MTR last trains run 12:15-1:00am depending on the line, but Airport Express shuts down earlier around 12:48am from Hong Kong Station. Missing the last Airport Express means either a HK$500+ taxi to HKG or sleeping in the arrivals hall until 5:50am when service resumes.

Tsuen Wan Line (serving Tsim Sha Tsui) runs until 1:00am toward Central, but if you're bar-hopping in Lan Kwai Fong and staying near the airport, that Airport Express cutoff will catch you. Check MTR Mobile app for real-time last train updates — Typhoons and signal problems sometimes trigger early shutdowns without warning.

Learned this the hard way after late drinks in Tsim Sha Tsui. Ran to Kowloon Station at 12:55am only to find Airport Express already finished for the night. Ended up paying HK$520 for a taxi that took 45 minutes in light traffic. Now I set phone alarms for 11:30pm as last-train warning when drinking anywhere beyond walking distance from my accommodation.