As a market-leading intelligence resource for the global aviation finance industry for more than 40 years, we provide the latest news, insightful analysis, league tables, and proprietary aviation data covering fleets, deals, airlines’ financial, and relative ratings of the airline financial strength. Our product suite includes: Here are the world's 20 biggest airlines in the world by the number of seats made available to customers: Advertisement. 20. Alaska Airlines. Alaska Airlines. KFSrL. 322 426 54 40 437 450 24 203 346

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