Compare: Paris→Dublin (781 km) vs Paris→London (344 km). Paris → London wins by 437 km (56%). Side-by-side with flight & drive times.
By SnapDistance Team
781 km
485 miles · Flight: ~1h 29min
344 km
214 miles · Flight: ~56 min
✓ Shorter route
Difference: 437 km (56%) · Flight time difference: ~33 min
Verdict
Paris → London is the smarter pick if travel time and emissions matter most: it is 437 km (56%) shorter, saves about 33 min of flight time, and cuts roughly 111 kg of CO₂ per passenger. Choose Paris → Dublin only if the destination itself is the reason for the trip.
Paris → London is the shorter route at 344 km, which is 437 km (56%) shorter than Paris → Dublin. You would save approximately 33 min in flight time by choosing the shorter route.
| Metric | Paris → Dublin | Paris → London |
|---|---|---|
| Distance (km) | 781 | 344 |
| Distance (miles) | 485 | 214 |
| Flight time | ~1h 29min | ~56 min |
| 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 | 313° (NW) | 330° (NNW) |
| Time-zone shift | -1h | -1h |
| CO₂ – flight (per pax) | ~199 kg | ~88 kg |
| CO₂ – driving (per car) | — | — |
| Fuel cost (est.) | — | — |
Flying from Paris to Dublin produces roughly 199 kg of CO₂ per passenger, based on the ICAO/EEA short-haul emission factor of ~0.255 kg per passenger-km. The Paris → London flight emits about 88 kg. Choosing the shorter route saves approximately 111 kg of CO₂ per traveler — equivalent to 5 typical tree-years of carbon sequestration.
The Paris to Dublin route covers 781 km (485 miles), staying within Europe. Paris (population: 2,161,000) is located in Île-de-France, France, while Dublin (population: 554,554) is in Leinster, Ireland.
The Paris to London route covers 344 km (214 miles), remaining within Europe. Paris (population: 2,161,000) is in Île-de-France, France, and London (population: 8,982,000) is in England, United Kingdom.
Flying from Paris to Dublin takes approximately 1h 29min, while Paris to London takes 56 min.
Since both routes depart from Paris, this comparison is especially useful for travelers deciding between Dublin and London as a destination.
The 437 km difference between these routes is substantial and will significantly impact travel time and cost.
Neither route has a road figure we can defend. There is no continuous road connection between Paris and Dublin — the two cities sit on separate landmasses, so the journey requires air or sea transport. Yes — you can drive from Paris to London 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.
Dublin (Ireland) has a population of 554,554 and is located in the Leinster region of Europe. It's a charming destination known for its regional character.
London (United Kingdom) has a population of 8,982,000 and is situated in England, Europe. This major global city has multiple airports and world-class infrastructure.
Choose this route if your priority is reaching Dublin (Ireland) — a city of 554,554 in the Leinster region of Europe. Despite being the longer of the two at 781 km, it makes sense when Dublin itself is the destination, the schedule fits better, or ticket prices are noticeably lower. This is a fly-only route in practice — overland travel is not realistic at 781 km. The initial bearing is 313° (NW), so a great-circle flight leaves Paris heading roughly NW.
This route is the right call if you are heading to London (United Kingdom) — a city of 8,982,000 in the England region of Europe. It is also the shorter of the two at 344 km, saving about 33 min of flying and around 111 kg of CO₂ per passenger. Overland travel is not practical for 344 km; flying is the realistic mode. Departing Paris, the great-circle bearing toward London is 330° (NNW).
Paris (48.86°, 2.35°) → Dublin (53.35°, -6.26°): Paris keeps Europe/Paris time and Dublin keeps Europe/Dublin time — a gap of about 1 hour, with Dublin behind. 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. Paris (48.86°, 2.35°) → London (51.51°, -0.13°): Paris keeps Europe/Paris time and London keeps Europe/London time — a gap of about 1 hour, with London behind. 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.
London is closer at 344 km, which is 437 km (56%) shorter.
781 km (485 miles). Flight: ~1h 29min.
344 km (214 miles). Flight: ~56 min.
Flying to London is faster at ~56 min, saving about 33 min compared to Dublin.
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.