As a rule of thumb, on domestic routes, you need a minimum of 45 minutes between flights. That's because you don't have to go through security, customs, and immigration.
What is a reasonable transit time?
What is a good connection time? Travel advisers say there's a lot to take into account when booking connecting flights, but a general rule of thumb is 60-90 minutes between domestic flights and at least two to three hours for international itineraries.
How long should you allow for transit?
Although it's difficult to say exactly how much time should be left between connecting flights, you should always try to have at least an hour for domestic connecting flights and at least two hours for international connecting flights.
Is 45 minutes enough for transit?
Is 40 minutes of transit enough?
Overall, if you can get a connection of 2hrs, you'll be safe; but 40 mins might be really tight; especially considering that if you're first flight departs 10–15 mins late, you only have 25–30 mins, and depending on the airport, this definitely won't be enough.
Is 1 hour transit too short?
The recommended layover time for international flights is generally longer, as you will have to go through customs and immigration before boarding your next flight. In most cases, a 30-minute layover for domestic flights and an hour for international flights is considered a minimum, or short, layover.
Is 40 minutes enough for transit?
Overall, if you can get a connection of 2hrs, you'll be safe; but 40 mins might be really tight; especially considering that if you're first flight departs 10–15 mins late, you only have 25–30 mins, and depending on the airport, this definitely won't be enough. Generally speaking, that's really pushing the envelope.