Cheapest return flights from Portland (PDX) to London (LHR), September

Select a price to book. see full year.

Dates, airline, and price
Dates Airline Price
23 Sep 07 Oct Icelandair
15 Sep 06 Oct Delta
15 Sep 08 Oct Delta
16 Sep 24 Sep Delta
04 Sep 11 Sep Icelandair
23 Sep 07 Oct British Airways
Direct Flight
10 Sep 17 Sep Delta
04 Sep 14 Sep Virgin Atlantic
15 Sep 20 Sep Delta
11 Sep 25 Sep Delta
15 Sep 20 Sep British Airways
Direct Flight
11 Sep 25 Sep Finnair
Direct Flight
04 Sep 11 Sep British Airways
Direct Flight
04 Sep 14 Sep British Airways
Direct Flight
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deals for one-way flights from Portland to London in September.

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Updated May 21, 2026.

About these fares

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