September 4, 2026
7-Night Northern Europe & Fjords Cruise
Departing from Kiel
From
$1,735
Price / day
$248
Costa Diadema|Costa Serena
Costa Diadema vs Costa Serena
Compare ship age, size, passenger capacity, itineraries and upcoming cruise prices.
VS
Newer Ship
Costa Diadema
Built in 2014
7 years newer
Lower Price Per Day
Costa Diadema
$259 / day
$77 less per day
More Spacious Ship
Costa Serena
30.2 GT per guest
Gross tonnage divided by passenger capacity
Costa Diadema vs Costa Serena: Quick Comparison
Costa Diadema is the newer ship in this comparison. Built in 2014, it is 7 years newer than Costa Serena, which entered service in 2007. Costa Diadema is approximately 17% larger by gross tonnage at 133,019 GT. Costa Diadema also carries 1,167 more passengers. Costa Diadema has upcoming sailings in Northern Europe & Fjords, while Costa Serena has sailings in Asia. Based on the upcoming cruises currently displayed, Costa Diadema has the lower average starting price per day. The sailings shown cover different itineraries, so the price per day figures are not a like-for-like comparison. Cruise fares vary significantly by itinerary, departure date and cabin availability, so any price difference should be treated as a snapshot rather than a permanent gap.
Ship Comparison
| Spec | Costa Diadema | Costa Serena |
|---|---|---|
| Year Built | 2014Newer | 2007 |
| Gross Tonnage | 133,019 GT | 114,147 GT |
| Passenger Capacity | 4,947 | 3,780 |
| Space per Passenger | 26.9 GT | 30.2 GT |
| Length | 306 m | 289.6 m |
| Decks | — | — |
| Cabins | — | — |
Key Differences: Costa Diadema vs Costa Serena
Age
Costa Diadema was built in 2014, making it 7 years newer than Costa Serena, which was built in 2007.
Size
At 133,019 GT, Costa Diadema is approximately 17% larger by gross tonnage than Costa Serena at 114,147 GT.
Passenger capacity
Costa Diadema carries up to 4,947 passengers compared with 3,780 aboard Costa Serena, a difference of 1,167 passengers.
Passenger space
Costa Serena offers more space per passenger: 30.2 GT per guest, compared with 26.9 aboard Costa Diadema. A higher passenger space ratio generally means less crowding in public areas.
Itineraries
The upcoming sailings shown for Costa Diadema (Northern Europe & Fjords) and Costa Serena (Asia) currently cover different regions or departure ports.
Price
Among the upcoming sailings currently displayed, Costa Diadema has the lower average starting price per day at $259 per day.
Compare Ports of Call
Costa Diadema
Northern Europe & Fjords from Kiel
- Departure Port
- Kiel
- Region
- Northern Europe & Fjords
- Nights
- 7
- Round Trip
- Yes
- Day 1 · Sep 4, 2026Kiel
- Day 2 · Sep 5, 2026Copenhagen
- Day 3 · Sep 6, 2026At Sea
- Day 4 · Sep 7, 2026Hellesylt
- Day 5 · Sep 8, 2026Geiranger
- Day 6 · Sep 9, 2026Olden
- Day 7 · Sep 10, 2026Stavanger
- Day 8 · Sep 11, 2026At Sea
- Day 9 · Sep 12, 2026Kiel
Dates are estimates based on the published departure date.
Costa Serena
Asia from Busan
- Departure Port
- Busan
- Region
- Asia
- Nights
- 4
- Round Trip
- No
- Day 1 · Sep 2, 2026Busan
- Day 2 · Sep 3, 2026Sasebo
- Day 3 · Sep 4, 2026At Sea
- Day 4 · Sep 5, 2026Shanghai
- Day 5 · Sep 6, 2026Seogwipo
Dates are estimates based on the published departure date.
Upcoming Cruises & Prices
Costa Diadema
September 5, 2026
7-Night Northern Europe & Fjords Cruise
Departing from Copenhagen
From
$1,885
Price / day
$269
Costa Serena
September 2, 2026
4-Night Asia Cruise
Departing from Busan
From
$1,428
Price / day
$357
September 2, 2026
1-Night Asia Cruise
Departing from Busan
From
$314
Price / day
$314
Prices shown are starting fares and may change.
Which Ship Is Cheaper?
Costa Diadema
Average
$259 / day
VS
Costa Serena
Average
$336 / day
Costa Diadema has the lower price per day among the sailings shown
$259/day vs $336/day
About $77 less per day
This comparison is based on the upcoming sailings currently shown and may not represent like-for-like itineraries.
Cruise prices vary by departure date, itinerary, cabin type and availability.
Which Ship Should You Choose?
Choose Costa Diadema if…
- You prefer the newer ship.
- You prefer the larger ship by gross tonnage.
- You do not mind sailing on a ship with a higher passenger capacity.
- You want to sail in Northern Europe & Fjords.
- Departing from Kiel and Copenhagen works for your plans.
- The lower price per day among the sailings currently shown matters to you.
Choose Costa Serena if…
- You prefer the ship with the lower passenger capacity.
- You value having more space per passenger (higher GT-per-guest ratio).
- You want to sail in Asia.
- Departing from Busan works for your plans.
- You do not place as much importance on sailing on a newer ship than Costa Diadema.
Costa Diadema vs Costa Serena: Final Comparison Summary
Newer
Costa Diadema
Built in 2014
7 years newer
Bigger
Costa Diadema
133,019 GT
17% larger by gross tonnage
Lower Price Per Day
Costa Diadema
$259 / day
About $77 less per day
- Costa Diadema is 7 years newer.
- Costa Diadema is 17% larger by gross tonnage.
- Costa Diadema carries 1,167 more passengers.
- Costa Serena offers more space per passenger (30.2 GT per guest).
Frequently Asked Questions
Which is newer, Costa Diadema or Costa Serena?
Costa Diadema is newer. It was built in 2014, while Costa Serena was built in 2007, making Costa Diadema 7 years newer.
Which is bigger, Costa Diadema or Costa Serena?
Costa Diadema is larger by gross tonnage. It measures approximately 133,019 GT compared with Costa Serena at 114,147 GT.
Which ship carries more passengers?
Costa Diadema has a passenger capacity of approximately 4,947, compared with 3,780 for Costa Serena.
Which ship is more spacious, Costa Diadema or Costa Serena?
Costa Serena has the higher passenger space ratio at 30.2 GT per passenger, versus 26.9 for Costa Diadema. The ratio is gross tonnage divided by passenger capacity; a higher number means more ship space per guest.
Which ship is cheaper, Costa Diadema or Costa Serena?
Among the upcoming sailings currently displayed, Costa Diadema has the lower average starting price per day at $259 per day versus $336 per day. Fares vary by itinerary, departure date, cabin type and availability.
Where does Costa Diadema sail?
The upcoming Costa Diadema sailings currently listed cover Northern Europe & Fjords, departing from Kiel and Copenhagen.
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