Is a 1h40m Zurich layover enough?

Whether a 1h40m Zurich layover is workable

A 1 hour 40 minute international layover at Zurich Airport can be workable, but it depends heavily on whether you have to clear immigration and security again, how far the gates are from each other, and whether your arriving flight is likely to be on time.

Why the timing can be risky: Zurich is a major hub, and international connections may require multiple steps after landing—such as moving between terminals, going through passport control/entry checks (depending on route and ticketing), and then getting to the departure gate for your next flight. Even when the connection is booked correctly, delays in any segment can consume the available buffer quickly.

For travelers planning a connection in that window, the most important practical checks are:

• Is it an international-to-international connection on one ticket? Tight connections go much better when the airline has responsibility for rebooking if the first flight is late.
• Will you need immigration/entry formalities? If yes, that’s usually the biggest time sink.
• Gate-to-gate distance: terminals at large airports can be far apart.
• Typical punctuality on your specific flights and the time of day.

The reason this matters is operational: with only 100 minutes, you can’t count on extra time for walking delays, long lines, or last-minute document checks. If anything goes off schedule, you may risk missing the connection and then facing rebooking, which can be especially inconvenient if your next flight departs soon after.

Without route-specific details, it’s still safest to treat 1h40m as a borderline connection at a large airport like Zurich—acceptable only if flights are likely to arrive on time and you’re on a protected itinerary.