Cheap flights from the United Kingdom to Portland from $374

The cheapest month to fly to Portland from United Kingdom is in September. Flight prices, which tend to average around $747, are often lower during this time because this is during the off-season. If you don’t want to visit Portland in September, then you should wait until February to fly from United Kingdom, when ticket prices are also cheap, with an average price of $788.

The cheapest day to depart on your flight to Portland is on a Saturday when prices can be found for as low as $886. This is often the case because there is less demand to fly during this day of the week. The most expensive day to fly to Portland is Tuesday, with ticket prices averaging around $1,224.

The cheapest time of day to fly to Portland is at noon when flights can be purchased for as low as $874. In the afternoon is when there is more demand to fly to Portland, so prices are often more expensive at around $950 per ticket.

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

You are more likely to see cheaper flights to Portland from United Kingdom when booking weeks ahead of your departure date. In general, you can expect to find flights to Portland for around $886 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Portland from United Kingdom for as low as $785 on momondo.

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

Icelandair, Lufthansa, and British Airways are the most popular carriers operating from United Kingdom to Portland

British Airways, American Airlines and United Airlines are the top three most popular airlines that fly to Portland from United Kingdom according to our data. British Airways is the first choice among our users, with 67% of people opting to fly with this airline when traveling to Portland. Keep in mind that there are 3 different airlines that fly to Portland on a routine basis, so you have a few additional options to choose from.

Historically, on average around 20% of flights between United Kingdom and Portland have experienced a delay on any given week. The average delay length over the past 12 months has been 120 minutes.

Generally, flights departing in the early afternoon tend to experience fewer delays. Flights in the early afternoon have, in the past, seen delays more frequently in comparison.

Friday is statistically the day of the week which experiences the fewest number of delays on this flight route. Wednesday has historically seen more delays on average compared to the rest of the week.

According to our data, British Airways have had the least number of delays on this route over the last 12 months; with about 20% of their flights experiencing any sort of delay.

As of February 2026, 26 flights take off from United Kingdom and land in Portland each week. The most common flight departure day for this route is Wed, with 46% of weekly flights taking off on this day.

On average, it takes 12h 50m to fly from United Kingdom to Portland if you fly out of Manchester (the most popular airport in United Kingdom) and into Portland (the most popular airport in Portland). If you’re flying out of London and into Portland, then the flight time is around 13h 15m.