Is there an easy way to find out whether a given airport is equipped for passengers to connect between two international flights without passing through the host country's border controls?
Of course one can ask a question here about a particular airport and hope someone who knows it comes by, but that is inconvenient to wait for when one is just in the middle of evaluating proposals from a flight search engine and needs to verify which of them would require additional visas.
The websites of airports themselves tend to be surprisingly unhelpful about this. Presumably the airport operators think it is obvious whether they have airside transit or not (we're the hub for XYZ Airlines, so of course we do / nobody connects here, so of course we don't / we're in the US, so of course we don't).
Wikipedia's articles about each airport are occasionally useful, but coverage is erratic.
Is there a database somewhere? Or someone who is collecting this information in particular?
[In contrast, it is usually reasonably well-publicized whether some nationalities need airside transit visas at airports that have airside transit, just not which exact airports that is.]