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

Return flights

10 May - 18 May	KLM
12 May - 22 May	Air France
05 May - 14 May	KLM
06 May - 14 May	KLM
05 May - 13 May	Delta
11 May - 03 Jun	Air Canada
12 May - 22 May	United	direct
05 May - 14 May	United	direct
06 May - 14 May	United	direct
05 May - 13 May	United	direct
11 May - 20 May	United	direct
10 May - 10 Jun	Delta
10 May - 10 Jun	United	direct
18 May - 08 Jun	Air Canada
21 May - 03 Jun	Air France
18 May - 08 Jun	Lufthansa	direct
20 May - 07 Jun	Air Canada
20 May - 06 Jun	Air Canada
09 May - 13 Jun	Delta
20 May - 06 Jun	United	direct

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

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 May from 528€

Return flights