Website readiness profile · Snapshot 23 October 2026

costcotravel.ca

costcotravel.ca's public homepage, certificate and DNS checked against 31 practices and compared with 478 Travel Bookings & Trip Planning sites.

Readiness index: 56/100
Ahead of: 16%
Practices observed: 15/31
Popularity band: Top 50K

Measured 2026-10-23 11:41:41 UTC from one location. How we measure

Readiness by lane

Green: costcotravel.ca. Thin bar: Travel Bookings & Trip Planning peer median.

Enable

56/100

Peers 86

Harden

69/100

Peers 60

Accelerate

38/100

Peers 64

Recover

0/100

Peers 13

Priority fixes for costcotravel.ca

Ordered by impact and by how common each practice is among peers.

Priority 1 · Harden
TLS 1.3 negotiated
Observed: The TLS connection negotiated TLSv1.2.
Why it matters: TLS 1.3 removes legacy cipher suites and completes the handshake in fewer round trips, so it is both safer and faster for new connections.
What to do: Enable TLS 1.3 on your CDN or server. Keep TLS 1.2 available for older clients unless you have checked your audience.
92% of Travel Bookings & Trip Planning peers do this. Limit: Certificate and protocol were observed from one vantage point; CDNs can present different certificates by region.
Guide: HTTPS and TLS Guide for Website Owners
Priority 2 · Enable
XML sitemap discoverable
Observed: No sitemap was listed in robots.txt or found at /sitemap.xml.
What to do: Generate an XML sitemap of canonical URLs, reference it in robots.txt and submit it in Google Search Console.
83% of Travel Bookings & Trip Planning peers do this.
Guide: XML Sitemap Guide: Include Only URLs You Stand Behind
Priority 3 · Accelerate
Static files cached for 30 days or more
Observed: A same-site stylesheet or script was cacheable for 0 seconds, short of the 30-day benchmark.
What to do: Give versioned (fingerprinted) CSS, JavaScript, fonts and images Cache-Control: public, max-age=31536000, immutable, and change the file name whenever the content changes.
49% of Travel Bookings & Trip Planning peers do this.
Guide: Browser Caching Guide for Website Owners
Priority 4 · Accelerate
Modern image formats in use
Observed: The homepage had 69 images and none used WebP or AVIF.
What to do: Serve WebP or AVIF with a JPEG or PNG fallback, either through an image CDN or by generating both formats at build time.
41% of Travel Bookings & Trip Planning peers do this.
Guide: AVIF, WebP, JPEG, and PNG: Choose the Right Image Format

What costcotravel.ca already does well

Practices fewer than half of Travel Bookings & Trip Planning peers use.

Content Security Policy presentContent-Security-Policy present.30% of peers
Referrer-Policy setReferrer-Policy present.32% of peers
HSTS kept for at least a yearHSTS with a 365-day max-age covering subdomains.46% of peers

What we saw

Homepage checked: https://www.costcotravel.ca/
Homepage response: HTTP 200
TLS: TLSv1.2, HTTP/2
Certificate: DigiCert, 364-day validity, expiring 2026-11-16
CDN or edge: Akamai
DNS operators: Akamai Edge DNS
HSTS: max-age 365 days, includeSubDomains
DMARC policy: p=reject
Homepage HTML: 372 KB, gzip
Images on homepage: 69 (svg 55, png 6, gif 5, jpg 2)

Limits: homepage only, one location, one moment. Header checks reflect the homepage response; other pages may differ.

Stack and providers

Seen in the homepage response, certificate and DNS. Provider pages compare how their customers configure the same checks.

Akamai (cdn and edge platform)Akamai Edge DNS (dns operator)DigiCert (certificate authority)Service guide: Akamai

All 31 checks

Select a gap for the method and fix. How each check works

Not observed 16

Observed 15

HTTP requests move to HTTPS
HSTS kept for at least a year
Certificate has more than 14 days left
DMARC policy enforces quarantine or reject
X-Content-Type-Options: nosniff
Framing restricted
Content Security Policy present
Referrer-Policy set
HTTP/2 negotiated
HTML compressed
robots.txt published
Meta description written
Mobile viewport configured
Page language declared
At most one redirect to the homepage

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Live status for this site: Status Is Down: costcotravel.ca. This profile covers configuration only.

Compare with other Travel Bookings & Trip Planning sites

Travel Bookings & Trip Planning readiness benchmark