`import csv
    with open('826766072_T_ONTIME.csv') as csv_infile: #import and open CSV
    reader = csv.DictReader(csv_infile)
    total_delay = 0
    flight_count = 0
    flight_numbers = []
    delay_totals = []
    dest_list = [] #create empty list of destinations
    for row in reader:
        if row['ORIGIN'] == 'BOS': #only take flights leaving BOS
            if row['FL_NUM'] not in flight_numbers:
                flight_numbers.append(row['FL_NUM'])
            if row['DEST'] not in dest_list: #if the dest is not already in the list
                 dest_list.append(row['DEST']) #append the dest to dest_list
    for number in flight_numbers:
        for row in reader:
            if row['ORIGIN'] == 'BOS': #for flights leaving BOS
                if row['FL_NUM'] == number:
                    if float(row['CANCELLED']) < 1: #if the flight is not cancelled
                        if float(row['DEP_DELAY']) >= 0: #and the delay is greater or equal to 0 (some flights had negative delay?)
                            total_delay += float(row['DEP_DELAY']) #add time of delay to total delay
                            flight_count += 1 #add the flight to total flight count
    for row in reader:
        for number in flight_numbers:
                delay_totals.append(sum(row['DEP_DELAY']))`