Temporary removal of Alerts API SMTP delivery option
Identified - Due to a security concern, we have temporarily deactivated the Alerts API SMTP (email) delivery option that is available for testing and evaluation purposes only. To continue testing the Alerts API on either the Flightstats or Sky platforms, please configure delivery to an HTTPS endpoint that accepts POST requests, as per https://developer.cirium.com/apis/cirium-sky-api/flight-alerts. We apologise for any inconvenience and will provide an update as soon as there is progress to report.
Apr 08, 2026 - 15:04 UTC

About This Site

Welcome to our status page where you can see the current status of our products. If you require further assistance please contact us through the Cirium Help Desk.

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Operational
Degraded Performance
Partial Outage
Major Outage
Maintenance

Scheduled Maintenance

Planned Quarterly Maintenance - Cirium Laminar APIs and NOTAM Streams – 05th May 2026 May 5, 2026 03:30-06:30 UTC

Cirium APIs (Laminar Data Hub), Cirium SKY Laminar APIs and the Cirium Sky Stream NOTAMS feed will be undergoing maintenance, on Tuesday, 05th May 2026, from 03:30 UTC to 06:30 UTC as part of a planned maintenance window.

During this period, the platform will undergo a series of routine maintenance tasks.

No extended downtime is expected, but temporary unavailability or reduced performance may be experienced during the period of the maintenance window.

Please note that the maintenance window might be extended if necessary, and any extensions will be promptly notified.

Please feel free to contact us if you have any concerns or questions.
Posted on Apr 10, 2026 - 12:28 UTC

Weekly Scheduled Maintenance - Flights Data Processing system May 6, 2026 10:00-12:00 UTC

We will be performing scheduled maintenance of our Flights Data Processing system on Wednesday 6th May from 10:00 to 12:00 UTC. During this period, the system will undergo a series of routine maintenance tasks. Users of services that surface flights data may experience degraded performance or interruptions. Please contact our help desk with any questions.
Posted on Apr 28, 2026 - 13:58 UTC

Planned Quarterly Maintenance – Cirium Sky Warehouse – 6 May 2026 May 6, 2026 14:00-19:00 UTC

Cirium Sky Warehouse will be undergoing maintenance on 06 May 2026 from 14:00 to 19:00 UTC as part of a planned quarterly maintenance window.

During this period, the platform will undergo a series of routine maintenance tasks.

No extended downtime is expected, but some unavailability or reduced performance may be experienced during the period of the maintenance window.

Please feel free to contact us if you have any concerns or questions.
Posted on Mar 27, 2026 - 12:12 UTC

Weekly Scheduled Maintenance - Flights Data Processing system May 13, 2026 10:00-12:00 UTC

We will be performing scheduled maintenance of our Flights Data Processing system on Wednesday 13th May from 10:00 to 12:00 UTC. During this period, the system will undergo a series of routine maintenance tasks. Users of services that surface flights data may experience degraded performance or interruptions. Please contact our help desk with any questions.
Posted on Apr 28, 2026 - 13:59 UTC

Weekly Scheduled Maintenance - Flights Data Processing system May 20, 2026 10:00-12:00 UTC

We will be performing scheduled maintenance of our Flights Data Processing system on Wednesday 20th May from 10:00 to 12:00 UTC. During this period, the system will undergo a series of routine maintenance tasks. Users of services that surface flights data may experience degraded performance or interruptions. Please contact our help desk with any questions.
Posted on Apr 28, 2026 - 14:00 UTC

Weekly Scheduled Maintenance - Flights Data Processing system May 27, 2026 10:00-12:00 UTC

We will be performing scheduled maintenance of our Flights Data Processing system on Wednesday 27th May from 10:00 to 12:00 UTC. During this period, the system will undergo a series of routine maintenance tasks. Users of services that surface flights data may experience degraded performance or interruptions. Please contact our help desk with any questions.
Posted on Apr 28, 2026 - 14:01 UTC
May 3, 2026
FlightStats.com Service Issue Affecting User Login
Resolved - This incident has been resolved.
May 3, 12:32 UTC
Update - This issue, which impacted user login and access to FlightStats.com, has been resolved, and normal service has been fully restored. All necessary corrective actions have been completed, and the platform is stable following post‑resolution monitoring. We sincerely apologize for the inconvenience this may have caused and would like to thank you for your patience and understanding throughout the incident.
May 3, 12:30 UTC
Update - This issue, which impacted user login and access to FlightStats.com, has been resolved, and normal service has been fully restored. All necessary corrective actions have been completed, and the platform is stable following post‑resolution monitoring. We sincerely apologize for the inconvenience this may have caused and would like to thank you for your patience and understanding throughout the incident.
May 3, 12:24 UTC
Update - Our Engineering team has identified the issue and is actively working on a resolution. Efforts to restore normal login access are ongoing, and we continue to closely monitor the situation. We will provide the next update within the next hour. Thank you for your patience and understanding.
May 3, 11:10 UTC
Identified - The issue has been identified, and a fix is currently being implemented. Our Engineering team is actively working on it, and we will continue to provide updates as they become available. Thank you for your understanding.
May 3, 11:00 UTC
Investigating - We would like to inform you that we are currently experiencing a service issue affecting access to FlightStats.com, which began at approximately 7:02 UTC on 3 May. During this time, customers may encounter difficulties with logging in and resetting passwords.

Our Engineering team is actively investigating the issue and working to determine the root cause. This matter is being treated as a high‑priority incident. We sincerely apologize for the inconvenience this may cause and greatly appreciate your patience as we work to restore full service. We will share the next update on or before 03 May 2026 at 12:26 UTC. Please contact our Help Desk if you have any questions. Thank you for your understanding.
May 3, 08:30 UTC
May 2, 2026

No incidents reported.

May 1, 2026
Cirium products outage
Resolved - We experienced a short access and entitlement service outage today, 1st May, from approximately 11:50 to 12:15 UTC. The outage affected multiple products, including but not limited to Fleets Analyzer, Values Analyzer, and Dashboard. The service has been restored and all products are fully operational. We apologize for any inconvenience caused by the outage. Please contact our help desk with any questions
May 1, 12:45 UTC
Apr 30, 2026
30 April 2026 – Planned Maintenance: Sky Stream Positional Feed
Completed - The scheduled maintenance has been completed.
Apr 30, 17:00 UTC
In progress - Scheduled maintenance is currently in progress. We will provide updates as necessary.
Apr 30, 13:00 UTC
Scheduled - We will be performing an upcoming maintenance window scheduled by one of our data providers. As a result, the Sky Stream Positional feed is expected to experience a degraded level of service, with possible intermittent interruptions to the feed during this period. This maintenance is scheduled to take place on 30 April 2026 from 13:00 to 17:00 UTC. Our team will continue to closely monitor the behaviour of the stream and will provide updates should any unexpected issues arise. Thank you for your understanding.
Apr 17, 08:47 UTC
Apr 29, 2026
Weekly Scheduled Maintenance - Flights Data Processing system
Completed - The scheduled maintenance has been completed.
Apr 29, 12:00 UTC
In progress - Scheduled maintenance is currently in progress. We will provide updates as necessary.
Apr 29, 10:00 UTC
Scheduled - We will be performing scheduled maintenance of our Flights Data Processing system on Wednesday 29th April from 10:00 to 12:00 UTC. During this period, the system will undergo a series of routine maintenance tasks. Users of services that surface flights data may experience degraded performance or interruptions. Please contact our help desk with any questions.
Mar 24, 17:16 UTC
Apr 28, 2026
Scheduled Quarterly Maintenance - Cirium Sky API Platform - 28th April 2026
Completed - The scheduled maintenance has been completed.
Apr 28, 13:00 UTC
In progress - Scheduled maintenance is currently in progress. We will provide updates as necessary.
Apr 28, 09:00 UTC
Scheduled - We will be performing maintenance to the new Cirium Sky API platform on Tuesday 28th April, from 09:00 to 13:00 UTC. During this period, the service will undergo a series of maintenance tasks and upgrades. No extended downtime is expected, but some unavailability or reduced performance of Cirium Sky APIs may be experienced during the maintenance window. This maintenance does not affect the Flightstats (Flex) or Laminar Data Hub API services. Please contact our Help Desk if you have any questions.
Mar 11, 10:58 UTC
Apr 27, 2026
Flight Data Acquisition System Maintenance
Completed - The scheduled maintenance has been completed.
Apr 27, 11:00 UTC
In progress - Scheduled maintenance is currently in progress. We will provide updates as necessary.
Apr 27, 09:00 UTC
Scheduled - We will be performing system maintenance on one of our flight data providers. There is a small possibility of a very brief, minor degradation in flight status updates affecting the Cirium Sky Stream system around Monday, 27 April, between 09:00 and 11:00 UTC.
Apr 24, 15:45 UTC
Apr 26, 2026

No incidents reported.

Apr 25, 2026
Sky Warehouse Redshift Data Delay – 23 April 2026 - 24 April 2026
Resolved - This incident is now resolved and we will continue to monitor if any issue arises.

Thank you for your patience.

Please let us know if you have any questions.
Apr 25, 03:44 UTC
Monitoring - A fix has been implemented and we are monitoring the results.
Apr 25, 01:07 UTC
Update - Our Engineers have applied the fix to production and we have verified that it is working. Additionally, our Engineers have also backfilled the tables till now. The data in Redshift is now up to date.

We will continue to monitor the situation and provide an update once we identify that the situation is fully resolved.

Thank you for your continued patience.
Apr 25, 01:06 UTC
Update - Our engineers had completed the backfill till 24 Apr 22:00.

Thank you for your patience while we work to fully resolve this issue.
Apr 24, 23:47 UTC
Update - We are continuing to work on a fix for this issue.
Apr 24, 19:01 UTC
Update - We are currently investigating an ongoing issue impacting the availability of data for a subset of scheduled processing during the period between 23 April 08:00 and 24 April, approximately 16:30 (UTC). Restoration activities are underway, and reprocessing has been completed for workloads affected during this timeframe. Data generated after approximately 16:30 (UTC) is still in the process of being restored and may not yet be visible.

A fix has been applied, and we are actively validating the solution. Additional reprocessing is planned today, and we will provide an update on expected run timing by 22:00 UK time.
We will continue to share updates as progress is made.

Thank you for your patience while we work to fully resolve this issue.
Apr 24, 19:01 UTC
Update - We are continuing to work on a fix for this issue.
Apr 24, 19:00 UTC
Update - We are continuing to work on a fix for this issue.
Apr 24, 18:59 UTC
Identified - We’re currently experiencing a data ingestion issue affecting Cirium Sky™ Warehouse customers using Redshift. From 23 April 2026 at 08:00 GMT to 24 April 2026 at 16:00 - 16:30 GMT new data stopped being published to all Redshift tables, resulting in stale data across affected services. Customers relying on this data for airline and airport operations, analytics, and logistics may be impacted.

Our engineers have started manual backfilling, and data is gradually becoming available again. The team is working on backfilling each table, hence the data will be available gradually, investigating the underlying root cause, and closely monitoring new runs to ensure data updates resume as expected.

The data post on 24 April 2026 at 16:30 GMT is yet to be available in Redshift. Our Engineers Plan to run the hourly DAGs again today and will provide an update on the run timing by 22:00 GMT

We sincerely apologize for any inconvenience caused. An update will be provided once completed.
Apr 24, 14:19 UTC
Apr 24, 2026
Apr 23, 2026

No incidents reported.

Apr 22, 2026
Weekly Scheduled Maintenance - Flights Data Processing system
Completed - The scheduled maintenance has been completed.
Apr 22, 12:00 UTC
In progress - Scheduled maintenance is currently in progress. We will provide updates as necessary.
Apr 22, 10:00 UTC
Scheduled - We will be performing scheduled maintenance of our Flights Data Processing system on Wednesday 22nd April from 10:00 to 12:00 UTC. During this period, the system will undergo a series of routine maintenance tasks. Users of services that surface flights data may experience degraded performance or interruptions. Please contact our help desk with any questions.
Mar 24, 17:15 UTC
Scheduled Maintenance - Trips Data Services - 22nd April 2026
Completed - The scheduled maintenance has been completed.
Apr 22, 08:30 UTC
In progress - Scheduled maintenance is currently in progress. We will provide updates as necessary.
Apr 22, 04:30 UTC
Scheduled - We will be performing maintenance to our Trip Data Services on 22nd April from 04:30 to 08:30 UTC. During this period, the platform will undergo a number of critical upgrades. No extended downtime is expected, but some unavailability or reduced performance may be experienced during the maintenance window. Please contact our Help Desk if you have any questions.
Apr 21, 16:47 UTC
Scheduled Maintenance - Flightstats and Cirium Sky Alerts APIs - 22nd April 2026
Completed - The scheduled maintenance has been completed.
Apr 22, 06:30 UTC
In progress - Scheduled maintenance is currently in progress. We will provide updates as necessary.
Apr 22, 05:30 UTC
Update - We will be undergoing scheduled maintenance during this time.
Apr 21, 16:50 UTC
Scheduled - We will be performing critical maintenance on the Flightstats and Cirium Sky Alerts APIs on 22nd April, 05:30 to 06:30 UTC. During this period, the service will undergo a database upgrade. There is the potential for a short period of alert delivery disruption during the maintenance window. Please contact our Help Desk if you have any questions.
Apr 21, 08:46 UTC
Apr 21, 2026

No incidents reported.

Apr 20, 2026

No incidents reported.

Apr 19, 2026

No incidents reported.

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