As with most major Airports what time you arrive at BWI will depend on a number of factors including your airline, weather, seasonality and day of the week. Being the busiest airport serving the area, more so than nearby Washington Dulles & Reagan Airports means long security lines can occur relatively often. AS a general guide we would suggest you plan on arriving 3 hours before an international flight and 2 hours for a domestic flight.
You can view the BWI TSA wait times, PreCheck locations and the currently lane openings in the information above. TSA PreCheck membership can lead to significantly reduced BWI security wait times. To find out more about joining or renewing TSA PreCheck membership visit https://www.tsa.gov/precheck. It's also worth being aware that CLEAR is available at BWI. You can find out more here.
We have not collected much feedback about the security wait times for international arrivals at BWI. However, BWI often ranks badly for departure security wait times so travelers arriving at Baltimore Airport might expect a lengthy wait. For travelers with connecting flights at BWI, we suggest making sure you have a decent time window between flights.
For further information about the Baltimore Washington International Airport wait times, TSA security, carry on bag screening, lost and found and more visit https://www.bwiairport.com