How do I find my way around a large US hub airport and make a tight connection?

Summary

The steps

1. 1

   Before you land: look up your connecting gate and route

   The best time to plan your connection is before your wheels touch down. Open your airline’s app and confirm your connecting gate number — gates can change, so check again after landing. Then open the airport’s interactive map to understand which concourse your gate is in and how to get there.

   At Hartsfield-Jackson Atlanta International (ATL), the interactive map at atl.com/maps lets you search by concourse, gate number, and amenity. ATL gate numbers start with the concourse letter — T10 is in Concourse T, A15 is in Concourse A — so the gate number alone tells you which concourse to head for. This gate-numbering convention is confirmed in the ATL official FAQ.

   For departure-day timing and check-in steps, see the hub airport departure-day guide.

   Do this

   Open your airline’s app and note your connecting gate number.,Open the airport’s interactive map and locate that gate’s concourse.,Identify whether you need an airside train, walkway, or both.,Note any intermediate steps — CBP, bag re-check — if arriving internationally.

   Example

   A traveler arriving at ATL in Concourse D and connecting in Concourse A can see on the map that both are served by the Plane Train, and plan accordingly before deplaning.

   Best practice

   Check the gate one more time on the departures board as you deplane — gates change more often in the final hour before departure.
2. 2

   Deplane and read the signs immediately

   The moment you step off the jet bridge, look up. Large hub airports post overhead gate-direction signs at every concourse junction — these signs are your fastest navigation tool and are designed to be readable while walking. They typically show gate ranges (e.g. A1–A20 →) and the direction to trains, exits, and baggage claim.

   Do not stop walking to check your phone in a busy corridor. Read the overhead signs first to get your direction of travel, then confirm details on your phone once you are moving or have stepped aside.

   Do this

   Look for overhead gate-direction signs the moment you exit the jet bridge.,Follow the sign for your connecting concourse or the airside train.,Step aside from foot traffic before stopping to check your phone.,Check the nearest departures board to confirm your gate and departure time.

   Example

   At a large hub with a central train station, the overhead signs will direct you to the train platform — follow them rather than guessing which direction to walk.

   Best practice

   Keep your boarding pass visible and your bag compact so you can move quickly through busy corridors.
3. 3

   Use the airside train or walkway to reach your concourse

   Most large US hub airports with multiple concourses provide an airside people mover — an automated train that runs between concourses without requiring passengers to exit the secure area. At Hartsfield-Jackson Atlanta International (ATL), this is the Plane Train: an underground automated people mover on a loop connecting the Domestic Terminal and all seven concourses (T, A, B, C, D, E, F), as well as the International Terminal. Trains run approximately every two minutes. A pedestrian walkway also connects all concourses and the Domestic Terminal. Concourse T is served by the station at the Domestic Terminal end. All of these details are sourced from the ATL official FAQ.

   Board the train in the direction of your concourse. At ATL, the loop runs in one direction, so if you miss your stop you will come back around — but that costs time on a tight connection.

   Do this

   Follow signs to the airside train platform or walkway.,Confirm the direction of travel before boarding.,Count the stops to your concourse so you are ready to exit.,If walking, use the airport map to stay on the correct airside corridor.

   Example

   A passenger connecting from Concourse F to Concourse B at ATL boards the Plane Train and rides through E, D, C, and B — four stops — without leaving the secure area.

   Best practice

   Stand to the right on moving walkways so faster-moving passengers can pass on the left — standard etiquette at US hub airports.
4. 4

   Understand minimum connection times — especially for international arrivals

   Minimum connection time (MCT), as defined in the IATA MCT Basic manual (the International Air Transport Association’s industry-standard reference for MCT definitions and methodology), is the shortest interval considered viable for transferring a passenger and their luggage between two flights at a given airport. MCT values are set per airport, per airline, and per connection type. Individual MCT values are not publicly listed in a single place; confirm with your airline.

   When you book connecting flights on a single ticket, your airline only sells you connections that meet its own minimum. That is a floor, not a guarantee — a delay on your inbound flight can still leave you short. On separate tickets, no system checks the interval for you.

   International-to-domestic connections require extra time. US Customs and Border Protection (CBP) processing occurs at the first US port of entry. After clearing CBP, you typically collect your checked bags and re-check them before proceeding to your domestic departure. This process adds significant time beyond a domestic-to-domestic transfer. Exceptions include preclearance airports abroad (listed at cbp.gov/travel/preclearance) and a small number of routes with remote baggage screening — confirm the process with your airline. The full CBP return process is documented at cbp.gov.

   Do this

   Check whether your connection is domestic-to-domestic or international-to-domestic.,If arriving internationally, confirm with your airline whether you need to collect and re-check bags.,Review CBP’s guidance at cbp.gov before an international connection.,If your layover feels short, flag it with your airline at booking — not at the gate.

   Example

   A traveler arriving from abroad at a US hub on a single ticket has a connection that meets the airline’s international-to-domestic MCT. A delay on the inbound flight eats into that margin — which is why the next step matters.

   Best practice

   For international-to-domestic connections, treat the MCT as a minimum under ideal conditions. Build in extra buffer wherever possible.
5. 5

   If your connection looks tight: act before you land

   If your inbound flight is delayed and your connection is at risk, the time to act is before you land — not after. Check whether your connecting flight is also delayed (it sometimes is, especially if the inbound aircraft is the same plane). If not, alert a flight attendant so they can radio ahead to the gate.

   On a single ticket, your airline is generally responsible for rebooking you if its own delay causes you to miss a connection. Check your airline’s customer service plan for its specific commitments. On separate tickets, you may have no such protection. The US DOT’s Fly-Rights guide (published by the Department of Transportation’s Office of Aviation Consumer Protection) explains what airlines are and are not required to do when delays cause missed connections.

   Do this

   Check your connecting flight’s status on your airline’s app as soon as a delay is announced.,Alert a flight attendant if your connection is at risk — ask them to radio ahead.,On one ticket: speak to gate agents at your arriving gate or the connecting gate about rebooking.,On separate tickets: begin rebooking immediately; do not wait to see if you make it.

   Example

   A passenger whose inbound flight is running late opens the airline app mid-flight, sees the connecting flight is also delayed by a similar amount, and realizes the connection is still viable — saving unnecessary stress.

   Best practice

   Know before you fly whether your itinerary is on one ticket or two. That single fact determines who is responsible if something goes wrong.
6. 6

   At the connecting gate: confirm, then board

   When you reach the concourse of your connecting flight, check the departures board for your flight number to confirm the gate — it may have changed since you last looked. Walk to the gate and confirm with the display at the gate door before joining the boarding queue.

   If the gate is empty and the door is closed, do not assume you have missed the flight. Check the departures board for a gate change, and check your airline’s app. Gate changes at large hubs are common and sometimes happen in the final minutes before boarding.

   Do this

   Check the departures board in the concourse for your flight number and gate.,Walk to the gate and verify the gate display matches your boarding pass.,If the gate appears empty, check the app and the nearest departures board for a gate change.,Have your boarding pass ready to scan before joining the queue.

   Example

   A passenger arrives at the gate shown on their boarding pass to find it empty. The departures board shows the flight has moved two gates down — still boarding. Checking the board rather than assuming the flight was missed saves the connection.

   Best practice

   Never rely on a single source for gate information. Cross-check the app, the departures board, and the gate display.
7. 7

   Use the airport’s app or website for real-time maps and information

   Most large US hub airports publish an interactive map on their website or app. These maps let you search by gate number, concourse, and amenity — useful both for planning a connection and for finding food, water, or a charging station during a layover.

   Hartsfield-Jackson Atlanta International (ATL) publishes an interactive map at atl.com/maps where you can search terminals, concourses, gates, and amenities. ATL gate numbers begin with the concourse letter, so searching your gate number takes you directly to the right concourse. This is confirmed in the ATL official FAQ.

   For packing guidance relevant to your carry-on at security, see the TSA carry-on packing guide.

   Do this

   Before travel, find and bookmark your departure airport’s interactive map.,Search your arriving and departing gates to understand the concourse layout.,Use the map to locate amenities (water, food, charging) during a layover.,Recheck the map if a gate change sends you to an unfamiliar part of the airport.

   Example

   A traveler with a two-hour layover at ATL uses atl.com/maps to confirm their connecting gate is in Concourse C, then locates a restaurant in the same concourse rather than backtracking.

   Best practice

   Download the airport’s app or save the map page before you travel — airport Wi-Fi can be slow when you need it most.

How this guide was researched and what it covers

Why large hub airports feel overwhelming — and how to stop them being so

Tight-connection checklist

Worked example: navigating a connection at ATL

What this guide does not cover

About Airport Online

FAQ

How do I find my connecting gate at a large hub airport?

The moment you deplane, look for overhead gate-direction signs — these are the fastest guide at any large hub. Open your airline’s app to confirm the gate number, then cross-check with the nearest departures board. At airports with multiple concourses, like Hartsfield-Jackson Atlanta International (ATL), you may need to take an airside train or walkway to reach the right concourse. Use the airport’s own interactive map — ATL’s is at atl.com/maps, confirmed in the ATL FAQ at atl.com/faq-2 — to plan the route before you land.

What is a minimum connection time and why does it matter?

Minimum connection time (MCT), as defined in the IATA MCT Basic manual, is the shortest interval considered viable for transferring a passenger and their luggage between two flights at a given airport. It varies by airport, airline, and connection type — domestic-to-domestic connections are typically shorter than international-to-domestic ones. When you book on one ticket, your airline only sells you connections that meet its minimum. On separate tickets, no system checks the interval for you, so you carry the risk if the layover is too short.

What should I do if my connection looks too tight after a delay?

As soon as you know your inbound flight is delayed, open your airline’s app and check whether your connecting flight is also delayed — it sometimes is. If not, alert a flight attendant before landing so they can radio ahead. On one ticket, ask gate agents about rebooking options; the airline is generally responsible for missed connections caused by its own delay — see the US DOT Fly-Rights guide at transportation.gov/airconsumer/fly-rights. On separate tickets, you may have no such protection, so act immediately and be prepared to rebook yourself.

How does an international-to-domestic connection work at a US hub airport?

On an international-to-domestic connection, US Customs and Border Protection (CBP) processing happens at the first US port of entry — your hub airport. After clearing CBP, you typically collect your checked bags and re-check them before proceeding to your domestic departure. This process adds significant time beyond a standard domestic-to-domestic transfer. Exceptions include preclearance airports abroad (listed at cbp.gov/travel/preclearance) and a small number of routes with remote baggage screening — confirm the process with your airline. The full CBP process is documented at cbp.gov.

Does Hartsfield-Jackson Atlanta (ATL) have an airside train between concourses?

Yes. ATL’s Plane Train is an underground automated people mover on a loop connecting the Domestic Terminal and all seven concourses — T, A, B, C, D, E, and F — as well as the International Terminal. Trains run approximately every two minutes. A pedestrian walkway also connects all concourses and the Domestic Terminal. Concourse T is served by the station at the Domestic Terminal end. These details are confirmed in the ATL official FAQ at atl.com/faq-2. Use the ATL interactive map at atl.com/maps to locate your specific gates.