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Security report for united.com

United Airlines · Transportation · United States

Partial score · DNS & email only

61/100

0–100, higher is better. How it is calculated

United Airlines operates as a major American airline providing passenger and cargo air transportation services globally. The website reflects a mature digital presence with a focus on flight booking, travel information, and customer service. It targets both leisure and business travelers, positioning itself as a leading airline in the US and worldwide. The technical infrastructure leverages modern JavaScript frameworks such as React, and integrates advanced analytics and optimization tools like Optimizely and Dynatrace, indicating a high level of digital maturity. Security posture is strong with HTTPS enforcement, comprehensive security headers, and no visible vulnerabilities. Privacy compliance is well addressed with clear policies and consent mechanisms. Overall, the website demonstrates a professional, trustworthy, and user-friendly experience aligned with enterprise standards.

Scanned

NIS2 and GDPR posture

GDPR outside view
35/ 100 · High
Checks completed
6of 7

NIS2 Art. 21(2)

  1. (a) Risk analysis and security policies: Not visible from outside
  2. (b) Incident handling: One indicator
  3. (c) Business continuity, backups and crisis management: Not visible from outside
  4. (d) Supply chain security: Not visible from outside
  5. (e) Secure acquisition, development and maintenance, including vulnerability handling: Partly checked
  6. (f) Assessing the effectiveness of security measures: Not visible from outside
  7. (g) Cyber hygiene and security training: Not visible from outside
  8. (h) Cryptography and encryption: Partly checked
  9. (i) HR security, access control and asset management: One indicator
  10. (j) Multi-factor authentication and secured communications: Not visible from outside

This scan rated NIS2 with an earlier keyword method that is no longer shown; rescan for the per-article view. Risk management, continuity, supply chain, training, MFA, management oversight (Art. 20) and incident reporting (Art. 23) need internal evidence, and Guard cannot tell whether NIS2 applies to this organisation.

GDPR is indicative only, based on publicly visible signals: Articles 7, 12, 13 and 32 of Regulation (EU) 2016/679 and Article 5(3) of the ePrivacy Directive. Not a certification or legal assessment.

Priority findings

5 findings rated critical or high. Fix these first.

  1. SSL/TLS

    TLS encrypts the connection and proves the site is really yours. Weak or expiring certificates trigger browser warnings and put traffic at risk.

    • Critical

      Unable to retrieve SSL certificate

      Could not establish secure connection to retrieve certificate information

      What to do: Check if the server is accessible and SSL/TLS is properly configured

  2. GDPR outside view

    These are the privacy signals visitors and data protection authorities look for under GDPR.

    • High

      No Privacy Policy found

      GDPR requires a clear and accessible privacy policy

      What to do: Add a comprehensive privacy policy page and link to it prominently

    • High

      No Cookie Policy found

      GDPR requires clear information about cookie usage

      What to do: Add a dedicated cookie policy explaining cookie usage and purposes

    • High

      No Cookie Consent Banner found

      GDPR requires explicit consent for non-essential cookies

      What to do: Implement a cookie consent banner that appears on first visit

    • High

      Third-party services without privacy policy

      Detected services: Google Ads

      What to do: Document all third-party data sharing in your privacy policy

Need hands-on remediation? Email guard@offseq.com

Keep watching united.com

This scan found 11 issues across 5 checks. Monitoring re-runs those checks daily, emails you when something material changes and records each fix, so you can show progress.

Daily monitoring

Recommended

€25per month

  • TLS certificates and expiry
  • DNS records
  • SPF, DKIM and DMARC
  • Security headers
  • GDPR and NIS2 posture
  • Exposed services
  • Third-party trackers
  • Security score drift

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Results by check

Each check with its score, findings and the evidence it collected.

How this score is calculated

The security score runs 0–100, higher is better. It is the plain average of the security checks that completed in this scan, each counted equally. A check that could not run is left out: it counts neither as a pass nor as a fail.

Counted in this score

SSL/TLS
0
Email security
85
DNS health
85
Network security
100
GDPR outside view
35
Average
61

Not counted

  • Security headers: did not complete in this scan.
  • NIS2 outside view: Re-weights evidence from the TLS, email, DNS, network and hygiene checks, so counting it would count that evidence twice. Shown on its own.
  • OffSeq Observations: An AI reading of the site, useful context but not reproducible evidence. Shown on its own.

Findings that cap the score at 49

Each of these is serious on its own, so while any is present the site cannot rate better than high risk, however good the other checks are.

  • The certificate is not trusted by browsers
  • The website is not served over HTTPS
  • A database, remote desktop, file-sharing or Telnet service is reachable from the internet
  • The page loads a script from a compromised source
  • The domain registration has expired
  • SPF authorises every server to send mail as the domain

Partial scans

When the site blocks Guard or most checks cannot run, the score covers only the checks that ran (usually DNS and email), is capped at 75 and is shown as partial, without a risk level.

Risk levels

  • Critical0–25
  • High26–49
  • Medium50–75
  • Low76–100

Technical appendix

Business context, site observations and technical notes gathered during the scan, and the standards behind each reference.

Business context

Business profile

United Airlines holds a significant market position as one of the largest US airlines, operating under United Airlines Holdings, Inc. The business model centers on passenger air travel and cargo services, supported by loyalty programs and ancillary services. The website's content and structure support a broad customer base including individual travelers and corporate clients. The presence of multiple analytics and marketing tools suggests a data-driven approach to customer engagement and conversion optimization. The domain's WHOIS data is unavailable likely due to privacy protection, which is justified for a large enterprise. The company maintains consistent branding and provides clear contact channels, reinforcing credibility and customer trust.

Security posture

The website exhibits a mature security posture with enforced HTTPS, multiple security headers, and no exposed sensitive data. The use of modern frameworks and third-party analytics is balanced with privacy compliance measures. However, the absence of a dedicated security policy or incident response page and lack of a security.txt file represent areas for improvement. No vulnerabilities or suspicious patterns were detected in the publicly accessible content. The security score is high, reflecting good practices but with room for enhanced transparency and incident readiness.

Recommendations

  1. Publish a dedicated security policy page outlining security practices and commitments.
  2. Provide explicit incident response contact information, including abuse and security email addresses.
  3. Implement and publish a security.txt file to facilitate responsible vulnerability disclosure.
  4. Regularly review and audit third-party scripts and analytics tools for security and privacy compliance.
  5. Enhance visibility of data protection officer contact details to strengthen GDPR compliance transparency.

Contact details published on the site

Addresses
Legal name
United Airlines, Inc.
Site observations

Automated reading of the public site. Ratings are indicative.

Business

Company
United Airlines
Description
United Airlines is a major American airline providing passenger and cargo air transportation services worldwide.
Key services
Passenger air travel, Cargo shipping, Flight booking and management, MileagePlus loyalty program
Content quality
excellent
Branding
consistent

Technology

Stack
React, JavaScript, Optimizely, Dynatrace, Google Adsense
Frameworks
React
Platforms
Web
Performance
fast
Mobile
excellent
Accessibility
good
SEO
good

Security

Observed score
90/100
Good practices seen
  • HTTPS enforced
  • Security headers present
  • No exposed sensitive data in HTML
  • Use of modern JavaScript frameworks

Analytics and tracking

Services
Quantum Metric, Dynatrace, Optimizely
Tracking level
extensive
Privacy practices
good

Advertising

Ad networks
Google Adsense
Tracking pixels
Optimizely, Quantum Metric, Dynatrace, Tealium
Marketing tools
Optimizely, Dynatrace, Tealium
Transparency
good

Site quality

Design
excellent
User experience
excellent
Content relevance
excellent
Navigation
excellent
Professionalism
excellent
Trustworthiness
high

Key observations

  1. Website is fully accessible with no blocking or WAF challenges.
  2. Content is professional, comprehensive, and consistent with a major airline.
  3. Strong use of modern web technologies and analytics tools.
  4. Good privacy and cookie policy presence with consent mechanisms.
  5. No exposed sensitive information or security vulnerabilities detected.
  6. WHOIS data unavailable, likely due to privacy protection, but domain is well-known and trusted.
Technical notes

Notes

The website is built on a modern tech stack including React and integrates advanced analytics and optimization platforms such as Optimizely, Dynatrace, and Quantum Metric. Hosting appears to be via Akamai CDN, supporting fast global delivery and performance. The site is well optimized for mobile devices and accessibility, with proper meta tags and SEO best practices. The technical implementation supports a seamless user experience with fast loading times and robust infrastructure. Opportunities exist to improve technical documentation of security policies and incident response mechanisms to reduce operational risk.
Standards and sources

Reference chips under each finding point to the standard, regulation or specification the finding relates to. They are taken from the official datasets below and mapped conservatively: a finding with no defensible link shows none. NIS2 and GDPR references mark where a finding is relevant evidence, not a compliance verdict. Implementing Regulation (EU) 2024/2690 binds digital infrastructure and digital service providers; for other entities it is the most detailed public reading of the Article 21 measures. WCAG, EN 301 549, European Accessibility Act and Web Accessibility Directive references name the requirement an automated accessibility rule relates to; they are not a conformance verdict.

Retrieved 2026-10-25

Earlier scans of this domain

  1. 64/100Medium20 findings · partial scanView report
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