The short answer

For backpackers plotting a Western, Central or Northern Europe route, the train often wins for trips under about 600 km and where the cities sit on a fast rail corridor. The budget flight often wins for long point-to-point hops — say Berlin to Seville or London to Athens — where rail means a full day on a train and a likely change of station. The middle ground, roughly 500–900 km between secondary cities, is where the decision gets interesting, and it is the ground this guide focuses on.

If you only have time to think about two things, make them: how far apart your next two cities actually are, and how much luggage you’re carrying. Everything else — price, time, comfort — flows from those two numbers.

How to think about distance on a Europe backpacking route

Intercity rail networks in Europe cover the 100–1,000 km band, and high-speed rail on dedicated lines is the fastest-growing slice of that band. Trains at 250–300 km/h compress what used to be a full-day journey into a half-day hop, and they drop you in the city centre rather than at an out-of-town airport.

For a backpacker, the practical breakpoints look roughly like this:

  • Under 300 km, both cities well-served by rail. Trains almost always beat flights door-to-door. Paris to Brussels, Berlin to Prague, Vienna to Budapest, Copenhagen to Malmö — the airport, the transfers and the security queues eat the time advantage of flying.
  • 300–600 km between major hubs on a high-speed corridor. Rail usually wins on total journey time once you include airport access and waiting. Examples: Paris to Amsterdam, Frankfurt to Munich, Madrid to Barcelona, Milan to Rome.
  • 600–900 km, especially if one city is secondary. This is the swing zone. A direct budget flight can undercut a multi-leg train ride on both time and money, especially if the train route requires a change at a junction like Paris or Frankfurt.
  • Over 1,000 km, or routes crossing seas or mountain blocks. Flights tend to dominate — London to Athens, Dublin to Berlin, Lisbon to Copenhagen. Night trains are a real alternative on a few of these corridors and worth checking as a sleeper-and-savings option.

The reason this matters: most backpackers string together a chain of 200–500 km hops, not a single 1,500 km jump. A route that looks “short” on a map is often the one where the train quietly wins.

City-pair availability: who actually runs the trains and the planes

Not every pair of cities has a direct budget flight. Not every pair has a direct high-speed train. Before you commit to a mode, check that the specific link exists.

Where budget flights are dense: Major hubs with multiple low-cost carriers — London, Berlin, Vienna, Milan, Barcelona, Madrid, Amsterdam, Prague, Budapest, Warsaw. If both your cities are on that list, you can usually find a cheap point-to-point fare.

Where budget flights thin out: Smaller cities, secondary airports, and any pair where one side is dominated by a flag carrier. The same route may be available only via a low-cost connection through a hub, at which point the train starts looking attractive again.

Where direct trains are dense: The Western European high-speed network — France, Belgium, Netherlands, western Germany, northern Italy, eastern Spain — has the densest direct intercity and high-speed coverage. The ÖBB Railjet network pulls Austria, the Czech Republic, Slovakia, Hungary and parts of northern Italy into one timetable.

Where trains get patchy: Cross-border pairs that fall between two national networks, routes through mountainous terrain, and anything involving the Baltic states or the Nordic north beyond the main corridors. Some of these pairs are exactly where you may need to mix modes — train to a hub, then a flight out.

A useful pre-booking check: open a rail comparison site and a flight comparison site side by side. If the train option forces you to change twice and depart at 6 a.m., the flight is probably going to feel like the better choice, even at a higher price.

Airport transit cost: the hidden line item

This is the line item backpackers most often forget. A €25 flight is not a €25 journey once you add the airport.

  • Train stations sit inside the city, often next to the metro, and you arrive on foot or by a short transit ride you’ve already planned for.
  • Airports in Europe are commonly 30–60 minutes from the centre by express train, regional rail, or bus. Add the ticket cost (often €8–€20 return) to the airport transfers for two people if you’re travelling with a partner, or to the cost of a luggage-stuffed local bus if you’re solo.
  • Time cost matters as much as money. The standard two-hour airport rule of thumb — arrive two hours early, allow an hour each side for transit — can swallow a four-hour budget flight’s time advantage on short routes.

When you compare a €40 flight against a €70 train, the airport transit on both ends can close the gap to almost nothing on a short hop. On a long hop, the same transit is a rounding error against a 2.5-hour flight.

Low-cost airline baggage rules in Europe: read the small print

This is where many backpackers get caught. A fare that looks cheap can balloon once you add a checked bag.

Typical patterns to expect — but always check your specific carrier and fare class on the booking page, because rules vary by platform and route:

  • A small cabin bag is usually included on most European low-cost carriers, but the size limits are tighter than you may remember from full-service airlines. A “free” cabin bag that doesn’t fit the sizer at the gate is a paid gate-checked bag at a premium price.
  • A carry-on trolley plus a small personal item is the next tier up, and the price gap between that and a checked bag is often narrower than the gap between no-bag and carry-on.
  • A checked backpack is the realistic option for anyone carrying 40+ litres, and the fees vary sharply by route and season. Some carriers bundle a checked bag into the headline fare on busy routes; others charge per bag per leg.
  • Sports gear, musical instruments and oversize items are usually a separate fee category. If you’re carrying a tent, trekking poles or a camera tripod, assume the budget airline will want to talk about it.

The implication for backpackers: a 45-litre pack plus a daypack is at the edge of what a budget airline will accept for the base fare. Either budget for an extra bag fee or carry enough layers in your daypack to make the main bag fit the carry-on dimensions.

By contrast, a train ticket generally lets you carry what you can lift. There is no bag-fee tier on most European intercity and high-speed services, and overnight trains usually have luggage racks that fit a full-size backpack.

Booking lead time: when to lock each mode in

Train and flight booking curves behave differently, and that creates arbitrage opportunities.

  • Budget flights tend to be cheapest 6–10 weeks out for European routes, with prices climbing in the last two weeks. The cheapest fares also tend to cluster around unpopular midweek and shoulder-season days. Skyscanner and similar comparison tools are commonly used to scan a whole month at once and spot the cheap day.
  • Advance-purchase train tickets in Western Europe work similarly — discounted fares appear once the timetable opens, usually 3–4 months ahead, and sell out on busy corridors. If you know your route in February for a July trip, the early-bird fare can be a third of the walk-up price.
  • Full-flex train tickets are available closer to departure at a higher price. They’re useful if your route is weather-dependent, politically uncertain, or genuinely open-ended — the kind of trip many backpackers are running.
  • Night trains and sleeper services have their own inventory curve and can fill up weeks ahead in summer. These often beat a budget flight once you price in the saved hostel night.

A practical habit: set a calendar reminder for 8 weeks before each leg and recheck both modes. A fare that was cheaper by train yesterday may flip to flight tomorrow, or vice versa.

How to actually run the comparison for one leg

A simple step-by-step you can use for each city pair on your itinerary:

  1. Measure the straight-line distance and decide which band it falls into (under 300, 300–600, 600–900, over 1,000 km).
  2. Check Skyscanner (or a comparable comparator) for the cheapest flight that day, including airport transfer cost from each city centre.
  3. Check a rail comparison site for the same date, looking for direct trains first and accepting one change only if the total time still beats the flight.
  4. Add the baggage reality: if your pack will trigger a checked-bag fee, add that to the flight price.
  5. Add the time reality: airport transit plus airport time versus station-to-station train time.
  6. Pick the lower of the two totals — money if you’re on a tight budget, time if you’ve planned a short stay.

For most backpackers, this exercise flips about one in three legs from “obviously a flight” to “actually a train” once airport time and bag fees are counted.

When the train wins — and when it doesn’t

The train tends to win when: both cities are on the same high-speed or intercity corridor; the route is under about 600 km; you’re carrying a full backpack; you want to arrive in the centre and start exploring; or you value being able to walk around, look out the window, and use the onboard time productively.

The flight tends to win when: the cities are far apart or split by sea or mountains; one or both cities lack direct rail; the airport-to-airport fare is dramatically cheaper than the train even after transfers and a bag; or you need to cover ground fast because your trip is short.

The sleeper train is its own category. On a few corridors, an overnight train replaces both a daytime journey and a hostel night, which can be the cheapest option per kilometre on the whole trip. The European night-train network has expanded in recent years, with services like ÖBB Nightjet reviving routes that disappeared in the 2010s.

A note on rail passes and point-to-point tickets

Rail passes can simplify a multi-city trip, but they’re not automatically cheaper than point-to-point tickets bought in advance. The honest comparison is: total pass price versus the sum of advance fares for the legs you’ll actually take. On a route that sticks to high-speed corridors and you book early, point-to-point usually wins. On a flexible, last-minute, off-corridor route, a pass can pay for itself. Run the math for your specific itinerary rather than assuming.

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