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

Return flights

18 Mar - 24 Mar	Air Canada
04 Mar - 11 Mar	Air Canada
25 Mar - 31 Mar	Air Canada
17 Mar - 31 Mar	Iberia	direct
25 Mar - 31 Mar	Iberia	direct
18 Mar - 25 Mar	Delta
03 Mar - 28 Mar	Air Canada
18 Mar - 01 Apr	Air Canada
19 Mar - 11 Apr	Iberia	direct
07 Mar - 15 Mar	Air Canada
06 Mar - 14 Mar	Delta
13 Mar - 23 Mar	Delta
22 Mar - 05 Apr	Air Canada
27 Mar - 04 Apr	American Airlines
27 Mar - 04 Apr	United	direct
26 Mar - 05 Apr	United	direct
28 Mar - 04 Apr	British Airways

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 $498

Return flights