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

Ouster Releases The REV8 OS Family: The World’s First Native Color Lidar4.5.2026 13:00:00 EEST | Press release

Ouster, Inc. (Nasdaq: OUST) (“Ouster” or the “Company”), a leader in sensing and perception for Physical AI, announced today its new family of OS digital lidar sensors, Rev8, powered by its next-generation L4 Ouster Silicon. Ouster Rev8 features the world’s first patented native color lidar sensors, provides up to double the range and resolution of the previous generation, and is designed for functional safety, reliability, affordability, and scale. This press release features multimedia. View the full release here: https://www.businesswire.com/news/home/20260504718668/en/ The REV8 OS Family: The World's First Native Color Lidar. L4 Ouster Silicon: Ouster’s breakthrough L4 architecture doubles the range and resolution of its lidar over the prior generation, adds native-color sensing, and is designed for functional safety. Based on patented Ouster Silicon with embedded Fujifilm color science, the L4 chip results in exquisite color data and hardware-enabled HDR. It boasts 42.9 GMACs of p

NIQ Research Reveals New Rules of Commerce: AI Is Beginning to Decide What Consumers Buy4.5.2026 13:00:00 EEST | Press release

NielsenIQ (NYSE: NIQ) has announced the release of its new global report, The Commerce Revolution: Where East Meets West, which examines how Eastern-led commerce innovation and Western retail media monetization are colliding to reshape global consumer commerce. This press release features multimedia. View the full release here: https://www.businesswire.com/news/home/20260428841965/en/ The report finds live, social, and quick commerce—long scaled across Asia—now drive most incremental digital growth worldwide, while Western markets accelerate adoption as these formats localize. At the same time, retail media networks (RMNs) have become one of the fastest‑growing advertising channels globally, with US retail media ad spend projected to reach $107.6 billion (USD) in 2026. Beyond this, the report finds that previously siloed operational functions of sellers are beginning to blur boundaries. Payment platforms and rapid fulfillment models from the East are converging with the monetization mo

OPAQUE Acquires Abu Dhabi-Developed Cryptographic AI Technology from TII, Extending Confidential AI Across the Full Lifecycle with Post-Quantum Protection4.5.2026 11:23:00 EEST | Press release

OPAQUE, the Confidential AI company headquartered in San Francisco, California, today announced it has acquired advanced cryptographic AI technologies from the Technology Innovation Institute (TII), the applied research pillar of Abu Dhabi's Advanced Technology Research Council (ATRC). The acquired technology — already proven in real-world use cases — adds two critical capabilities to OPAQUE's platform: confidential AI model training powered by advanced cryptographic techniques such as multi-party computation and fully homomorphic encryption, as well as post-quantum cryptographic protections. This press release features multimedia. View the full release here: https://www.businesswire.com/news/home/20260504705475/en/ OPAQUE Acquires Abu Dhabi-Developed Cryptographic AI Technology from TII, Extending Confidential AI Across the Full Lifecycle with Post-Quantum Protection (Photo: AETOSWire) Founded by researchers from UC Berkeley's RISELab, and now with this acquisition, OPAQUE supports Co

Forbes Includes Philip Morris International in Its Net Zero Leaders List4.5.2026 11:00:00 EEST | Press release

Philip Morris International (PMI) (NYSE: PM) has been included once more in Forbes’ 2026 Net Zero Leaders1 list, recognizing its leadership and continued progress in advancing climate action across its global operations. The Forbes Net Zero Leaders list highlights U.S. publicly listed companies best positioned to achieve net zero emissions by 2050, based on measurable performance rather than commitments alone. Despite most companies aligning to a 2050 net zero horizon, PMI remains committed to reaching net zero by 2040, as set out in its Climate Transition Plan published in 2025. This aspiration reflects PMI’s confidence in collective progress, trust that ambition drives innovation, that policy will evolve to enable change, and collaboration will accelerate system‑wide transformation. Above all, it signals hope: that by acting early and holding firm, PMI can help build the critical momentum needed to shift markets, technologies, and mindsets, and inspire similar action across its value

Mobius Renewables Acquires Air Liquide’s Biogas Production Activities in the United States, France, Norway, and Sweden4.5.2026 09:45:00 EEST | Press release

Mobius Renewables today announced the closing of the acquisition of Air Liquide’s biogas production activities in the United States, France, Norway, and Sweden. The acquisition includes six operating landfill gas-to-RNG (Renewable Natural Gas) sites in the U.S., five operating farm waste sites in France, and a 51% interest in Redo Biosolutions with production and distribution assets across Norway and Sweden. The acquired portfolio will be a meaningful addition to Mobius Renewables (“the Company”), a global, vertically integrated low carbon fuels platform established in December 2025 by funds managed by IFM Investors to accelerate the development, production, distribution, and commercialization of RNG at scale across North America and Europe. The Company is headquartered in Houston, Texas with additional offices in the United States, France, Norway, and Sweden. With this transaction, the establishment of Mobius Renewables is complete, and GreenGasUSA and the acquired portfolio will oper

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