Compare: London→Paris (344 km) vs London→Rome (1,434 km). London → Paris wins by 1,090 km (76%). Side-by-side with flight & drive times.
By SnapDistance Team
344 km
214 miles · Flight: ~56 min
✓ Shorter route
1,434 km
891 miles · Flight: ~2h 18min
Difference: 1,090 km (76%) · Flight time difference: ~1h 22min
Verdict
London → Paris is the smarter pick if travel time and emissions matter most: it is 1,090 km (76%) shorter, saves about 1h 22min of flight time, and cuts roughly 278 kg of CO₂ per passenger. Choose London → Rome only if the destination itself is the reason for the trip.
London → Paris is the shorter route at 344 km, which is 1,090 km (76%) shorter than London → Rome. You would save approximately 1h 22min in flight time by choosing the shorter route.
| Metric | London → Paris | London → Rome |
|---|---|---|
| Distance (km) | 344 | 1,434 |
| Distance (miles) | 214 | 891 |
| Flight time | ~56 min | ~2h 18min |
| Driving time | No road estimate | No road estimate |
| Road distance (rough estimate) | Not published | Not published |
| Continuous road link? | No | No |
| Cross-continental | No | No |
| Initial bearing | 148° (SSE) | 133° (SE) |
| Time-zone shift | +1h | +1h |
| CO₂ – flight (per pax) | ~88 kg | ~366 kg |
| CO₂ – driving (per car) | — | — |
| Fuel cost (est.) | — | — |
Flying from London to Paris produces roughly 88 kg of CO₂ per passenger, based on the ICAO/EEA short-haul emission factor of ~0.255 kg per passenger-km. The London → Rome flight emits about 366 kg. Choosing the shorter route saves approximately 278 kg of CO₂ per traveler — equivalent to 13 typical tree-years of carbon sequestration.
The London to Paris route covers 344 km (214 miles), staying within Europe. London (population: 8,982,000) is located in England, United Kingdom, while Paris (population: 2,161,000) is in Île-de-France, France.
The London to Rome route covers 1,434 km (891 miles), remaining within Europe. London (population: 8,982,000) is in England, United Kingdom, and Rome (population: 2,873,000) is in Lazio, Italy.
Flying from London to Paris takes approximately 56 min, while London to Rome takes 2h 18min.
Since both routes depart from London, this comparison is especially useful for travelers deciding between Paris and Rome as a destination.
The 1,090 km difference between these routes is substantial and will significantly impact travel time and cost.
Neither route has a road figure we can defend. Yes — you can drive from London to Paris by taking your car through the Channel Tunnel (Le Shuttle, Folkestone–Calais, about 35 minutes) or on a cross-Channel ferry. Because part of the trip is a rail or sea crossing, SnapDistance does not publish a single road-distance figure for this pair. Yes — you can drive from London to Rome by taking your car through the Channel Tunnel (Le Shuttle, Folkestone–Calais, about 35 minutes) or on a cross-Channel ferry. Because part of the trip is a rail or sea crossing, SnapDistance does not publish a single road-distance figure for this pair.
Paris (France) has a population of 2,161,000 and is located in the Île-de-France region of Europe. It's a significant city with good transport links and cultural offerings.
Rome (Italy) has a population of 2,873,000 and is situated in Lazio, Europe. This city serves as an important regional hub with solid connectivity.
Choose this route if your priority is reaching Paris (France) — a city of 2,161,000 in the Île-de-France region of Europe. It is also the shorter option at 344 km, which translates to a 1h 22min flight-time saving and roughly 278 kg less CO₂ per passenger versus the alternative. This is a fly-only route in practice — overland travel is not realistic at 344 km. The initial bearing is 148° (SSE), so a great-circle flight leaves London heading roughly SSE.
This route is the right call if you are heading to Rome (Italy) — a city of 2,873,000 in the Lazio region of Europe. Even though it is the longer route at 1,434 km, it remains the obvious pick when Rome is the actual destination, when departure schedules from London are more convenient, or when fares undercut the alternative. Overland travel is not practical for 1,434 km; flying is the realistic mode. Departing London, the great-circle bearing toward Rome is 133° (SE).
London (51.51°, -0.13°) → Paris (48.86°, 2.35°): London keeps Europe/London time and Paris keeps Europe/Paris time — a gap of about 1 hour, with Paris ahead. The exact gap moves when either zone switches to or from daylight saving, so use the live figure in the calculator for your travel dates. London (51.51°, -0.13°) → Rome (41.90°, 12.50°): London keeps Europe/London time and Rome keeps Europe/Rome time — a gap of about 1 hour, with Rome ahead. The exact gap moves when either zone switches to or from daylight saving, so use the live figure in the calculator for your travel dates. Both gaps come from the cities' real IANA zones and move with daylight saving. Both routes have manageable shifts, so jet lag should not be a major factor.
Paris is closer at 344 km, which is 1,090 km (76%) shorter.
344 km (214 miles). Flight: ~56 min.
1,434 km (891 miles). Flight: ~2h 18min.
Flying to Paris is faster at ~56 min, saving about 1h 22min compared to Rome.
All distances on SnapDistance are calculated using the Haversine formula, which determines the great-circle distance between two points on Earth's surface. This gives the shortest possible distance over the globe, which is the measurement used for aviation and navigation. Actual travel distances by road or rail are typically 20-40% longer due to terrain, borders, and infrastructure routing. Flight times assume 800 km/h cruising speed with 30 minutes for takeoff and landing. Driving estimates use 80 km/h average speed with a 30% road distance factor.