AirHint found the following cheapest return flights from Louisville (SDF) to London (LHR) in May 2026 (see full year).
Return flights
| 06 May - 13 May | Delta | ||
| 07 May - 13 May | Delta | ||
| 08 May - 22 May | American Airlines | ||
| 07 May - 17 May | Delta | ||
| 16 May - 24 May | Air Canada | ||
| 17 May - 24 May | Air Canada |
Also check the deals for one-way flights from Louisville to London in May.
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