#freshness

Design TTL, event invalidation, stale-while-revalidate and live-reprice boundaries for hotel and flight pricing.

Model travel pricing as timestamped observations and change events instead of only overwriting mutable current-price state.

Compare push, pull and hybrid distribution models across freshness, latency, rate limits, caching, reconciliation and operational ownership.

Compare Skyscanner Flights Live Prices and Indicative Prices across freshness, use case, latency, booking confidence and rate limits.

Diagnose stale hotel offers and delayed feeds using freshness timestamps, ingestion lag, cache state and invalidation evidence.

Design travel-metasearch caching with realistic search load, adaptive TTLs, selective live rechecks, stale-price risk, observability and production trade-offs.