How to choose · Airlines and flights
How to choose a safe connection time between flights
Last updated 25 October 2026 · 2 sources listed · Reading time about 3 minutes
Short answer
Choose a connection time that reflects airport size, whether you change terminals or clear immigration, whether bags are checked through, and whether both flights are on one ticket. A tight layover is fine only when everything is on a single booking. Where separate tickets are involved, allow generous buffers because the airline owes you nothing if the first flight is late.
Who this is for: Travellers building an itinerary with a layover who want to avoid missed connections without wasting hours in an airport.
What to evaluate
Single ticket versus separate tickets
On one booking the airline must rebook you if a delay causes a missed connection. On separate tickets you may lose the second flight and have to buy another.
How to check: Confirm that both legs share one booking reference and a single passenger record.
Airport layout and terminal changes
Large hubs can require trains, buses or long walks between terminals, and some airside routes are closed at certain hours.
How to check: Look up the airport map and the minimum connection time published for your terminal pair.
Immigration and security re-screening
Many international itineraries require clearing passport control, collecting bags or passing security again, each of which can be slow at peak times.
How to check: Check whether you must enter the country, and whether your bags are tagged to the final destination.
Reliability of the inbound flight
Flights on busy routes or in bad-weather seasons are often delayed, which shrinks a connection further than planned.
How to check: Look at the typical punctuality of the first flight and avoid late-evening arrivals before a last-departure connection.
Backup options on the route
A connection with several later departures to your destination is less risky than the last flight of the day.
How to check: See how many onward flights operate on the same day and with what airline partnerships.
Comparison
| Situation | Reasonable buffer | Watch out for |
|---|---|---|
| Domestic, same terminal, one ticket | Short, allowing for boarding time | Delayed inbound flights and gate changes |
| International with immigration, one ticket | Generous, to cover border queues and re-screening | Peak arrival waves and long walks |
| Separate tickets, bags rechecked | Very generous, often several hours | No rebooking duty and baggage reclaim delays |
| Terminal change by train or bus | Moderate to long | Shuttle frequency and security at the second terminal |
Decision worksheet
Rate up to three options against this guide’s own criteria. It runs in your browser and saves only on this device. It is a thinking aid, not a recommendation.
1. Have you checked each criterion?
0 of 5 criteria checked.
2. Compare options (0 = fails or unknown, 3 = meets it well)
| Criterion | |||
|---|---|---|---|
| Single ticket versus separate tickets | |||
| Airport layout and terminal changes | |||
| Immigration and security re-screening | |||
| Reliability of the inbound flight | |||
| Backup options on the route | |||
| Total (max 15) | 0 | 0 | 0 |
Questions to ask before you commit
- Are both flights on a single booking with one reference?
- Will my bags be checked through to the final destination?
- Do I need to change terminals or clear immigration?
- What is the minimum connection time at this airport for my terminal pair?
- Does the airline protect connections if the first flight is delayed?
- When is the last flight to my destination that day?
Typical trade-offs
Short layover versus long layover
- Upside
- A short layover saves time and keeps the trip compact.
- Downside
- A single delay can cause a missed connection and an overnight stay.
Single ticket versus cheaper separate tickets
- Upside
- Separate tickets can lower the price and widen options.
- Downside
- If the first flight is late, the airline is not responsible for the second.
Overnight connection versus same-day
- Upside
- An overnight stay removes the risk of missing the next flight.
- Downside
- It adds hotel cost and may need a transit visa depending on the country.
Common mistakes
- Booking a tight connection on separate tickets. Leave several hours or book as one itinerary.
- Forgetting immigration at the connecting airport. Check whether you must enter the country and whether you need a transit visa.
- Choosing the last flight of the day as the onward leg. If you miss it, you are stuck overnight.
- Assuming bags are checked through. Confirm at check-in and look at the tag.
- Trusting the published minimum connection time as a promise. It is a baseline, not a guarantee against delays.
Related questions
How long should I leave between connecting flights?
There is no universal figure. On one ticket within a single terminal, a modest buffer is usually adequate. When you cross borders, change terminals or collect bags, you need substantially more. Weigh airport size, historical delays and the number of backup flights. Where the airline protects the connection, a tighter plan carries less risk; where it does not, add hours.
What happens if I miss a connection because my first flight was late?
On a single booking, the airline generally rebooks you on the next available flight at no extra cost, and may provide meals or accommodation depending on local rules. Go to the transfer desk promptly rather than leaving the airport. On separate tickets, the second airline may treat you as a no-show, and you could have to buy a new ticket. Keep records of delays.
Do I need a transit visa for a layover?
It depends on the airport, your nationality and whether you stay airside. Some countries require a visa even if you only change planes, while others allow visa-free transit. If you must leave the airport, collect bags or switch terminals landside, requirements increase. Check the government immigration page for the transit country and ask your airline.
Is a longer layover always safer?
Usually, but not always. A very long layover increases waiting time, cost and fatigue, and an overnight stay may involve visa and baggage complications. The aim is a buffer that absorbs ordinary delays without turning the trip into a marathon. Choose a layover long enough to handle immigration and a terminal change comfortably.
Sources and further reading
These pages were reachable when we last checked. They informed definitions and rules referred to above; they do not endorse this guide. Where rules differ by country, check the authority for your location.
- Aviation Consumer Protection — US Department of Transportation, retrieved 27 October 2026
- International Air Transport Association — IATA, retrieved 27 October 2026
Related guides
Comparison · Airlines and flights
Basic fare vs standard economy fare: what you really give up
A basic fare lowers the ticket price by removing things people often need: checked or even cabin bags, seat choice, changes, refunds and sometimes loyalty credit or boarding priority. It suits light packers on fixed plans. Price your actual trip with bags, seat and change flexibility added, then compare the totals rather than the headline fares.
Problems & fixes · Airlines and flights
What to do when a flight is delayed or cancelled
Your rights depend on where the flight departs from or lands and who operates it. Many regions require airlines to offer a refund or rerouting for cancellations and some provide care and compensation for long delays. Act quickly: record the reason given, keep receipts, choose between refund and rerouting knowingly, and use the airline's claim process before going to the regulator.
Requirements · Airlines and flights
Flying with an infant or toddler: seat, documents and gear requirements
Rules differ by airline and country, but the main decisions are whether your child travels as a lap infant or in their own seat, whether you use an approved child restraint, and what documents and baby gear are allowed. Check age thresholds on the specific airline, request seats early, bring proof of age and passport, and confirm how strollers and car seats are handled.
How to choose · Banking and personal finance
How to choose between retirement account types
Retirement vehicles differ in who contributes, how contributions are taxed, when you can access the money and who bears investment risk. Compare employer matching, tax treatment on the way in and out, investment choice, fees and portability. Rules are jurisdiction-specific, so confirm with your tax authority or pension regulator and consider independent guidance.
How to choose · Sports and outdoor
How to choose a club for a child's first team sport
Pick a club by looking at coaching approach, safeguarding practices, how playing time is shared, travel and time demands, and the way the club handles beginners. A good first club keeps sessions fun, groups children by age and ability, and has trained, background-checked coaches. Visit a session, speak with other parents and compare commitments before paying any membership.
How to choose · Cruises
How to choose a cruise cabin: inside, oceanview, balcony or suite
Choose by how much time you will spend in the cabin, how sensitive you are to motion and noise, and what you value in a view. Inside cabins suit people who are out all day, balconies suit those who want private outdoor space, and location on the ship matters as much as category. Check deck plans for noise sources, obstructed views and proximity to lifts.
Problems & fixes · Travel insurance
Travel insurance and pre-existing medical conditions: what to check
Insurers define pre-existing conditions in their own wording, and failing to declare one can lead to a refused claim. Read the definition, answer medical screening questions accurately, ask how conditions are covered or excluded, and check whether cover is automatic or needs an extra premium. Specialist providers exist for complex cases. Keep records of what you declared and the insurer's response.
All Airlines and flights guides · All Travel and hospitality