AirHint found the following cheapest return flights from Portland (PDX) to London (LHR) in April 2026 (see full year).
Return flights
| 19 Apr - 28 Apr | Delta | ||
| 19 Apr - 28 Apr | British Airways | direct | |
| 09 Apr - 19 Apr | Icelandair | ||
| 18 Apr - 09 May | KLM | ||
| 09 Apr - 02 May | KLM | ||
| 30 Apr - 07 May | Icelandair | ||
| 25 Apr - 02 May | Icelandair |
Also check the deals for one-way flights from Portland to London in April.
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