Every connection graded A to F: how likely a missed connection is, and how late one would leave you.

Enter your trip and GateCast checks it against a year of real US flight-delay data, so you can see the odds before you book.

Flights and times come from the airport's schedule where it covers your date, and otherwise from last year's schedules. Check the airline for the current timetable.

Some international flights aren't graded yet.

What the grades mean

We work out the time you really have: getting off the aircraft, the walk or train between gates, any security re-screening, and when your next flight closes boarding. Direct flights get a grade too, for how often they run late or get cancelled. On a round trip, your outbound and return each get their own grade. We never invent a single combined score.

We also grade connections at five Brazilian hubs, from ANAC records — see how we grade flights in Brazil.

AMissed connection on fewer than 15% of days like this one
BMissed connection on fewer than 30% of days like this one
CMissed connection on fewer than 50% of days like this one
DMissed connection on fewer than 70% of days like this one
FMissed connection on 70% or more of days like this one

Connection guides

All guides →
ATL Atlanta

Connecting at Atlanta: one security line, one train, Delta's home

Connecting at Atlanta (ATL), the world's busiest airport? Once you're through security, every concourse connects behind it, linked by the Plane Train.
AUS Austin

Connecting at Austin: one terminal, and the old South Terminal is gone

Changing planes at Austin (AUS)? Every airline now uses one terminal and all four security checkpoints lead to all gates. Older advice about a separate South Terminal is out of date.
BNA Nashville

Connecting at Nashville: the satellite gates and the bus across the apron

Connecting at Nashville (BNA)? Most gates are a walk apart, but gates C4–C11 are a bus ride across the apron. How to plan it, from a pilot.