How early should I get to STL?
Ninety minutes to two hours before departure covers most domestic flights out of STL.
Ninety minutes to two hours before departure covers most domestic flights out of STL.
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A maps app covers the drive to STL. Bag drop, security, and the walk to your gate usually take longer, and they are the steps people misjudge.
Here is the same plan drawn to scale. The first block is travel; the next two are the airport. A checked bag grows one, a far gate grows the other.
Front door to boarding: 2hr 10min
Ninety minutes to two hours before departure covers most domestic flights out of STL. Checking a bag or flying at a peak hour puts you toward the early end of the range.
Lambert runs two terminals a shuttle ride apart (Southwest and most international flights use Terminal 2, the domestic majors Terminal 1), so the airline decides your door. The two do not connect after security, so clearing the checkpoint in the wrong one means going back out and starting over.
Lines are short most of the day; the early-morning Southwest bank in Terminal 2 is the reliable queue. Screening is per concourse (T1 separate for A and C; T2 for E and F), so the queue you see may not help you. The A-gates checkpoint closes earlier in the evening than the others.
The plan allows 20 minutes for a standard lane on a busy but normal morning. With TSA PreCheck, that drops to 10 minutes. A checked bag lengthens the one before it.
MetroLink stops at both terminals from downtown, and I-70 makes the drive quick outside rush hour. It's an easy airport, so there's less reason to pad the estimate here than at most others. The airport runs a shuttle bus between the terminals, so a terminal mistake is fixable if you catch it before security. The shuttle is the free one, the train charges a fare.
For live waits, parking, and terminal maps, check the official STL site.
Terminals, checkpoints and transit change; the official STL site is the live source.
Ninety minutes to two hours before departure covers most domestic flights out of STL. Checking a bag or flying at a peak hour puts you toward the early end of the range. The plan above works back from there through security, bag drop, parking and the drive to a leave-by time.
The plan allows 20 minutes for a busy-but-normal standard lane. With TSA PreCheck it drops to 10 minutes, and you can edit either one to what you actually see. A checked bag lengthens the step before it. Checkpoint detail for STL is under Security at STL above.
Earlier than for a domestic one. International boarding starts 45 minutes before departure instead of 30, which pulls every step earlier. Use the airline desk for bags: documents get checked and counters often close an hour out. That also covers lap infants, unaccompanied minors, and oversized bags. If your boarding pass names a boarding time, match that.
Work backward from departure: boarding, time at the gate, the walk, security, bag drop, parking, then the drive (20 minutes in the default plan). Replace the drive with your own route. The leave-by moment is the first travel row, "Drive to STL" by default.
Taking the train instead? The Amtrak station pages use the same kind of plan without security. Flying from somewhere not listed? The airport leave time calculator has the same rows with your own numbers, and the wake-up time calculator runs it back to the alarm.
Start the plan in the app, and the Lock Screen and Dynamic Island show the time left, with a bar that fills as each step passes.
Glance at it in the terminal without opening the app.
Every step also gets its own alert, and sharing the plan gives whoever is driving the same leave time, with alerts on their phone.
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Ready Time
You know what you need to do. Ready Time helps you know when to start.
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