The best alternatives to JetHop are Jetradar, Blade, and Travel Score. If these 3 options don't work for you, we've listed a few more alternatives below.
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Universal-2 by AssemblyAI— Speech-to-Text API for conversational data
virail is a transport metasearch like Skyscanner for flights, but includes all different means (trains, buses, car sharing and flights), fetching live data for a number of travel companies, embedding in a single listing result set.