Is a 1-hour layover enough? How to tell before you book

A 1-hour layover is usually enough for a domestic connection on one ticket, when you arrive and leave from the same terminal and your first flight is on time. It's often not enough if you're arriving from another country, changing terminals at a large hub, traveling on separate tickets, or flying at a time of day and year when delays are common. The layover time on your ticket isn't the problem; what goes wrong is the first flight landing late.

First: one ticket or separate tickets?

• One ticket. Airlines only sell connections that meet the minimum connection time for the airport. If a late first flight makes you miss the second, the airline rebooks you. DOT says the 10 largest US airlines guarantee free rebooking when the disruption is within their control. So a short layover on one ticket is a risk to your time, not to your trip.
• Separate tickets. Nobody checked that your connection works, and if you miss the second flight, that airline doesn't have to help. You may also have to collect and recheck bags. Leave several hours, not one.

The four questions that decide it

1. Is your first flight likely to be late? A flight counts as late in US statistics when it arrives at the gate 15 minutes or more after schedule. In June 2026, about 73% of flights by reporting US airlines arrived on time, so roughly 1 in 4 was at least 15 minutes late. Late-day flights, summer thunderstorms and winter weather make delays more likely. You can see active ground stops and delay programs on the FAA's status page (nasstatus.faa.gov). Read ground stop vs. ground delay.

2. Are you arriving from another country? At your first US airport you go through passport control, collect your checked bags, clear customs, recheck them and go through TSA again. That takes much longer than a domestic connection. See international to domestic connections. The exception is preclearance: flights from airports such as Toronto, Vancouver, Dublin or Abu Dhabi arrive as domestic flights.

3. Do you have to change terminals? Check the terminal for each flight on your boarding passes or in your airline's app. Staying in the same concourse can mean a short walk; changing terminals at a large hub may mean a train or bus and, at some airports, going through security again.

4. Where are you sitting? Getting off a large plane from a back row takes time. A seat near the front helps on a tight connection.

A quick guide

If you do book a short layover

1. Choose a seat near the front and carry on your bag if you can.
2. Know your next gate before you land. Check the terminal and gate in your airline's app while you still have a connection.
3. Watch your first flight's arrival time and tell the crew if your connection is tight.
4. If you miss it, go straight to the airline's app or transfer desk. Read what happens next.

Airport by airport

What each hub publishes about connections, from terminal changes to customs:

• Atlanta, Charlotte, Chicago O'Hare, Dallas Fort Worth, Denver
• New York JFK, Newark, San Francisco, Seattle
• Toronto Pearson, Vancouver

See your connection at a glance

Add both flights to FlyingOver before you travel. You'll follow the first flight offline and see its estimated arrival, and with Premium, connection guidance shows whether your layover looks comfortable, whether you need to keep moving, or whether you should go directly to the gate.