Connections: route, deadlines and scenarios

Connection worksheet with a completed calculation

Assume arrival 10:00; onward departure 11:30; gate closes 11:10. Disembarkation 15 min + transfer 20 min + controls 20 min = 55 min. The deadline is 70 min away, leaving 15. Arrival 20 min late leaves −5. These are original scenarios, not airport timings.

Do not call a connection adequate merely because the subtraction is positive. Record unknown steps and confirm them before buying. Reassess after a flight change.

Connections: find the next flight without assuming the route

A connection uses another flight to reach the destination. Before buying, establish whether the legs are sold as a combined journey or as separate tickets. Being in one email or on the same airline does not settle that question. The contract affects disruption handling; the physical path depends on the airport and route.

After leaving the aircraft, follow transfer signs and check the next flight. Establish whether you have its boarding pass, whether bags continue or must be collected, and whether screening, immigration or a terminal change is involved. At Heathrow, official guidance specifies new screening for passengers boarding another flight; other connections can work differently.

Fictional case: planned arrival 10:00, onward flight 11:30, gate closes 11:10. There are 70 minutes until closure, not 90. Disembarkation, movement and controls still fit inside that interval. This calculation explains the limit; it does not certify a sufficient connection. The deeper explanation compares scenarios and margins.

Two independent questions: who handles disruption, and which route do you follow?

The first question is contractual: are the legs part of a jointly sold journey or independent tickets? The second is operational: which controls, movements and baggage procedures apply? A combined journey can require bag collection; a transfer without collection can involve services with different contractual conditions. One answer does not prove the other.

Heathrow illustrates this separation by explaining that baggage transfer depends on the service and airline. EU guidance uses a single reservation and further conditions when assessing some consequences of missed connections. The practical inference is to confirm the contracted itinerary and physical transfer route separately. Neither source creates a universal guarantee of boarding or compensation.

Build the route before measuring time

Write the sequence required by your journey. One might be “leave aircraft → transfer control → security → new gate”. Another might include “immigration → collect bags → customs → ground transfer → bag drop → security”. These are question-building models, not maps of a particular airport. Use the airport and airline to fill in your actual sequence.

Each step consumes part of the interval, and some have separate closing deadlines. With checked baggage, reaching the airport before gate closure is not enough. An airport change adds transport waiting and travel to the correct terminal. If assistance was requested, confirm the meeting point and handover between carriers.

Worked case: 90 minutes between flights is not 90 free minutes

Original assumptions: arrival 10:00; onward departure 11:30; gate closure 11:10. The gate deadline is 70 minutes away. Assume 15 minutes to disembark, 20 to walk and 20 for controls: 55 minutes needed, leaving 15. All timings are exercise assumptions, not measurements or recommended connection times.

A negative margin means the plan does not fit those assumptions. Zero leaves no tolerance. A positive margin is not a guarantee: disembarkation, queues and movement vary, and a published arrival does not mean you are already outside the aircraft. Assess the margin with airport guidance, the airline and your needs; no single number certifies every route.

What separate tickets change

Add a second bag-drop deadline of 10:30. Although the gate closes at 11:10, your first limiting requirement is now handing over the bag by 10:30. Counting only to gate closure gives a misleading conclusion. The onward ticket may not cover delay from the first; check any commercial protection, seller-notification requirement and excluded costs before purchasing.

To decide, write five answers: purchase type, required controls, bag destination and collection, earliest deadline limiting the route, and the support channel for disruption. If any remains unknown, resolve it before declaring the connection suitable. When a flight changes, rebuild the route rather than carrying an old assessment onto a new itinerary.

Self-transfer: plan the link between tickets yourself

Self-transfer describes a connection built from separate tickets, often by a search service or the traveller. Read exactly what the seller offers if a flight is late; do not assume the second carrier will rebook for free when the first fails to arrive in time. An additional commercial guarantee has its own conditions.

List the actual sequence: leave the first aircraft, pass required controls, collect bags, transfer, check bags again before the deadline, and clear security. An airport change or permission to enter the country may be necessary. With no checked baggage some steps disappear; documents and deadlines do not automatically disappear with them.

Fictional case: the first flight arrives at 13:00 and the next departs at 15:00, but bag drop closes at 14:00. Your usable bag-drop window is one hour after planned arrival, before disembarkation and queues. A plan that needs every step to be instantaneous has no margin. Compare savings with the cost and feasibility of replacement travel, accommodation and transport.

A threatened or missed connection: contact the airline with the right details

If arrival is late, tell staff about the connection and check the onward flight’s status. On arrival, follow official instructions; do not try to bypass controls. If the gate has closed, contact the airline desk with leg details, times and how the journey was purchased.

Useful questions: is boarding still possible? What alternative reaches the contracted destination? What happens to bags, arranged assistance and later flights? Where should I wait and how will confirmation arrive? Before leaving the airport or buying replacement travel, request guidance and retain a reference; independently incurred expenses are not guaranteed reimbursement.

Example: departure is offered the next day. Confirm bag location and accommodation where due, as well as the new boarding pass. Rights depend on route, contract, cause and circumstances. EU guidance, for example, distinguishes connections on one reservation and the conditions for coverage; delays at screening or reaching a gate late are not automatically airline-caused delays.

References

• Connections at Heathrow
• EU air passenger rights
• Compare flight options in Google Flights
• Travel documents: route, nationality and residence
• Delays, cancellations and assistance

Sources checked 2026-09-27.