Pilot how-to · inbound aircraft

Where Is My Plane Coming From? How to Find Your Inbound Aircraft

Matt, DelayGuard founder

The airplane parked at your gate usually flew somewhere else first. This is how I find that previous flight, and what DelayGuard does with it.

Updated 2026-10-18

01
Open your airline's flight page
Start in your airline's app or on the flight status page on the airline's website. Search your flight number and date.
Look for the aircraft, the tail number, or the registration on that flight. Airlines label this differently. This guide does not name a control inside a specific app.
02
Copy the tail number
The tail number is the aircraft registration. You may see it in those airline flight details, or in the details on the FlightAware page for the same flight.
US tail numbers use the FAA format, which starts with N. Copy the whole registration, letters and digits together.
03
Open that airplane's previous flight
Search the registration on FlightAware. The list is the flights that airframe has operated. The one immediately before yours is the inbound.
Use the plain FlightAware site. This is not an affiliate link.
04
Check again if the tail changes
If the registration on your flight changes, the previous flight changes with it. Look the new tail up the same way.

Why the inbound changes

Airlines swap airplanes. The planned aircraft may still be finishing an earlier flight, be in maintenance, or be needed on another departure.

A swap is a new assignment, not a new fact about the old tail. The flight you looked up for the first registration is no longer the one coming in for yours.

What DelayGuard checks

DelayGuard looks up live departure status only for the flight you request, and only when that departure is inside the window from 12 hours ahead to 3 hours in the past. In the code that window is hours until departure from −3 to +12.

Inside the window, the live figure is that flight's own departure delay. DelayGuard does not look up the previous flight of the same aircraft.

Outside the window, or when no live data comes back, the rotation part of the score follows the scheduled departure hour instead of a live departure delay.

Why the previous flight matters

BTS attributes the largest share of late arrivals to late-arriving aircraft: the prior leg of the same aircraft ran late, so this departure is delayed. Weather, carrier issues and national airspace system congestion also contribute. This is why delays compound through the day and morning flights are more reliable.

Airport delay rankings

Check your own flight

Enter your flight number on the predictor. DelayGuard scores that flight. Finding the inbound aircraft is the FlightAware step above.

Check your own flight

Questions

How do I find where my plane is coming from?

Open your airline's app or the flight status page on the airline's website and find the tail number, which is the aircraft registration. You can also read that registration in the details on the FlightAware page for your flight. Search the registration on FlightAware to see the flights that airplane has operated, including the one before yours.

Where do I find the tail number?

Look in the flight details in your airline's app or on the airline's website, or in the details on the FlightAware page for that flight. The tail number is the aircraft registration. This guide does not name a button inside a specific airline app, because those labels differ and are not cited from an airline page here.

Why can the inbound aircraft change?

The airline can assign a different airplane to your flight. That happens when the planned airplane is still on an earlier flight, is in maintenance, or is needed on another departure. After a swap, the tail number changes, and the previous flight you looked up is no longer the inbound for your departure.

Does DelayGuard look up the previous flight of my aircraft?

No. DelayGuard looks up live departure status only for the flight you request, and only when that departure is inside the window from 12 hours ahead to 3 hours in the past. The figure is that flight's own departure delay. It is not a lookup of the previous flight of the same aircraft. Outside the window, or when no live data comes back, the rotation part of the score follows the scheduled departure hour instead of a live departure delay.