Cheap Flights from Portland to London
Browse current best options from Portland. Become a member to unlock all deals and get alerts when new deals appear.
Deals from
Portland
RatePunk searches hundreds of travel sites at once for deals on flights to London
Prices updated today
485 airlines compared
80%+ AI score for best value
Fares are subject to change and may not be available for all dates. (Data last updated Nov 2, 2026.)
Today’s best flight deals from Portland to London
Explore current cheapest deals departing from Portland to London
2027-03-01 – 2027-03-16
PDX - London
85% AI deal score
$713
$572
Round trip
2026-12-07 – 2026-12-11
PDX - London
73% AI deal score
$912
$613
Round trip
2026-11-16 – 2026-11-23
PDX - London
80% AI deal score
$708
$639
Round trip
2027-04-20 – 2027-04-29
PDX - London
70% AI deal score
$885
$658
Round trip
2026-12-08 – 2026-12-15
PDX - London
80% AI deal score
$799
$666
Round trip
2027-03-01 – 2027-03-08
PDX - London
75% AI deal score
$718
$681
Round trip
2026-12-08 – 2026-12-14
PDX - London
89% AI deal score
$945
$692
Round trip
2026-12-01 – 2026-12-11
PDX - London
82% AI deal score
$835
$708
Round trip
2026-12-08 – 2026-12-14
PDX - London
78% AI deal score
$800
$717
Round trip
2026-12-08 – 2026-12-13
PDX - London
88% AI deal score
$969
$726
Round trip