BWI Security Wait Times at Baltimore/Washington International Thurgood Marshall Airport can vary depending on time of day, season, and passenger volume. Early mornings, weekends, and holidays often experience longer lines, while mid-day travel is usually faster. The airport provides TSA checkpoints with PreCheck lanes to reduce waiting times for eligible travelers. On average, security wait times may range from 5 to 30 minutes, but peak periods can extend beyond that. Arriving at least two hours before domestic flights is recommended. Checking real-time updates before heading to the airport helps passengers plan efficiently and avoid unnecessary delays during busy travel periods.