Houston (IAH) – London (LHR)
- Distance
- 7,780 km
- 4,834 mi · 4,201 nm
- Flight time
- 9 h 12 min / 10 h 16 min
- Average gate to gate: IAH → LHR / back
- Time difference
- 6 h
- CO2 per passenger
- 909 kg
- One way, economy, incl. RF (538 kg CO2 only)
- Passengers / year
- 510,582
- Aug 2025 – Jul 2026 · −2.2%
- Flights / week
- 52
- Both directions, average
- Seats filled
- 74%
- 694,636 seats a year
- Airlines nonstop
- 2
- UA, BA
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 IAH
- 41°
- Heading from LHR
- 293°
- Halfway point
- 51.46, -57.96
- Great-circle km
- 7,763 km (sphere, for EU261)
- In the air IAH → LHR
- 8 h 42 min
- In the air LHR → IAH
- 9 h 37 min
- Clocks
- London is 6 h ahead of Houston
The estimate for a route without real times is 10 h; how it is worked out is on Sources.
Show as a table
| Month | Passengers |
|---|---|
| Aug 2025 | 44,826 |
| Sep 2025 | 41,325 |
| Oct 2025 | 44,422 |
| Nov 2025 | 34,960 |
| Dec 2025 | 44,586 |
| Jan 2026 | 35,884 |
| Feb 2026 | 26,659 |
| Mar 2026 | 43,306 |
| Apr 2026 | 39,079 |
| May 2026 | 47,505 |
| Jun 2026 | 53,818 |
| Jul 2026 | 54,212 |
Show as a table
| Month | Flights |
|---|---|
| Aug 2025 | 222 |
| Sep 2025 | 230 |
| Oct 2025 | 237 |
| Nov 2025 | 213 |
| Dec 2025 | 218 |
| Jan 2026 | 210 |
| Feb 2026 | 190 |
| Mar 2026 | 216 |
| Apr 2026 | 223 |
| May 2026 | 245 |
| Jun 2026 | 239 |
| Jul 2026 | 244 |
Airlines flying IAH–LHR nonstop
| Airline | Flights / week | Share of passengers |
|---|---|---|
| UAUnited Air Lines | 28 | 54% |
| BABritish Airways | 24 | 46% |
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 · 1,462 flights
- Boeing 777-300/300ER/333ER · 414 flights
- B787-900 Dreamliner · 406 flights
- Boeing 787-10 Dreamliner · 280 flights
- B787-800 Dreamliner · 123 flights
- Airbus Industrie A380-800 · 2 flights
Also carried: 24,520 tonnes of freight and 91 tonnes of mail a year (passenger and cargo flights).
Delay compensation (EU261 / UK261)
Measured by great-circle distance: 7,763 km.
IAH Houston → LHR London
UK261£520 for arriving 3 hours or more late (£260 if 3–4 hours).
Covers UK or EU airlines only.
LHR London → IAH Houston
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 Houston and London
Kilometres. Linked numbers have a page of their own. All Houston airports · All London airports
More routes from IAH
| Route | Distance | Passengers / year |
|---|---|---|
| IAH → ORD | 1,489 km | 1,711,056 |
| IAH → DEN | 1,387 km | 1,641,444 |
| IAH → LAX | 2,219 km | 1,544,652 |
| IAH → ATL | 1,109 km | 1,430,755 |
| IAH → DFW | 361 km | 1,257,452 |
| IAH → SFO | 2,632 km | 1,223,236 |
| IAH → MCO | 1,375 km | 1,147,728 |
| IAH → EWR | 2,252 km | 1,135,261 |
| IAH → LGA | 2,279 km | 1,049,227 |
| IAH → LAS | 1,966 km | 1,028,809 |