International School of London

Chiswick London

Full IB
International
Ages 3 - 18

Indicative annual tuition

GBP 24,630 – 39,640

Mid-range fees for London

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Indicative figures from the school's most recent published fees. They vary by year group and extras; confirm current fees with the school before applying.

Curriculum: Full IB
Ages: 3 - 18
Type: International
Languages: English, French, Arabic, Japanese, Spanish
Area: Chiswick
Address: 139 Gunnersbury Avenue, London W3 8LG

Last updated 27 September 2026 One of 15 schools we list in London

About International School of London

The International School of London (ISL) is a full IB continuum school in west London, offering the IB Primary Years Programme, Middle Years Programme, and Diploma Programme for students aged 3 to 18. Founded in 1972, ISL is one of the longest-established IB schools in the United Kingdom and has shaped internationally minded graduates for over fifty years.

ISL distinguishes itself through its genuine linguistic diversity — the school supports mother-tongue instruction in over twenty languages and actively celebrates multilingualism as a core part of its identity. This makes it particularly attractive for families from the Middle East, Japan, France, and across continental Europe who wish to maintain their home language alongside English instruction.

Located in Chiswick, one of west London's most sought-after family neighbourhoods, ISL benefits from excellent transport links and a strong sense of community among its internationally diverse parent body. Graduates consistently earn places at top universities across the UK, Europe, and North America.

Facilities and campus

Sports Hall
Science Labs
Library
Music Rooms
Art Studios
Outdoor Play Areas
Cafeteria
Counselling Suite

Accreditations and memberships

As listed by the school. Check with the accrediting body if it matters for your decision.

Location and contact

International School of London

139 Gunnersbury Avenue, London W3 8LG

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Questions parents ask

International School of London follows the Full IB curriculum, catering to students aged 3 - 18.

Indicative annual tuition at International School of London is GBP 24,630 - 39,640, based on the most recent published figures. Fees vary by grade level and additional services — confirm current fees with the school before applying.

International School of London is located at 139 Gunnersbury Avenue, London W3 8LG, in the Chiswick area of London.

You can request information about International School of London's admission process by filling out the inquiry form on this page. Our team will connect you with the school's admissions office.