| 1999 Flanders Women's Open | |
|---|---|
| Date | 10–16 May |
| Edition | 6th |
| Category | Tier IV |
| Draw | 32S / 16D |
| Prize money | $112,500 |
| Surface | Clay / outdoor |
| Location | Antwerp, Belgium |
| Champions | |
| Singles | |
.svg.png.webp){kind=small} Justine Henin | |
| Doubles | |
 Laura Golarsa /  Katarina Srebotnik | |
The 1999 Flanders Women's Open was a women's tennis tournament played on outdoor clay courts in Antwerp, Belgium that was part of the Tier IV category of the 1999 WTA Tour. It was the sixth edition of the tournament and was held from 10 May until 16 May 1999. Unseeded Justine Henin, who entered on a wildcard, won the singles title and the accompanying $16,000 first-prize money.
Finals
Singles
Justine Henin defeated 
Sarah Pitkowski, 6–1, 6–2
- This was future World No. 1 Henin's first WTA title.
Doubles
Laura Golarsa / Katarina Srebotnik defeated .svg.png.webp){kind=small}
Louise Pleming / 
Meghann Shaughnessy, 6–4, 6–2
Entrants
Seeds
| Country | Player | Rank | Seed |
|---|---|---|---|
| FRA |
Sarah Pitkowski | 35 | 1 |
 LUX |
Anne Kremer | 40 | 2 |
 NED |
Miriam Oremans | 48 | 3 |
| FRA |
Alexia Dechaume-Balleret | 52 | 4 |
| ITA |
Rita Grande | 53 | 5 |
| FRA |
Amélie Cocheteux | 55 | 6 |
 PUR |
Kristina Brandi | 58 | 7 |
| USA |
Jane Chi | 64 | 8 |
Other entrants
The following players received wildcards into the singles main draw:
The following players received wildcards into the doubles main draw:
The following players received entry from the singles qualifying draw:
The following players received entry as lucky losers:
The following players received entry from the doubles qualifying draw:
The following players received entry as lucky losers:
