DAY BY DAY by FLY TO THE SKY (플라이 투 더 스카이) has sold 268,000 copies in Korea.
DAY BY DAY certifications and sales
| Country / region | Sales | Certification / source | Certification date / sales as of | |
 Korea |
268,000 | RIAK / Gaon charts |
Korea Sales: 268,000
Certification / note: RIAK / Gaon charts
Certification Date / sales as of:
|
|
| Total sales | 268,000 | (in 1 country) |
Total
Sales: 268,000
(in 1 country)
|
Year-end chart performance for DAY BY DAY
| Chart 2000 | Rank | Sales |
| South Korean Albums (Gaon) |
34 | 263,111 |