Portland (PDX) to London Heathrow (LHR) cheap flight deal from $571 USD in economy class

AAAmerican Airlines

AYFinnair

Portland International Airport

Portland, United States

LHR

London Heathrow Airport

London Heathrow, United Kingdom

$918 USD

-38%$571 USD

Verified Sep 19, 2025 at 6:33 PM

September 2025

Today

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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19$3,479 20$842 21$792 22$792 23$792 24$792 25$842 26$842 27$842 28$792 29$792 30$792 1$792 2$842 3$803 4$799 5$749

Extremely Rare Availability

3% of dates checked are available within 10% of the lowest price

Friday, September 19th, 2025

6 round-trip options

Returning

Wed, Sep 24, 2025•5 Day Trip

$4,297 USD

Google Flights

Returning

Thu, Sep 25, 2025•6 Day Trip

$4,297 USD

Google Flights

Returning

Fri, Sep 26, 2025•7 Day Trip

$3,479 USD

Google Flights

Returning

Sat, Sep 27, 2025•8 Day Trip

$4,399 USD

Google Flights

Returning

Thu, Oct 2, 2025•13 Day Trip

$3,522 USD

Google Flights

Returning

Fri, Oct 3, 2025•14 Day Trip

$3,897 USD

Google Flights