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 · Updated May 30, 2026
344 km
214 miles · Flight: ~56 min · Drive: ~5h 35min
✓ Shorter route
1,434 km
891 miles · Flight: ~2h 18min · Drive: ~23h 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 | ~5h 35min | ~23h 18min |
| Road distance (est.) | ~447 km | ~1,864 km |
| Drivable? | Yes | Yes |
| Cross-continental | No | No |
| Initial bearing | 148° (SSE) | 133° (SE) |
| Time-zone shift | None | +1h |
| CO₂ – flight (per pax) | ~88 kg | ~366 kg |
| CO₂ – driving (per car) | ~76 kg | ~319 kg |
| Fuel cost (est.) | ~$45 USD | ~$186 USD |
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. For comparison, driving emits roughly 76 kg and 319 kg per car respectively — meaningful only when the car carries multiple passengers.
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. If driving is an option, expect roughly 5h 35min for the first route and 23h 18min for the second.
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.
Both routes are drivable, with road distances of approximately 447 km and 1,864 km respectively. For road trips, the shorter route saves roughly 1,417 km of driving.
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. Driving is realistic at this distance, with an estimated 447 km of road and a fuel cost band around $45 USD. 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. Driving is feasible — expect roughly 1,864 km of road and a fuel cost in the $186 USD range. Departing London, the great-circle bearing toward Rome is 133° (SE).
London (51.51°, -0.13°) and Paris (48.86°, 2.35°) sit in the same approximate time zone. London (51.51°, -0.13°) and Rome (41.90°, 12.50°) have a +1-hour offset. Both routes have manageable time-zone 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.
📍 Data: Coordinates from OpenStreetMap contributors. Distances calculated using the Haversine formula. Travel times are estimates only. Last verified: May 30, 2026.