Business Wire

Cirium: Radical Shifts in US Flight Schedules This Summer Reveal Why Airlines Need New Planning Tools to Stay Ahead of the Curve

27.10.2021 15:00:00 EEST | Business Wire | Press release

Share

The new DiioTM Schedule Snapshot offering released by Cirium, the aviation analytics firm, reveals how planning by the major US airlines changed over the summer, with 20% of flights being removed from their schedule for September.

This press release features multimedia. View the full release here: https://www.businesswire.com/news/home/20211027005581/en/

To view this piece of content from mms.businesswire.com, please give your consent at the top of this page.

The September flight schedules as published by American Airlines, Delta Air Lines, Southwest, and United Airlines initially in May compared with the revised plan published four months later. (Graphic: Business Wire)

At the start of May 2021, the plan for what carriers would fly in September was more or less in line with pre-pandemic levels in 2019. By the time they came to fly the September schedule, American Airlines, Delta Air Lines, Southwest and United Airlines had significantly cut back their flights.

Airlines are now making major changes to the way they schedule flights—publishing or removing them much closer to the date of departure as they struggle with the uncertainties brought on by the pandemic.

Prior to the pandemic schedules would remain fairly stable over a season, with few changes—positive or negative—as the plan was refined.

Only 3% of flights were removed from the September schedule in 2019 compared with the plan published in May that year.

The new Diio Schedule Snapshot web-based tool enables airlines and airports to track changes to the flights being scheduled at different points in time. It provides much more detail on schedule changes than has been done in the past.

“In today's environment where travel restrictions and vaccination programs are significantly impacting flight schedules, airlines have had to adapt and issue changes to their schedules frequently and much closer to the day of departure. The traditional methods used to analyze demand need to be more dynamic,” said Kevin O’Toole, Chief Strategy Officer at Cirium.

“Using Diio Schedules Snapshot, airlines and airports can understand schedule changes over time, optimize future schedules, build stronger models for planning and revenue management, and optimize yield through trend analysis.”

The analysis of the major US airlines evidences the radical shift in the summer flight schedule and the impact that the pandemic has had on the variance in airline planning year-over-year.

Understanding and comparing changes to the published flight schedule over time as it gets closer to actual departure, enables analysts to stay ahead of the curve, and provides new insights for planning and revenue management.

Reviewing historical data by publication date also provides insights on airline and airport strategies in an uncertain world.

Diio Schedule Snapshot is part of the unrivaled Cirium Diio suite of products for airline planning. The suite includes Diio Mi, SRS AnalyserTM, Cirium Scenario Planner, and Diio Traffic and Fares.

The new tool integrates with Cirium Diio Mi or SRS Analyser and is the first of many more new tools in the Cirium pipeline to help airlines optimize their schedules and find new revenue opportunities.

More information on Diio Schedule Snapshot can be found at https://cirium.com/products/views/diio-schedule-snapshot

-End-

For further information please visit https://www.cirium.com and follow Cirium updates via LinkedIn and Twitter.

About Cirium

Cirium brings together powerful data and analytics to keep the world moving. Delivering insight, built from decades of experience in the sector, enabling travel companies, aircraft manufacturers, airports, airlines and financial institutions, among others, to make logical and informed decisions which shape the future of travel, growing revenues and enhancing customer experiences. Cirium is part of RELX, a global provider of information-based analytics and decision tools for professional and business customers. The shares of RELX PLC are traded on the London, Amsterdam and New York Stock Exchanges using the following ticker symbols: London: REL; Amsterdam: REN; New York: RELX.

To view this piece of content from cts.businesswire.com, please give your consent at the top of this page.

Contact information

For media enquiries please contact:

Mike Arnot, Juliett Alpha via cirium@juliettalpha.com

or the Cirium media team at media@cirium.com

About Business Wire

For more than 50 years, Business Wire has been the global leader in press release distribution and regulatory disclosure.

Subscribe to releases from Business Wire

Subscribe to all the latest releases from Business Wire by registering your e-mail address below. You can unsubscribe at any time.

Latest releases from Business Wire

Egon Zehnder Elects German Herrera as New Chair28.1.2026 21:01:00 EET | Press release

Egon Zehnder, the world’s premier leadership advisory firm, today announced that, in accordance with its established governance and three-year election cycle, German Herrera has been elected as the Firm’s next Chair by its worldwide partnership. Herrera will assume the role effective March 1, 2026. He will succeed Michael Ensser, who has held the position since 2022, in a planned succession at the conclusion of his regular term. Herrera joined the Firm in 1998 in Bogotá and has helped shape the Firm’s global presence, taking on a broad range of leadership roles, from co-leading the Global Family Business Advisory Practice to serving on the Executive Committee and the Market Council. Most recently, Herrera has guided Egon Zehnder’s U.S. market through a period of impressive growth and transformation, which today includes 15 offices and more than 150 consultants. As the first Latinx person in this role in the industry, he actively forges strategic partnerships and joint ventures. With ex

De' Longhi Group - Record Preliminary 2025 Revenues of €3.8 Billion, up 10.4% at Constant Exchange Rates28.1.2026 20:25:00 EET | Press release

Below are the preliminary 2025 revenues for the De’ Longhi S.p.A. Group: This press release features multimedia. View the full release here: https://www.businesswire.com/news/home/20260128191504/en/ 12 months, revenues at € 3,801.5 million, growing at 8.7% (+10.4% at constant currency); fourth quarter, revenues at € 1,340.0 million, growing at 5.7% (+8.2% at constant currency). Fabio de' Longhi, CEO of the Group, stated: "The Group achieved solid growth at constant currency of 10.4% in 2025, characterized by consistent results throughout the year. We are particularly pleased with the excellent performance achieved in the fourth quarter, which successfully overcame the challenges posed by the current market environment. The household division consolidated its recent growth momentum during the quarter, with organic growth of 5.2% against a challenging year-over-year comparison. This performance was primarily driven by the structural trend in coffee, amplified by strategic media investmen

Organon Completes Divestiture of JADA ® System to Laborie28.1.2026 19:45:00 EET | Press release

Organon (NYSE: OGN), a global healthcare company with a mission to deliver impactful medicines and solutions for a healthier every day, announced today the successful closing of the sale of its JADA® System to Laborie Medical Technologies Corp. Please see our prior announcement for a summary of the transaction terms. Indications for Use The JADA® System is intended to provide control and treatment of abnormal postpartum uterine bleeding or hemorrhage when conservative management is warranted. Contraindications Ongoing intrauterine pregnancy Untreated uterine rupture Unresolved uterine inversion Current cervical cancer Known uterine anomaly Current purulent infection of vagina, cervix, or uterus For C-sections: Cervix <3 cm dilated before use of JADA Warnings Avoid excessive force when inserting JADA into the uterus or trauma to uterine wall may occur, including perforation. The safety and effectiveness of the JADA System in delivery at a gestational age <34 weeks or, if multiples, uter

Laserfiche Expands AI Data Capture with Auto-Classification to Transform Data into Business Intelligence28.1.2026 17:00:00 EET | Press release

Laserfiche — the leading SaaS provider of intelligent content management — today announced major enhancements to its AI-powered data extraction tool, Smart Fields. The update introduces automated document classification and tagging, allowing organizations to move from unstructured content to informed decisions in seconds. This press release features multimedia. View the full release here: https://www.businesswire.com/news/home/20260128228490/en/ Using natural language prompts instead of rigid, ruled-based OCR, Smart Fields can now identify document type — such as invoices, taxpayer identification forms, or student transcripts — and automatically apply the correct metadata template using AI. Users can also use Smart Fields to automatically add informational and security tags to files that meet certain criteria, defined using a natural language prompt. Users can capture key details, route documents, and apply the proper metadata tags instantly and at scale. “Success in today’s AI-driven

Andersen Consulting Adds Collaborating Firm HaystackID28.1.2026 16:30:00 EET | Press release

Andersen Consulting strengthens its cybersecurity and technology capabilities through a Collaboration Agreement with HaystackID, a U.S.-based provider of eDiscovery, legal data, and cyber discovery services. Founded in 2011, HaystackID works closely with law firms, corporations, and governmental agencies to manage complex, data-intensive legal matters, including civil litigation, regulatory inquiries, and internal investigations. The firm delivers end-to-end litigation support through cyber discovery, digital forensics, managed review, compliance, and information governance services, enabling clients to identify, analyze, and defensibly produce critical data. Leveraging proprietary AI-driven platforms and expert-led review teams, HaystackID supports clients across North America and Europe, including Fortune 100 companies. “As legal and regulatory environments become more data-driven and time-sensitive, we continue to evolve our litigation support capabilities, from advanced analytics a

In our pressroom you can read all our latest releases, find our press contacts, images, documents and other relevant information about us.

Visit our pressroom
World GlobeA line styled icon from Orion Icon Library.HiddenA line styled icon from Orion Icon Library.Eye