You may know the Airbus A340 as a single-deck aircraft, meaning it has only one main deck where passenger cabins are located. This is unlike the Airbus A380 and Boeing 747, which have two distinct decks (or levels) where passengers can sit.

However, Lufthansa is an oddity in the case of the A340. While it does not have two decks of seats, it does have a set of lower-deck bathrooms across its A340-600 fleet. Why is this the case?

Lufthansa's A340-600

Lufthansa currently has ten active Airbus A340-600s. The carrier initially had 24 examples in its fleet, but 14 were removed from service due to the pandemic. Lufthansa plans to operate the current ten aircraft until 2028, when the A350-1000 will replace them.

The slight reactivation of Lufthansa’s A340-600 fleet was prompted by the strong resurgence in international travel demand in 2022 as the world reopened following the pandemic.

Today, four-engined aircraft like the A340s have been gradually disappearing from the skies worldwide.

Airlines like Virgin Atlantic, Qatar Airways, and Air France got rid of their A340 fleets immediately after the pandemic. Such aircraft are true gas guzzlers and far less efficient than the newer twin jets like the Boeing 777, 787, and Airbus A350.

Lufthansa’s A340-600 seats 281 passengers, eight in First Class, 56 in Business, 28 in Premium Economy, and 189 in Economy Class.

While mainly based in Munich (MUC) at one point, Lufthansa has primarily transitioned its A340-600 fleet to Frankfurt (FRA).

The aircraft operate long-haul flights all across the world with destinations including Chicago (ORD), New York (JFK), Boston (BOS), Denver (DEN), Seattle (SEA), Riyadh (RUH), Dammam (DMM), Delhi (DEL), and Hong Kong (HKG).

Lower Deck Bathrooms

The Lufthansa A340-600s have become notable for one specific quirk: their lower deck lavatories. A staircase leading to these lower deck bathrooms is in row 40, just before the R4 exit door. The stairs replace seats 38, 39, and 40E and G.

You must open a small gate before proceeding down the staircase. This is a precautionary measure to prevent anyone from accidentally tripping and falling down.

Once on the lower deck, you will find five lavatories. There is nothing special about them besides that you’re on the same level as the cargo hold.

While this is a super cool feature, there is something to remember.

These five lavatories are the only bathrooms on Lufthansa’s A340-600s serving the Premium Economy and Economy cabins. This begs the question of what would happen to passengers with limited mobility who need to access the bathrooms.

Overall, the lower deck lavatories on Lufthansa’s A340-600s are unique. This is the only single-deck aircraft in service with anything like them. If anyone is keen on experiencing this for themselves, they have until 2028.