Best Booster Car Seats Deals Online in the UK (25 Deals Found)

Last Updated - 09/09/2026 Sort By:

Best Choice
My Child

New
MyChild Brundle Group 2/3 Booster Car Seat Black., Backless Booster Seat. Lightweight 700g. From 15kg to 36kg Approx. 4
Padded seat cover and arm rests for comfort

£15.99 £16.99
My Child

New
My Child Brundle Group 2/3 Booster, Grey, 700 g
Padded seat cover and arm rests for comfort

£15.99 £16.99
New
Cozy N Safe Logan Car Seat 9-36kg Group 1/2/3 5-Point Harness Booster 9m-12 Yrs
Plus side impact protection gives you peace of mind your kids are as safe as possible. The Cozy N Safe Logan Group 1/2/3

£47.99
Best Value
Graco

New
Graco Junior Maxi i-Size R129 Highback Booster car seat with cupholders, Suitable from 100-150cm (approx. 3.5 to 12 year
R129 highback booster car seat - Suitable from 100-150cm (3.5 to approx. 12 years)

£34.99 £40.00
New
Kidoola ISOFIX Booster Seat i-Size R129 Child Car Seat for 125–150cm Kids
I-SIZE SAFETY CERTIFIED: Tested and certified to the latest R129 i-Size safety standards, this ISOFIX booster seat suppo

£21.99
11% Off
My Babiie

New
My Babiie MBCSB10 Booster Car Seat - Lightweight at 1kg, Approx. 6-12 Years (125-150cm, 22-36kg), R129, i-Size Backless
CHILD CAR BOOSTER SEAT: The My Babiie basic backless booster is suitable from 125-150cm (approx. 6-12 years, 22-36kg, Gr

£15.99 £17.95
Graco

New
Graco Booster Basic R129 Backless Booster Car Seat, Lightweight at only 1.4kg, Suitable from approx. 7 to 12 years (135-
Lightweight backless booster

£17.99
New
Child Booster Seat Car Childrens Group 2+3 Safety Cushion Kids 3-12YRS (15-36KG)
The universal design is designed to fit 3 in a row in most vehicles. This booster cushion is lightweight and features a

£11.94
COZY N SAFE

New
Cozy N Safe Tambu Booster Car Seat 22-36kg, Backless Booster Seat, Lightweight Portable Child Car Seat, Memory Foam Padd
Group 3 booster seat suitable from 22–36kg (approx. 6–12 years)

£12.99 £13.99
New
Graco Junior Maxi™ i-Size R129 Booster Car Seat 3.5 to 12 Years NEXT DAY TRACKED
The Graco Junior Maxi™ i-Size R129 Booster Car Seat is a reliable and high-quality product designed to provide safety an

£22.99
COZY N SAFE

New
Cozy N Safe Neo i-Size Booster Car Seat 125-150cm, Backless Booster Seat, Lightweight Portable Child Car Seat, Deep Padd
i-Size (R129) booster seat suitable from 125–150cm (approx. 6–12 years)

£13.99 £14.99
23% Off
My Babiie

New
My Babiie MBCSB20 Child Booster Seat - ISOFIX, R129 i-Size 125-150cm (Group 3, 6 to 12 Years Approx.) Portable Kids Car
CHILD CAR SEAT: The My Babiie MBCSB20 backless booster is suitable from 125-150cm (approx. 6-12 years, 22-36kg, Group 3)

£22.99 £29.99
New
Cozy N Safe Kea i-Size Booster Seat 125-150cm Backless Child Seat 6-12 Years
The Cozy N Safe Kea Booster Seat. This booster seat is designed for families with multiple cars or for use by grandparen

£15.99
Littlesgo

New
Littlesgo IFix Booster Seat, i-Size ISOFIX Car Seat, for Child from 125-150cm (3-12 Years, Group 2/3), Portable, Triple
I-Size R129 Certified: IFix Booster R129 is rigorously tested to meet the EU's new i-Size R129.03 standards. More than 2

£23.99 £24.99
New
Graco Junior Maxi™ i-Size R129 Booster Car Seat 3.5 to 12 Years
Weighing in at only 3.4kg, it is easy to install and move between vehicles, making it ideal for families on the go. To m

£35.92
Littlesgo

New
Littlesgo IFix Booster Seat, i-Size ISOFIX Car Seat, for Child from 125-150cm (3-12 Years, Group 2/3), Portable, Triple
I-Size R129 Certified: IFix Booster R129 is rigorously tested to meet the EU's new i-Size R129.03 standards. More than 2

£23.99 £24.99
New
Graco Junior Maxi Lightweight High back Booster Car Seat, Group 2/3 Fossil Brown
Graco® Junior Maxi™ Group 2/3 Highback Booster Seat - Black. The lightweight Junior Maxi™ Group 2/3 highback booster all

£39.92
New
Car Seat Infant Booster Rotating Toddler Baby ISOFIX High Back Seats i-Size 360
The safety of children is our top priority, therefore this car seat has an i-Size approval including side impact protect

£114.62
New
Cozy N Safe Olympus i-Size Car Seat 76-150cm ISOFix Harness Booster Seat
The Olympus also incorporates side impact protection, ensuring your child is safeguarded from all angles in case of a co

£69.99
New
GRACO Junior Maxi R44 Child Toddler Booster Car Seat Group 2/3 15-36 kg 4-12 Y
The Junior Maxi Booster Car Seat by Graco is designed to keep growing big kids safe and comfy. You can effortlessly adju

£36.95
New
Brand new Cuggl Car Booster Seat .. with Isofix
With its sleek design and advanced safety features, this booster seat is a must-have for any parent who wants the best f

£10.80
New
Graco Booster Junior Kids Car Seat Maxi™ i-Size R129 3.5-12 Years Light Weight
Weighing in at only 3.4kg, it is easy to install and move between vehicles, making it ideal for families on the go. To m

£36.92
New
Cozy N Safe Hudson Car Seat 9-36kg Group 1/2/3 ISOFix 25kg Harness Booster
Suitable from 9kg to 36kg (9 Months to 12 years old approx). Weight range: 9kg - 36kg. The Award Winning Cozy N Safe Hud

£74.99
New
SPARCO ISOFIX BOOSTER SEAT – ECE R129 – UNIVERSAL FIT FOR KIDS (RED/GREY)
SPARCO ISOFIX BOOSTER SEAT – ECE R129 – UNIVERSAL FIT FOR KIDS (RED/GREY).

£49.99 £79.99
New
Small Dog Car Seat Washable Pet Booster Car Seats Travel Carrier Bed Bag Basket
Spacious Space: The pet bed is roomy enough for pets to relax and unwind. Let your furry friends enjoy a cozy and comfor

£44.71

25 Booster Car Seats deals are available from: Amazon, eBay stores, starting from £10.80.
The biggest discount we found is 23% on My Babiie MBCSB20 Child Booster Seat - ISOFIX, R129 i-Size 125-150cm (Group 3, 6 to 12 Years Approx.) Portable Kids Car Seat, Comfortable, Compact, Lightweight, Ideal for Travel - Black at Amazon.
The lowest price we found is £10.80 while the highest is £114.62.
Prices for the best Booster Car Seats deals average at £33.38.
Last updated on September 9, 2026.
We scanned these quality online stores and more to deliver you with the best offers online available for Booster Car Seats.