Are these the guaranteed airline ticket prices?

No. AirHint displays the lowest fares we found in a recent search. Airlines change prices often; confirm the total on the booking site before you pay.

How current are these prices?

Results refresh when you open or revisit this page. Last snapshot: Sep 3, 2026.

Where do I complete my booking?

Use the price buttons to continue on our booking partner's site. AirHint surfaces fares; ticketing is completed with the airline or agency.

Cheapest one-way flights from Portland (PDX) to London (LHR)

Click a month below to see all dates for that month.

All destinations from Portland (PDX)

Lowest fare by month
Month	Price
September 2026	$ 443
October 2026	$ 321
November 2026	$ 301
December 2026	$ 302
January 2027	$ 302
April 2027	$ 311
May 2027	$ 373
August 2027	$ 335

deals for return flights from Portland to London.

Book a cheap hotel in London

Cheap car rent in Heathrow

Updated Sep 3, 2026.

About these fares

These results come from our latest search across airlines for your currency. Prices change quickly and are not locked until you complete booking—always confirm the total and fare rules on the partner site.

Find your flight now

Feel free to contact us with any feedback or request another flight research.

Cheapest one-way flights from Portland (PDX) to London (LHR)

About these fares

Sign In

User Name