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Good to Know - Flights from Portland to London

Low Season:
March
Best time to beat the crowds
High Season:
July
Most popular time to fly
Good Deal:
$ 663.91
or less (round trip)

Cheapest Day of the Month to Book Flights



Top Tips for Finding Cheap Flights from Portland to London

Looking for cheap airfare from Portland to London? 25% of our users found round-trip tickets to London for the following price or less: $ 663.91 Book at least 4 weeks before departure in order to get a below-average price. High season is considered to be July. The cheapest month to fly from Portland to London is March. Enter your preferred departure airport and travel dates into the search form above to unlock the latest Portland to London flight deals.

FAQs - Booking from Portland to London flights

How long is the flight from Portland to London?
A flight from Portland to London takes 13hours5minutes.
What is the cheapest flight Portland to London?:
The cheapest flight Portland to London found on flyus.com in the last 72 hours was $663.91 round-trip.
 
Which airlines fly to London?:
• Icelandair
• Condor Flugdienst
• LOT Polish Airlines
• United Airlines
• Air Canada
• Lufthansa
• Brussels Airlines
• SWISS
• SAS Scandinavian Airlines
• American Airlines
• British Airways
 

Find cheap flights from Portland to London and book discounted airfare from different cities all over the United States. Explore airline ticket deals on flight routes all over the World! At Flyus, we take pride in helping you discover and book the best flight deals for your next trip at the cheapest price. We make booking flights from different departures easy and provide you with peace of mind with our Best Purchase Guarantee.

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Cheapest Flights
from Portland, United States (PDX) to:

  • London, United Kingdom (LHR)
    Apr 21, 25 - May 14, 25
    $663.91
    Search

  • London, United Kingdom (LHR)
    Apr 29, 25 - May 21, 25
    $664.11
    Search

  • London, United Kingdom (LHR)
    Apr 26, 25 - May 21, 25
    $664.11
    Search

  • London, United Kingdom (LHR)
    Apr 28, 25 - May 21, 25
    $664.11
    Search

  • London, United Kingdom (LHR)
    May 04, 25 - May 14, 25
    $664.11
    Search