Layover Time Calculator
Convert a layover duration in minutes to hours and minutes. Check if your layover is long enough.
How to use this tool
- Enter your layover duration in minutes (found on your itinerary).
- Enter the minimum connection time for your airport and route type.
- The calculator shows the layover in hours and minutes and how much buffer you have above the minimum.
Convert your layover time to hours and minutes and check you have enough buffer for your connection.
⚠ This tool provides general estimates for education only and is not financial, tax or legal advice. Figures may not reflect your situation — verify with a qualified professional.
Formula
Hours = ⌊Layover minutes ÷ 60⌋
Remaining minutes = Layover minutes mod 60
Buffer = Layover minutes − Minimum connection time (min)
How it works
This calculator decomposes a layover duration given in total minutes into hours and leftover minutes using integer division and the modulo operation. It then subtracts the minimum required connection time to show how much buffer a traveller has before a connection becomes risky. A positive buffer means the layover exceeds the airline's or airport's published minimum connection time; a negative buffer signals a tight or potentially missed connection.
Worked example
- Layover duration = 150 minutes; minimum connection time = 45 minutes.
- Hours = ⌊150 ÷ 60⌋ = 2 h.
- Remaining minutes = 150 mod 60 = 30 min.
- Buffer = 150 − 45 = 105 minutes above the minimum.
2 h 30 min layover; buffer above minimum = 105 min
Common mistakes to avoid
- Using departure time on the ticket instead of actual wheels-down landing time, which can be 15-30 minutes later.
- Ignoring that the minimum connection time (MCT) at large hub airports can be 60-90 minutes, not the 30 minutes people assume.
- Forgetting to account for terminal changes or airside/landside switches that add 20-45 minutes of walking and re-screening.
Key terms
- Minimum connection time (MCT)
- The shortest time an airport or airline deems sufficient to transfer between two flights, accounting for deplaning, transit, and boarding.
- Buffer
- The extra time a passenger has beyond the minimum connection time; larger buffers reduce the risk of missing a connection.
- Modulo operation
- The remainder after dividing one integer by another; used here to extract the leftover minutes after full hours are counted.
- Layover
- A stop at an intermediate airport between connecting flights, where the passenger must remain in the terminal.
Frequently asked questions
- How long of a layover do I need?
- For domestic connections at the same airport, 45–60 minutes is typically sufficient. For international connections or connections requiring a terminal change, allow 90–120 minutes minimum.
- What happens if my layover is too short?
- If your flights are on the same booking, the airline is responsible for rebooking you if you miss the connection due to a delay. If booked separately, you bear the risk.