No dress code except for staff flying on non-rev tickets. In my experience most other passengers will be dressed casually as comfort during the flight is a high priority.

British Airways does not enforce a formal "Black Tie" or "Business Suit" dress code for its Club World (Business Class) or First Class cabins, but there is an unwritten expectation of "Smart Casual" attire. Passengers are encouraged to wear clothing that is comfortable for long-haul travel but still looks presentable. Generally, this means avoiding torn clothing, offensive slogans, or extremely revealing beachwear. While you will see many travelers in jeans and high-end knitwear, some "old-school" frequent flyers still opt for blazers. In 2026, BA has also updated its staff uniforms to be more modern and inclusive, reflecting a shift toward contemporary style. For passengers, the priority is comfort, especially since you will likely be changing into the provided pajamas for the lie-flat bed experience. As long as you look reasonably tidy, you will be welcomed into the Galleries Lounges and onto the aircraft without issue.

Yes, British Airways does have a dress code for its business class (Club World) passengers, but it is smart-casual and generally not overly strict or formal.

The key principle is to dress in a way that is respectful to the crew and fellow passengers. The airline wants to maintain a certain standard of comfort and decorum in the premium cabins.

Here’s a breakdown of what this typically means:

Recommended / Acceptable Attire (Smart-Casual):

• For Men: Smart trousers or chinos, a collared shirt (polo or dress shirt), and a sweater or smart jacket. Clean, presentable jeans are usually acceptable.
• For Women: Smart trousers, a skirt, a dress, or good-quality jeans paired with a blouse, top, or sweater.

What to Avoid:

British Airways explicitly states that clothing should not be offensive or cause discomfort to other passengers. The following items are generally considered inappropriate: Clothing with offensive slogans or images. Excessively torn or dirty clothing. Beachwear (e.g., swimwear, bikini tops, bare feet). Sleepwear or loungewear that looks like pajamas (though comfortable “plane clothes” are fine). Very revealing clothing. Bare feet in the cabin (slippers are provided).

Important Nuances:

1. The “Spirit” vs. The “Letter”: The rule is more about the overall impression than specific items. A clean, dark pair of jeans with a nice blazer and shoes will almost never be questioned, while ripped, stained sweatpants might be, even though neither is explicitly banned.
2. Ground Experience: You are more likely to be “noticed” for dress code at the airport lounges (especially the prestigious Concorde Room in London) than on the plane itself. The lounges tend to uphold the standard a bit more.
3. Flight Route: Expectations can be slightly higher on key business routes (e.g., London to New York) compared to a holiday destination.
4. Cabin Crew Discretion: Ultimately, the cabin crew has the discretion to ask a passenger to change if they deem their attire inappropriate, though this is very rare in business class.

In Practice:

Most business class travelers naturally dress in a smart, comfortable, and understated way for a long flight. Think of what you might wear to a nice hotel lounge or a casual business meeting—that’s the perfect guideline.

Bottom Line: You don’t need a suit or formal dress, but you should avoid looking like you just came from the gym or the beach. When in doubt, err on the side of being slightly smarter. The goal is to be comfortable while fitting in with the refined atmosphere of the cabin.