St. Louis Lambert International Airport Wait Times & Departure Calculator
Real-time security waits, traffic conditions, and personalized departure times
⏱️ Detailed Wait Times for Airport
📊 Typical Security Wait Times by Time of Day
🚗 Current Traffic Conditions
Peak traffic hours: 5am-8am and 4pm-7pm
Average security wait: 15-25 minutes
💡 Pro tip: Use our calculator below to get real-time traffic from your exact location.
Get Your Recommended Departure Time for STL
Complete Guide to Airport Timing
St. Louis Lambert International Airport (STL) serves the Greater St. Louis region and was once a major TWA hub. Though traffic has decreased since TWA's demise, STL still offers efficient operations and convenient access to downtown St. Louis.
How Early Should I Arrive at STL for a Domestic Flight?
Arrive 2 hours before departure for domestic flights. This allows time for parking, check-in, security screening, and reaching your terminal. STL's security is generally very efficient given the airport's size.
How Early Should I Arrive at STL for an International Flight?
Arrive 3 hours before departure for international flights. STL handles limited international service with extra time needed for check-in and security procedures.
When is STL Most Busy?
STL's busiest periods are 5am-8am and 4pm-7pm. Security lines during these times typically average 20-30 minutes. Southwest has major flight banks during these hours that create peak congestion.
How Much Time Should I Allow for Traffic to STL?
Traffic on I-70 and I-170 can create delays during St. Louis rush hour. From downtown St. Louis, allow 20-30 minutes during normal times, and 25-40 minutes during peak times. Traffic is generally lighter than major metros.
Which STL Terminal Should I Go To?
STL has 2 terminals: Terminal 1 (Southwest, Alaska, and others) and Terminal 2 (American, Delta, United, and others). The terminals are connected by walkways but are quite far apart. Check your airline before leaving to know which terminal for parking and check-in.
💡 Pro Tips for Airport
- ✓ STL is less congested than during TWA hub days - often efficient
- ✓ MetroLink light rail provides direct service from downtown St. Louis
- ✓ Terminal 1 serves Southwest and several carriers
- ✓ Terminal 2 serves American, Delta, United, and others
- ✓ Security generally faster than larger hubs
Frequently Asked Questions
What are current STL wait times?
STL security wait times typically range from 10-45 minutes depending on time of day. Early morning (5-7 AM) and late evening (8 PM+) have the shortest waits at 10-15 minutes. Peak times (7-9 AM and 3-6 PM) can see waits of 30-45 minutes or longer. Use our calculator above for real-time wait times from your exact location, factoring in current traffic and TSA security lines.
How early should I arrive at STL for a domestic flight?
Arrive 2 hours before your domestic flight departure. STL requires time for the drive (20-40 minutes from downtown), parking or MetroLink arrival (10-15 minutes), check-in and bag drop if needed (10-15 minutes), security screening (15-30 minutes depending on time of day), and walking to your gate (5-10 minutes). STL is generally efficient with lighter traffic than when it was a major TWA hub, making the 2-hour buffer adequate.
How long does security take at STL?
Average security wait time is 15-25 minutes, making STL reasonably efficient. During peak hours (5-8am and 4-7pm), expect waits of 20-30 minutes when Southwest flight banks are departing from Terminal 1. STL has less traffic than during its TWA hub days, so security is generally smoother. TSA PreCheck can save 10-15 minutes. Check the MyTSA app for current wait times at your specific terminal before you leave.
Can I take MetroLink to STL?
Yes! MetroLink (St. Louis light rail) Red Line provides direct service to Lambert Airport from downtown St. Louis and other areas. The journey from downtown takes approximately 30-35 minutes. The Lambert Airport station serves both Terminal 1 and Terminal 2 with covered walkways. This is a convenient and affordable alternative to driving and parking, especially during rush hour.
Which STL terminal should I go to?
Check your airline before leaving: Terminal 1 serves Southwest, Alaska, Air Canada, and several other carriers; Terminal 2 serves American, Delta, United, Frontier, and others. The terminals are connected by walkways but are about a 10-15 minute walk apart. If you arrive at the wrong terminal, you can walk or take a shuttle, but it's best to arrive at the correct terminal for check-in. Both terminals are served by the MetroLink station.
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