The poshest cruise lines right now are the small-ship, ultra-luxury brands: Silversea, Regent Seven Seas and Seabourn sit at the top, with Saga the poshest British line. At the other end, Carnival, Costa and Royal Caribbean are the least posh. If “posh” to you mostly means dressing up, Cunard is still the most formal cruise line at sea, even though its ships are big and its fares are mainstream.
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“Posh” means different things to different people, so we haven’t just gone on reputation. Below we explain how we scored 20 cruise lines, give the full ranking in one table with each line’s dress code and vibe, and then explain the surprises. That includes why the most formal line isn’t automatically the poshest. If you want quality rankings based on guest reviews rather than poshness, see our separate guide to the best and worst luxury cruise lines ranked by real customer reviews.
How we ranked the poshest cruise lines
We scored each line from 0 to 5 on four things you can check, giving a maximum of 20 points:
- Formality. How often there’s a formal or gala night, how strictly the evening dress code applies, and whether jackets, gowns or black tie are expected.
- Exclusivity and space. Ship size, the number of guests on board and how much room each person gets. Lines that only have suites, and ships carrying fewer than 1,000 guests, score highest.
- Service. The crew-to-guest ratio, plus touches like butlers, personalised service and staff who remember your name and your drink.
- Inclusions and price. How much is in the fare (drinks, tips, Wi-Fi, excursions, flights) and the typical price per night, which decides who you’ll be sharing the bar with.
The scores are our judgement, based on each line’s published policies at the time of writing (November 2026). Dress codes change often: Regent, Silversea and Norwegian have all updated theirs since mid-2025. Always check your cruise line’s current rules before you pack.
Posh cruise lines ranked: the full table
| Rank | Cruise line | Score /20 | Evening dress code | Vibe |
|---|---|---|---|---|
| 1 | Silversea | 19 | Elegant Casual; Formal Optional nights on voyages of 8+ days | Discreet old-money polish; butler for every suite |
| 2 | Regent Seven Seas | 18 | Elegant Casual (refined denim allowed); Formal Optional on 16+ nights | Opulent and all-inclusive; chandeliers and art |
| 3 | Seabourn | 18 | Elegant casual; optional formal evenings on longer ocean voyages | Intimate yacht-club feel; caviar on the beach |
| 4 | Saga | 16 | Elegant casual (no denim or polo shirts); 1-2 formal nights | Very British, over-50s, country-house manners |
| 5 | Explora Journeys | 15 | Elevated resort casual; no formal nights | European design hotel at sea |
| 6 | Viking | 13 | Elegant casual; no formal nights | Quiet, cultured, adults only, Scandi calm |
| 7 | Cunard | 12 | Smart Attire nightly; Gala Evenings in black tie | Grand ocean-liner tradition; the most formal at sea |
| 8 | Oceania | 12 | Smart, “effortless sophistication”; no formal nights | Foodie country-club |
| 9 | Fred. Olsen | 12 | Smart casual most nights; optional formal nights | Traditional, friendly, small British ships |
| 10 | Celebrity | 9 | Smart Casual; 1-2 Evening Chic nights | Modern and stylish; “The Retreat” suites are a cut above |
| 11 | P&O Cruises | 8 | Evening Casual; Black Tie nights | Big British resort with dress-up nights |
| 12 | Princess | 8 | Smart Casual; formal night about once a week | Comfortable, classic, mid-market |
| 13 | Holland America | 8 | Smart casual; a couple of Dressy Nights | Gentle, music-led, older crowd |
| 14 | Virgin Voyages | 8 | “Just dress”; red-themed Scarlet Night | Adults-only, trendy, rule-free |
| 15 | Marella | 8 | Relaxed; Dress to Impress night replaces formal night | Easy-going, drinks and tips included |
| 16 | MSC | 7 | Informal; up to two gala nights a week | Lively, Mediterranean; Yacht Club is a posh enclave |
| 17 | Norwegian (NCL) | 6 | Freestyle casual; stricter rules in speciality restaurants | No-fuss, eat when you like |
| 18 | Royal Caribbean | 5 | Casual/Smart Casual; formal or “Wear Your Best” nights | Floating theme park |
| 19 | Carnival | 4 | Cruise casual; Elegant Nights | Party ships, “fun ships” |
| 20 | Costa | 4 | Relaxed; occasional gala-style evenings | Busy, family-friendly, Italian flavour |
Where two lines have the same score, we’ve put first the one with fewer guests per ship.
The most upmarket cruise lines (ranks 1-5)
Silversea
Silversea has the most complete set of posh credentials: every guest has a suite, every suite has a butler, the ships are small, and almost everything is included. For voyages from 1 June 2026, Silversea simplified its rules to two codes after 6pm. Elegant Casual covers most nights, and refined denim is now acceptable. Formal Optional nights, when gowns and dinner jackets come out, apply only on voyages of eight days or more. Cruises of seven days or fewer are Elegant Casual every night.
Regent Seven Seas
Regent calls itself the most inclusive line. Fares cover unlimited shore excursions, speciality dining, drinks, tips and Wi-Fi, and many fares include flights. The ships are the most lavishly decorated in this ranking. It loses a point on formality: since 1 August 2025, Regent’s Elegant Casual code has allowed refined denim and dress trainers in restaurants, and Formal Optional nights are kept for voyages of 16 nights or more.
Seabourn
Seabourn’s ships are small and every suite faces the ocean, and the service is known for being very personal. Evenings on its ocean ships are elegant casual, with optional formal nights on longer itineraries. Its expedition ships are casual throughout. Our Silversea vs Seabourn comparison goes through the differences in detail.
Saga
Saga is the poshest British cruise line. Its two ocean ships carry fewer than 1,000 guests. Every cabin has a balcony, and the fare includes drinks, speciality dining, tips and a chauffeur to the port. It’s also one of the more formal lines left. Saga asks for elegant casual dress after 6pm, which rules out polo shirts, shorts and denim. Cruises of four to seven nights have one formal night, and cruises of eight to eleven nights have two. If you prefer not to dress up, you can eat in the more informal Grill.
Explora Journeys
Explora, MSC Group’s luxury brand, is posh in a modern way: big suites, excellent restaurants and a calm, design-led atmosphere. There are no formal nights and no dress hire. From 6pm, guests are asked to wear “elevated resort casual”.
The most formal cruise line: why Cunard is only seventh
Cunard keeps dress codes more firmly than any other big-ship line. Every evening after 6pm is Smart Attire. On Gala Evenings, usually two or three on a two-week voyage, many guests wear dinner jackets, tuxedos, dark suits or kilts, with evening gowns or cocktail dresses. The dress code applies in the main restaurants and many public rooms, though the buffet stays relaxed. If “poshest cruise lines” to you means the most formal, Cunard is the clear winner.
So why only seventh? Cunard’s ships carry around 2,000 to 3,000 guests, most fares include very little, and a standard Britannia cabin costs mainstream prices. The poshness is in the ritual, not in exclusivity. That changes if you book the Grills. Princess Grill and Queens Grill suites have their own restaurants, lounges and deck space, and Queens Grill would reach our top five on its own. Our guide to Cunard Queens Grill vs Princess Grill explains what the extra money buys.
Viking, Oceania and Fred. Olsen
Viking is adults only and has no formal nights. Fares include wine and beer with meals, Wi-Fi and a shore excursion in most ports. Oceania is best known for its food. The dress code is smart but has no formal nights, so it suits people who want good restaurants without a dinner jacket. Fred. Olsen has small, traditional ships with a loyal British following. Most evenings are smart casual and formal nights are optional.
Mid-market lines that still dress up
The lines ranked 10 to 13 are mainstream on price and space, but they still offer chances to dress up:
- Celebrity: Smart Casual most evenings, with one or two “Evening Chic” nights per cruise. Its suite area, The Retreat, has a private restaurant and lounge.
- P&O Cruises: most evenings are Evening Casual, but P&O still holds Black Tie nights. Dark suits, dinner jackets and cocktail dresses are the norm on those nights. The number varies with cruise length.
- Princess: roughly one formal night a week, with smart casual the rest of the time. See our P&O Cruises vs Princess Cruises comparison if you’re choosing between the two.
- Holland America: smart casual most nights, plus a couple of “Dressy Nights”. On longer Grand Voyages, more formal wear is suggested.
The least posh cruise lines (and why that’s not a bad thing)
A low rank here isn’t criticism: these lines aim to be relaxed and good value.
- Virgin Voyages is adults only and includes tips, Wi-Fi and all its restaurants. Its motto is “Dress up. Dress down. Just dress.” Scarlet Night is the only themed dress-up evening, and guests are asked to wear red.
- Marella has replaced formal night with a more relaxed “Dress to Impress” night, and how dressy you go is up to you. Drinks and tips are included on many fares.
- MSC holds up to two gala nights a week, but the main ship is busy and casual. The MSC Yacht Club suite area, with its own restaurant, pool and butlers, is far posher than the rest of the ship.
- Norwegian (NCL) is built around “Freestyle” cruising with no set dining times. In early 2026 it tightened the rules in its speciality restaurants (Cagney’s, Le Bistro, Onda by Scarpetta, Palomar and the Haven Restaurant). Shorts and flip-flops are no longer allowed at dinner there, and tank tops, caps and ripped jeans are banned across its main and speciality dining rooms. NCL’s suite area, The Haven, is its upmarket option.
- Royal Caribbean, Carnival and Costa are giant resort ships with water slides, shows and families. Most still have a dress-up night (formal or “Wear Your Best” on Royal Caribbean, Elegant Night on Carnival), but the overall feel is holiday casual.
How to get a posh cruise without paying ultra-luxury fares
On mainstream ships, poshness depends on where you sleep, not just which line you book. Several lines now run a “ship within a ship”, a private area for suite guests:
- Cunard Queens Grill and Princess Grill: the classic option, with private dining and lounges.
- MSC Yacht Club: butlers, a private pool and its own restaurant.
- Celebrity The Retreat: a private restaurant, lounge and sundeck.
- NCL The Haven: private courtyard, pool and restaurant on many ships.
These can work out cheaper than an entry-level suite on Silversea or Regent, especially once you add up what each fare includes. Compare the total cost, including drinks, tips and Wi-Fi, rather than just the headline fare. Also check how many formal nights your exact voyage has, because on Silversea, Regent and Saga that depends on cruise length. If you’re still deciding on the type of line, our beginner’s guide to picking a cruise line is a good place to start.
For outfit ideas and dress codes by line, see our guide to what to wear on a cruise.
FAQs
Which is the poshest cruise line?
On our scoring, Silversea is the poshest cruise line, just ahead of Regent Seven Seas and Seabourn. All three have small ships with only suites, very high staff numbers and fares that include almost everything. Saga is the poshest British line.
What is the most formal cruise line?
Cunard. Every evening is Smart Attire and Gala Evenings are black tie, with many guests in dinner jackets and gowns. Saga, P&O Cruises (Black Tie nights) and Fred. Olsen also still hold formal evenings.
What are the top 5 luxury cruise lines?
For poshness, our top five are Silversea, Regent Seven Seas, Seabourn, Saga and Explora Journeys. Newer superyacht brands such as Four Seasons Yachts (95 suites, launched March 2026) and the Ritz-Carlton Yacht Collection also compete at the very top end.
Do luxury cruise lines still have formal nights?
Fewer do. Regent and Silversea now hold “Formal Optional” nights, and only on longer voyages. Explora, Viking and Oceania have no formal nights. Cunard, Saga and P&O are among the lines that still dress up.
