August is the cheapest month to fly this route, with average fares around $857 round trip.
Average round-trip fares by departure month, based on current availability.
| Month | Avg Price | Lowest | Relative Cost | |
|---|---|---|---|---|
| May 2026 | $1225 | $1088 | Peak | |
| June 2026 | $1174 | $1086 | ||
| July 2026 | $1071 | $949 | ||
| August 2026 | $857 | $724 | Best |
Departing on Tuesday offers the lowest average fares at $1061. Friday departures are the most expensive at $1178, a difference of $117.
The best time to fly is August. Set up an alert and we'll notify you when prices drop.
Get Started Free →The cheapest month to fly from Houston to London is August, with average round-trip fares around $857. The lowest fare found in August is $724.
Tuesday departures are the cheapest, averaging $1061 round trip. The most expensive day is Friday at $1178.
Based on current pricing trends, booking for August travel offers the best value. Avoid May if possible, as fares average $1225 compared to $857 in the cheapest month. June is a solid middle-ground option at $1174.
Flying in August instead of May can save you approximately $368 per round trip. The cheapest month averages $857 while the most expensive averages $1225.
Airlines, flight times, price calendar, and more for Houston to London
View IAH → LHR Details