Cheapest return flights from St. Louis to London in May from $848

AirHint found the following cheapest return flights from St. Louis (STL) to London (LGW) in May 2026 (see full year).

Return flights

13 May - 20 May Air Canada
12 May - 19 May British Airways
01 May - 08 May Alaska Airlines
13 May - 27 May Iberia
04 May - 18 May Alaska Airlines
19 May - 01 Jun British Airways
19 May - 28 May Alaska Airlines
19 May - 26 May Iberia
27 May - 11 Jun Alaska Airlines
05 May - 10 May Air Canada

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

Powered by

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.

Book a cheap hotel in London

Cheap car rent in London

Feel free to contact us with any feedback or request another flight research.