---
title: "How much connection time do I need between flights?"
description: "Why minimum connecting time is not a safety margin, which factors lengthen it, how terminal changes and screening work, what changes on separate tickets and when more buffer stops helping."
url: "https://benefitsystems.io/en/knowledge/connection-time"
lang: "en"
category: "Booking and flight search · Planning"
domain: "reise"
pillar: "booking-and-flight-search"
status: "entwurf"
published: "2026-09-18"
reviewed: "2026-09-18"
type: "Artikel"
---

# How much connection time do I need between flights?

> **Entwurf.** Dieser Beitrag erfüllt die Redaktionsregel noch nicht vollständig und ist nicht indexiert.

An airport's minimum connecting time describes the shortest gate-to-gate path under ideal conditions and is not a buffer against delay. It assumes an on-time arrival, a nearby gate and no additional screening, which is why adding time on top of it is worth doing at every booking.


## At a glance

| Factor | Effect on the time needed |
|---|---|
| Connection within one terminal | small |
| Terminal change | large |
| Repeat security screening | large |
| Immigration with baggage reclaim | very large |
| Separate tickets | very large |
| Last flight of the day | risk rather than time |

## What minimum connecting time actually says

Between two itineraries at the same price to the same destination, the [connection time](/en/glossary/layover) decides how
the travel day goes. It appears as a single number in a search, and it says less than most
travellers assume.

Every airport publishes a minimum connecting time, and booking systems sell nothing below it, which
creates the impression that anything offered is safe. The figure describes the shortest path under
ideal conditions: an on-time arrival, a nearby gate and no
[additional screening](/en/glossary/secondary-security-screening).

So the minimum is a floor. Whatever buffer an itinerary has lies in the time booked beyond it.
Minimum connecting time answers whether an itinerary may be sold, not whether it will work, and
those are two different questions.

The clock runs from the scheduled arrival, not from the moment the door opens, and at large
airports those two moments sit ten to twenty minutes apart. The number also describes the
airport's infrastructure and says nothing about how punctual the airlines are. Two airports with the
same minimum time can behave very differently on an ordinary Tuesday.

Responsibility is the part travellers tend to miss. Booking an itinerary the system offers means a
full claim to [rebooking](/en/glossary/re-routing) if the connection fails, as
[missing a connection](/en/misconnections) describes. The minimum time protects that claim; it does
not protect the trip.

## The factors that cost time

### The walk inside the terminal

Three quantities determine how much time a connection needs: the walk inside the terminal, a
possible repeat screening and the time of day. None of them sits in the minimum connecting time,
and all three can be looked up before booking.

A connection within one terminal is the simplest case. The distances are short and the time usually
holds even with a mild delay. A terminal change costs considerably more, because waiting for a
transfer bus or train comes on top, and those do not run every minute.

Terminal changes vary a lot in price. A change on an internal train inside security costs ten
minutes; a change by bus outside security costs half an hour plus the screening afterwards. The
airport's own pages settle the question in two minutes.

At large [hubs](/en/glossary/hub) the walk itself is the largest item, and twenty minutes on foot
is normal there. At sprawling airports another quarter of an hour can sit between screening and the
furthest gate, while boarding closes well before departure.

### Screening and immigration

Disembarking eats into the time before anyone starts walking. On a full long-haul flight twenty
minutes can pass between arrival at the stand and the last passenger reaching the door, and anyone
seated at the back loses all of it.

A repeat security screening is the second large item. It applies when the transfer leaves the secure
area or crosses between areas with different standards. The queue there varies strongly by hour:
early morning and early evening are the longest, because that is when the departure waves leave.

Immigration is the most expensive item of all. It is mandatory at some destinations, it brings
baggage reclaim with it, and it happens more often than most expect. Some countries require entry
even where the bag would otherwise be through-checked, and the connection time needed then doubles
compared with a pure transit.

### Time of day and season

The time of day acts on all of these at once. At peak hours the walkways are fuller, the queues
longer and the transfer buses more crowded, and the difference from a quiet hour is easily twenty
minutes. The season matters too. During school holidays and around public holidays screening times
lengthen noticeably, and a connection that works in November is tight in August.

The first wave of the morning is the most punctual, because the aircraft stood overnight at the
airport. Delays accumulate with every later wave, so a tight connection early in the morning is
more reliable than the same connection in the evening.

## Worked example: one airport, several itineraries

Take several itineraries through the same airport that differ only in connection time and
terminal.

| Itinerary | Connection time | Terminal | Assessment |
|---|---|---|---|
| A | just above the minimum | same | works if on time |
| B | just above the minimum | change | risky |
| C | one hour more | change | solid |
| D | two hours more | change | safe but long |
| E | just above the minimum | with immigration | not advisable |
| F | separate tickets, three hours | change | risk stays with the traveller |

Itinerary A is the baseline. Within one terminal the walk is short, and as long as the inbound
lands on time the connection holds, even with a few minutes lost at the stand. A delay of half an
hour is a different matter, and there is nothing in reserve to absorb it.

Itinerary B is the most common trap. It satisfies the minimum connecting time and is still a poor
choice, because the terminal change alone uses up what little margin there is.

An hour above the minimum, as in C, works best for most trips. It absorbs the usual small delays and
lengthens the journey by a manageable amount. Doubling that to two hours, as in D, does not make the
itinerary twice as safe; the gain in safety flattens out while the waiting grows.

Immigration with reclaim, screening and recheck consumes more time than travellers expect, and none
of it can be hurried. That is why E, with the same nominal margin as A, sits at the bottom of the
assessment.

F shows how little the column means on its own. Three hours on
[separate tickets](/en/glossary/separate-tickets) are worth less than one hour on a single booking,
because in one case the traveller carries the risk and in the other the airline does.

## What changes on separate tickets

On a single booking the system checks the minimum connecting time, and a
[missed connection](/en/glossary/misconnection) is rebooked at no cost. On separate tickets nobody
checks anything. An impossible connection can be bought, and on screen it looks the same as a
workable one.

Baggage comes on top. On separate tickets it is not through-checked and has to be reclaimed and
checked in again, as [through-checked baggage](/en/through-checked-baggage) describes. The measure
is then the time for reclaim, the walk, a new check-in and screening, as
[separate tickets](/en/separate-tickets) sets out, and the published minimum stops mattering.

Three hours is the floor on separate tickets, with no buffer included. Planning less buys a risk the
traveller carries, for a saving that sits below the price of the second ticket.

Booking such an itinerary anyway means planning it as two trips: packing so the bag is carryable at
the transfer, booking the second flight refundable, and never placing it on the last departure of
the day.

## When it is not worth adding more buffer

Extra time stops lowering the risk in several situations:

- **When the inbound is the last one of the day.** Only an earlier flight helps, not a buffer.
- **On a delay of several hours.** It exceeds any sensible margin.
- **When the onward flight operates once a day.** Rebooking is the answer, and time cannot replace it.
- **Beyond roughly three hours of buffer.** Only the layover grows.
- **At very small airports.** The walks are short and the queues empty, so a buffer buys less
  safety there than elsewhere.

At airports with known screening bottlenecks the picture runs the other way. Extra time helps there,
and the addition is the best investment in the whole booking. Travelling with children or with a lot
of hand luggage pushes in the same direction: the walks take longer, and the addition to the minimum
time rises accordingly.

Seat choice is a smaller lever. Sitting near the front on a tight connection recovers the time
disembarking otherwise costs, and it is the only lever still available on the day itself, as
[seat selection fees](/en/seat-selection-fees) describes.

Whether both flights are operated by the same airline or by partners is worth checking as well. With
partners the handover of bags and booking data is routine; between airlines without an agreement it
is not, as [codeshare](/en/codeshare) describes.

## What makes a booking better

A handful of decisions lower the risk more than any additional half hour.

Booking the trip as one itinerary moves the risk to the airline. Connecting within the same terminal
removes the largest single item. Taking the earlier departure of the day leaves a later one in
reserve, and carrying what is needed for the first hours defuses any rebooking.

The hour of the connection matters as much. A connection late in the morning meets empty queues and
one at seven in the morning meets full ones, and that difference exceeds half an hour of extra
buffer. So does the connecting airport itself: a smaller hub with short walks is the more reliable
option at the same connection time, and that choice is made at booking and never again.

Airports with separate areas for different airlines are a special case. A connection between two
partners can be shorter there than one within a single airline, because the gates sit closer
together. The infrastructure sets the rule, whatever logo is on the aircraft.

Portals display all this unevenly. Some show the connection time in hours and minutes, others only
the total journey time, and the critical number cannot be read off a total. Comparing two offers
means working it out from the individual flight times.

Adding terminal, screening and time of day to the calculation shows the difference between two
itineraries that look identical on screen. Buffer helps up to a limit; the form of the booking
helps every time.

Put together, the conditions are short: one booking, same terminal, no immigration, a quiet hour,
and then an hour above the minimum is enough. Missing one of those raises the buffer needed, and
missing two makes a different itinerary the better choice.

## The most common mistakes

- **Treating the minimum as a buffer.** It is a floor, and the buffer only starts above it.
- **Counting from the door opening.** The clock runs from the scheduled arrival at the stand.
- **Overlooking a terminal change.** At a large hub it is the largest single item in the connection.
- **Planning separate tickets tightly.** Reclaim, check-in and screening all have to fit, along
  with the walk.
- **Choosing the last departure of the day.** An earlier flight leaves a reserve behind it.
- **Travelling without a day of essentials in the cabin.** A rebooking hurts far less with them
  in the hand luggage.

## Related topics

- [Missing a connection](/en/misconnections)
- [Separate tickets](/en/separate-tickets)
- [Through-checked baggage](/en/through-checked-baggage)
- [Codeshare](/en/codeshare)
- [Reading fare rules](/en/fare-rules)
- [When to book](/en/when-to-book)

## Frequently asked questions

### What is minimum connecting time?

The shortest interval between arrival and departure at which an airport considers a connection possible under ideal conditions. Booking systems do not sell anything below it.

### Is it a safety margin?

No. It assumes an on-time arrival, a nearby gate and no extra screening. A margin exists only in the time booked beyond it.

### How much should I add?

Little within one terminal, considerably more with a terminal change, re-screening or an immigration entry. Terminal, screening and time of day decide the figure.

### What happens if I miss the connection?

On one booking the airline rebooks at no cost; on separate tickets the second flight is lost. That distinction outweighs any number of minutes.

### Does the clock start at landing or at the door?

At the scheduled arrival time, meaning arrival at the stand. Waiting for the door and walking up the aisle are not included.

### Why is a terminal change so expensive?

Because it frequently means passing screening again, and the transfer itself takes time. At large airports it is the single largest item.

### Does entering the country make a difference?

A large one. Immigration with baggage reclaim and recheck lengthens a connection substantially, and it is mandatory at some destinations.

### Does elite status help?

Sometimes, through dedicated screening lanes and transfer desks. It shortens queues without changing the minimum connecting time.

### What about checked baggage?

On one booking it is transferred and the minimum time accounts for it. On separate tickets it has to be collected and checked in again.

### Is the last flight of the day riskier?

Markedly. Missing it means an overnight stay, which changes the arithmetic of a tight connection entirely.

### Where do I find the minimum connecting time?

In the airport's own published figures; booking systems apply it automatically. Any itinerary offered for sale already meets it.

### Is a very long buffer worth it?

Up to a point. Beyond roughly three hours it only lengthens the day without reducing the risk further.

## Sources

- [OAG Aviation: What are Minimum Connection Times (MCTs)?](https://www.oag.com/blog/minimum-connection-times-insiders-guide)
- [Air Canada: Minimum Connection Time](https://www.aircanada.com/us/en/aco/home/plan/check-in-information/minimum-connection-times.html)
- [IATA: Station Standard Minimum Connecting Time(s) (MCT)](https://www.iata.org/en/publications/manuals/station-standard-minimum-connecting-time-mct/)