London to Philadelphia Flight Distance
London Heathrow Airport (LHR) to Philadelphia International Airport (PHL)
Primary sources · 6
- [1] Vincenty (1975) — Direct and Inverse Solutions of Geodesics on the Ellipsoid — the iterative formula used for distance · Survey Review XXIII (176), pp. 88–93 · April 1975 https://www.ngs.noaa.gov/PUBS_LIB/inverse.pdf
- [2] NGA.STND.0036_1.0.0_WGS84 — WGS-84 reference ellipsoid (a = 6,378,137 m, 1/f = 298.257223563) · NGA Standard · July 2014 https://earth-info.nga.mil/index.php?dir=wgs84&action=wgs84
- [3] DESNZ 2024 conversion factors — Per-km kg CO₂e factors for the three distance bands and four cabin classes · UK Department for Energy Security and Net Zero · June 2024 https://www.gov.uk/government/publications/greenhouse-gas-reporting-conversion-factors-2024
- [4] Lee et al. (2021) — Effective radiative forcing of aviation — the science behind the 1.9 × CO₂ → CO₂e uplift · Atmospheric Environment 244, 117834 · January 2021 https://doi.org/10.1016/j.atmosenv.2020.117834
- [5] OpenFlights — Airport coordinates and IATA codes · openflights.org/data.php · Community-maintained https://openflights.org/data.php
- [6] Sack (2010) — Jet-lag review — clinical chronobiology and asymmetric recovery rates · New England Journal of Medicine 362:440 · February 2010 https://www.nejm.org/doi/full/10.1056/NEJMcp0909838
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Your Route Summary
What This Means For Your Trip
Flight Duration: At 3,545 miles, this long-haul flight will take approximately 7h 33m. Plan for a substantial flight with meals, entertainment, and rest time.
Time Adjustment: Philadelphia is 5 hours behind London. Expect mild jet lag with 1-2 days to fully adjust.
Environmental Impact: An economy class seat produces approximately 856 kg of CO2. Consider carbon offset programs—planting 78 trees could offset this flight.
Flight Options: 5 airlines serve this route, giving you options for schedule and price comparison.
Complete Flight Analysis
| Metric | Value | Category / Reference |
|---|---|---|
| Distance (Miles) | 3,545 mi | Primary frequent flyer unit |
| Distance (Kilometers) | 5,705 km | International standard |
| Distance (Nautical Miles) | 3,080 nm | Aviation standard |
| Flight Time | 7h 33m | Based on 850 km/h cruise + ground time |
| Route Classification | LONG HAUL | Long-haul flight (4,000 - 12,000 km) |
| Flight Direction | 288° WNW | West-Northwest |
| Cruising Altitude | 39,000 ft | FL390 (11,887 m) |
| Time Difference | -5h | Jet lag: mild |
| CO2 (Economy) | 856 kg | DEFRA 2024 factors |
| CO2 (Business) | 2482 kg | 2.9x economy |
| CO2 (First Class) | 3423 kg | 4x economy |
| Trees to Offset | 78 | Economy class, per passenger |
| Fuel per Passenger | 171 L | ~30,780 L total (180 pax) |
| Operating Airlines | 5 | Direct flights available |
Tips for This Route
London Heathrow Airport
London, United Kingdom
Philadelphia International Airport
Philadelphia, United States
Airlines Flying This Route
5 airlines operate flights between London and Philadelphia.
Flight Details
Flight Midpoint
The geographic midpoint of this flight is located at:
Carbon Emissions by Cabin Class
CO2 emissions vary by cabin class due to seat space allocation. Based on DEFRA 2024 emission factors.
Jet Lag & Travel Tips
- Adjust sleep schedule 1-2 hours before departure
- Stay hydrated during the flight
- Get sunlight exposure at destination
Seat Recommendations
Distance in Perspective
Distance & Speed Reference
| Measurement | Value |
|---|---|
| Statute Miles | 3,545 mi |
| Kilometers | 5,705 km |
| Nautical Miles | 3,080 nm |
| Meters | 5,705,000 m |
| Feet | 18,717,600 ft |
| Flight Time (850 km/h) | 7h 33m |
Travel Speed Comparison
How long would it take to cover the 5,705 km between London and Philadelphia at different speeds?
| Mode | Speed | Time |
|---|---|---|
| Commercial Jet | 850 km/h | 7h 33m |
| Turboprop Aircraft | 500 km/h | 11h 25m |
| Bullet Train | 320 km/h | 17h 50m |
| Car (highway) | 100 km/h | 57h 3m |
| Walking | 5 km/h | 1,141h (48 days) |
| Speed of Sound | 1,235 km/h | 4h 37m |
Round Trip Summary
Quick Facts
Frequently Asked Questions
How far is London from Philadelphia?
The flight distance from London Heathrow Airport (LHR) to Philadelphia International Airport (PHL) is 3,545 miles (5,705 km). This is the great circle distance calculated using the Vincenty formula.
How long is the flight?
A direct flight takes approximately 7h 33m. This is a long-haul flight typically cruising at 39,000 feet (FL390).
What is the time difference?
Philadelphia is 5 hours behind London. Expect mild jet lag with ~3 days recovery time.
What airlines fly this route?
5 airlines operate this route: American Airlines, British Airways, Finnair and 2 more.
What is the carbon footprint?
Economy class: 856 kg CO2 per passenger. Business class: 2482 kg. First class: 3423 kg. Offset with ~78 trees.
Which seat side is best?
For this West-Northwest flight, the right side offers the best views away from sun glare. Consider an aisle seat for easier movement on this long flight.
Can I drive from London to Philadelphia instead of flying?
Driving is not practical for this 5,705 km distance, especially across international borders. It would theoretically take over 71 hours of driving. Flying at 7h 33m is the recommended option.
What aircraft typically fly this route?
This long-haul route is typically served by Boeing 777, Airbus A350, Boeing 787 Dreamliner aircraft. Wide-body aircraft are standard for this distance, offering more comfort for the longer journey.
How can I offset the carbon from this flight?
An economy class seat on this route produces 856 kg CO2. You can offset this by planting approximately 78 trees, purchasing verified carbon credits through programs like Gold Standard or Verra, or supporting renewable energy projects. Many airlines also offer built-in carbon offset options during booking.
External Resources & References
Learn more about the airports, aviation data, and carbon emissions methodology used in this calculation.