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"I recommend taking the blue Colombo Express Bus from the airport to the city center: it’s the cheapest and easiest option at roughly 500 LKR, departs every 30 minutes between 5:30am and 8:30pm, takes about an hour, and stops at Central Bus Stand, Pettah Fort, and Colombo Fort Station (a taxi would cost around 6,000–9,000 LKR)." - Matthew Kepnes
AC bus to airport, affordable, drops at departure area
WVM4+F8P, Unnamed Road, Colombo, Sri Lanka Get directions