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

HistoSonics Opens Expanded Histotripsy Training Center in Hong Kong20.7.2026 15:00:00 EEST | Press release

HistoSonics today announced the opening of its expanded Histotripsy Training Center in Hong Kong, reinforcing the city's position as a leading hub for physician education, clinical collaboration, and innovation in Asia. This press release features multimedia. View the full release here: https://www.businesswire.com/news/home/20260720812810/en/ Pictured at the expanded Histotripsy Training Center in Hong Kong. Front row (left to right): Dr. Angus Yuen, Chief Medical Officer, Gleneagles Hospital Hong Kong; Prof. Albert Chan, Director of Liver Cancer Surgery Centre, Gleneagles Hospital Hong Kong; Dr. Kenneth Tsang, Regional Chief Executive Officer, IHH Healthcare North Asia, and Chief Executive Officer, Gleneagles Hospital Hong Kong; Dr. Vince Lau, Director of Interventional Radiology Centre, Gleneagles Hospital Hong Kong; Dr. Joe Herman, Vice President, Medical Affairs, HistoSonics. Back row (left to right): Jay Lee, APAC Regional Manager, HistoSonics; Eric Kwong, Hong Kong Sales Manager

Shaping a Generation Through Dialogue: Inside the Doha Debates Ambassador Program20.7.2026 14:29:00 EEST | Press release

In a world shaped by change and competing narratives, the ability to listen, question and engage in constructive dialogue has never been more critical. Through the Doha Debates Ambassador Program, a production of Qatar Foundation, young people from around the world are not only learning these skills, but actively applying them in their communities, careers and areas of study. This press release features multimedia. View the full release here: https://www.businesswire.com/news/home/20260720452437/en/ Shaping a Generation Through Dialogue: Inside the Doha Debates Ambassador Program. Applications are open for young people from around the world to learn to engage and lead through truth-seeking conversations about complex global issues. (Photo: AETOSWire) This online educational program teaches young people from across the globe to debate differently. Rather than engaging in a Western-style battle of ideas, participants take an approach to dialogue that is grounded in the Majlis—a welcoming

Kinaxis Appoints Herb Yeh as Chief Financial Officer and Chief Strategy Officer20.7.2026 14:01:00 EEST | Press release

Kinaxis® Inc. (TSX:KXS), a global leader in supply chain planning and orchestration, today announced the appointment of Herb Yeh as Chief Financial Officer and Chief Strategy Officer, effective July 27, 2026. In this role, Yeh will oversee the global finance organization and corporate strategy operations at Kinaxis, leading all Finance, Accounting, Investor Relations, Corporate Strategy, and Corporate Development. He will work closely with the executive leadership team and Board of Directors to support disciplined execution, long-term growth, and shareholder value creation. "Herb has spent his career working with boards and management teams at their most critical inflection points in enterprise software, and we are thrilled to have him join Kinaxis," said Razat Gaurav, Chief Executive Officer of Kinaxis. "He has followed Kinaxis and the broader supply chain technology sector closely for more than a decade, and that depth of perspective, paired with his expertise advising companies on c

IFF Announces Agreement to Sell Its Portfolio of Botanical Extracts, Vitamins & Minerals and Food Enhancement Activities to SuanNutra, a Portfolio Company of Carbyne Equity Partners.20.7.2026 13:45:00 EEST | Press release

IFF (NYSE: IFF) — a global leader in flavors, fragrances, and health and biosciences — today announced that it has entered into an agreement with SuanNutra, a Carbyne Equity Partners portfolio company and global provider of science-backed branded and functional ingredients, to sell its portfolio of botanical extracts, vitamins and minerals, and food enhancement activities, including its range of natural colors and antioxidants and certain localized flavor activities in Peru. The portfolio serves a broad range of food, beverage and nutritional end markets through a comprehensive selection of customized solutions. “These businesses are highly respected, and we are confident they will continue to thrive under the ownership of SuanNutra and Carbyne,” said Erik Fyrwald, CEO IFF. “This transaction is another step in optimizing our portfolio and reinforces our focus on our core innovation-led businesses — Taste, Scent and Health & Biosciences — where we see the greatest opportunities to drive

NIQ Appoints Irina Stoian as Chief AI Commercial Officer20.7.2026 13:45:00 EEST | Press release

NIQ today announced that Irina Stoian has joined the company as Chief AI Commercial Officer, a newly created role designed to accelerate NIQ’s enterprise AI commercial strategy and help clients turn the company’s AI capabilities into business impact and growth. Stoian will help align Product, Technology, Commercial, Partnerships, and Marketing around a unified AI growth strategy. Her remit includes shaping commercial AI offerings, strategic partnerships, pricing and business models, and deeper integration of NIQ capabilities into client workflows. The appointment builds on NIQ’s broader AI strategy, which positions the company as a trusted intelligence infrastructure powering AI-driven commerce. Across its AI portfolio, including ConnectAI, NIQ Optiq™, and NIQ Cadence™, NIQ is expanding how clients access trusted data, intelligence, and AI-powered workflows. “AI is not a feature we are adding to NIQ; it is core to our product strategy,” said Jim Peck, Chief Executive Officer of NIQ. “I

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