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

Flight Data Acquisition System Maintenance Apr 27, 2026 09:00-11:00 UTC

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.
Posted on Apr 24, 2026 - 15:45 UTC

Scheduled Quarterly Maintenance - Cirium Sky API Platform - 28th April 2026 Apr 28, 2026 09:00-13:00 UTC

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.
Posted on Mar 11, 2026 - 10:58 UTC

Weekly Scheduled Maintenance - Flights Data Processing system Apr 29, 2026 10:00-12:00 UTC

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.
Posted on Mar 24, 2026 - 17:16 UTC

30 April 2026 – Planned Maintenance: Sky Stream Positional Feed Apr 30, 2026 13:00-17:00 UTC

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.
Posted on Apr 17, 2026 - 08:47 UTC

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

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
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.

Apr 18, 2026

No incidents reported.

Apr 17, 2026
Failure of Fleets Data Publishing
Resolved - Our engineers have successfully completed the fleets data update. The latest data will be applied to all affected products as per their individual update schedules. An internal RCA is scheduled to fully understand the cause(s) of the recent incidents affecting the Ascend product family, and agree steps to enhance platform resilience.
Apr 17, 11:32 UTC
Investigating - We’re currently experiencing degraded performance issues affecting all products where fleets data is surfaced, including, but not limited to Fleets Analyzer and Cirium Sky™ Warehouse. The overnight data publication failed, resulting in stale data in all affected services. The issue has also meant that no news articles have been published in Dashboard or Pulse since midnight (UTC). Our engineers are working to restore the affected services and address the underlying cause. We sincerely apologize for any inconvenience caused. The next update will be posted on or before 16:30 UTC.
Apr 17, 08:35 UTC
Trip Alerts Delivery Interruption
Resolved - The incident affecting Trip alert deliveries has been resolved. Alerts are being delivered successfully and we are continuing to monitor performance closely. Please accept our apologies for any her disruption caused and contact the Help Desk if you have any questions.
Apr 17, 09:46 UTC
Identified - Our engineering team has identified the root cause, and they are currently addressing the issue. We will provide another update by 09:40UTC on 17th April 2026.
Apr 17, 05:40 UTC
Update - Our engineering team continues to investigate the issue impacting Trip alert delivery We will provide another update by 06:48 UTC on 17th April 2026.
Apr 17, 02:48 UTC
Investigating - We are currently experiencing an issue impacting the delivery of Trip alerts. The issue started at approx. 19:18 UTC today on 16 April 2026 and has been escalated to our engineering team. We will provide a further update by 02:48 UTC on 17 April 2026.
Apr 16, 23:17 UTC
Dashboard and Values Analyzer - Not functioning as expected.
Resolved - Our engineers have identified the root cause of the issue. A fix has been applied to restore normal performance levels. The issue is now resolved.
Apr 17, 05:30 UTC
Investigating - We’re currently experiencing an issue with Dashboard and Values Analyzer. In both services, the page is not functioning as expected. In Values Analyzer, users are unable to run valuation. In Dashboard, no news content is published. Our engineers are working to restore normal performance levels. We apologize for any inconvenience caused. The next update will be posted on or before 05:44 UTC.
Apr 17, 01:51 UTC
Apr 16, 2026
Apr 15, 2026
System Maintenance - Alerts API
Completed - The scheduled maintenance has been completed.
Apr 15, 17:45 UTC
In progress - Scheduled maintenance is currently in progress. We will provide updates as necessary.
Apr 15, 16:45 UTC
Scheduled - We will be performing maintenance today on 2026-04-15 from 16:45 UTC to 17:45 UTC to increase database capacity and improve Alerts API stability. The Alerts API may be temporarily impacted during this window. Please contact our Help Desk with any questions.
Apr 15, 16:44 UTC
Weekly Scheduled Maintenance - Flights Data Processing system
Completed - The scheduled maintenance has been completed.
Apr 15, 12:00 UTC
In progress - Scheduled maintenance is currently in progress. We will provide updates as necessary.
Apr 15, 10:00 UTC
Scheduled - We will be performing scheduled maintenance of our Flights Data Processing system on Wednesday 15th 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, 17:14 UTC
Alerts API Degraded Performance
Resolved - This incident has been resolved.
Apr 15, 03:49 UTC
Monitoring - Our team has identified the cause, and alert delivery has been successfully resumed. We are currently monitoring to ensure ongoing stability.
Apr 15, 02:41 UTC
Identified - We have identified the root cause of the issue and are actively working on a resolution. We will provide another update by 05:47 UTC on 2026-04-15.
Apr 15, 02:32 UTC
Investigating - We are investigating reports of missing alerts from the Alerts API service from approximately 18:18 UTC today on 2026-04-14. We will provide another update by 1:47 AM UTC on 2026-04-15.
Apr 14, 21:53 UTC
Apr 14, 2026
Potential failure of Fleets data publishing
Resolved - Our engineers have successfully completed the fleets data update. The latest data will be applied to all affected products as per their individual update schedules. An internal RCA will be carried out to understand the cause(s) of today's and yesterday's incidents, and steps put in place to enhance platform resilience.
Apr 14, 11:41 UTC
Investigating - We’re currently experiencing degraded performance issues affecting all products where fleets data is surfaced, including, but not limited to Fleets Analyzer and Cirium Sky™ Warehouse. It appears that data was not published overnight on Monday, 13th April, resulting in stale data in all affected services. The issue has also meant that no news articles have been published in Dashboard or Pulse since midnight (UTC). Our engineers are working to restore the affected services and address the underlying cause. We sincerely apologize for any inconvenience caused. The next update will be posted on or before 12:25 UTC.
Apr 14, 08:27 UTC
Schedule Snapshot temporarily unavailable
Resolved - The incident has been resolved and the service is performing as expected.
Apr 14, 11:02 UTC
Investigating - We are investigating an issue affecting the Schedule Snapshot platform. The service returning a server error response. We apologize for any inconvenience caused. The next update will be posted on or before 13:30 UTC.
Apr 14, 09:29 UTC
Apr 13, 2026
No new content published to Dashboard and Pulse on 13th April 2026
Resolved - This incident has been resolved.
Apr 13, 11:57 UTC
Monitoring - New articles are now appearing. We are continuing to investigate the cause and are monitoring performance closely.
Apr 13, 10:41 UTC
Investigating - We are investigating an issue that is preventing the publication of new articles on the Dashboard and Pulse platforms. We apologise for any inconvenience and will provide an update no later than 16:30 UTC.
Apr 13, 08:31 UTC
Fleets and Values Analyzer Auto-Suggest not working
Resolved - This incident has been resolved.
Apr 13, 11:57 UTC
Monitoring - Auto-suggest is now working. We will continue to monitor for a period before considering this incident resolved.
Apr 13, 11:12 UTC
Investigating - We’re currently experiencing degraded performance issues with Fleets and Values Analyzer. In both services, auto-suggest is not working. In Fleets Analyzer, users can work around the issue by using the Filter menu. In Values Analyzer, there is no workaround to create a new generic or specific valuation. Our engineers are working to restore normal performance levels. We apologize for any inconvenience caused. The next update will be posted on or before 14:20 UTC.
Apr 13, 10:20 UTC
No fleets aircraft data published on Sunday, 12th April.
Resolved - This incident has been resolved. We have successfully refreshed the fleets data and this update will flow through to Fleets Analyzer and Cirium Sky™ Warehouse.
Apr 13, 11:56 UTC
Investigating - We’re currently experiencing degraded performance issues with Fleets Analyzer and the Fleets tables in Cirium Sky™ Warehouse. No data was published on Sunday, 12th April, resulting in stale data in both services. Our engineers are investigating. We apologize for any inconvenience caused. The next update will be posted on or before 14:25 UTC.
Apr 13, 10:26 UTC
Apr 12, 2026

No incidents reported.

Apr 11, 2026

No incidents reported.

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