The instrument · one mark for every day it actually happened

Tight Connection

You have fifty minutes in Atlanta. Is that enough? Nobody can tell you what your day will do. This tells you what every other day did: your two real flights, joined date by date out of the federal record, so the days the connection failed are days it actually failed, and you can go and check any of them.

United States domestic flights only, and that is not a bug. This reads the record the US Department of Transportation requires its reporting carriers to file. A flight outside that system, or sold to you under a partner airline's number, is not in it, and this page says so rather than guessing.

Your itinerary

The flight you arrive on

Carrier and number, as printed on the ticket.

The flight you leave on

Leave this empty and the answer becomes an upper bound instead.

Minutes between them

Filled in from the record when both flights are known. Overwrite it with what your itinerary says.

The year of days

a day you would have made it a day you would not the inbound never arrived

Minutes you need on the ground

Off the aircraft, along the concourse, onto the next one before the door shuts. Nobody publishes that number in a form we could check, so we will not invent one for you. Move it, and watch the answer move.

How the answer moves

Every point is a count of real days, not a fitted curve.

The same year, month by month

The days it failed

date	inbound	onward	you would have had

Lift the hood: the arithmetic, exactly

The URL grammar: every answer here is a link

parameter	values	meaning
in	DL1234	the flight you arrive on
out	DL5678	the flight you leave on, if it is in the record
at	ATL	the airport you connect at, when the number flew more than one route
gap	50	scheduled minutes between the two
need	45	minutes you say you need on the ground

A state this grammar cannot carry clears the query rather than leaving a stale one, so a link you copy always points at the answer you were shown. layover.artwaste.land serves this same page and the same grammar, and is the shorter thing to hand somebody: layover.artwaste.land/?in=DL309&out=DL996&gap=66&need=45.