AirHint found the following cheapest return flights from St. Louis (STL) to London (LHR) in January 2026 (see full year).
Return flights
| 08 Jan - 15 Jan | KLM | ||
| 07 Jan - 31 Jan | Austrian Airlines | ||
| 08 Jan - 31 Jan | Virgin Atlantic | ||
| 15 Jan - 07 Feb | Virgin Atlantic | ||
| 01 Jan - 11 Jan | Delta | ||
| 02 Jan - 05 Jan | Lufthansa |
Also check the deals for one-way flights from St. Louis to London in January.
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