Cheap flights from Oregon to London from £232

In general, October is the cheapest month to fly from Oregon to London Heathrow Airport. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around £507. The month of January is another great option to travel to London Heathrow Airport, with average flight prices from Oregon averaging around £520.

On average, the least expensive day to fly to London Heathrow Airport from Oregon is on a Wednesday. momondo users have found tickets for Wednesday departures for as low as £497. However, this price may fluctuate depending on the airline, the season, and holidays. Be sure to avoid booking your departure on a Thursday as prices are generally higher than usual. According to our data, the average ticket price to London Heathrow Airport on Thursday is £819.

According to our data, the cheapest time of day to fly to London Heathrow Airport is in the evening. momondo users have found flights departing from Oregon to London Heathrow Airport in the evening for as low as £547. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. If you have a flexible travel schedule, then try to avoid flying in the afternoon when prices are £635 on average. Flights to London Heathrow Airport from Oregon in the afternoon are generally more expensive because this time of day is more convenient for travellers’ schedules.

Fly from Portland to London Heathrow for the best Oregon - London Heathrow flight prices

You are more likely to see cheaper flights to London Heathrow Airport from Oregon when booking weeks ahead of your departure date. In general, you can expect to find flights to London Heathrow Airport for around £640 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to London Heathrow Airport from Oregon for as low as £570 on momondo.

There are 3 cabin classes available to choose from on Oregon to London Heathrow flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

As of April 2026, 6 flights take off from Oregon and land in London Heathrow Airport each day. The most common flight departure time for this route is 18:00, with 100% of daily flights taking off in the evening.

As of April 2026, there are 45 flights per week flying from Oregon to London Heathrow Airport. The most common day of the week flights depart is Tue, with 16% of flights taking off on this day.