Mattress Sale - Up to 65% Off King Size Mattresses

Excellent

65,122reviews on

About Us Delivery Information Help Centre Advice Centre The Sleep Journal Contact Us

View all Mattresses

Your Basket

Your basket is empty :(

Why not browse our product ranges?

Free delivery to most locations

Free 60-night mattress trial

Old mattress removal service

In Time For Christmas

Ends in...

0 days 2 hrs 44 mins 47 secs

Shop now

Sale

Home

Mattresses

Sale

King Size Mattress Sale

121-140 of 223 products

Filters

King Size

Superking

(206)

6' x 6'6" | 180cm x 200cm

King Size

(223)

5' x 6'6" | 150cm x 200cm

Double

(230)

4'6" x 6'3" | 135cm x 190cm

Small Double

(146)

4' x 6'3" | 120cm x 190cm

Single

(235)

3' x 6'3" | 90cm x 190cm

Small Single

(7)

2'6" x 6'3" | 75cm x 190cm

Superking Zip and Link

(16)

6' x 6'6" | 180cm x 200cm

European King Size

(5)

5'3" x 6'6" | 160cm x 200cm

European Double

(3)

4'7" x 6'6" | 140cm x 200cm

European Single

(1)

3' x 6'6" | 90cm x 200cm

Adjustable Single

(2)

3' x 6'6" | 90cm x 200cm

Adjustable Small Single

(2)

2'6" x 6'6" | 75cm x 200cm

Single Short

(1)

3' x 5'9" | 90cm x 175cm

Small Single Short

(1)

2'6" x 5'9" | 75cm x 175cm

Cot Bed

(2)

2'4" x 4'7" | 70cm x 140cm

Continental Cot

(2)

2' x 4' | 60cm x 120cm

Extra Firm

(14)

Firm

(49)

Medium to Firm

(55)

Medium

(78)

Soft to Medium

(27)

Memory Foam

(67)

Pocket Sprung

(176)

Orthopaedic

(35)

Standard Sprung

(32)

Latex

(14)

Natural Fillings

(66)

Gel Foam

(31)

Reflex Foam

(25)

Rolled Up

(53)

Single-Sided Mattress

(164)

Double-Sided Mattress

(47)

Hypoallergenic

(96)

Pillow Top

(32)

Childrens

(1)

Contract Mattress

(2)

Luxury Mattress

(72)

Eco Friendly

(39)

Silentnight

(37)

Sleepeezee

(27)

Sealy

(17)

Hypnos

(12)

Harrison Spinks

(11)

Millbrook Beds

(13)

Emma

(7)

TEMPUR

(2)

Simba

(9)

Relyon

(12)

SleepSoul

(12)

Wentworth Mercer

(10)

Rest Assured

(3)

Luna

(6)

Mattress Online

(8)

Mlily

(4)

Horizon

(4)

Uno

(1)

Layezee

(2)

Jay-Be

(4)

Romantica

(3)

Bodyshape

(14)

Dunlopillo

(2)

Shire Beds

(1)

£200 - £300

(19)

£300 - £400

(17)

£400 - £500

(25)

£500 - £600

(24)

£600 - £700

(25)

£700 - £800

(16)

£800 - £900

(17)

£900 - £1000

(18)

£1000+

(62)

Sealy Posturepedic Elevate Premier Gel Mattress

3.5

Firm

60-night comfort trial

Free delivery from tomorrow

King Size£1,609.00

RRP £1,999.00

Save15%

Harrison Spinks Luxury Essential 750 Pocket Mattress

New In

We're Collecting Reviews

We're gathering feedback on this product. Only 1 in 20 customers leave a review, so check back soon to see what others think! Rest assured, all products are quality tested to meet our standards.

Medium

60-night comfort trial

Free delivery from tomorrow

King Size£609.95

RRP £849.00

Save25%

Bodyshape Gel 2000 Pocket Mattress

5.0

Medium

60-night comfort trial

Free delivery from tomorrow

King Size£577.00

Was £679.00

RRP £849.00

Save30%

Komfi Unity Memory Deluxe Mattress

New In

We're Collecting Reviews

We're gathering feedback on this product. Only 1 in 20 customers leave a review, so check back soon to see what others think! Rest assured, all products are quality tested to meet our standards.

Medium to Firm

60-night comfort trial

Free delivery from tomorrow

King Size£212.95

RRP £270.00

Save20%

Wentworth Mercer Premium Silk 11000 Pocket Mattress

5.0

Soft to Medium

60-night comfort trial

Free delivery from tomorrow

King Size£1,969.00

RRP £2,211.66

Save10%

Sleepeezee Centurial 03 7000 Pocket Mattress

5.0

Medium

60-night comfort trial

Free delivery from tomorrow

King Size£1,949.00

RRP £2,639.00

Save25%

Komfi Unity Deluxe Mattress

New In

We're Collecting Reviews

We're gathering feedback on this product. Only 1 in 20 customers leave a review, so check back soon to see what others think! Rest assured, all products are quality tested to meet our standards.

Firm

60-night comfort trial

Free delivery from tomorrow

King Size£203.95

RRP £260.00

Save20%

Silentnight Eco Comfort Airmesh 1600

New In

We're Collecting Reviews

We're gathering feedback on this product. Only 1 in 20 customers leave a review, so check back soon to see what others think! Rest assured, all products are quality tested to meet our standards.

Medium

60-night comfort trial

Free delivery from tomorrow

King Size£794.95

RRP £839.00

Save5%

Simba Hybrid Luxe Mattress

5.0

Medium to Firm

60-night comfort trial

Free delivery from tomorrow

King Size£1,764.95

RRP £1,859.00

Save5%

Wentworth Mercer Premium Naturals 8000 Pocket Mattress

We're Collecting Reviews

We're gathering feedback on this product. Only 1 in 20 customers leave a review, so check back soon to see what others think! Rest assured, all products are quality tested to meet our standards.

Firm

60-night comfort trial

Free delivery from tomorrow

King Size£1,699.00

RRP £1,937.52

Save10%

Wentworth Mercer Deluxe Naturals 5000 Pocket Mattress

5.0

Soft to Medium

60-night comfort trial

Free delivery from tomorrow

King Size£1,499.00

RRP £1,685.00

Save10%

Emma Diamond Hybrid Mattress

4.5

Medium

100-night comfort trial

Free delivery from tomorrow

King Size£942.00

Was £1,109.00

RRP £1,619.00

Save40%

Hypnos Hemsworth Deluxe Mattress

4.7

Medium

60-night comfort trial

Free delivery from tomorrow

King Size£679.95

RRP £1,150.00

Save40%

Sleepeezee Perfectly British Strand 1400 Pocket Mattress

4.7

Medium to Firm

60-night comfort trial

Free delivery from tomorrow

King Size£849.00

RRP £1,119.00

Save20%

Bodyshape Classic Memory Foam Mattress

4.5

485

Medium to Firm

60-night comfort trial

Free delivery from tomorrow

King Size£279.95

Millbrook Smooth Tech Luxury 5000 Pocket Mattress

4.3

Medium

60-night comfort trial

Free delivery from tomorrow

King Size£1,719.00

RRP £2,296.28

Save25%

Emma Next Gen Cooling Mattress

New In

We're Collecting Reviews

We're gathering feedback on this product. Only 1 in 20 customers leave a review, so check back soon to see what others think! Rest assured, all products are quality tested to meet our standards.

Medium

100-night comfort trial

Free delivery from tomorrow

King Size£688.74

RRP £1,399.00

Save50%

Simba Hybrid Pro Mattress

4.5

Medium to Firm

60-night comfort trial

Free delivery from tomorrow

King Size£1,329.00

Relyon Prairie 1000 Pocket Mattress

We're Collecting Reviews

We're gathering feedback on this product. Only 1 in 20 customers leave a review, so check back soon to see what others think! Rest assured, all products are quality tested to meet our standards.

Firm

60-night comfort trial

Free delivery from tomorrow

King Size£639.95

RRP £856.00

Save25%

Sleepeezee Perfectly British Regent 2600 Pocket Mattress

4.6

Medium to Firm

60-night comfort trial

Free delivery from tomorrow

King Size£1,049.00

RRP £1,429.00

Save25%

121-140 of 223 products

01709 780 881

Sales Enquiries

Mon-Sat: 9:30am - 5:30pm

Sunday: 10am - 4pm

Customer Service

Mon-Sat: 9:30am - 5:30pm

Sunday: 10am - 4pm

customerservice@mattressonline.co.uk

Trustpilot

MattressOnline.co.uk Ltd is authorised and regulated by the Financial Conduct Authority (FCA FRN 923012) and acts as a credit intermediary and not a lender, offering credit products provided exclusively by Klarna Bank AB (publ). Finance is only available to permanent UK residents aged 18+, subject to status, terms and conditions apply.

Filters

Size (1)King Size

Mattress Firmness

Mattress Type

Brand

Price

Sealy Posturepedic Elevate Premier Gel Mattress

Harrison Spinks Luxury Essential 750 Pocket Mattress

Bodyshape Gel 2000 Pocket Mattress

Komfi Unity Memory Deluxe Mattress

Wentworth Mercer Premium Silk 11000 Pocket Mattress

Sleepeezee Centurial 03 7000 Pocket Mattress

Komfi Unity Deluxe Mattress

Silentnight Eco Comfort Airmesh 1600

Simba Hybrid Luxe Mattress

Wentworth Mercer Premium Naturals 8000 Pocket Mattress

Wentworth Mercer Deluxe Naturals 5000 Pocket Mattress

Emma Diamond Hybrid Mattress

Hypnos Hemsworth Deluxe Mattress

Sleepeezee Perfectly British Strand 1400 Pocket Mattress

Bodyshape Classic Memory Foam Mattress

Millbrook Smooth Tech Luxury 5000 Pocket Mattress

Emma Next Gen Cooling Mattress

Simba Hybrid Pro Mattress

Relyon Prairie 1000 Pocket Mattress

Sleepeezee Perfectly British Regent 2600 Pocket Mattress

Sales Enquiries

Customer Service

Useful Links

Popular Categories