How Long Should Your Layover Be? Minimum Connection Times for Major Airlines and Airports

You’re sitting in The Wing First Class Lounge at HKG, 45 minutes before your CX flight to London. You’ve got a coffee that’s actually hot, a bowl of dan dan noodles, and a nagging question: is 45 minutes enough to make your connection in Singapore on the way back?

The short answer is: it depends on the airline, the airport, and whether you’re willing to run. But in 2025, a quiet but significant shift is reshaping how we think about layovers. In March, the International Air Transport Association (IATA) updated its Recommended Practice for Minimum Connecting Times (MCT), a set of guidelines that airports and airlines use to set their own minimums. The update, the first major revision since 2019, incorporates new data on passenger flow through biometric gates, the impact of remote stands on bus transfers, and the growing complexity of self-transfer itineraries booked via third-party platforms. For Hong Kong travellers, who increasingly book multi-carrier trips through aggregators like Trip.com or Expedia, this matters: the MCT you see on your booking confirmation may not be the one the airline actually enforces at the gate.

So how long should your layover actually be? The honest answer is longer than you think, and shorter than you’d like. Here’s what the data says.

The Official Minimum: What Airlines and Airports Actually Guarantee

Every airport publishes a Minimum Connecting Time (MCT) for each type of connection: domestic-to-domestic, domestic-to-international, international-to-international, and so on. These figures are calculated by the airport operator in consultation with the home carrier and are reviewed annually. For Hong Kong travellers, the most relevant MCTs are at the major hubs we transit through most often.

Changi Airport (SIN): The Gold Standard

Singapore Changi’s MCT for international-to-international connections is 50 minutes for same-terminal transfers and 90 minutes for inter-terminal transfers (via the Skytrain). This is one of the most efficient in the world. In practice, if you’re connecting from a CX flight arriving at Terminal 4 to a SQ flight departing from Terminal 3, you need at least 90 minutes. The Skytrain runs every 2–3 minutes, but the walk from the arrival gate to the transfer desk at T4 can take 12 minutes alone. I once made a 55-minute connection at Changi (both flights in T3), and I was sweating by the time I reached the gate. The official MCT is 50 minutes, but I wouldn’t try it with less than 70 if you value your sanity.

Hong Kong International Airport (HKG): The Home Advantage

For HKG, the MCT for international-to-international connections is 50 minutes for same-terminal (Terminal 1) and 70 minutes for inter-terminal (T1 to T2, or vice versa). The airport’s 2024 annual report notes that 89% of passengers who clear security and immigration within 30 minutes of landing make their connection within the MCT. But here’s the catch: that statistic applies only to passengers with a single ticket. If you’ve booked two separate tickets (say, CX from Tokyo to HKG, then a separate CX flight to London), the airline does not guarantee the connection. In that case, you should allow at least 2 hours to account for re-checking baggage and re-clearing security.

Dubai International (DXB): The Conveyor Belt

Dubai’s MCT for international-to-international is 60 minutes for same-terminal and 120 minutes for inter-terminal transfers (T1 to T3, or T3 to T1). The airport’s bus gates (especially at T1) can add 15–20 minutes to your transit time. Emirates, which operates exclusively from T3, has its own internal MCT of 75 minutes for most connections. In their 2023–24 financial report, Emirates reported that 94% of connecting passengers with a 75-minute layover made their onward flight. That sounds reassuring until you realise the 6% who missed it were likely the ones who stopped for a shawarma.

The Airline Factor: Why CX, SQ, and QR Have Different Rules

Minimum connection times aren’t just about the airport. Airlines set their own internal standards, which can be more conservative than the airport’s MCT. This is especially true for carriers that operate hub-and-spoke models, like Cathay Pacific, Singapore Airlines, and Qatar Airways.

Cathay Pacific (CX): The 60-Minute Rule

Cathay Pacific’s internal policy for connections at HKG is 60 minutes for same-terminal and 90 minutes for inter-terminal. This is 10–20 minutes more than the airport’s official MCT. The reason is operational: CX uses a staggered boarding system that requires passengers to be at the gate 20 minutes before departure. If your inbound flight lands at Gate 22 and your outbound departs from Gate 80 (a 15-minute walk), you have 25 minutes to get from the arrival gate to the departure gate, clear any secondary security, and board. It’s doable, but only if your inbound is on time. CX’s 2024 on-time performance data shows that 78% of its flights arrived within 15 minutes of schedule. That means one in five flights is late enough to stress a 60-minute connection.

Singapore Airlines (SQ): The 75-Minute Buffer

SQ’s internal MCT at Changi is 75 minutes for most international-to-international connections, even though the airport’s official MCT is 50 minutes. This is partly because SQ uses a higher proportion of wide-body aircraft (A380s and A350s) that require longer turnaround times. It’s also because SQ’s premium cabins mean more passengers with priority boarding and more bags to offload. I once connected from a CX flight to an SQ flight at Changi with a 70-minute layover. I made it, but my checked bag didn’t. It arrived the next day on the next SQ flight. Since then, I’ve treated SQ’s 75-minute rule as gospel.

Qatar Airways (QR): The Doha Shuffle

At Hamad International Airport (DOH), QR’s internal MCT is 60 minutes for same-terminal and 90 minutes for inter-terminal (the airport has two main concourses, A and B, connected by a 10-minute walk). The airport itself is efficient, but QR’s boarding process is notoriously slow: they start boarding 45 minutes before departure and close the gate 20 minutes before. That means a 60-minute connection gives you only 40 minutes from landing to gate closure. In practice, I’ve found that 75 minutes is the minimum for a comfortable transfer at DOH, especially if your inbound arrives at a remote stand (common for flights from Africa and South Asia).

The Self-Transfer Trap: When the MCT Doesn’t Apply

The biggest risk for Hong Kong travellers isn’t a tight connection on a single ticket. It’s the self-transfer itinerary booked through a third-party platform. If you book two separate tickets (e.g., CX from HKG to SIN, then a separate SQ ticket from SIN to London), the airline has no obligation to rebook you if you miss the second flight. This is where the MCT becomes meaningless.

Why Third-Party Platforms Are Dangerous

Platforms like Trip.com, Expedia, and Kayak often show itineraries with layovers as short as 60 minutes, even when the two flights are on different tickets. They do this because their algorithm treats each segment independently. The 2024 Hong Kong Consumer Council report on online travel agencies found that 23% of complaints about self-transfer itineraries involved missed connections due to insufficient layover time. The report recommended that travellers allow at least 3 hours for any self-transfer at a major hub, regardless of the airport’s MCT.

How to Protect Yourself

If you must book a self-transfer, follow these rules:

• Allow at least 3 hours for the connection.
• Book both flights on the same ticket where possible (even if it costs more).
• If you’re flying CX from HKG to SIN, then SQ from SIN to London, consider booking the entire itinerary through CX’s codeshare agreement with SQ. That way, you get a single ticket and the airline guarantees the connection.
• Pack a change of clothes and your essentials in your carry-on. If your bag doesn’t make it, you’ll be glad you did.

Actionable Takeaways

1. For single-ticket itineraries on CX, SQ, or QR, allow at least 75 minutes for same-terminal connections and 90 minutes for inter-terminal transfers — these are the internal minimums, not the airport MCTs.
2. For self-transfer itineraries booked through third-party platforms, budget at least 3 hours between flights, regardless of what the platform shows.
3. Always check your inbound flight’s on-time performance on FlightRadar24 or the airline’s app before you leave the gate — if it’s running late, ask the cabin crew to help you rebook before landing.
4. At Changi, avoid connections that require moving between Terminal 4 and Terminals 1–3 unless you have at least 90 minutes — the bus transfer adds 20 minutes to your transit time.
5. If you’re flying premium economy or business, use the priority lane at immigration and security — it can shave 10–15 minutes off your connection time, which is often the difference between making it and missing it.