Flight time from Houston to London
A nonstop flight from Houston (IAH) to London (LHR) takes about 9 h 30 min. Flying back from London to Houston takes about 10 h 50 min. The two airports are 4,824 miles (7,763 km) apart.
| Route | Typical nonstop time | Leave 9:00 AM, land (local time) |
|---|---|---|
| IAH → LHR | 9h 30m | Houston → 12:30 AM the next day |
| LHR → IAH | 10h 50m | London → 1:50 PM |
Example arrival times are for a departure on November 18, 2026. Times are estimates of gate-to-gate block time, from the great-circle distance, typical jet cruising speeds, average upper-level winds and about 45 minutes for taxi, take-off, climb and landing. They are not airline schedules, and we don't track which airlines fly this route nonstop. Real flights vary by aircraft, routing, season and the day's wind; check your airline for the exact time.
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Time difference
London is 6 hours ahead of Houston right now. Allow for it when you plan: the clock at your destination may show a very different time from the hours you spent in the air. See the time now in Houston and London, or compare them in the time zone converter.
The Houston to London flight is usually quicker than London to Houston. High-altitude winds, led by the jet stream, mostly blow from west to east, so planes heading east ride a tailwind and planes heading west fight a headwind. On busy routes the difference shows up in airline timetables every day.
Questions people ask
How long is the flight from Houston to London?
A nonstop flight from Houston (IAH) to London (LHR) takes about 9 h 30 min, gate to gate. The return flight takes about 10 h 50 min.
How far is London from Houston?
4,824 miles (7,763 km) along the great-circle route, the shortest path over the Earth between IAH and LHR airports.
What is the time difference between Houston and London?
London is 6 hours ahead of Houston right now. The difference can change by an hour during the year when one city changes its clocks for daylight saving time and the other does not.
If I leave Houston at 9 a.m., when do I arrive in London?
Leaving Houston at 9:00 AM on November 18, 2026, you would land in London at about 12:30 AM the next day local time.
More flight times
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Last updated October 21, 2026. Airport locations: OurAirports via airportsdata; time zones: IANA time zone database 2026.