Before Sunrise, After Sunset - Time of Day Discounts
The time of day that you embark on your air travels can sometimes affect the price of your airfare and depending on your travel plans there may be times of day that are less expensive. In terms of international travel, the jet lag that occurs for air travelers seems to equal no discount for those red-eye flights, but domestically you may see a difference.
The last flights of the night, and the earliest morning departures are flights to look for in terms of finding an extra discount. Many airlines will discount these less popular travel times, so it is worth checking into.

