Washington (IAD) – London (LHR)
- Distance
- 5,917 km
- 3,677 mi · 3,195 nm
- Flight time
- 7 h 19 min / 8 h 17 min
- Average gate to gate: IAD → LHR / back
- Time difference
- 5 h
- CO2 per passenger
- 691 kg
- One way, economy, incl. RF (409 kg CO2 only)
- Passengers / year
- 800,971
- Aug 2025 – Jul 2026 · −3.1%
- Flights / week
- 75
- Both directions, average
- Seats filled
- 77%
- 1,038,457 seats a year
- Airlines nonstop
- 3
- BA, UA, VS
Traffic: U.S. DOT, Bureau of Transportation Statistics, T-100 Segment (all carriers, scheduled service), Aug 2025 – Jul 2026. Distance: WGS-84 ellipsoid. CO2: UK DESNZ 2026 factors. Sources
The way there
- Heading from IAD
- 49°
- Heading from LHR
- 289°
- Halfway point
- 52.07, -43.97
- Great-circle km
- 5,902 km (sphere, for EU261)
- In the air IAD → LHR
- 6 h 44 min
- In the air LHR → IAD
- 7 h 38 min
- Clocks
- London is 5 h ahead of Washington
The estimate for a route without real times is 7 h 45 min; how it is worked out is on Sources.
Show as a table
| Month | Passengers |
|---|---|
| Aug 2025 | 85,305 |
| Sep 2025 | 74,079 |
| Oct 2025 | 71,423 |
| Nov 2025 | 55,885 |
| Dec 2025 | 63,000 |
| Jan 2026 | 49,730 |
| Feb 2026 | 39,292 |
| Mar 2026 | 60,623 |
| Apr 2026 | 67,007 |
| May 2026 | 73,035 |
| Jun 2026 | 78,278 |
| Jul 2026 | 83,314 |
Show as a table
| Month | Flights |
|---|---|
| Aug 2025 | 364 |
| Sep 2025 | 358 |
| Oct 2025 | 335 |
| Nov 2025 | 295 |
| Dec 2025 | 294 |
| Jan 2026 | 281 |
| Feb 2026 | 249 |
| Mar 2026 | 301 |
| Apr 2026 | 346 |
| May 2026 | 364 |
| Jun 2026 | 344 |
| Jul 2026 | 355 |
Airlines flying IAD–LHR nonstop
| Airline | Flights / week | Share of passengers |
|---|---|---|
| BABritish Airways | 34 | 48% |
| UAUnited Air Lines | 28 | 36% |
| VSVirgin Atlantic Airways | 13 | 16% |
Both directions, Aug 2025 – Jul 2026. Airlines with at least one flight a month. U.S. DOT, Bureau of Transportation Statistics, T-100 Segment (all carriers, scheduled service). Sources
Aircraft on this route
- Boeing 777-200ER/200LR/233LR · 1,828 flights
- B787-900 Dreamliner · 504 flights
- Boeing 777-300/300ER/333ER · 245 flights
- Airbus Industrie A330-300/333 · 243 flights
- Boeing 767-400/ER · 223 flights
- Airbus Industrie A380-800 · 197 flights
- Airbus 350-1000 · 179 flights
- Airbus A330-900neo · 157 flights
Also carried: 20,651 tonnes of freight and 35 tonnes of mail a year (passenger and cargo flights).
Delay compensation (EU261 / UK261)
Measured by great-circle distance: 5,902 km.
IAD Washington → LHR London
UK261£520 for arriving 3 hours or more late (£260 if 3–4 hours).
Covers UK or EU airlines only.
LHR London → IAD Washington
UK261£520 for arriving 3 hours or more late (£260 if 3–4 hours).
Covers any airline.
Also owed for a cancellation with less than 14 days' notice or denied boarding. Not owed for extraordinary circumstances. On a connection, the distance to the final destination counts. From 23 October 2027 the EU's Regulation 2026/2202 applies; it keeps these amounts (what changes in 2027). Information, not legal advice.
Every airport pair between Washington and London
| LHR | LGW | STN | LTN | LCY | SEN | |
|---|---|---|---|---|---|---|
| IAD | 5,917 | 5,947 | 5,948 | 5,909 | 5,950 | 5,989 |
| DCA | 5,896 | 5,926 | 5,927 | 5,888 | 5,929 | 5,969 |
| BWI | 5,849 | 5,878 | 5,880 | 5,841 | 5,881 | 5,921 |
Kilometres. Linked numbers have a page of their own. All Washington airports · All London airports