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

One-Way flights

31 Mar	WestJet
16 Mar	WestJet
23 Mar	WestJet
05 Mar	Frontier Airlines
14 Mar	jetBlue
23 Mar	British Airways	direct
16 Mar	British Airways	direct
31 Mar	British Airways	direct
14 Mar	Iberia	direct
19 Mar	British Airways	direct

Also check the deals for return 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 one-way flights from Houston to London in March from $246

One-Way flights