Cheap flights from Portland Oregon to London Heathrow

from as little as £531

23 nights in London, departing Portland Oregon on 04 / Sep / 2025 with British Airways (price found 12 hours ago)

Subject to availability, prices correct of the last 24 hours
London Heathrow

The Portland Oregon / London Heathrow route

All 7891 km of it

Cheap flight deals for this route

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London Heathrow flight facts

What you need to know

Alternative flights from the UK to London Heathrow

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Alternative flights from Portland Oregon to London Heathrow

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London Heathrow

04 / Sep / 2025 is currently the lowest priced day of the year to fly the Portland Oregon/London Heathrow route. There are around 105 flights on any given week from the UK to London Heathrow and the cheapest month to fly right now is September.

Not suitable? Try running another search or viewing all cheap flight deals.

Min / Max Temperature (°C)
LOWEST

2 °C

AVG

11 °C

HIGHEST

24 °C

Rainfall (mm)
LOWEST

38.1 mm

AVG

52.5 mm

HIGHEST

66 mm

Key facts about London Heathrow

How to get cheap flights from Portland Oregon to London Heathrow

Tips and advice from our flight experts

There are ten airlines offering flights to London. The most direct route isn’t necessarily the cheapest – being flexible is key to finding the lowest airfare rates. For example, try searching by month to see the best time of the week to fly. The cheapest date is currently 04 / Sep / 2025.

Make sure you use the search options above to search for flights to other airports in London, not just London Heathrow. The more options you look at, the better your chance of finding a cheap deal. Just so you know, the flight typically takes 11 hrs 5 mins.

105 flights go to or via London every week. Cheap flights Currently, the cheapest price available is £531. The most popular airline is British Airways but do spend some time checking all your options – they aren’t necessarily the cheapest airline to book with.

During this peak season, hotel and holiday prices often increase too, so it's best to book early. Or you could keep your fingers crossed and hold out for a last-minute deal.

Other popular destinations near London Heathrow

Where other people are flying to

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