Long-distance travel (LDT) accounts for a small proportion of trips but contributes significantly to passenger travel emissions. In England, LDT makes up 2.7% of trips but accounts for 61.3% of miles and 69.3% of greenhouse gas (GHG) emissions. LDT is increasing, while shorter-distance travel is decreasing. Leisure and social travel are the largest contributors to LDT miles and emissions, which are also increasing. Per capita travel emissions have slowly decreased since 2007 but remain higher than in 1997. The study introduces a new metric, emissions reduction sensitivity, to assess the efficiency of travel demand reduction strategies. LDT, especially flying, offers much higher emissions reduction sensitivity compared to urban travel, suggesting the need for targeted policies. The transport sector accounts for 30% of global energy use and 37% of CO₂ emissions. Despite its significant share in national emissions, transport has been one of the hardest sectors to decarbonize. Between 1990 and 2019, transport emissions decreased by less than 5%, while other sectors reduced emissions by 44%. Passenger travel is the main source of transport emissions in developed economies, highlighting the importance of passenger transport in decarbonization efforts. Decarbonization requires both technological solutions and changes in travel demand and behavior. LDT constitutes a small portion of all passenger trips but contributes significantly to miles and emissions. Estimates for these are rare, and studies on the evolution of LDT over time are even rarer. Flying, an important mode for LDT, is often considered separately in decarbonization strategies. Understanding LDT is crucial for effective GHG mitigation from the passenger transport sector. The study uses England as a case study, combining data from the National Travel Survey (NTS) and International Passenger Survey (IPS) to characterize LDT. The study focuses on the role of LDT in overall passenger travel and GHG emissions, and proposes a new metric to understand the relative decarbonization potential of travel-demand-focused emissions reduction strategies. LDT accounts for a large share of miles and emissions, with international travel contributing significantly due to its high carbon intensity. Domestic travel is dominated by car travel, but international travel, though a small proportion of trips, contributes a large share of miles and emissions. LDT is primarily conducted within Great Britain, but international LDT trips contribute substantially to both miles and emissions. Air travel is the largest contributor to total passenger miles and emissions, despite being a small proportion of trips. LDT is dominated by car travel, but air travel contributes significantly to miles and emissions. LDT by journey purpose shows that leisure and social travel account for a large share of miles and emissions. International travel for leisure and social purposes is increasing, contributing significantly to LDT miles and emissions. Temporal analysis shows that domestic short- and long-distance trips have been decreasing since 2Long-distance travel (LDT) accounts for a small proportion of trips but contributes significantly to passenger travel emissions. In England, LDT makes up 2.7% of trips but accounts for 61.3% of miles and 69.3% of greenhouse gas (GHG) emissions. LDT is increasing, while shorter-distance travel is decreasing. Leisure and social travel are the largest contributors to LDT miles and emissions, which are also increasing. Per capita travel emissions have slowly decreased since 2007 but remain higher than in 1997. The study introduces a new metric, emissions reduction sensitivity, to assess the efficiency of travel demand reduction strategies. LDT, especially flying, offers much higher emissions reduction sensitivity compared to urban travel, suggesting the need for targeted policies. The transport sector accounts for 30% of global energy use and 37% of CO₂ emissions. Despite its significant share in national emissions, transport has been one of the hardest sectors to decarbonize. Between 1990 and 2019, transport emissions decreased by less than 5%, while other sectors reduced emissions by 44%. Passenger travel is the main source of transport emissions in developed economies, highlighting the importance of passenger transport in decarbonization efforts. Decarbonization requires both technological solutions and changes in travel demand and behavior. LDT constitutes a small portion of all passenger trips but contributes significantly to miles and emissions. Estimates for these are rare, and studies on the evolution of LDT over time are even rarer. Flying, an important mode for LDT, is often considered separately in decarbonization strategies. Understanding LDT is crucial for effective GHG mitigation from the passenger transport sector. The study uses England as a case study, combining data from the National Travel Survey (NTS) and International Passenger Survey (IPS) to characterize LDT. The study focuses on the role of LDT in overall passenger travel and GHG emissions, and proposes a new metric to understand the relative decarbonization potential of travel-demand-focused emissions reduction strategies. LDT accounts for a large share of miles and emissions, with international travel contributing significantly due to its high carbon intensity. Domestic travel is dominated by car travel, but international travel, though a small proportion of trips, contributes a large share of miles and emissions. LDT is primarily conducted within Great Britain, but international LDT trips contribute substantially to both miles and emissions. Air travel is the largest contributor to total passenger miles and emissions, despite being a small proportion of trips. LDT is dominated by car travel, but air travel contributes significantly to miles and emissions. LDT by journey purpose shows that leisure and social travel account for a large share of miles and emissions. International travel for leisure and social purposes is increasing, contributing significantly to LDT miles and emissions. Temporal analysis shows that domestic short- and long-distance trips have been decreasing since 2