Filament deals
Prime Big Deal Days 2026 filament deals
329 filaments on Amazon UK are below their usual price right now. We've picked out the gems: the ones well below what they usually cost.
- below usual
- 329
- gems
- 79
- cheapest
- £7.22/kg
- most below usual
- 58%
Prime Big Deal Days 2026 is on until the end of Wednesday 7 October. Prices are re-checked through the day, so new gems turn up as Amazon starts new deals. We left out 33 recent price drops that only take a reel back to its usual price.
The gems
In stock and at least 25% below their usual 90-day price, or 15% below it at the lowest price we've ever tracked. Furthest below usual first, two per brand.
Lightning deals ending soonest
Amazon's short deals with a timer and limited stock. They can sell out before the clock runs down.
Live prices
Prices checked 5 Oct, 03:00 – 6 Oct, 09:20 (UK time) and may change.We earn a small commission if you buy. Your price stays the same.
About prime day
Amazon usually runs Prime Day in July, and Prime Big Deal Days in October. Many filament deals during both are Prime-only, which SpoolDeal shows on each card.
Every price on SpoolDeal is checked against our own price history, so a discount only counts when the price is genuinely lower than it has been, not just lower than an inflated list price.
If you are waiting for a particular reel, set a target price alert on its product page and we will email you the moment it gets there.
Common questions
When is Prime Big Deal Days 2026?
Prime Big Deal Days 2026 runs on Amazon UK from Tuesday 6 October 2026 to Wednesday 7 October 2026. Prime-only prices are marked on each card.
Do I need Prime for Prime Day filament deals?
For most of them, yes. Prime-only prices are marked on each card here, and the product page shows the price without Prime.
What makes a deal a gem?
A reel that's in stock and at least 25% below its usual price (the middle of the prices we recorded over the last 90 days), or at least 15% below it and at the lowest price we've ever tracked. Amazon's “was” price is never used.
Are Prime Day discounts real?
Not always. Some prices go up in the weeks before a sale and come back down for it, which looks like a discount but isn't. We compare every price with our own 90-day history, so a drop only counts here when the price ends up below what the reel usually costs. Right now 33 recent price drops only take a reel back to its usual price.
How much did filament prices fall in Prime Big Deal Days 2025?
During Prime Big Deal Days 2025 (7 – 8 October 2025), the typical filament listing we track fell 0% below its usual price at its lowest, and 45% of 1,283 listings were at least 5% below their usual price at some point. The figures come from our monthly filament price index.
How SpoolDeal checks prices
The same rules on every page, so a deal badge means the same thing everywhere.
Re-checked through the day
Every tracked listing on Amazon UK and Eryone UK is re-checked through the day, and the most-watched ones every two hours.
Measured against our own history
A deal only counts when the price is below what that reel has actually sold for over the last 90 days, not a seller's “was” price.
An email when it drops
Set a target price on any reel with a free account and we email you when it gets there.
More filament deals
Get new All filament deals deals by email
When something here drops below its usual price, by our own price history, we'll email you. One email a day at most, and every one has a one-click unsubscribe.