AirHint found the following cheapest return flights from Portland (PDX) to London (LHR) in July 2026 (see full year).
Return flights
| 31 Jul - 15 Aug | British Airways | direct | |
| 03 Jul - 18 Jul | Delta | ||
| 01 Jul - 19 Jul | British Airways | direct | |
| 03 Jul - 18 Jul | British Airways | direct | |
| 14 Jul - 21 Jul | Icelandair | ||
| 04 Jul - 11 Jul | Icelandair |
Also check the deals for one-way flights from Portland to London in July.
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