How long is the flight from Houston to London?

Non-stop flights on IAH → LHR are typically around 9 hours. Connecting itineraries add 3–8 hours depending on the hub and layover.

Which airlines fly from Houston to London?

The main carriers on this route are British Airways, United. Codeshare and one-stop options add several more — the filter panel above shows every airline in the current fare set.

When is the cheapest time to fly from Houston to London?

Historically the lowest fares land in January, November. Summer (mid-June through mid-August) and the Christmas / New Year window are always peak. Mid-week departures (Tuesday–Thursday) typically beat weekend prices by 10–20%.

How far ahead should I book Houston to London?

Six to ten weeks ahead is the sweet spot for this route. Inside three weeks, fares tend to spike as airlines sell to last-minute business travellers. Award availability often opens 10–11 months out if you're booking on miles.

Can I book directly on destination.com?

The Book button on each fare opens the airline or OTA (Trip.com, Kiwi, Expedia, Booking, Priceline, etc.) that's actually selling that ticket. You complete payment there at the same price you saw here — we never add a markup.

IAH → LHR

Houston to London flights.

Live cached fares on Houston (IAH) → London (LHR), refreshed every 30 minutes. Non-stop and connecting itineraries side by side — compare airlines, times and stops, then book in one click.

Flying time
~9h non-stop
Airlines
British Airways, United
Cheapest months
January, November

Flex dates · cheapest nearby

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Read our best-time-to-book guide for IAH → LHR →Target price, booking window, weekday pattern.

See 30-day price history for IAH → LHR →Median fare, lows, and best-day patterns.

No cached fares for exactly 2026-12-06 → 2026-12-13. Showing recent fares on IAH → LHR — pick a different date in the calendar above or run a live search.

Houston → London · 3 fares12-month low · $407

Cached from Travelpayouts · filter & sort below

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Try a nearby airport

Thin routes often have more options from a neighbouring airport.

Houston (HOU) → London (LHR)

nearby origin

Houston (IAH) → London (LGW)

nearby destination

Houston (IAH) → London (STN)

nearby destination

About Houston → London

Two daily non-stops (BA, UA). Houston is the logical connector for Texas → Europe + the Star hub at IAH to all of North America.

Typical non-stop flying time is around 9 hours. Major carriers on this route include British Airways, United. Fares are usually cheapest in January, November — book 6–10 weeks ahead and avoid school-holiday peaks (late June–August, Christmas–New Year) for the best pricing.

Month-by-month price guide: Houston to London

Live cheapest round-trip fare cached on IAH → LHR for each of the next 12 months. Tap any month and run a live search to confirm.

Oct
No data
Nov
Low
from $866
Dec
Shoulder
from $939
Jan
No data
Feb
No data
Mar
No data
Apr
Peak
from $986
May
No data
Jun
No data
Jul
No data
Aug
Peak
from $979
Sep
No data

Cheapest next 12 months: November from $866 round-trip. Run a live search →

Booking window tip

Long-haul fares are most predictable when booked 10-16 weeks ahead. Inside six weeks expect sharp increases, especially in premium cabins. If you're paying with miles, search 330+ days ahead when award inventory first loads.

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Where to stay

Once you’ve booked the flight, pick a London neighbourhood.

See where to stay in London →

Questions, answered

How long is the flight from Houston to London?
Non-stop flights on IAH → LHR are typically around 9 hours. Connecting itineraries add 3–8 hours depending on the hub and layover.
Which airlines fly from Houston to London?
The main carriers on this route are British Airways, United. Codeshare and one-stop options add several more — the filter panel above shows every airline in the current fare set.
When is the cheapest time to fly from Houston to London?
Historically the lowest fares land in January, November. Summer (mid-June through mid-August) and the Christmas / New Year window are always peak. Mid-week departures (Tuesday–Thursday) typically beat weekend prices by 10–20%.
How far ahead should I book Houston to London?
Six to ten weeks ahead is the sweet spot for this route. Inside three weeks, fares tend to spike as airlines sell to last-minute business travellers. Award availability often opens 10–11 months out if you're booking on miles.
Can I book directly on destination.com?
The Book button on each fare opens the airline or OTA (Trip.com, Kiwi, Expedia, Booking, Priceline, etc.) that's actually selling that ticket. You complete payment there at the same price you saw here — we never add a markup.

Other ways to reach London

If your plans are flexible on the origin, these alternate departure airports also serve London on the routes we track.

Other popular routes

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