$107/nt
36% drop
Costa Diadema
10 Night Western Mediterranean
- Depart:
- Barcelona, Spain
- Date:
- Oct 9, 2026
- Length:
- 10 nights
- Cabin:
- inside
Starting at
$1,076
36%
Price Drops for Costa Diadema
All upcoming Costa Diadema sailings with the biggest savings, sorted by price drop percentage.
Filter:
- September 2026
- October 2026
- inside
- oceanview
- balcony
- suite
Showing 14 deals
$131/nt
28% drop
Costa Diadema
10 Night Western Mediterranean
- Depart:
- Barcelona, Spain
- Date:
- Oct 9, 2026
- Length:
- 10 nights
- Cabin:
- oceanview
Starting at
$1,310
28%$197/nt
22% drop
Costa Diadema
10 Night Western Mediterranean
- Depart:
- Barcelona, Spain
- Date:
- Oct 9, 2026
- Length:
- 10 nights
- Cabin:
- balcony
Starting at
$1,976
22%$142/nt
17% drop
Costa Diadema
10night Western Mediterranean
- Depart:
- Savona (genoa), Italy
- Date:
- Oct 8, 2026
- Length:
- 10 nights
- Cabin:
- inside
Starting at
$1,426
17%$174/nt
11% drop
Costa Diadema
11 Night Western Europe & Western Mediterranean
- Depart:
- Copenhagen, Denmark
- Date:
- Sep 12, 2026
- Length:
- 11 nights
- Cabin:
- suite
Starting at
$1,919
11%$146/nt
9% drop
Costa Diadema
11 Night Western Mediterranean
- Depart:
- Barcelona, Spain
- Date:
- Sep 28, 2026
- Length:
- 11 nights
- Cabin:
- inside
Starting at
$1,609
9%$231/nt
9% drop
Costa Diadema
11 Night Western Mediterranean
- Depart:
- Barcelona, Spain
- Date:
- Sep 28, 2026
- Length:
- 11 nights
- Cabin:
- balcony
Starting at
$2,545
9%$165/nt
9% drop
Costa Diadema
11 Night Western Mediterranean
- Depart:
- Barcelona, Spain
- Date:
- Sep 28, 2026
- Length:
- 11 nights
- Cabin:
- oceanview
Starting at
$1,825
9%$156/nt
7% drop
Costa Diadema
11 Night Western Europe & Western Mediterranean
- Depart:
- Copenhagen, Denmark
- Date:
- Sep 12, 2026
- Length:
- 11 nights
- Cabin:
- balcony
Starting at
$1,721
7%$121/nt
6% drop
Costa Diadema
11 Night Western Europe & Western Mediterranean
- Depart:
- Copenhagen, Denmark
- Date:
- Sep 12, 2026
- Length:
- 11 nights
- Cabin:
- oceanview
Starting at
$1,334
6%$109/nt
6% drop
Costa Diadema
11 Night Western Europe & Western Mediterranean
- Depart:
- Copenhagen, Denmark
- Date:
- Sep 12, 2026
- Length:
- 11 nights
- Cabin:
- inside
Starting at
$1,208
6%$301/nt
4% drop
Costa Diadema
10night Western Mediterranean
- Depart:
- Savona (genoa), Italy
- Date:
- Oct 8, 2026
- Length:
- 10 nights
- Cabin:
- suite
Starting at
$3,016
4%About These Costa Diadema Deals
Every day, we analyze tens of thousands of prices to surface the biggest price drops on Costa Diadema sailings. We compare the latest pricing against our historical averages for each itinerary so you can see exactly how much you're saving. Prices change frequently based on inventory, season, and demand. Bookmark this page and check back often.
How we spot these Costa Diadema price drops
We track cabin prices on every Costa Diadema sailing every day. When a fare drops noticeably from what we've been seeing for that particular itinerary, departure port, and cabin category, it shows up here. The percentage on each deal card is the real drop from the last price we recorded, not some made-up comparison to a higher list price.
Why Costa Diadema price drops are worth a look
Costa adjusts cabin prices regularly based on demand, and that creates real opportunities if you're paying attention. Inside cabins usually have the best per-night rates, while balcony and suite categories can see the steepest absolute drops. The closer a sailing gets to its departure date, the more likely you are to find a steep discount.
How to land the best deal
The more flexible you are on sail months, cabin types, and departure ports, the more deals you'll see. Use the filters above to zero in on what matters to you. It's worth checking back often since the best deals go fast, and new price drops pop up as Costa adjusts fares based on what's selling and what isn't. Bookmark this page so it's easy to come back.