London (LHR) – Chicago (ORD)
- Distance
- 6,362 km
- 3,953 mi · 3,435 nm
- Flight time
- 8 h 46 min / 7 h 54 min
- Average gate to gate: LHR → ORD / back
- Time difference
- 6 h
- CO2 per passenger
- 742 kg
- One way, economy, incl. RF (439 kg CO2 only)
- Passengers / year
- 1,036,729
- Aug 2025 – Jul 2026 · −3.2%
- Flights / week
- 110
- Both directions, average
- Seats filled
- 83%
- 1,251,939 seats a year
- Airlines nonstop
- 3
- AA, BA, UA
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 LHR
- 298°
- Heading from ORD
- 48°
- Halfway point
- 55.70, -48.99
- Great-circle km
- 6,344 km (sphere, for EU261)
- In the air LHR → ORD
- 8 h 3 min
- In the air ORD → LHR
- 7 h 18 min
- Clocks
- Chicago is 6 h behind London
The estimate for a route without real times is 8 h 15 min; how it is worked out is on Sources.
Show as a table
| Month | Passengers |
|---|---|
| Aug 2025 | 107,533 |
| Sep 2025 | 106,214 |
| Oct 2025 | 97,635 |
| Nov 2025 | 65,897 |
| Dec 2025 | 75,757 |
| Jan 2026 | 64,299 |
| Feb 2026 | 52,211 |
| Mar 2026 | 75,904 |
| Apr 2026 | 85,013 |
| May 2026 | 102,910 |
| Jun 2026 | 103,982 |
| Jul 2026 | 99,374 |
Show as a table
| Month | Flights |
|---|---|
| Aug 2025 | 550 |
| Sep 2025 | 538 |
| Oct 2025 | 505 |
| Nov 2025 | 390 |
| Dec 2025 | 429 |
| Jan 2026 | 410 |
| Feb 2026 | 367 |
| Mar 2026 | 433 |
| Apr 2026 | 509 |
| May 2026 | 555 |
| Jun 2026 | 533 |
| Jul 2026 | 525 |
Airlines flying LHR–ORD nonstop
| Airline | Flights / week | Share of passengers |
|---|---|---|
| AAAmerican Airlines | 36 | 37% |
| BABritish Airways | 34 | 36% |
| UAUnited Air Lines | 41 | 27% |
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 767-300/300ER · 2,071 flights
- B787-900 Dreamliner · 1,923 flights
- Boeing 787-10 Dreamliner · 840 flights
- Boeing 777-200ER/200LR/233LR · 746 flights
- Boeing 777-300/300ER/333ER · 130 flights
- B787-800 Dreamliner · 28 flights
- Boeing 747-400 · 4 flights
- Boeing 767-400/ER · 1 flight
Also carried: 51,428 tonnes of freight and 1,277 tonnes of mail a year (passenger and cargo flights).
Delay compensation (EU261 / UK261)
Measured by great-circle distance: 6,344 km.
LHR London → ORD Chicago
UK261£520 for arriving 3 hours or more late (£260 if 3–4 hours).
Covers any airline.
ORD Chicago → LHR London
UK261£520 for arriving 3 hours or more late (£260 if 3–4 hours).
Covers UK or EU airlines only.
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 London and Chicago
Kilometres. Linked numbers have a page of their own. All London airports · All Chicago airports
More routes from LHR
More routes from ORD
| Route | Distance | Passengers / year |
|---|---|---|
| ORD → LGA | 1,180 km | 2,736,902 |
| ORD → LAX | 2,808 km | 2,332,419 |
| ORD → SFO | 2,971 km | 1,976,484 |
| ORD → DEN | 1,430 km | 1,974,190 |
| ORD → MCO | 1,617 km | 1,924,694 |
| ORD → DFW | 1,290 km | 1,916,312 |
| ORD → BOS | 1,395 km | 1,886,038 |
| ORD → EWR | 1,157 km | 1,731,402 |
| ORD → IAH | 1,489 km | 1,711,056 |
| ORD → PHX | 2,317 km | 1,706,053 |