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

Return flights

23 Jan - 29 Jan	Lufthansa
07 Jan - 14 Jan	British Airways
13 Jan - 20 Jan	British Airways
28 Jan - 04 Feb	British Airways
09 Jan - 31 Jan	Air Canada
16 Jan - 23 Jan	British Airways
19 Jan - 26 Jan	British Airways
22 Jan - 29 Jan	British Airways
25 Jan - 01 Feb	British Airways
21 Jan - 24 Jan	Air Canada
10 Jan - 17 Jan	British Airways
01 Jan - 11 Jan	Virgin Atlantic
31 Jan - 07 Feb	British Airways

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

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 St. Louis to London in January from $648

Return flights