AirHint found the following cheapest return flights from Houston (IAH) to London (LHR) in September 2026 (see full year).

Return flights

22 Sep - 07 Oct	KLM
01 Sep - 10 Sep	Air France
07 Sep - 18 Sep	Delta
24 Sep - 28 Sep	Air France
22 Sep - 07 Oct	British Airways	direct
01 Sep - 10 Sep	United	direct
07 Sep - 18 Sep	British Airways	direct
09 Sep - 20 Sep	Virgin Atlantic
01 Sep - 18 Sep	Air Canada
27 Sep - 10 Oct	KLM
04 Sep - 13 Sep	KLM
27 Sep - 10 Oct	British Airways	direct
21 Sep - 26 Sep	Air France
04 Sep - 13 Sep	British Airways	direct

Also check the deals for one-way flights from Houston to London in September.

The deals are updated regularly. The prices may go up as tickets are purchased by other travellers. Only the cheapest flights are offered. Select a price to book and secure these cheap prices.

Book a cheap hotel in London

Cheap car rent in London

Cheapest return flights from Houston to London in September from 547€

Return flights