AirHint found the following cheapest one-way flights from Washington (IAD) to London (LGW) in April 2026 (see full year).
One-Way flights
| 01 Apr | Frontier Airlines | ||
| 20 Apr | TAP | ||
| 04 Apr | Frontier Airlines | ||
| 02 Apr | Frontier Airlines | ||
| 30 Apr | TAP | ||
| 25 Apr | TAP | ||
| 24 Apr | TAP | ||
| 18 Apr | TAP | ||
| 11 Apr | Icelandair | ||
| 17 Apr | TAP |
Also check the deals for return flights from Washington to London in April.
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