Originally Posted by
Time traveller
Not sure if this was an issue, but doesn't DCA have a night curfew where airplanes cannot land or depart between certain hours in the night?
Its not a curfew; its a prohibition on aircraft that generate certain levels of noise. Most modern jets do not exceed the maximum permissible threshold for noise, so they are OK to take off and land. The first departures out of DCA these days are in the 5:30 range, and you absolutely will see arrivals into DC (even scheduled now) that land around 1:00 am (AA2222).