Datalex, a market leader in digital commerce for retail travel, and IdeaWorksCompany, the foremost consultant on ancillary revenue, have released the second edition of The Datalex Big Book of Airline Data by IdeaWorksCompany. The 2021 edition provides a world of airline industry data collated by alphabetical order, size, airline type, region, and alliance. The first part of the Big Book contains passenger traffic results for 180 airlines. The second part of the report contains revenue results for 152 airlines. The final section provides membership data disclosed by 42 frequent flyer programs. The 78-page “Big Book” is available free of charge via download at Datalex.com and IdeaworksCompany.com.