JetBlue flies its A321neo and A321LR variants across the Atlantic, the latter is a lower-ranged predecessor to Iberia's A321XLR and is more premium-heavy. They host 160 and 114 seats, respectively.

Each is equipped with lie-flat Mint seats, front-row Studios, and extra-legroom economy seats — the remaining are regular coach seats. Half of the A321LR cabin is premium seating.

Iberia has a higher-capacity A321XLR with 182 seats: 14 in business class and 168 in economy.

JetBlue and Iberia chose the same seatmaker for their A321neo business class cabins, but Iberia did not install a sliding door. Mint has doors.

This goes against an industry-wide trend, with many global carriers, such as Korean Air, Air India, and Turkish Airlines, adding the popular feature.

Business Insider toured Iberia's A321XLR business class in November and found the angled seats and large wings offered more than enough privacy. Iberia likely wanted to save on costly weight and best optimize the cabin's already limited space.

To cater to more business travelers, JetBlue installed a front-row "Mint Studio" on its A321neos, complete with a companion seat and extra storage. The seat is an upcharge.

Iberia did not include the extra-revenue option, meaning travelers have less choice in business class.

Because the seats are otherwise exactly the same design, travelers can expect similar comforts. This includes a lie-flat recliner, storage, and an inflight television. Both also include meals, linens, and an amenity kit.

Iberia's 18.5-inch screen is bigger than JetBlue's 17-inch one in regular Mint, though the Mint Studio hosts the largest overall at 22 inches.

However, JetBlue does not offer Bluetooth connectivity. Customers on Iberia can connect their own wireless headphones to the business-class screens — and that goes for the economy cabin, too.

The 3×3 economy cabins offer adjustable headrests, an inflight screen, extra storage slots in the seatback pocket, and linens.

JetBlue's 10.1-inch screen is smaller than Iberia's 12-inch Bluetooth one, but JetBlue travelers can connect their phone as a remote. JetBlue also offers free WiFi, while Iberia's is only free for messaging.

Iberia's seats recline up to four inches, while JetBlue's recline three inches. Thanks to Airbus' wider narrowbody cabin design, both coach options offer 18 inches of width.

JetBlue has several rows of "Even More Space" seats to target flyers willing to pay extra for more legroom. The US carrier also offers an industry-leading 32 inches of legroom — beating out rivals like Delta and United.

Iberia's 40-inch-pitch extra legroom seats are only in the bulkhead and exit rows, meaning taller travelers have limited options for more space. The legroom is 30-31 inches, putting Iberia on par with US mainlines.

Iberia does not have a window in row 39. The windows in rows 22 and 23 on JetBlue's A321LR and rows 23 and 24 on its A321neos are missing or misaligned.

If you pay extra for a window seat with hopes of a view, it's best to avoid these rows.

In October, JetBlue stopped serving hot meals in economy on transatlantic flights in an effort to cut costs. Cold meals are now served, like a crepe for breakfast, a chicken grain bowl for lunch, or a pesto pasta salad for dinner.

Still, the meals come included in the fare — something that distinguishes JetBlue from other low-cost options like Norse Atlantic Airways where food costs extra.

Iberia customers can expect hot meals in coach, which is in line with what mainline carriers offer across the Atlantic.

Coach travelers on Iberia share three lavatories in the aft cabin, but the high-capacity cabin means the queue can get long and crowded — especially if the third one is overlooked, as can be the case.

It's located behind the flight attendant jump seat.

Airbus' new long-ranged jets are changing the way people fly to Europe. Some people may worry about the smaller plane, but it has its benefits.

The tinier cabin may be cozier, plus deplaning and boarding are much quicker thanks to fewer people — and may be a saving grace during tight layovers.

La Compagnie is a small, all-business-class airline that serves Paris, Nice, and Milan from the US with A321neoLRs. It offers many cost-friendly fares, with roundtrip tickets starting at $2,500,

Iberia's new A321XLR will cost customers up to $5,000 or more roundtrip, depending on the season.

JetBlue's A321neoLR offers some discounted Mint fares to London, but other destinations are typically at least $3,000-$4,000.

La Compagnie and Iberia don't sport the sliding door that is standard at every JetBlue Mint seat. The privacy perk is increasingly popular on wide-body premium seats.

The French carrier's 2×2 layout would make one impossible to fit, while Iberia carefully designed its 1×1 cabin to be private without one. It has angled seats, high walls, and large wings.

La Compagnie has the most awkward layout of the three. The 2×2 layout optimizes the space, but it means flyers could be sleeping right next to a stranger on a full flight — and the window seat can't freely access the aisle.

There is a small divider between seats, but it doesn't do much to block travelers from one another. The airline is largely meant for families and couples, so you may not have an unknown neighbor.

Two of JetBlue's 24-person Mint business class seats are designated as the extra-large "Studio" with a companion seat to dine or meet with another traveler.

La Compagnie offers more legroom in its exit rows and bulkhead. This provides more ease for the window passenger if climbing over an aisle seatmate.

Iberia's smaller 14-person business class does not have any extra-large seats available.

Iberia's 18.5-inch television has Bluetooth built-in, allowing travelers to connect their own wireless headphones to the screen.

JetBlue provided customers on its inaugural flight from New York to Paris in June with a free AirFly Pro Bluetooth audio transmitter, but it doesn't come as the standard — future travelers need to bring their own.

La Compagnie's 15.6-inch screen also didn't have Bluetooth. All three did have a remote, with JetBlue's Studio having the largest screen at 22 inches. Its regular suites boast a 17-inch television.

La Compagnie had barely any storage space aside from the overhead bin that was big enough to fit bigger items, like a laptop or a small backpack.

Iberia's storage under the television and behind the screen provides more ample storage, as does JetBlue's design. And both have more tabletop space — something La Compagnie customers have the share.

JetBlue's "do not disturb" sign tells flight attendants not to wake up passengers, even during a meal service.

It's likely a welcome perk for overnight flights. Iberia and La Compagnie don't have the same feature.

All three airlines offer the same standard business-class perks, including an amenity kit, hot meals, a tray table, linens, WiFi, and power.

For power, the airlines each have a USB-A port and a universal outlet. JetBlue and Iberia both also offer a USB-C port, and the former includes a wireless charging pad that the other two don't.

Iberia has its own branded business-class lounges in Madrid. In the US, flyers can use Oneworld partner lounges. La Compagnie offers their travelers lounge access via partnerships.

JetBlue, however, does not have a dedicated lounge. However, JetBlue plans to build airport lounges to expand its premium offerings.

For now, flyers can access airport lounges via a credit card, like American Express or Chase.

Despite JetBlue's lack of a lounge, the cabin seat is the most amenity-heavy with its door and do-not-disturb sign. Plus, its Studio offers more choice.

Iberia is a close second with good privacy and comfort, but I'd personally prefer JetBlue when flying transatlantic for price and amenities.

La Compagnie has the most awkward design, but there isn't a logical other way to configure its planes because it needs to optimize space.

Still, the prices are among the cheapest ways to cross the Atlantic in business class. I think it's a good option for leisure travelers willing to splurge but don't want to pay for more expensive airlines.

JetBlue offers the most A321neoLR routes across the Atlantic with service to London, Amsterdam, Paris, Dublin, and Edinburgh, Scotland, from New York or Boston.

Iberia flies the A321XLR to Boston and, soon, to Washington Dulles. JetBlue plans to eventually receive the A321XLR, which could open new European routes, such as Italy and Spain.

La Compagnie indirectly competes with JetBlue in Paris. Instead of flying from New York-JFK to Charles de Gaulle like JetBlue, it flies from nearby Newark to Paris-Orly.

There are a few other narrow-body, lie-flat business classes that I haven't yet seen, like Aer Lingus 'A321neoLR. Starting in 2025, the airline will also fly bed-equipped A321XLRs on routes like Nashville to Dublin.

American and United are among the other carriers planning A321XLR flights with beds in business class — with United replacing its lie-flat Boeing 757s with the A321XLR in 2026 and adding new routes.