Two separate tickets can make an itinerary look brilliantly cheap. The hidden problem appears when flight one is late and flight two does not know you exist as a connecting passenger. On a protected through-ticket, disruption may trigger rebooking obligations; on separate bookings, the second airline may simply see a passenger who failed to show up.
Protected connection and self-transfer are not the same product
EU passenger-rights guidance explicitly ties important missed-connection protections to flights booked as part of a single reservation. Separate services change who carries the risk when the first leg fails.
The four-hour connection that was not really four hours
Imagine landing at 14:00 for an 18:00 departure. On paper there are four hours. Then add a remote stand, immigration, baggage reclaim, a terminal change, bag drop closing before departure and another security queue. The usable connection can shrink dramatically.
Checked baggage changes the equation
Unless the itinerary and airlines explicitly through-check the bag, a self-transfer may require reclaiming luggage and checking it again. That can also mean entering the country and meeting transit or entry requirements.
Changing airports is a different category of risk
A connection from one airport to another is not a long layover; it is a ground journey with traffic, ticketing and disruption risk. Price the transfer before celebrating the fare.
How much buffer is enough?
There is no universal safe number. Airport layout, immigration, baggage, terminal transfer, season and the consequence of missing flight two matter. The more expensive the failure, the larger the buffer should be.
When separate tickets can make sense
They can work when the saving is substantial, the connection is deliberately long or overnight, entry requirements are clear and you can financially tolerate buying a replacement ticket.
The screenshot to keep before you buy
Save both fare conditions, baggage rules, terminal information and the exact booking structure. A cheap itinerary should survive a disruption thought experiment before payment.
Before you commit
Open the actual itinerary and test the weak point of the plan. Check the exact times, transport or booking conditions that matter for this trip, and verify time-sensitive rules with the airline, airport, accommodation or relevant authority. The goal is not to remove every risk; it is to know which risk you are accepting before money becomes non-refundable.
