Cheap flights from Oregon to London from £183

The cheapest month to fly to London from Oregon is in April. Flight prices, which tend to average around £344, are often lower during this time because this is during the off-season. The month of March is another great option to travel to London, with average flight prices from Oregon averaging around £344.

Our data shows that Friday is the least expensive day to fly to London. Tickets to fly out on this day can be as low as £525. When flying out on a Thursday, the most expensive travel day of the week, you can expect to see flight prices from Oregon to London for around £981.

The cheapest time of day to fly to London is in the afternoon when flights can be purchased for as low as £526. Flights in the evening are often more expensive, with an average ticket price of £772.

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

You are more likely to see cheaper flights to London from Oregon when booking weeks ahead of your departure date. In general, you can expect to find flights to London for around £645 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to London from Oregon for as low as £551 on momondo.

As of May 2026, there are 7 flights per day flying from Oregon to London. The most common time of day flights depart is 19:00, with 100% of flights taking off in the evening.

49 flights are operational weekly from Oregon to London as of May 2026. The most popular departure day for this route is Mon, with 14% of flights per week taking off on this day.