George Bush Intercontinental (IAH) to Heathrow (LHR). Served by United, British Airways.
| Departure | Return | Price |
|---|---|---|
| 08/04/2026 | 08/12/2026 | $724 |
| 08/05/2026 | 08/12/2026 | $724 |
| 08/05/2026 | 08/13/2026 | $724 |
| 08/05/2026 | 08/14/2026 | $890 |
| 08/03/2026 | 08/12/2026 | $895 |
| 08/04/2026 | 08/13/2026 | $895 |
| 08/02/2026 | 08/11/2026 | $914 |
| 08/03/2026 | 08/11/2026 | $914 |
| 08/04/2026 | 08/11/2026 | $914 |
| 08/05/2026 | 08/11/2026 | $914 |
Based on current fares, August is the cheapest month to fly from Houston to London, with average fares around $857 round trip (as low as $724).
May tends to be more expensive, averaging $1225.
See the full month-by-month and day-of-week price analysis
Best Time to Fly IAH → LHRDeparture date prices (economy, round trip). Green = cheap, red = expensive.
The cheapest month to fly from Houston to London is August, with average round-trip fares around $857. Fares in August start as low as $724. The most expensive month is May, averaging $1225.
A nonstop flight from Houston to London takes approximately 10h.
United and British Airways fly from IAH to LHR. That's 2 airlines serving this route.
The cheapest flight from Houston to London currently starts at $724 round trip in economy class.
The average round-trip flight price from Houston to London is $1206 in economy class.
The distance is 4842 miles (7791 km). with a nonstop flight time of about 10h. Airlines on this route include United, British Airways. The lowest fare currently available is $724 departing in August. The average round-trip fare is $1206.
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