The three American hubs you'll most likely connect through
American funnels most US, Latin America traffic through these three. Each one connects differently. (American's broader connecting-hub network also includes Washington National, the two New York airports, Los Angeles, Chicago O'Hare and Phoenix.)
MIA is American's main hub connecting the US with the Caribbean and Latin America, so it's where most of our travelers connect. On an international arrival you clear customs, re-check your bag and re-clear security, and you may have to move between concourses in a long terminal. Miami connections have a reputation for being tight, if yours is short, treat it as a risk, not a given.
DFW has five terminals connected by Skylink, a free train that runs inside security about every two minutes with a roughly five-minute ride and two stops per terminal. The international terminal (Terminal D) is on the same train, and DFW uses color-coded signage to speed up customs. Domestic-to-domestic connections here rarely leave the secure area.
Charlotte has no trams or shuttles between concourses, every gate sits under one roof and all concourses are reachable from any security checkpoint, so a domestic connection is usually just a walk. International arrivals still clear customs and re-check bags, and Mobile Passport Control can speed the entry line.
Note on the Miami read above: that's our own analysis, not an American Airlines rule. American doesn't publish a minimum-connection-time for MIA or any airport, this is BargainAirTicket's assessment of why arriving international passengers find MIA connections tight (immigration, bag re-check, sometimes a terminal change), based on how the airport and US entry process work. Treat it as planning guidance, and confirm your specific connection when you book.
Terminal and gate assignments change; confirm yours on the American app or at aa.com the day you fly.
Arriving from Latin America into the US
The part most travelers underestimate, the customs-and-recheck sequence at your first US airport.
No matter how the ticket was sold, the United States requires you to enter the country at your first point of arrival. That means immigration, then bag claim, then customs, then handing your bag back and passing through security again, before you're even walking toward your connecting gate. It doesn't matter that your bag is tagged to the final city; you still collect it and re-drop it here.
Two things make this faster: Global Entry (skip the main immigration line) and Mobile Passport Control (a free CBP app that shortens the entry step). On a same-day international-to-domestic connection, either one can be the difference between making it and watching your onward flight push back.
Entry, customs and eligibility rules are set by US Customs and Border Protection, not the airline. Check current requirements at cbp.gov before you travel.
Domestic-to-domestic connections
When both flights are inside the US, it's far simpler, but not automatic.
If neither flight touches customs, you stay inside the secure area the whole time; there's no bag to collect and no security line to redo. Your only job is to get from the arrival gate to the departure gate before boarding closes, which at a big hub can still be a real distance. At DFW that's a Skylink train ride; at Charlotte it's a walk under one roof; at Miami it can mean changing concourses. Watch the app for a gate change the moment you land. American reassigns gates constantly, and the new one can be a train ride away.
How much connection time is really enough?
American doesn't publish a customer-facing minimum, so "bookable" and "comfortable" aren't the same thing.
American does not publish a public minimum-connection-time policy that we can point you to, and we won't invent one. Booking systems generally won't offer an itinerary that's obviously too short to be flown, but that's a technical scheduling cutoff, not a customer guarantee, and American doesn't explain or publish it. What follows is our own analysis, not American's: that technical minimum assumes everything runs on time and treats an international recheck the same as a quick domestic hop. In the real world, a late inbound flight, a long immigration line, or a gate at the far end of the terminal can swallow that cushion whole.
Our rule of thumb: give an international-to-domestic connection generous time, you're doing customs and a re-check, and don't trust the tightest Miami layover the booking engine offers. If your connection looks short, call us before you book and we'll tell you whether it looks realistic, and price a safer option.
We don't quote a specific number of minutes because American doesn't publish one for us to cite, an agent talks through the realistic picture for your exact routing instead.
Booked on two separate tickets? Read this first
Self-transferring between separate tickets is the single biggest way a "connection" stops being protected, and it's on you, not American.
If your two flights are on separate tickets, even both on American, they're not one itinerary, and getting yourself from one to the other is a self-transfer at your own risk. Your bag generally won't be through-checked to the final city, so you'd collect and re-check it yourself; and if the first flight is late, American has no obligation to protect the second one or rebook you for free. You're the one absorbing the risk. On a single through-ticket booked as one itinerary, a missed connection caused by American is theirs to fix, see below.
If you're not sure whether your trip is one ticket or two, that's exactly the kind of thing worth a two-minute call before you fly, we can check it and, if needed, rebuild it as a protected single itinerary.
If you miss the connection
What to do in the first five minutes.
If you misconnect on a single American itinerary because of a problem American caused, American rebooks you on the next available flight at no charge, and other duty-of-care help may apply depending on the cause. The move is to get in line and get us on the phone at the same time, the next open seats go to whoever asks first, and standing in one queue while we work another doubles your chances. Our full playbook for late and canceled flights lives on the Delays & rebooking guide.
Before you fly, the connection checklist
Thirty seconds now saves a sprint through the terminal later.
- Is this one ticket or two? A separate second ticket isn't a protected connection
- Does the layover cross customs? If so, add time for bag claim, customs and re-check
- Global Entry or Mobile Passport? Either shortens the US entry line on arrival
- Check the app on landing, American reassigns gates constantly, especially at DFW and Miami
The cheapest itinerary is sometimes the one with the impossible connection. Before you book the tight Miami layover to save an hour, let us price the next connection out. Missing a flight costs far more than the fare you saved.
Frequently asked
Do I have to collect and re-check my bag when I connect through the US?+
Is a short connection in Miami enough time?+
How do I get between terminals at Dallas Fort Worth?+
What happens if I miss my connecting American flight?+
Contact options
Reach American directly, or let us check your connection is realistic.
Contact American Airlines directly
The airline's own official channels, free.
These are American's own channels; confirm your terminals and connection at aa.com.
More American Airlines help
Related guides.