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

Return flights

13 Mar - 16 Mar	Air Canada
10 Mar - 19 Mar	Brussels Airlines
03 Mar - 10 Mar	Lufthansa
04 Mar - 17 Mar	Air France
22 Mar - 31 Mar	Air Canada
01 Mar - 10 Mar	Virgin Atlantic
16 Mar - 25 Mar	Delta
04 Mar - 11 Mar	Delta
17 Mar - 24 Mar	Air France
04 Mar - 10 Mar	Air France
31 Mar - 07 Apr	Air Canada
26 Mar - 29 Apr	Lufthansa
30 Mar - 05 Apr	Delta
31 Mar - 05 Apr	Delta
29 Mar - 05 Apr	Delta
14 Mar - 05 Apr	Air Canada
30 Mar - 05 Apr	United	direct
31 Mar - 05 Apr	United	direct
29 Mar - 05 Apr	United	direct
26 Mar - 29 Apr	United	direct

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

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 March from $557

Return flights