What it is
Spotting a cheap flight is easy; knowing whether it's actually abnormal is the hard part. Outlier watches the routes you pick and scans fares for abnormal pricing using a comparative scoring model — every offer is measured only against genuinely similar ones, same cabin, trip type and booking window, so economy never gets compared to business.
When something comes in unusually low it tells you why it scored that way, and what pulled the score down: too few data points, a stale offer, a hidden self-transfer. It pulls from airline APIs on a slow schedule rather than scraping.
How it works
Like-for-like scoring
Offers are compared only against genuinely similar ones — same cabin, trip type and booking window — so economy never gets measured against business.
It shows its work
Every alert explains the score, including what weakened it: thin data, a stale offer, or a hidden self-transfer.
APIs, not scraping
Fares come from airline APIs on a deliberately slow schedule instead of scraped pages.
Built with
TypeScript · Next.js · Prisma · PostgreSQL · Amadeus / Duffel
· Data / full-stack web application — built by Musa Alanssari, a software engineer in Houston, Texas. Mar 2026.
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