Traditionally Duty free would be 1litre and downtown, supermarkets etc would be 70cl but its not always the case any more. Plus then the local complexity. UK out of the EU for example is cheaper. UK price EU price.

Thanks Larry and Ihsan, It would be great to see if we could evolve it to inflight. Some of my recent flights onboard pricing was considerably cheaper than in the airport. The issue with inflight in my experience is stock not always being available s... show more

Thanks for the feedback Ian. I think once we add more categories against this pilot in airports. comparing Is Duty Free still good value against the Supermarkets / liquor stores would be good insight.

I run Echolution, a travel-retail media and data agency, and we've just launched a live Duty-Free Price Index comparing spirits prices across 15 major hub airports (the world's 10 busiest plus key European travel-retail hubs) normalised into USD/EUR/GBP... show more