Booking Flights With Connections
The most consequential distinction in connecting travel is whether the flights are on one ticket or two, and it is frequently invisible when booking.
Single ticket
Where the whole journey is on one booking, the airline is responsible for getting you to your final destination.
If a delay causes you to miss the connection, they rebook you at no cost, and duty of care provisions for meals and accommodation typically apply.
Baggage is usually checked through to the final destination.
This protection is the reason a single ticket is worth paying more for on any itinerary where a missed connection would be serious.
Separate tickets
Two bookings mean two contracts. The first airline's obligation ends when it delivers you to the connecting airport.
If you miss the second flight, that is a no-show and the fare is generally lost. The second airline has no obligation to you.
Baggage must usually be collected and re-checked, which requires clearing immigration and customs in many cases and takes considerable time.
Self-connecting is legitimate and frequently cheaper, and the saving should be weighed against the cost of the worst case.
Connection times
Airports publish minimum connection times, which assume everything goes normally. They are minimums rather than recommendations.
Allow considerably more where the connection involves changing terminals, clearing immigration, or moving between airports.
International to domestic connections frequently require collecting and re-checking baggage even on a single ticket, depending on the country.
On separate tickets, allow enough time to collect baggage, clear formalities, check in again and clear security — commonly three hours or more, and an overnight stop for anything critical.
Reducing the risk
Book the earliest sensible departure, since delays accumulate through the day and there are more later alternatives if something goes wrong.
Prefer connections through airports with frequent onward services, so a missed flight means waiting hours rather than a day.
Avoid the last connection of the day where possible.
Check whether the airlines have an interline agreement, which determines whether baggage can be through-checked and whether one will assist if the other is delayed.
If it goes wrong
On a single ticket, go to the airline desk or app immediately and request rebooking, and ask about meals and accommodation entitlements.
On separate tickets, contact the second airline as early as possible — some will move you for a fee, which is better than losing the fare entirely.
Travel insurance covering missed connections is worth having specifically for self-connected itineraries, and check whether it covers separate ticket arrangements, since some exclude them.
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