Airport connections: how much time do you really need?

The MCT — Minimum Connecting Time — is the official figure an airport declares as sufficient for making a connection. It's an administrative number. It accounts for none of your physical condition, none of the cascading delays, none of the queue realities on a Tuesday in July at 5pm.

Hundreds of thousands of passengers miss their connections every year because they trusted the official MCT. Here's how to think differently.

What the MCT doesn't measure

The MCT is calculated under ideal conditions: on-time arrival, arrival gate close to departure gate, no security queue, cabin baggage only. Remove a single one of those conditions and you're in a different reality.

What the MCT ignores:

• Delays on the inbound flight (common, especially late in the day)
• Queues at connecting security checkpoints
• Distance between terminals (sometimes 20–40 minutes on foot or by shuttle)
• Passport control for Schengen/non-Schengen zone changes
• Checked baggage that must be manually transferred

The hubs to watch closely

Paris Charles de Gaulle — Terminal 2

CDG T2 is one of Europe's most complex airports. Terminal 2 is actually a cluster of sub-terminals (2A, 2B, 2C, 2D, 2E, 2F, 2G) connected by shuttles and underground passages. A 2E → 2F connection is quick. A 2E → 2G connection can take 40 minutes.

The official MCT at CDG is 60 minutes for Schengen-to-Schengen. In practice:

• Same sub-terminal, domestic flight: 60 min works if everything is on time.
• Between different sub-terminals: allow 90 minutes minimum.
• Non-Schengen to Schengen (or vice versa): count on 2 hours minimum. Passport control can take 30–45 minutes at peak times.

CDG also has some of Europe's highest delay rates, particularly on Air France short-haul flights later in the day. Never book a CDG connection under 90 minutes, regardless of what the booking system shows.

Frankfurt (FRA)

Frankfurt is generally more efficient than CDG, but its size demands attention. Terminal 1 is split into concourses A, B, C. Terminal 2 (concourses D and E) is connected by an 8-minute automated train.

Official MCT: 45 minutes Schengen-to-Schengen. Real times:

• Terminal 1 → Terminal 1, same concourse: 45–60 min, workable if on time.
• Terminal 1 → Terminal 2: add 20 minutes transit minimum, plan for 90 min.
• Long-haul non-Schengen arriving in T1 B/C concourse to Schengen: passport control mandatory, 90 comfortable minutes.

Dubai (DXB)

Dubai is a well-oiled machine for Emirates connections. Terminals 1 (other airlines) and 3 (Emirates) are in the same building but at significant distance. Official Emirates MCT: 60 minutes.

In practice, Emirates-to-Emirates connections work well with 75–90 minutes, especially boarding from satellites. However:

• A delayed inbound flight at DXB toward an imminent departure: Emirates is known to depart without connecting passengers the moment the flight closes.
• Terminal 1 → Terminal 3: always plan 2 hours — the shuttle plus walking time plus security can easily exceed 45 minutes.

Amsterdam (AMS)

Schiphol is a single-terminal airport — a significant advantage. KLM connections are generally smooth. The MCT is 40 minutes, which is realistic if the inbound arrives on time. With a 15-minute arrival delay, you start gambling on a 50-minute connection.

London Heathrow (LHR)

Heathrow has 5 terminals. Inter-terminal connections require a bus or the internal Heathrow Express. Official MCT: 60–90 minutes depending on terminals.

• T2 → T3: fast, nearly the same building.
• T3 → T5 (British Airways): allow 30–40 minutes transit time alone.
• Heathrow security queues can be unpredictable. During busy periods, a one-hour queue is not uncommon.

Airport	Official MCT	Recommended time	Risk level
CDG T2 (inter-terminal)	60 min	90–120 min	High
Frankfurt (inter-terminal)	45 min	90 min	Moderate
Dubai T1→T3	60 min	120 min	High
Amsterdam Schiphol	40 min	60–75 min	Low
Heathrow (inter-terminal)	60–90 min	90–120 min	Moderate
Singapore Changi	60 min	75 min	Low

Practical rules that prevent disasters

Never accept a "legal" connection offered by a search engine under 90 minutes at a complex hub. Booking systems respect official MCTs — not your stress levels.

Identify your riskiest segment — it's almost always the feeder flight into the hub. A short-haul flight arriving 25 minutes late can ruin an intercontinental long-haul.

Book on a single ticket where possible. With two separate tickets and a missed connection, the second airline has no obligation to rebook you. On a single ticket, they must find a solution.

Check gate locations 24 hours before the flight. At a hub like CDG or LHR, the difference between a gate in concourse D and one in concourse G can mean the difference between a calm transit and a full sprint.

Missed connections are rarely down to bad luck. They're down to missing information at the time of booking.

When the connection fails anyway

If you're on a single ticket and miss your connection because of an inbound delay, the airline is obligated to reroute you. If the inbound was operated by a different airline, negotiate directly with the carrier whose flight you missed — they hold the responsibility.

Keep all documents, tickets and time records. They'll be useful for an EC261 claim if the total delay exceeds 3 hours.