Portland (PDX) to London Heathrow (LHR) cheap flight deal from $514 USD in economy class

FIIcelandair

Round Trip•Economy

PDX

Portland International Airport

Portland, United States

LHR

London Heathrow Airport

London Heathrow, United Kingdom

$947 USD

-46%$514 USD

Verified Sep 19, 2025 at 3:48 PM

October 2025

Today

Mon

Tue

Wed

Thu

Fri

Sat

Sun

29$531 30$1,048 1$620 2$670 3$1,257 4$524 5$1,221 6$524 7$1,123 8$995 9$524 10 11$526 12 13$526 14$1,125 15$524 16$524 17$1,173 18$638 19$1,048 20$524 21 22$588 23$720 24$638 25$528 26 27$530 28$588 29 30$753 31 1 2

Fair Availability

22% of dates checked are available within 10% of the lowest price

Saturday, October 18th, 2025

10 round-trip options

Returning

Thu, Oct 23, 2025•5 Day Trip

$640 USD

Google Flights

Returning

Fri, Oct 24, 2025•6 Day Trip

$756 USD

Google Flights

Returning

Sat, Oct 25, 2025•7 Day Trip

$1,161 USD

Google Flights

Returning

Sun, Oct 26, 2025•8 Day Trip

$1,079 USD

Google Flights

Returning

Mon, Oct 27, 2025•9 Day Trip

$1,441 USD

Google Flights

Returning

Tue, Oct 28, 2025•10 Day Trip

$786 USD

Google Flights

Returning

Wed, Oct 29, 2025•11 Day Trip

$638 USD

Google Flights

Returning

Thu, Oct 30, 2025•12 Day Trip

$640 USD

Google Flights

Returning

Fri, Oct 31, 2025•13 Day Trip

$638 USD

Google Flights

Returning

Sat, Nov 1, 2025•14 Day Trip

$640 USD

Google Flights