Train travel: a low-carbon way to see the world

Switching even one flight a year for a train journey is one of the most meaningful individual steps you can take to lower your travel footprint — and rail travel often turns out to be a more relaxed, more human way to move through the world.

Why rail is lower-carbon

Compared with flying or driving alone, rail travel almost always produces considerably less carbon dioxide per passenger kilometre. The reasons come down to physics and load factors: a train moves many people at once using a shared energy source — usually electricity — and runs on steel rails that create very little rolling resistance.

Flying produces high emissions not just from the fuel burned but also because aircraft emit gases and particles at high altitude, where they have a greater warming effect than the CO2 figure alone suggests. Solo car travel concentrates those emissions on one person. A reasonably full train, particularly one running on electricity from a low-carbon grid, divides its energy use across a large number of passengers.

The exact comparison varies: a diesel train on a route with low passenger numbers won't look as good as a high-speed electric service at full capacity. But as a broad pattern, choosing rail over flying for distances up to around 1,000 km — and often considerably further — is one of the clearest ways to lower the carbon cost of getting somewhere. For the wider picture on making travel more sustainable, our travel guide covers all the modes.

• Electric trains on renewable grids produce very low emissions per passenger kilometre.
• High-speed rail (Eurostar, TGV, Shinkansen, ICE, AVE and their equivalents) is particularly competitive with flying on city-pairs it directly serves.
• Conventional rail is still substantially better than aviation on most routes, even on dirtier electricity grids.
• Diesel trains on lightly used regional lines are the least favourable comparison, but still often better than a single-occupancy car for the same distance.

When the train makes the most sense

Rail is most competitive — on time, cost and comfort — in specific situations. Knowing these helps you choose it when it genuinely works.

• City-centre to city-centre travel. Train stations are almost always in the heart of the city. Airports are not. On shorter routes, a two-hour train journey city-to-city often beats a one-hour flight when you add check-in, security, airport transfers and baggage wait at both ends.
• Well-served high-speed corridors. London–Paris, Paris–Amsterdam, Paris–Lyon, Madrid–Barcelona, Tokyo–Osaka, Beijing–Shanghai and equivalents around the world are often faster door-to-door by rail and significantly cheaper if booked ahead.
• Scenic journeys where the trip is the point. The Bernina Express through the Swiss Alps, the Glacier Express, Norway's Bergen Line, the Ghan across the Australian outback, the Trans-Siberian Railway — some journeys are experiences in themselves, not just a means of getting somewhere.
• Trips with luggage or young children. No weight restrictions, no overhead-bin scrambles, space to move around, often a dining car. Rail is simply more civilised with a lot of bags or a pushchair.
• Business travel or working trips. You can open a laptop, take calls, eat a real meal and arrive without the depleted feeling that comes from a flight and a shuttle bus.

How to plan and book well

Getting the best experience and the best price from rail travel takes a little more planning than tapping a flight app, but it's genuinely rewarding once you know the system.

• Book early. The booking window for many European trains opens 2–3 months ahead; UK trains typically 12 weeks. The cheapest advance fares sell out fast on popular services. Set a reminder for when booking opens.
• Use the operator's own website first. National rail operators (SNCF in France, Deutsche Bahn in Germany, Trenitalia in Italy, NS in the Netherlands, and so on) often have the lowest fares on their own platforms. Aggregators like Trainline or Omio are useful for cross-border journeys but add a booking fee.
• Split-ticketing. In the UK particularly, buying two or more tickets covering different sections of a journey — rather than a single through-ticket — can be substantially cheaper. Apps like SplitMyFare or Trainsplit check this automatically. The train doesn't stop; you simply hold two tickets.
• Rail passes. Interrail (for European residents) and Eurail (for non-Europeans) passes allow unlimited or counted travel across most of Europe's rail network. They're most worthwhile for flexible, multi-country itineraries — if your route is fixed and you can book ahead, point-to-point tickets are usually cheaper.
• Journey planning tools. For complex overland routes, Seat61.com is an invaluable free resource with practical booking advice for trains worldwide. DB's journey planner (bahn.de) is surprisingly good for European routes even outside Germany. Rome2rio gives a quick cross-modal overview.
• International overland routes. London to Edinburgh or Glasgow. Brussels to Cologne to Berlin. Paris to Vienna overnight. Amsterdam to Copenhagen. These corridors are well served, competitively priced if booked ahead, and avoid flying entirely.

Overnight sleeper trains

Night trains are one of rail's most underrated options. You board in the evening, sleep on board, and arrive at your destination in the morning — saving a night's accommodation and avoiding a flight. They suit journeys of roughly 6–14 hours particularly well.

European sleeper services have expanded in recent years. ÖBB Nightjet connects Vienna, Innsbruck and Salzburg with Amsterdam, Brussels, Paris, Rome, Hamburg, Berlin, Zurich and other cities. The Caledonian Sleeper links London with Scottish Highlands stations. Trenhotel connects Madrid and Lisbon. New routes have been added across the continent as demand for lower-carbon overnight travel grows.

• Accommodation options range from a seat reservation (cheapest, not ideal for sleeping) to a couchette berth in a shared compartment (good for budget travel and often perfectly comfortable) to a private cabin with a lockable door (more expensive but genuinely private and often includes breakfast).
• Book well ahead. Couchette berths and cabins on popular routes, especially in summer, sell out months in advance. Booking at the 3-month mark is a reasonable rule of thumb.
• Value calculation. If you subtract the cost of a hotel room you'd have needed anyway, a sleeper berth often works out cheaper than flying and staying overnight, while also avoiding the airport stress on both ends.
• Practical tips: bring a sleep mask and earplugs, board before the train fills, and check whether bedding is included or costs extra.

Making the journey enjoyable

A long train journey is not just a means to an end — with a little preparation, it can be one of the more pleasant parts of a trip.

• Pack light if you can. There are no luggage weight restrictions on most trains (unlike flights), but large bags are awkward in overhead racks. A bag you can lift easily and keep with you makes everything simpler.
• Bring your own food and drink. Train dining cars and buffets are convenient but expensive. Preparing your own food is cheaper, involves less packaging, and you control what you eat. Bringing a reusable bottle and container avoids single-use plastic at buffet cars.
• Download, don't stream. Mobile signal is patchy in tunnels and rural areas. Download podcasts, music, films and reading material before you board.
• Make the most of the view. Sit on the side of the carriage that faces the landscape if you know the route. The window is genuinely part of the experience on scenic routes — put the laptop away for stretches of it.
• Work comfortably. Many trains have power sockets at seats and increasingly offer Wi-Fi. A window seat with a tray table is often a better working environment than an office.
• Stretch and move. Unlike a plane, you can walk down to the dining car, stand in a vestibule, and move around freely. Build a short walk into each hour if you're on a very long journey.

Getting around at the destination

Arriving by train means arriving in the city centre, which puts you within reach of good public transport and cycling options from the start. You don't need a hire car to navigate from an out-of-town airport — you're already where you need to be.

From the station, using local public transport — metro, tram, bus — is almost always the cheapest and lowest-impact way to get around. Many cities sell multi-day visitor travel cards that cover unlimited trips on buses, metro and trams for a flat daily rate. In cities with good cycling infrastructure, a day hire bike or an e-bike is an excellent way to cover ground flexibly and see areas you'd miss on the metro.

• Check whether your destination city has a travel card for visitors before you arrive.
• Download the local transport app; many cities have real-time journey planning built in.
• Many train stations have bike hire at or near the exit — look for Vélib' in Paris, Bicing in Barcelona, Santander Cycles in London and equivalents.
• Luggage storage at large stations (often €5–10 per item per day) means you can explore on arrival even if your room isn't ready.

Honest limits: cost, time and coverage

Rail travel is not always the obvious choice, and it's worth being honest about the constraints.

• Cost. Last-minute train tickets — particularly in the UK — can be startlingly expensive. Rail is competitive when booked ahead; it is often not competitive as a walk-up fare. Budget airlines, for all their other drawbacks, are sometimes cheaper on short notice. The solution is to plan rail trips further ahead.
• Time. For very long distances — London to Tokyo, New York to Los Angeles, Sydney to Perth — overland rail is not a realistic replacement for flying unless you're specifically choosing the journey as an experience. Rail wins on time up to roughly 4–5 hours of travel; beyond that it depends heavily on the individual route.
• Coverage varies hugely by country. Western Europe, Japan, Taiwan, China and parts of the eastern US have dense, fast rail networks. Much of North America, Australia, South-East Asia and sub-Saharan Africa have limited or slow inter-city rail, making alternatives more necessary. Work with the network you have.
• Accessibility. Rail is generally better than aviation for accessibility — no security theatrics, step-free access on many modern trains, more space for wheelchairs — but older trains and smaller stations can have significant gaps. Always check accessibility information for your specific route and book assistance in advance if needed.
• Travelling with families. Trains are well suited to families: space to move, no seat-belt sign, no restriction on liquids for babies, often a family carriage with tables. Reservation is advisable in busy periods to guarantee seats together.

Your train-travel checklist

• Identify the booking window for your route and set a reminder to book when it opens.
• Check split-ticketing options on UK journeys before buying a single through-ticket.
• For multi-country European travel, compare a rail pass against point-to-point fares for your itinerary.
• For overnight routes, check ÖBB Nightjet, Caledonian Sleeper, or Seat61.com for options.
• Download content before boarding; pack reusables and your own food for long trips.
• Research local transit cards or bike hire at your destination before you arrive.
• Book seat reservations or berths together if travelling as a group or family.