When big names like KLM and Air France make headlines, it's usually not a cause for concern – unless it's about a data leak. That's exactly what has happened: The two renowned airlines recently had to admit to a security problem that originated with an external service provider. Thousands of customer data are affected, including sensitive information such as addresses, phone numbers, and travel details.
What's behind the incident – and how can customers better protect themselves in the future?
What happened?
According to the airlines, an external customer service provider, who among other things handled support inquiries related to the Flying Blue frequent flyer program, was attacked. Personal data was illegally accessed. Although no payment data or passwords were affected, names, email addresses, phone numbers, and travel data were compromised – an attractive target for future phishing attacks.
KLM and Air France have already informed affected customers by email and stated that they are working closely with security authorities. Nevertheless, a bitter taste remains: While the airlines themselves were not directly the target, customer trust has suffered.
Why are external service providers a security risk?
More and more large companies are outsourcing customer service, accounting, or IT – often to service providers at home or abroad. These companies are contractually bound, but security standards vary greatly. A single error, an outdated server, or an unprotected API can be enough to offer attackers a gateway.
As a customer, you rarely notice this. You contact the airline – but in the background, the service runs through third parties. This is exactly what happened in this case.
Which data is affected?
According to the airlines, the following data was compromised, among others:
- First and last name
- Email address
- Phone number
- Frequent flyer number (Flying Blue)
- Itinerary and travel dates
This information is sufficient to launch targeted phishing attacks – for example, in the form of supposed flight change emails or bonus promotions that actually contain malware.
Am I affected?
If you have booked with KLM, Air France, or through the Flying Blue program in recent years, you should check your email inboxes. The airlines have informed affected individuals directly. Look out for emails from "no-reply@klm.com" or "support@airfrance.com".
Even if you have not received a message, it may be advisable to update your customer data – and to protect yourself preventively.
5 concrete tips for protecting your data
Even if you couldn't directly prevent anything – with a few simple measures, you can better secure yourself in the future:
1. Change passwords regularly
Never use the same password for multiple services – especially not for email, flight portals, and online banking. Change your passwords every 3 to 6 months. Tools like password managers (e.g., Bitwarden or KeePass) can help.
2. Choose strong passwords
"Vacation2024" or "KLM123" are not secure passwords. Better: a mix of uppercase and lowercase letters, numbers, and special characters. Example: "D@taS!cure2025_KLM".
3. Use two-factor authentication
Many portals – including airlines – offer an additional layer of protection. In addition to your password, you enter a code sent to you via an app or SMS. This protects your data even if the password becomes known.
4. Recognize and delete phishing emails
Never click on links in suspicious emails – even if they seemingly come from the airline. Always check the exact sender address and look out for typos or requests to disclose personal data.
5. Regularly check flight portals and frequent flyer accounts
Log in to your customer accounts and check stored data. Remove old payment methods, outdated addresses, or inactive bonus cards. The less stored there, the lower the risk.
What does this mean for the future?
The incident at KLM and Air France shows how sensitive our travel data is – and how easily it can fall into the wrong hands through detours. Even reputable companies are not immune to security vulnerabilities when they collaborate with third-party providers.
For us as consumers, this means: Not only pay attention to the brand, but also to how personal information is handled. Those who fly regularly should secure their accounts and check their own data once too often rather than too little.
Conclusion: Security starts with yourself
Whether you're a frequent flyer or an occasional traveler – data security should be routine for everyone. With the right measures, you can protect yourself, even if large companies fail to close all gaps.
The KLM/Air France case is a wake-up call – and an opportunity to improve your own digital hygiene.
