Blasphemy aside

p), this may have bigger effects than people think, at least in the short term. Zep travel in the 20's and 30's, due to the ships' low ceiling and susceptibility to weather and wind patterns (but without the early airplanes' dangerous vulnerabilities to them), proved a major OTL pathfinder for Transatlantic travel by being the first to detail the Atlantic air weather. This played a very important role in establishing viable Transatlantic air travel by the 30s. Without the Zep co. weather maps we may see Transatlantic flight delayed a decade or more as airplanes contend with establishing these in a much more risky manner. Transoceanic passenger air travel is definitely delayed, possibly even to the 50s.
There's some detail on the role of Zeps in weather mapping
here in the Smithsonian Mag.