SIN · Singapore · Terminal T3
Singapore Airlines Check-in at Singapore Changi Airport
Singapore Airlines departs from Terminal T3 at Singapore Changi Airport. Online check-in opens 48h before departure.
Singapore Airlines check-in rules at SIN
Step-by-step at Singapore Changi Airport
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Check in online
Open the Singapore Airlines app or website 48 hours before departure. Save the boarding pass to your phone wallet.
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Arrive at Terminal T3
Singapore Airlines flights at SIN depart only from Terminal T3. Allow 120 minutes from arrival to gate.
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Drop off bags at T3 main check-in hall
Bag-drop 3 hours before departure, closes 60 minutes before departure. Self-service kiosks available.
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Clear security
Submit your wait time on the airport page above to help others. Standard liquids rule: 100 ml in a single transparent bag.
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Walk to gate T3 gates A1–A21
Allow 5–15 minutes from security to your gate. Boarding starts 45 minutes before departure; gate closes 20 minutes before.
Boarding Singapore Airlines at SIN
Terminal T3 notes
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Typical gates
Singapore Airlines flights typically depart from gates T3 gates A1–A21.
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Walk time
Expect 5–15 minutes from security to the furthest gate.
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Eat & shop
T3 has extensive duty-free, multiple restaurants, and access to the Jewel complex (free, landside). Sky Train connects to other terminals.
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Lounges
SilverKris Lounge (Business + KrisFlyer Elite Gold), The Private Room (First/Suites only). Both at T3.
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Family / accessibility
Family check-in lane at T3 main hall. Stroller drop at gate. Children's play area between gates A6 and A8.
Known issues at SIN with Singapore Airlines
Star Alliance codeshare check-in
Problem: SQ codeshares with United, Lufthansa, ANA. Online check-in must be done with the operating carrier, not the marketing carrier.
Solution: Look at 'Operated by' on your booking. If it says 'United', use united.com. Only SQ-operated flights check in via singaporeair.com.
T3 gates A1 vs A21
Problem: T3 is long; the walk from security to far A21 gates takes 12–15 minutes including travelator.
Solution: Allow 90 minutes total at SIN. Gate is announced at boarding pass; verify on screens after security.
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