AirHint found the following cheapest return flights from Portland (PDX) to London (LHR) in July 2026 (see full year).

Return flights

28 Jul - 14 Aug	Iberia
27 Jul - 14 Aug	Iberia
28 Jul - 14 Aug	British Airways	direct
27 Jul - 14 Aug	British Airways	direct
07 Jul - 28 Jul	Air Canada
24 Jul - 02 Aug	Finnair
13 Jul - 24 Jul	Delta
24 Jul - 02 Aug	British Airways	direct
11 Jul - 25 Jul	Air Canada
11 Jul - 25 Jul	British Airways	direct
03 Jul - 18 Jul	Delta
01 Jul - 18 Jul	Air Canada
01 Jul - 18 Jul	British Airways	direct
26 Jul - 02 Aug	Icelandair
01 Jul - 08 Jul	Icelandair
16 Jul - 23 Jul	Icelandair
11 Jul - 18 Jul	Icelandair

Also check the deals for one-way flights from Portland to London in July.

The deals are updated regularly. The prices may go up as tickets are purchased by other travellers. Only the cheapest flights are offered. Select a price to book and secure these cheap prices.

Book a cheap hotel in London

Cheap car rent in London

Cheapest return flights from Portland to London in July from 599€

Return flights