MAX operator. The carrier is projected to operate an astonishing 445,505 flights using the 737 MAX family, overwhelmingly more than any other airline. Interestingly, some of Southwest’s highest MAX utilization occurs in Hawaii, where the aircraft supports inter-island flying as well as services between the islands and the US mainland.

This dominance reflects Southwest’s long-standing identity as an all- Boeing narrowbody airline. The company has built its model on simplicity, commonality, and frequency. Because it operates only 737 variants, the MAX plays a central role in replacing older NG aircraft and fueling the carrier’s vast USA domestic network.

Multiple daily frequencies on short-haul and medium-haul segments means the MAX is constantly moving, making Southwest’s fleet one of the highest-utilization examples on record. To put that scale into context, the second-largest 737 MAX operator, United Airlines, schedules 257,716 MAX flights in 2025, barely over half of Southwest’s total.

This enormous gap shows how Southwest’s business model aligns perfectly with the MAX platform, embedding the aircraft into nearly every corner of its network.

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Southwest may dominate the totals, but the story of the Boeing 737 MAX in 2025 stretches far beyond the borders of the United States. From Europe’s biggest low-cost airlines to Middle Eastern connectors and Latin American carriers, the MAX has become deeply embedded in international fleet strategies. According to schedule intelligence based on Cirium’s data, the aircraft family is now central to growth in many regions around the world, not only in the United States.

After Southwest and United, Ryanair ranks third globally with 215,610 MAX flights scheduled in 2025. This reflects the Irish carrier’s rapid fleet expansion, where the MAX replaces older models and supports its dense point-to-point network across Europe and North Africa. Brazil’s GOL Linhas Aéreas follows with 105,403 MAX flights, a number that has helped the airline strengthen connectivity across South America. Meanwhile, flydubai sits in the middle with 89,009 flights, demonstrating how Gulf carriers use the aircraft for regional and secondary markets.

These figures reveal that emerging markets have embraced the MAX as a cost-effective growth engine, particularly where competition and fuel prices demand efficiency.

Taken together, these carriers show that the MAX is no longer tied to the US market only. The aircraft now connects Mexico with South America, Dubai with Central Asia, and Europe with North Africa. Its reach is broader than ever before, and its influence is growing. With strong fuel efficiency, commonality benefits, and expanding delivery pipelines, the MAX has become one of the most strategically important narrowbody aircraft of the decade.

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Why Southwest Ranks Number One: Fleet Strategy Meets Network Scale

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From its earliest years, Southwest embraced a single aircraft family strategy. By flying only Boeing 737s, the airline avoided the complexity of mixed fleets. This approach reduced training time, streamlined maintenance, standardized spare parts, and allowed pilots to transition between aircraft with minimal friction. These efficiencies are still central to Southwest’s identity today.

The MAX fits this philosophy perfectly. It delivers lower fuel burn, reduced maintenance costs, and flexible cockpit commonality while maintaining the same operating rhythm as older models. The aircraft has become vital to Southwest’s business because of how the airline uses it. Many of its routes are short or medium-haul segments flown multiple times per day, meaning aircraft turn quickly and rack up cycles at some of the highest rates in the industry.

As more MAX aircraft arrive and replace aging 737 800s, Southwest’s fleet is only becoming more MAX-focused. This transition amplifies its efficiency advantage and keeps its operating model tightly aligned with the aircraft. Unless another low-cost carrier accelerates capacity deployment at an extraordinary pace, Southwest’s position as the number one MAX operator is likely to extend well beyond 2025.

The Market Implications Of MAX Dominance

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Understanding which airline flies the most Boeing 737 MAX aircraft routes reflects deeper shifts in airline strategy, competitive dynamics, and global market development. With Southwest alone planning 445,505 MAX flights in 2025, as per Cirium data, the aircraft’s role has become central not only in the United States but across an increasingly interconnected world. Southwest’s leadership highlights a broader pattern.

Airlines everywhere are leaning heavily on newer generation narrowbodies to control costs and grow capacity without expanding widebody fleets. American Airlines, for example, is scheduled to operate 91,603 MAX flights, while Aeromexico adds 79,341 flights, strengthening its footprint throughout the Americas. Even in regions where widebodies dominate long-haul traffic, carriers like FlyDubai use the MAX for regional connectivity and secondary market development, contributing 89,009 flights through 2025.

These trends reveal how the MAX enables airlines to do more with less. Rather than waiting for large aircraft to fill long-haul routes, carriers can deploy the MAX more frequently to grow markets organically and profitably.

For Boeing, this dominance translates into lasting influence. The backlog for the MAX remains strong and continues to anchor fleet renewal programs for airlines with low-cost, hybrid, and network models. The data also signals who Boeing’s most important customers will be in the future. Based on utilization patterns, low-cost carriers appear poised to remain the largest users of the type, reinforcing their role as the engine of MAX growth globally.

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Passenger Experience: What Flying The MAX Means For Travelers

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With so many airlines turning to the Boeing 737 MAX, passengers increasingly find themselves flying on it, sometimes without realizing it. For most travelers, what matters is not the aircraft designation but how the journey feels. The good news is that the MAX brings several improvements designed to make cabins quieter, brighter, and more efficient.

Inside, many passengers first notice the calmer sound profile. The engines and interior insulation give the cabin a more modern tone that softens the background roar familiar from older narrowbody jets. Larger windows admit more daylight, helping the cabin feel less enclosed. Some airlines, especially those using the MAX heavily, like Southwest and United, redesigned their interiors with slimmer seats and reconfigured bins to speed boarding and create more overhead space.

The experience varies by carrier. Ryanair uses the MAX to increase seating density while keeping fares extremely competitive. Others, like FlyDubai and Aeromexico, use the aircraft to introduce upgraded economy cabins and more premium seating where appropriate. This variety is one reason travelers may have very different impressions of the MAX depending on where and with whom they fly.

For most passengers, the greatest benefit of the MAX is one they never think about directly: fuel efficiency. Because airlines save considerable operating costs compared to older jets, many can sustain competitive fares on high frequency routes. That means flights operated by aircraft like the MAX often support the dense, affordable networks of carriers such as Southwest, Aeromexico, or GOL, which in turn gives travelers more choice and frequency.

So, despite the MAX gaining public attention for airworthiness issues in its early years, the way passengers experience it today is largely shaped by cabin configuration, service levels, and route selection. For the average flyer, it feels quiet, modern, and familiar, blending into the travel experience rather than defining it.

What The Future Holds For MAX Operators

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The story of the Boeing 737 MAX flights in 2025 is not about peak deployment but momentum. Deliveries continue, order books remain full, and airlines are weaving the aircraft deeper into long-term fleet strategy. According to Cirium Diio Mi schedule intelligence, the sheer volume of planned MAX flights among leading carriers signals how central the type has become to their business models today and well into the next decade.

For operators like Southwest, this trajectory reinforces their already commanding lead. As more MAX aircraft arrive, older 737 models will gradually retire, making Southwest even more reliant on the type. The airline is likely to retain its position as the airline operating the most 737 MAX flights globally well beyond 2025.

Meanwhile, emerging markets such as Brazil and Mexico continue to grow their use of the MAX, expanding capacity and accessibility on routes that were previously too thin for larger aircraft.

The future landscape is also shaped by competitive pressure. Airbus has steadily strengthened its Airbus A320neo family, especially the Airbus A321neo, which appeals to airlines seeking extra capacity without moving to widebodies. Boeing will need to continue refining the MAX, potentially with further performance improvements or updated cabin options, to preserve market momentum.

Looking ahead, the MAX is likely to play a critical role in three major areas:

• Regional market development: The MAX allows airlines to open new routes and grow secondary markets without committing to widebody aircraft or taking excessive financial risk.
• Sustainability progress: Even modest fuel burn savings add up, helping carriers pursue emissions targets while maintaining operational flexibility.
• Fleet renewal strategy: As older narrowbodies retire, the MAX provides a modern, efficient replacement that reduces maintenance burden and supports long-term cost stability.