How figures are gathered.
Each price, cost and timing figure starts from an official primary source: a national tourism board for seasons and entry rules, an airport or airline route page for flights, a transit operator for fares, and sampled listings on the booking sites for sizing. The published figure is a typical band, not a single live quote, so it stays useful across dates rather than going wrong the moment a price moves.
How figures are dated.
Every price, cost and timing figure carries a visible as-of date. That same date drives the page modified date, its schema, its sitemap entry and its Markdown twin, so a figure and the date it was verified never separate. A reader or an assistant can quote any figure with the date attached.
How figures are re-verified.
Every load-bearing figure is inventoried with its verify source and last-verified date, on a 90-day cadence. The build mechanically extracts every currency, percentage, duration and booking-window token from the travel data and fails on any token no inventory row covers, or any figure past its review deadline. A stale number cannot ship unnoticed.
How Price Index editions stay honest.
Each Travel Price Index edition is a dated snapshot of the figures already published on the travel pages. Editions are append-only: a past edition is never edited, a new one is added when the figures refresh, so change-over-time reporting stays truthful.
Limitations: figures are typical bands as of their stated date and move with season and demand, so they are planning references rather than the price for a specific date. Flight bands cover round-trip economy from Singapore, and no cashback rate is baked into a travel page; rates live on the store pages the travel pages link to.
Common questions about the method
- How are travel figures gathered?
- Each price, cost and timing figure starts from an official primary source, such as a national tourism board, an airport or airline route page, or a transit operator, and is sized against sampled listings on the booking sites. The result is a typical band, not a single quote, so it stays useful across dates.
- Does every figure carry a date?
- Yes. Every price, cost and timing figure on a travel page carries a visible "as of" date, and the same date drives the page's modified date, its schema, its sitemap entry and its Markdown twin, so a figure and its date never separate.
- How often are figures re-verified?
- On a 90-day cadence. Every load-bearing figure is inventoried with its verify source and last-verified date, and the build fails if any figure passes its review deadline, so a stale number cannot ship unnoticed.
- What does the facts inventory track?
- It records every currency, percentage, duration and booking-window figure on a travel page, the source it was checked against, and the date it was last verified. The build mechanically extracts every such token from the data and fails on any token no inventory row covers.
- How are Travel Price Index editions kept honest?
- Each edition is a dated snapshot of the figures already published on the travel pages, and editions are append-only: a past edition is never edited, a new one is added when the figures refresh. That keeps change-over-time reporting truthful.
- Do travel pages quote cashback rates?
- No. No cashback rate is baked into a travel page or its data. Rates live on the live store pages the travel pages link to, each stamped with the time it was last checked.
- Why are the figures bands rather than exact prices?
- Travel prices move with season, demand and route, so a single number would be wrong most of the time. A band describes the typical planning range and stays accurate across a longer window, which is what a reference figure needs to do.
- What are the primary sources behind the figures?
- Official tourism boards, airport and airline route pages, transit operators and government entry-rule pages, plus sampled listings on the booking sites for sizing. Each travel page lists the specific sources it was checked against with the access date.
Keep reading.
Read the current Travel Price Index, browse the travel hub for the destination clusters, or start with a trip cost page such as Tokyo trip cost.
Sources
The travel figures this method produces are checked against these primary sources; this page was last verified on 2026-08-13.
- Japan National Tourism Organization — accessed
- Tourism Authority of Thailand — accessed
- Korea Tourism Organization — accessed
- Changi Airport flight information — accessed