Methodology & data limitations

A data-journalism tool showing fares observed from permitted sources. It is not a booking service and not a complete measure of the market.

Fares are compared only with fares at the same booking horizon (days between observation and departure), grouped into 60, 45, 30, 21, 14, 7, 3 and 1 days.
Direct and connecting flights are never mixed; unknown stop counts are excluded rather than assumed direct.
Cabin classes, trip types and materially different fare inclusions are never mixed.
Fares are stored in INR. The USD view is a display conversion at the European Central Bank reference rate, with the rate and its date shown on the page.

At least 5 comparable observations before any minimum, median or maximum is shown.
At least 8 distinct observation days before a percentage change is shown.
At least 30 observations per horizon before booking-window conclusions are published.
Missing data is shown as missing, never as zero, and prices are never estimated or back-filled.

Indexed charts set the first date with data in the selected window to 100 and state that baseline date on the chart.

Cached fares from aggregators reflect what users recently searched, not every flight or fare class, and can be days old.
Routes with little search activity may have sparse or no data.
Price changes are reported, not explained. We do not attribute them to fuel, demand or holidays without evidence.
History begins from the day collection started; we do not reconstruct earlier prices.