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

Return flights

23 Mar - 30 Mar	Air Canada
09 Mar - 16 Mar	Lufthansa
24 Mar - 31 Mar	Air Canada
29 Mar - 08 Apr	Lufthansa
29 Mar - 11 Apr	Air France
26 Mar - 04 Apr	Lufthansa
03 Mar - 10 Mar	Air Canada
31 Mar - 12 Apr	Lufthansa
31 Mar - 11 Apr	Lufthansa
09 Mar - 31 Mar	Air Canada
01 Mar - 10 Mar	Air Canada
01 Mar - 19 Mar	Lufthansa
12 Mar - 16 Mar	Lufthansa
27 Mar - 11 Apr	Air France
28 Mar - 11 Apr	Air France
09 Mar - 19 Mar	Austrian Airlines
15 Mar - 19 Mar	Lufthansa
28 Mar - 08 Apr	Air Canada
26 Mar - 06 Apr	Spirit Airlines

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.

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Cheapest return flights from Houston to London in March from $489

Return flights