Book your MIA or FLL connection through Atlanta on a single ticket, and leave more time than the minimum the airline allows. ATL is Delta’s main hub and one of the busiest airports in the country, so a tight connection can fall apart quickly. Compare options on Miami to Atlanta flights before you commit.
1. Know the layout
ATL’s concourses are labeled T, A, B, C, D, E and F. Concourse F handles most international flights. The domestic terminal, with ticketing, baggage claim and the main security checkpoints, sits at the front of the airport.
2. Use the Plane Train
The Plane Train is an automated underground train that stops at every concourse and the domestic terminal. It runs in a loop beneath the airfield, so you can ride it between any two concourses without going through security again.
- Check your arrival and departure concourses on the airport monitors or in the Fly Delta app.
- Follow the signs down to the train level.
- Pedestrian walkways run alongside the train, which can be handy if the train is crowded.
3. Allow a real buffer
Airlines publish a minimum connection time, but that is the shortest window they will sell, not a comfortable one. If your flights are on the same ticket, the airline must rebook you if you miss the connection. Separate tickets usually mean you must collect your bags, recheck them and clear security again, and a missed flight is generally your own responsibility.
Give yourself extra time if your first flight leaves in the afternoon or evening, when delays tend to build up. Connections that involve an international arrival and customs need a larger cushion.
4. Know what to do during a delay
Act quickly, because seats on later flights fill up.
- Open the airline app first. Rebooking options often appear there before a gate agent can see you.
- Join the service desk line while you wait on the app or phone.
- Ask whether meal or hotel help applies. That depends on the cause of the delay and the airline’s policy.
- Keep your boarding passes and receipts.
If you are stuck overnight, compare nearby options on our hotels page. Your airline may also offer a voucher, so ask first.
5. Plan for a long layover
With several hours to spare, stay airside near your next gate and use the Plane Train to explore other concourses. MARTA rail runs from the airport’s domestic terminal station into the city, but leaving means going through security again. Allow generous time to get back, and check MARTA’s website for current service.
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Before you go
Download your airline’s app, turn on flight notifications, and screenshot your connecting gate information in case the Wi-Fi is slow. Then confirm that your MIA or FLL departure gives you a connection time you are comfortable with.
Compare options on Miami to Atlanta flights before you commit