Compare: London→Prague (1,034 km) vs London→Vienna (1,235 km). London → Prague wins by 201 km (16%). Side-by-side with flight & drive times.
By SnapDistance Team
1,034 km
642 miles · Flight: ~1h 48min
✓ Shorter route
1,235 km
767 miles · Flight: ~2h 3min
Difference: 201 km (16%) · Flight time difference: ~15 min
Verdict
London → Prague is the smarter pick if travel time and emissions matter most: it is 201 km (16%) shorter, saves about 15 min of flight time, and cuts roughly 51 kg of CO₂ per passenger. Choose London → Vienna only if the destination itself is the reason for the trip.
London → Prague is the shorter route at 1,034 km, which is 201 km (16%) shorter than London → Vienna. You would save approximately 15 min in flight time by choosing the shorter route.
| Metric | London → Prague | London → Vienna |
|---|---|---|
| Distance (km) | 1,034 | 1,235 |
| Distance (miles) | 642 | 767 |
| Flight time | ~1h 48min | ~2h 3min |
| 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 | 93° (E) | 101° (E) |
| Time-zone shift | +1h | +1h |
| CO₂ – flight (per pax) | ~264 kg | ~315 kg |
| CO₂ – driving (per car) | — | — |
| Fuel cost (est.) | — | — |
Flying from London to Prague produces roughly 264 kg of CO₂ per passenger, based on the ICAO/EEA short-haul emission factor of ~0.255 kg per passenger-km. The London → Vienna flight emits about 315 kg. Choosing the shorter route saves approximately 51 kg of CO₂ per traveler — equivalent to 2 typical tree-years of carbon sequestration.
The London to Prague route covers 1,034 km (642 miles), staying within Europe. London (population: 8,982,000) is located in England, United Kingdom, while Prague (population: 1,309,000) is in Bohemia, Czech Republic.
The London to Vienna route covers 1,235 km (767 miles), remaining within Europe. London (population: 8,982,000) is in England, United Kingdom, and Vienna (population: 1,911,191) is in Vienna, Austria.
Flying from London to Prague takes approximately 1h 48min, while London to Vienna takes 2h 3min.
Since both routes depart from London, this comparison is especially useful for travelers deciding between Prague and Vienna as a destination.
The 201 km difference between these routes is noticeable in both travel time and fuel or ticket costs.
Neither route has a road figure we can defend. Yes — you can drive from London to Prague 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 Vienna 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.
Prague (Czech Republic) has a population of 1,309,000 and is located in the Bohemia region of Europe. It's a significant city with good transport links and cultural offerings.
Vienna (Austria) has a population of 1,911,191 and is situated in Vienna, Europe. This city serves as an important regional hub with solid connectivity.
Choose this route if your priority is reaching Prague (Czech Republic) — a city of 1,309,000 in the Bohemia region of Europe. It is also the shorter option at 1,034 km, which translates to a 15 min flight-time saving and roughly 51 kg less CO₂ per passenger versus the alternative. This is a fly-only route in practice — overland travel is not realistic at 1,034 km. The initial bearing is 93° (E), so a great-circle flight leaves London heading roughly E.
This route is the right call if you are heading to Vienna (Austria) — a city of 1,911,191 in the Vienna region of Europe. Even though it is the longer route at 1,235 km, it remains the obvious pick when Vienna is the actual destination, when departure schedules from London are more convenient, or when fares undercut the alternative. Overland travel is not practical for 1,235 km; flying is the realistic mode. Departing London, the great-circle bearing toward Vienna is 101° (E).
London (51.51°, -0.13°) → Prague (50.08°, 14.44°): London keeps Europe/London time and Prague keeps Europe/Prague time — a gap of about 1 hour, with Prague 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°) → Vienna (48.21°, 16.37°): London keeps Europe/London time and Vienna keeps Europe/Vienna time — a gap of about 1 hour, with Vienna 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.
Prague is closer at 1,034 km, which is 201 km (16%) shorter.
1,034 km (642 miles). Flight: ~1h 48min.
1,235 km (767 miles). Flight: ~2h 3min.
Flying to Prague is faster at ~1h 48min, saving about 15 min compared to Vienna.
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.