Layovers and Connections, Without the Panic

What MCT actually means

Minimum connection time (MCT) is the shortest gap an airport publishes as workable between two flights, and it varies wildly by airport and by whether you are staying airside or changing terminals. Amsterdam Schiphol (AMS) publishes an MCT as low as 50 minutes for a Schengen to Schengen connection, but a Schengen to non-Schengen change through passport control can realistically need 75 to 90 minutes.

London Heathrow (LHR) is worse for terminal changes: connecting from Terminal 5 to Terminal 3 involves a bus or the Heathrow Express-style transfer train, and the airport's own MCT for that combination sits around 75 minutes minimum, with 2 hours a much safer real-world number if either flight is even slightly delayed.

Self-transfer is not the same booking

A single ticket booked through one airline or an alliance guarantees rebooking if you miss a connection because of a delay on their first leg. A self-transfer, where you book two separate tickets through a site like Kiwi.com to save money, guarantees nothing. If your first flight into Istanbul (IST) lands late and you miss the second ticket entirely, that is your loss, not the airline's problem.

Self-transfers can work well and save real money, especially routing through hubs like IST, AMS or Reykjavik Keflavik (KEF), but they need generous buffers. A rule that has served me well: minimum 3 hours for a self-transfer within Schengen, minimum 4 hours if either leg crosses a border control point.

Airports where a short connection is genuinely risky

• Heathrow (LHR) with a terminal change: security queues at T5 alone can run 30 to 40 minutes at peak times.
• Charles de Gaulle (CDG): the layout spreads terminals far apart, and the shuttle bus between 2E and 2F can eat 20 minutes on its own.
• Istanbul (IST): a huge single terminal helps, but passport control queues for non-EU passports can be long during peak Turkish Airlines banks.
• Manila (MNL) and a handful of Southeast Asian hubs: terminal transfers sometimes require leaving and re-entering security entirely.

When a connection actually goes wrong

1. Head straight to the transfer desk. Not the check-in counter; airport transfer desks exist specifically to rebook missed connections on through-tickets.
2. Ask about the next available flight, not just today. On a thin route, the next seat might be 24 hours out, so ask about all options including a different airline under the same alliance.
3. Keep boarding passes and receipts. If the delay was the airline's fault, EU261 compensation rules may apply for departures from EU airports.
4. Call the airline while you queue. Phone rebooking often moves faster than the physical desk line during a mass misconnection event.

Building a layover you will not regret

A tight connection saves an hour of your life and risks an entire day of it. Unless the itinerary is a single ticket with airline protection, pad the layover, especially through airports with terminal changes or through any self-transfer. A 3-hour layover in Amsterdam with a coffee at Bubbles Seafood Bar in the departure lounge is a far better travel day than a 45-minute sprint that ends with you rebooking at a transfer desk in Istanbul.