As a rule of thumb, aim for at least 60 to 90 minutes on a domestic layover and 2 to 3 hours on an international one. Those numbers buy you a comfortable connection. If you plan to leave the airport, you want a good deal more.
Most domestic connections need around an hour. Airlines publish a minimum connection time, often 45 to 60 minutes, but that is the legal floor, not a comfortable target. If you can change flights without re-checking bags and without switching terminals, 60 minutes is usually fine. Add a buffer at large hubs or during busy travel periods.
International connections need more room, typically 2 to 3 hours. You may have to change terminals, pass through transfer security, and in some cases clear immigration. Long-haul hubs are large, and a gate change at the far end of the airport can cost twenty minutes on its own.
| Connection type | Comfortable target |
|---|---|
| Domestic, same terminal | 60 minutes |
| Domestic, terminal change | 90 minutes |
| International, same airline | 2 hours |
| International, change of airline or terminal | 3 hours |
| Self-transfer or separate tickets | 3 to 4 hours |
If your connection is below the airline’s minimum, the system normally will not sell it, but irregular operations can still leave you tight. If you are nervous about a short connection, ask at the gate about being re-accommodated, and keep carry-on essentials with you. If you are on a single ticket and miss the connection because of a delay, the airline will rebook you.
If you want to step out and see the city, the math is different. Plan for at least 3 hours on a domestic layover and considerably more internationally once immigration and a second security screening are added. See can you leave the airport during a layover for the full picture.
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For a domestic connection in the same terminal, usually yes. For an international connection or a terminal change, one hour is tight and leaves no margin for delays.
It is at or below many airlines’ minimum connection times. It can work in a single small terminal with an on-time arrival, but it is risky if anything slips.
On a single ticket the airline rebooks you on the next available flight at no charge. On separate tickets you may have to buy a new ticket, which is why self-transfers need a wide buffer.
Aim for 2 to 3 hours for a comfortable connection, and more if you are changing terminals, clearing immigration, or on separate tickets.