Last spring, former Philly resident George Zengcofounded flight tracking startup Moonfish, which helps travelers find deeply discounted airfare flying out of their preferred airports — launching first with flights from Philadelphia International Airport.

Zeng — a Wharton School alum who spent four years at Facebook — and the rest of the nine-person team is now either based in the Bay area or works remotely. About a year after launch, Moonfish services about 20 cities, Zeng said.

While at Wharton, Zeng built and later sold a Dreamit-backed company called Aircare, a patient engagement platform. Now, he and the Moonfish team use a massive data collection and data analytics from sites like SkyScanner and other data sources to find cheap trips.

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