Complex sentence: The city has an Airport (IATA: JGA--ICAO: VAJM) with direct flights to Mumbai and a railway station (with the Indian Railways code JAM) to a variety of destinations across India.
Split into simpler sentences: The city has an Airport (IATA: JGA--ICAO: VAJM) with direct flights to Mumbai. Jamnagar has a railway station (with the Indian Railways code JAM) to a variety of destinations across India.