Perfumes like Olyssia by Sylvaine Delacourte: closest alternatives
The closest matches to Olyssia by Sylvaine Delacourte are Pretty Machine by Kerosene (78% match), Aqua Vitae Forte by Maison Francis Kurkdjian and Orange Blossom by Penhaligon's. Each alternative below is ranked by how closely its accords, notes, seasons and wearer votes line up, from any brand.
Closest alternatives

Kerosene
Pretty Machine
2013 · unisex
7.1 (100 ratings)
78% match · shares floral, citrus, fresh

Maison Francis Kurkdjian
Aqua Vitae Forte
2015 · unisex
7.4 (474 ratings)
77% match · shares floral, fresh, citrus

Penhaligon's
Orange Blossom
2010 · unisex
7.3 (110 ratings)
78% match · shares floral, fresh, Neroli

Guerlain
Aqua Allegoria Nerolia Bianca
2013 · for women
7.3 (209 ratings)
77% match · shares floral, fresh, citrus

Chopard
Néroli à la Cardamome du Guatemala
2017 · unisex
7.6 (77 ratings)
78% match · shares fresh, floral, citrus

Atelier Cologne
Sud Magnolia
2015 · unisex
6.4 (84 ratings)
77% match · shares floral, fresh, citrus

Evody
Collection Première - Fleur d'Oranger
unisex
6.8 (62 ratings)
77% match · shares floral, fresh, citrus

Czech & Speake
Neroli (Cologne)
1981 · unisex
6.7 (39 ratings)
77% match · shares floral, fresh, citrus

Penhaligon's
Castile
1998 · unisex
7.3 (103 ratings)
76% match · shares fresh, citrus, floral

Serge Lutens
Fleurs d'oranger
1995 · unisex
7.4 (632 ratings)
74% match · shares floral, Neroli, Orange blossom

Roja Parfums
A Midsummer Dream
2016 · unisex
8.0 (1,717 ratings)
73% match · shares floral, fresh, citrus

Miller Harris
Lumière Dorée
2016 · unisex
7.0 (99 ratings)
75% match · shares fresh, floral, citrus

J.F. Schwarzlose Berlin
1A-33 (2012)
2012 · unisex
7.6 (586 ratings)
74% match · shares floral, fresh, citrus

L'Orchestre Parfum
Flamenco Néroli
2017 · unisex
7.0 (62 ratings)
76% match · shares fresh, floral, citrus

Hermès
Eau de Néroli Doré
2016 · unisex
6.8 (145 ratings)
75% match · shares floral, fresh, citrus

Ferrari
Bright Neroli
2015 · unisex
7.6 (434 ratings)
73% match · shares fresh, citrus, floral

Annette Neuffer
Rosa Alba
2015 · unisex
7.8 (56 ratings)
75% match · shares floral, citrus, Orange blossom

Guerlain
Eau de Cologne du Coq
1894 · unisex
7.5 (130 ratings)
74% match · shares fresh, citrus, floral

Le Labo
Fleur d'Oranger 27 EDP
2006 · unisex
7.1 (132 ratings)
74% match · shares floral, fresh, citrus

Atl. Oblique
White Light
2018 · unisex
6.8 (51 ratings)
75% match · shares floral, fresh, citrus

Bortnikoff
Amber Cologne
2019 · unisex
7.9 (342 ratings)
73% match · shares floral, fresh, citrus

Memo Paris
Kedu
2014 · unisex
7.4 (211 ratings)
73% match · shares floral, fresh, citrus

Creed
Les Royales Exclusives - Jardin d'Amalfi
2011 · unisex
8.0 (195 ratings)
73% match · shares fresh, citrus, floral

Bottega Veneta
Knot
2014 · for women
7.3 (384 ratings)
72% match · shares floral, fresh, citrus
How matching works
Every perfume is compared on up to five signals. Community accord votes weigh the most, followed by notes, where rare notes count more than common ones like musk. Note families, seasons and the men, women or unisex leaning make up the rest.
The brand is never used, so a match from another house is as likely as one from the same house. When a perfume has no data for a signal, that signal is skipped instead of counted as zero.