Short flights are often sold as the ultimate convenience. They promise speed, low fares, and easy access to nearby cities or regional destinations. But they also come with a hidden environmental cost that is often far higher than travelers realize. Aviation is one of the most emissions-intensive forms of transportation, and short-haul flights are especially inefficient because the most fuel-intensive phases of flying—takeoff and ascent—make up a larger share of the journey. Studies and climate briefings have identified short domestic and regional flights as some of the easiest aviation emissions to replace with greener land-based alternatives.
Replacing short flights does not mean giving up travel. It means rethinking how to cover relatively short and medium distances in a way that creates fewer emissions and often less stress. In many cases, trains, buses, ferries, and smarter combinations of local transport can do the job almost as well, and sometimes better, once total journey time is considered. Research from Finland found that for trips up to about 400 kilometers, trains, cars, and buses can match the full door-to-door duration of flights when real travel time is measured from origin to destination rather than airport to airport.
Why short flights are a problem
Not all flights have the same climate impact. Short-haul flights are particularly problematic because they burn a large amount of fuel during takeoff and climb, yet cover relatively little distance. Research summarized in transport studies notes that domestic and very short flights are among the least efficient forms of travel and are often the easiest to substitute with train, bus, or car travel.
European reporting and policy campaigns have also emphasized how replaceable many of these routes already are. Greenpeace’s rail briefing found that one third of the busiest short-haul flights in Europe have train alternatives under six hours. Related coverage of the same analysis reported that 34 percent of the 150 busiest short-haul European flights could be replaced by train routes taking less than six hours, including routes such as Madrid to Barcelona, Frankfurt to Berlin, and Brussels to Amsterdam.
This matters because short flights remain common not only for tourism but also for business travel and flight connections. They persist partly because air travel is often priced and marketed more aggressively than rail, not because it is always the best transport choice. Greenpeace UK later reported that low-cost short-haul flights are still cheaper than equivalent train journeys on many cross-border European routes, showing that market pricing still often favors pollution over cleaner options.
Start with the right routes
The easiest way to replace short flights is to begin with the routes where alternatives are already strong. Climate Action Accelerator recommends replacing short-haul journeys with train travel wherever possible and notes a best-practice approach of shifting all flights and connecting flights shorter than 300 kilometers to rail, with partial shifts possible up to 1,000 kilometers depending on geography and rail availability.
Research from Finland offers a practical benchmark from another angle: existing ground transport can match the full travel time of flights for trips up to about 400 kilometers. In real life, that means many regional routes are already within the range where flying offers little advantage once you count airport transfers, security checks, waiting time, boarding, and the trip from the airport into the city.
A useful rule is to question any flight that connects places with a reasonable train option, a direct coach link, or a drive of only a few hours. The less distance the plane actually covers, the more likely it is that a greener alternative can compete on total effort, not just raw speed.
Choose rail first
Trains are the strongest replacement for short flights in most regions with decent rail infrastructure. Climate Action Accelerator states that train journeys are significantly less carbon intensive than flights, producing between seven and more than 40 times fewer emissions than airplanes depending on the route and system. The same source also notes that for many short- to medium-haul trips, trains can be cost-effective and even faster when airport procedures and city-center access are included.
That advantage becomes clear on routes between major cities. Greenpeace’s analysis found a large group of high-traffic European air routes that could already be replaced by train in under six hours. The practical appeal is simple: rail stations are usually more central than airports, boarding is less stressful, luggage rules are often more flexible, and the trip itself is more comfortable for many travelers.
Rail also works well for replacing short connecting flights. Climate Action Accelerator explicitly recommends replacing connecting flights shorter than 300 kilometers with train travel where network conditions allow. This is an important point because many emissions-heavy short flights exist mainly to feed long-haul hubs. If airlines and rail providers coordinated schedules and ticketing more effectively, more travelers could take a train to the hub instead of a feeder flight.
Use coaches and buses when trains are weak
Not every region has strong rail service, and that is where coaches and long-distance buses become important. The Finland study specifically examined replacing domestic flights with currently available trains, cars, and buses, showing that land-based options do not have to be high-speed rail to reduce emissions meaningfully. Buses are not always glamorous, but they are widely available, relatively affordable, and often the most realistic replacement when rail is sparse.
For travelers, the value of bus travel lies in coverage. Coaches can connect smaller cities, airports, border towns, and rural destinations that trains either skip or serve poorly. In some cases, a bus can replace a short flight directly; in others, it works best as part of a combined route, such as train plus coach or ferry plus bus. The greener choice is not always a perfect train. Sometimes it is simply whichever land-based option avoids an unnecessary flight.
Don’t forget ferries and mixed routes
Flights over water are often assumed to be unavoidable, but ferries can replace many short air routes, especially between islands and coastal regions. While the sources here focus most heavily on rail, the general principle behind replacing short flights with surface transport extends naturally to ferries wherever maritime infrastructure already exists. Greenpeace’s argument is not just “take trains,” but more broadly “shift to greener, climate-friendly alternatives where they already exist.”
Mixed routes are often the most practical answer. A traveler might take a train to a port, board a ferry, and then continue by local transit. Another might replace a flight with rail for the outbound leg and a bus for the final transfer. Sustainable replacement is not always about one clean swap. It is often about building a chain of lower-impact modes that together do the job of a single short flight.
Rethink the time equation
One reason people default to flying is the belief that air travel is always faster. For short routes, that assumption often breaks down. The Finland research found that trains, buses, and cars can match air travel times for journeys up to 400 kilometers when measured from origin to destination. Climate Action Accelerator similarly argues that trains can be faster for many short- and medium-haul journeys once airport procedures and access to city centers are included.
This changes how travelers should compare options. The right metric is not flight time in the air. It is total trip time from the moment you leave home to the moment you reach your final destination. A 70-minute flight can easily turn into a 5-hour journey once airport arrival, boarding, delays, baggage, and transfers are included. By contrast, a train may take four hours on paper but get you straight into the city center with much less friction.
Comfort matters too. Even when a train or coach takes a little longer, it may still be the better option because it allows work, rest, movement, scenery, and simpler boarding. Replacing a short flight is not just about carbon. It is often about choosing a transport mode that feels more rational overall.
Push for better systems
Individual travelers can do a lot, but structural change matters just as much. Reports and commentary around short-haul flight substitution repeatedly stress that governments and transport providers need to support rail more aggressively. Greenpeace calls for bans on short-haul flights where greener alternatives already exist, especially trains under six hours. Related reporting says that replacing the busiest short-haul flights in the EU where rail under six hours exists could save millions of tons of CO2e per year.
Pricing is another key issue. Greenpeace UK reported that low-cost flights can still be dramatically cheaper than equivalent trains on many routes, which discourages people from making the greener choice even when they want to. If policymakers want large-scale change, they need to align prices, booking systems, and infrastructure with climate goals rather than forcing travelers to choose between sustainability and affordability. Climate Action Accelerator also recommends defining acceptable cost increases and integrating train and plane tickets to make greener travel easier to adopt.
What travelers can do now
Travelers do not need to wait for perfect policy to start replacing short flights. A few practical habits can make a big difference:
- Check whether the route is under 300 to 400 kilometers, because that is often the range where rail, bus, or car can already compete strongly with flights.
- Compare total door-to-door time, not just the flight duration.
- Prioritize direct trains or coaches for city-to-city routes where airports add extra friction.
- Use rail for short feeder legs into major hubs when possible instead of taking a connection flight.
- Consider overnight trains, coaches, or ferries where daytime time loss would otherwise be the main barrier. This aligns with broader calls to make daytime and night train alternatives more accessible.
- Support operators and policies that make low-carbon ground transport easier, cheaper, and more visible.
A smarter replacement
Replacing short flights with greener transportation options is one of the fastest ways to cut travel emissions without giving up mobility. The evidence is already strong: many short-haul routes can be covered by train in under six hours, ground transport can match door-to-door travel times on routes up to about 400 kilometers, and rail usually produces far fewer emissions than flying.
The broader lesson is that convenience has been defined too narrowly. A short flight may look efficient in a booking engine, but once you account for time, stress, city access, and climate impact, trains, buses, ferries, and mixed overland routes often make more sense. For travelers who want a realistic way to reduce their footprint, replacing short flights is not a symbolic gesture. It is one of the most practical changes they can make.