The best pricing can be found in the month of March. Prices to Belfast from Washington, D.C. Dulles Intl Airport average $896. You can even find prices in March for less than $896, as users have found deals to Belfast from as low as $694. The month of June appears to be one of the more expensive times to travel to Belfast from Washington, D.C. Dulles Intl Airport. Flying in the targeted month can save you up to 27%.
When flying from Washington, D.C. Dulles Intl Airport to Belfast, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.