By SkytrainYou can travel between Terminals 1, 2, and 3 via the complimentary Skytrain service in the transit area.
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Singapore's Changi Airport has four terminals. T1, T2 and T3 are all interconnected, which means you can go anywhere within those three terminals after immigration via walking or by the free Skytrains. This opens up opportunities to go shopping at more stores or go lounge-hopping.
By Shuttle BusThe shuttle bus journey between terminals at the public area takes about 10 minutes and the shuttle bus journey between terminals at the transit area takes between 10 to 18 minutes.
The recommended layover time for international flights is generally longer, as you will have to go through customs and immigration before boarding your next flight. In most cases, a 30-minute layover for domestic flights and an hour for international flights is considered a minimum, or short, layover.
Before the opening of Terminal 3, the Skytrain system was upgraded from the original Adtranz C-100 system to the new Mitsubishi Crystal Mover system, which expanded the service from a simple 2-station line to a 7-station network. All Changi Airport Skytrain services are free of charge.
T2 closed for upgrading work in May 2020, when passenger numbers nosedived during the pandemic. The terminal's southern wing reopened in phases in 2022, starting with key touch points such as arrival immigration and baggage claim belts in May, and the departure hall in October.
STL Airport provides a free Terminal Shuttle which runs 24 hours a day between Exit 12 at both terminals. There is no route to walk between terminals at this time. Shuttle ride time is approximately 10 minutes, as Terminal 1 and Terminal 2 are just over one mile apart.
Departure from Changi AirportFor Singapore Airlines flights to other destinations, check-in will remain at Terminal 3. For updates on departure gate and boarding time for your flight, do check the flight information display screens at the Airport.
Skytrain services operate to Terminal 1 (Station C), as well as to Terminal 2 (Station E). Skytrain Station C is located at Terminal 1's west end, next to Gate C1. Skytrain services operate to Terminal 3 (Station B). Passengers heading to Terminal 2 should proceed to Skytrain Station D at the other end of Terminal 1.
On Foot. To move between T1 and T3 within the transit area, use the inter-terminal travellators located throughout the Departure Transit areas. To travel between T2 and T3 in the public area, use the Mezzanine Level link bridge between the two terminals.
Overall, passengers usually have to re-clear security for connecting flights, though there may be some exceptions depending on the airport and flight itinerary. To make this process easier, checking with the airline or airport ahead of time is recommended.
If your itinerary was purchased as one ticket (as in: you have only one itinerary and one confirmation number), and the connection time was too short and you miss the second (or third) flight, you can rest easy, no matter what happens. The airline will simply put you onto the next available flight, free of charge.
You'll need to clear customs and immigration. Next, you'll recheck your luggage for the domestic flight. Finally, you'll need to go through Transportation Security Administration screening. This may include a physical inspection of your luggage and personal items with a metal detector or a full-body scan.