Top 10 Airlines by Passenger Traffic in the World

The global aviation industry plays a crucial role in connecting people, cultures, and economies. Passenger traffic is one of the most important indicators of an airline’s scale and operational strength. Based on approximate annual passenger numbers, the following are the top 10 airlines in the world, each representing a significant force in global aviation. For a deeper comparison, you can also explore our guide on top airlines in the world by revenue, fleet size, and other parameters. This helps you to better understand how these carriers rank beyond passenger traffic.

World’s Top 10 Airlines by Passenger Traffic in 2025

Passenger traffic is a crucial indicator of airline performance, reflecting network size, operational efficiency, and global demand. The top airlines by passenger traffic in 2025 highlight a mix of full-service and low-cost carriers that connect major global destinations while serving millions of travelers annually. Take a glance -

1. American Airlines – 225 Million Passengers

Leading the global aviation industry is American Airlines (AA), headquartered in the United States. Carrying approximately 225 million passengers annually, it holds the top position due to its vast domestic and international network. The airline operates an extensive fleet and serves hundreds of destinations worldwide. AA operates almost 6,800 flights to nearly 350 destinations in 60+ countries. Its dominance is largely driven by the massive U.S. domestic market, along with strong alliances and major hubs such as Dallas and Miami. To see how it compares on other key metrics, check our in-depth guide on top airlines in the world by seat capacity and total flights. 

2. Delta Airlines – 200 Million Passengers

Delta Air Lines ranks second globally, transporting around 200 million passengers each year. Delta Air Lines and Delta Connection operate up to 4,700+ daily flights to 300+ destinations across 6 continents. Known for its operational reliability and premium customer experience, Delta has built a strong reputation among both business and leisure travelers. Its hub in Atlanta plays a key role in maintaining its high passenger traffic. Delta also benefits from strong international partnerships. Delta stands out across key performance metrics. Explore its brand value and global reach in our airline data-based guide.

3. Ryanair – 184 Million Passengers

Ryanair is Europe’s largest airline by passenger traffic and the world’s leading low-cost carrier. Based in Ireland, it carries approximately 184 million passengers annually. Its success comes from offering ultra-low fares and operating a vast network across Europe. With 3,600+ daily flights, the airline connects over 224 airports in 36 countries. The airline focuses on efficiency and cost control, making air travel affordable for millions.

4. United Airlines – 174 Million Passengers

United Airlines serves around 174 million passengers annually and is one of the largest airlines in the United States. It operates a comprehensive global network, connecting North America to Europe, Asia, and beyond. The airline operates 4,700+ (approx.) daily flights to 336+ airports across 6 continents. With major hubs in Chicago and Newark, United plays a vital role in international air travel and is a member of the Star Alliance.

5. Southwest Airlines – 140 Million Passengers

Southwest Airlines is the largest domestic low-cost carrier in the United States, serving approximately 140 million passengers. Known for its customer-friendly policies, such as no baggage fees, Southwest has built a loyal customer base. It caters to its passengers with almost 4,000 daily flights during peak periods to more than 100 destinations. Its point-to-point network allows for efficient operations and frequent flights between major cities.

6. Lufthansa Airlines – 131 Million Passengers

Lufthansa Group is a leading European aviation group based in Germany. Carrying about 131 million passengers, it includes multiple airlines such as Lufthansa, Swiss, and Austrian Airlines. With major hubs in Frankfurt and Munich, the group is known for its premium services and strong intercontinental routes, especially between Europe and North America. The Star Alliance network offers 19,000+ daily flights to 1,250+ airports in 195 countries.

7. International Airlines Group (IAG) – 122 Million Passengers

International Airlines Group (IAG) handles around 122 million passengers annually. It is the parent company of well-known airlines like British Airways, Iberia, and Aer Lingus. IAG combines both full-service and low-cost carriers, allowing it to cater to a wide range of travelers. The group runs a vast network, serving 260+ destinations in 91 countries, though daily flights vary. Its strong presence in Europe and transatlantic markets boosts its ranking.

8. IndiGo – 119 Million Passengers

IndiGo is India’s largest airline and one of the fastest-growing carriers globally. With approximately 119 million passengers, it dominates the Indian aviation market. IndiGo’s focus on punctuality, affordability, and operational efficiency has made it a preferred choice among travelers. Its expansion into international routes continues to strengthen its global presence. It operates 2,700+ daily flights to 137 destinations (94 domestic and 43 international). 

9. Air France–KLM – 98 Million Passengers

Air France–KLM is a major European airline group, carrying around 98 million passengers annually. Formed through the merger of Air France and KLM, the group operates extensive global networks from hubs in Paris and Amsterdam. It offers both premium and budget travel options, serving a diverse customer base. This airline group serves nearly 320+ destinations worldwide through its daily flights. 

10. Turkish Airlines – 83 Million Passengers

Turkish Airlines serves approximately 83 million passengers and is known for its extensive global network. Operating from its hub in Istanbul, the airline connects more countries than any other carrier. Its strategic location between Europe and Asia allows it to serve as a major transit hub, boosting its passenger numbers significantly.

Conclusion

The top 10 airlines by passenger traffic highlight the scale and diversity of the aviation industry. U.S.-based airlines dominate due to the size of their domestic market, while European and low-cost carriers emphasize efficiency and connectivity. Meanwhile, emerging markets like India are rapidly gaining importance, with airlines like IndiGo making a strong impact.

As global travel demand continues to rise, especially in developing regions, these rankings may evolve. However, these airlines currently remain at the forefront of global air transportation, connecting millions of passengers every year.

FAQs

Which airline carries the most passengers in the world?

American Airlines currently carries the highest number of passengers globally, with approximately 225 million passengers annually.

Why do U.S. airlines dominate passenger traffic rankings?

U.S. airlines dominate due to the country’s large domestic travel market, well-developed aviation infrastructure, and high demand for air travel across cities.

What is the largest low-cost airline in the world?

Ryanair is considered the largest low-cost airline globally based on passenger numbers.

Which Indian airline is in the top 10 list?

IndiGo is the only Indian airline in the top 10, carrying around 119 million passengers annually.

Which airline flies to the most countries?

Turkish Airlines officially holds the Guinness World Record for flying to more countries than any other airline in the world. Its extensive network spans 130+ countries and 300 destinations across six continents.