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

Return flights

17 Mar - 24 Mar	Air Canada
02 Mar - 11 Mar	Air Canada
02 Mar - 11 Mar	Iberia	direct
17 Mar - 24 Mar	British Airways	direct
26 Mar - 30 Mar	Air Canada
04 Mar - 08 Mar	Air France
16 Mar - 23 Mar	British Airways	direct
31 Mar - 20 Apr	Air Canada
06 Mar - 13 Mar	Delta
31 Mar - 20 Apr	British Airways	direct
06 Mar - 14 Mar	Delta
13 Mar - 22 Mar	Air Canada
26 Mar - 05 Apr	United	direct
26 Mar - 02 Apr	British Airways	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.

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Cheapest return flights from Houston to London in March from $490

Return flights