Overnight trains are accommodation, and should be priced that way

Comparisons of sleeper trains usually pick a winner. This one picks the circumstances, which is more useful.

The right comparison

A sleeper fare looks expensive against a day train seat and cheap against a seat plus a city-centre hotel. It also removes a transfer to and from an airport at both ends, which is time as well as money. Counted properly, an overnight train frequently costs less door to door than the equivalent flight and hotel.

The comparison people actually make — headline fare against headline fare — is the one that makes sleepers look uncompetitive.

Berth types are not interchangeable

A seat in a night train is cheap and, on anything over eight hours, close to useless for arriving functional. A six-berth couchette is a compromise: horizontal, shared, and unpredictable depending on who else is in it.

A two-berth or single sleeper is the version that reliably delivers a night of sleep, and is priced accordingly. Single-gender compartments are bookable on many networks and are normally a selectable option rather than a paid upgrade, which is worth finding before you commit to a shared berth.

Booking is unlike day trains

Sleeper inventory often opens later than day services and is released in tranches rather than all at once. The cheapest berths go first and early, and prices climb steeply as departure approaches.

On jointly operated routes, the same berth can appear at different prices on different national railway sites. Some operators sell by the compartment rather than by the berth, so a solo traveller is quoted the whole space unless the same train is also offered as a shared booking.

Arrival time is the hidden variable

A service arriving at 05:20 hands you a city with nothing open and a hotel that will not check you in for eight hours. One arriving at 08:30 delivers you into a working day, which is the entire proposition. The better-run routes deliberately slow the final section to land at a civilised hour, and it is worth choosing on this.

Where a dawn arrival is unavoidable, booking the previous night at the destination is the reliable fix, and it usually costs less than the alternatives you will resort to by mid-morning.

What to actually bring

Earplugs and an eye mask are not refinements on a night train; they are the difference between sleeping and not. Water, because heating is aggressive and buffet cars close, and a small bag with what you need overnight so the main bag can go in the rack.

Layers, because compartment temperature is controlled centrally and is either too hot or not at all. Nothing worth stealing should spend the night in the rack by the door, and a short cable lock through the bag handle covers the compartments that do not lock from inside.

Where sleepers still fail

Rolling stock on many routes is decades old, and air conditioning failures in summer are a genuine and recurring problem. Cross-border services are vulnerable to engineering work and industrial action on any of the networks involved. Build slack after an overnight arrival rather than scheduling anything important for that morning.

On a long trip, compensation rules for delay and cancellation differ between rail and air and between countries, and on a service run jointly by two operators it is not always obvious which of them owes you anything.

Side by side

The takeaway

Price it against a flight plus a hotel plus two airport transfers. That is the actual alternative.

Pack for the trip you are actually taking, not the one in the photographs.