Cheap Flights from London to Portland
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Deals from
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RatePunk searches hundreds of travel sites at once for deals on flights to Portland
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 London to Portland
Explore current cheapest deals departing from London to Portland
2026-11-25 – 2026-11-30
LON - Portland
77% AI deal score
£555
£536
Round trip
2027-01-23 – 2027-01-26
LON - Portland
77% AI deal score
£590
£579
Round trip
2027-01-23 – 2027-01-27
LON - Portland
77% AI deal score
£590
£579
Round trip
2027-02-03 – 2027-02-17
LON - Portland
75% AI deal score
£539
£585
Round trip
2027-02-08 – 2027-02-15
LON - Portland
76% AI deal score
£619
£587
Round trip
2027-01-18 – 2027-01-25
LON - Portland
74% AI deal score
£533
£589
Round trip
2026-11-10 – 2026-11-17
LON - Portland
75% AI deal score
£546
£591
Round trip
2026-11-21 – 2026-11-30
LON - Portland
78% AI deal score
£667
£592
Round trip
2027-01-06 – 2027-01-13
LON - Portland
75% AI deal score
£563
£593
Round trip
2027-01-11 – 2027-01-17
LON - Portland
76% AI deal score
£553
£595
Round trip