Question 1

What are the cheapest airlines flying from Portland to London round-trip?

Accepted Answer

Cheapflights users have booked flights from Portland to London round-trip from £461. Other airlines that can offer you cheap pricing are Delta, from £463, and Virgin Atlantic, from £463. British Airways is 24% cheaper than the average price of flights available within the next 90 days to this destination.

Question 2

What are the cheapest airlines to fly from Portland to London one-way?

Accepted Answer

£215 is the cheapest one-way deal found within the past few days, from WestJet. You may also be able to find cheap deals on Icelandair and British Airways, with prices starting from £221 and £290, respectively.

Question 3

How far ahead should I book a flight from Portland to London?

Accepted Answer

Booking 90 days in advance of your planned departure date is, on average, the best time to get cheap flights from Portland to London. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

Question 4

What is the cheapest month to book a flight from Portland to London?

Accepted Answer

Currently, January is the cheapest month in which you can book a flight from Portland to London (average of £112). Flying from Portland to London in August is currently the most expensive (average of £164). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

Question 5

What is the cheapest day to fly from Portland to London?

Accepted Answer

Travellers seeking maximum savings on their Portland to London flight should consider departing on Friday evenings when fares are most often at their lowest. Saturday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.

Question 6

Weekly flight availability from Portland to London

Accepted Answer

The most flights from PDX to LON are scheduled on a Monday (7 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (7 on average).

Question 7

E

Accepted Answer

In terms of precipitation, rainfall in London ranges from 40.0 - 70.0 inches per month. January is typically the wettest month, when rainfall can reach 70.0 mm. July is typically the driest time to visit London when rainfall is around 40.0 mm.

Question 8

E

Accepted Answer

If weather is an important factor for your trip to London, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 17.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 4.0 C).

Question 9

What are the most popular routes from Portland to London?

Accepted Answer

When deciding which route to take from Portland to London consider Portland - London Heathrow, Portland - London Gatwick or Portland - London City as they are the most popular.

Question 10

What are the cheapest flights from Portland to London?

Accepted Answer

Looking at all options, your cheapest flight can be booked for £308. While the most popular route (Portland - London Heathrow) can be booked for £371 on average our data indicates £1,590 when flying from Portland to London.

Question 11

What are the most reliable airlines from Portland to London?

Accepted Answer

The top 3 most reliable airlines when flying from Portland to London are American Airlines (82%), Alaska Airlines (82%) and Aer Lingus (82%).

Question 12

What are the most popular airlines that fly from Portland to London?

Accepted Answer

The most popular airlines flying from Portland to London are British Airways, Iberia and Virgin Atlantic. Something to consider prior to booking your flight.

Question 13

What is the cheapest day to fly round-trip from Portland to London?

Accepted Answer

Friday flights are found to be more expensive to fly from Portland to London. This shouldn’t discourage you from searching, as you can still find great deals by being flexible with your options. Use our search form to find deals on tickets to London.

Question 14

How far in advance should I book a flight from Portland to London?

Accepted Answer

To save up to 25% on this flight, we recommend booking at least 39 days prior to travel. The price may fluctuate and will likely increase closer to your departure date. Users on Cheapflights have found tickets from Portland to London from £570 1-2 weeks out and tickets from £619 for flights departing within the next 72 hours.

Question 15

What is the cheapest month to fly from Portland to London?

Accepted Answer

October can be a great time to fly to London from Portland with a flight ticket averaging about £609. Cheapflights users have found deals in the month of October for as cheap as £386. The most expensive prices can be found in the month of June.

Question 16

What is the cheapest time of day to fly from PDX to LON?

Accepted Answer

When flying from Portland to London, the time of day you fly usually plays a role in the price. Save by searching for a flight in the evening, which can drop the price by up to 25% versus a flight at midday.

Question 17

What airport do you fly from for flights from Portland to London?

Accepted Answer

For a flight from Portland to London, you will be flying from Portland. Portland (PDX) is just 6.0 mi from the center of the city. Portland is the only Portland airport and it handles 7 outbound flights to London per day. 3 airlines have flights to London from Portland on a regular basis.

Question 18

Can I find deals for flights from Portland to London that include hotel bookings?

Accepted Answer

Yes. In addition to deals on Portland to London flights, Cheapflights offers holiday packages that include both flights and hotel.

Question 19

How can I find direct flights from Portland to London?

Accepted Answer

After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Portland to London.

Question 20

Can I find deals for business class flights from Portland to London?

Accepted Answer

Yes. Cheapflights offers flight deals from Portland to London by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

Question 21

How does Cheapflights help users find flights from Portland to London?

Accepted Answer

When you search for this flight from Portland to London, Cheapflights searches on 900+ travel sites to save you time finding great flight deals online. Additionally, we offer filter features so you can choose a preferred cabin class or airline, see different price ranges, and much more so you can book the flight for you.

Question 22

Why should you use Cheapflights to find cheap flight tickets from Portland to London?

Accepted Answer

Millions of users choose and trust Cheapflights to book the best flight deals from Portland to London for free. We help you search and compare prices from hundreds of airlines for the right flight just for you.

Question 23

Can Cheapflights find flights from Portland to London with no change fees?

Accepted Answer

Cheapflights does show flights with no change fees to all users. To see these options for flights from Portland to London, users can toggle the no change fees filter when performing a flight search.

Question 24

Can Cheapflights notify me if prices for flights from Portland to London become cheaper?

Accepted Answer

Of course! You can now track prices for flights from Portland to London and get an alert from Cheapflights when they change. Have a valid email address ready and click the bell icon next to the flight deals above to set up your price alerts.

Round-trip from	£461
One-way from	£215
Popular in	June
Cheapest in	October
Average price	£797
Good round-trip deal	£1,357 or less
Good one-way deal	£309 or less

Airline	Cheapest	Average	Flexibility	On-time
Virgin Atlantic	Cheapest£430	Average£499	FlexibilityNo cancel fee	On-time72%	Search Virgin Atlantic flights
Iberia	Cheapest£452	Average£544	FlexibilityNo cancel fee	On-time77%	Search Iberia flights
British Airways	Cheapest£466	Average£537	FlexibilityNo cancel fee	On-time70%	Search British Airways flights

Cheap flights from Portland to London from £215

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 5/10. Fares are subject to change and may not be available on all flights or dates of travel.

Cheapflights Tip: The best prices from Portland to London are usually found in October or April, booked 90 days in advance, depart on a Friday or Tuesday and return on a Tuesday

Cheap flight deals from Portland to London

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Find flight deals from Portland to London

Cheapest flights from Portland to LondonExplore the most affordable flight options available from Portland to London. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 15 July 2025.

Explore the most affordable flight options available from Portland to London. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 15 July 2025.

Cheapflights Fare Finder

Use the filters below to find and compare flights from Portland to London that are best for you.

Best time to book a flight from Portland to London

Have a flexible travel schedule? Discover the best time to fly to London from Portland with our price prediction graph.

Cheapflights Insights

Everything you need to know about your flight from Portland to London

How far ahead should I book a flight from Portland to London?

Use this chart to determine the optimal time to book a return flight from Portland to London. Price data was last updated on 11 July 2025.

What is the cheapest month to book a flight from Portland to London?

What is the cheapest time of day to fly from PDX to LON?

Find hourly flight availability from Portland to London. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 15 July 2025.

Weekly flight availability from Portland to London

Explore weekly flight availability from Portland to London. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated 15 July 2025.

How much does it cost for a return flight from Portland to London?

Reviews of airlines servicing London

Get insights into the airlines that provide service to London. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to London. Reviews last updated 15 July 2025.

Read reviews from past customers who have flown with Delta, KLM, andSWISS from Portland to London. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.

Related info for your journey

Find useful and relevant information for your journey from Portland to London. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

What airport do you fly from for flights from Portland to London?

What are the cheapest airlines flying from Portland to London round-trip?

What are the cheapest airlines to fly from Portland to London one-way?

What are the most popular routes from Portland to London?

What are the most reliable airlines from Portland to London?

What are the cheapest flights from Portland to London?

Can I find deals for flights from Portland to London that include hotel bookings?

How can I find direct flights from Portland to London?

Can I find deals for business class flights from Portland to London?

What is the cheapest month to book a flight from Portland to London?

Travelling to a place near London?

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Alternative routes for Portland to London

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Top 3 airlines flying from Portland to London

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Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from Portland to London?

Why should you use Cheapflights to find cheap flight tickets from Portland to London?

Can Cheapflights find flights from Portland to London with no change fees?

Can Cheapflights notify me if prices for flights from Portland to London become cheaper?

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Cheapest flights from Portland to London
Explore the most affordable flight options available from Portland to London. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 15 July 2025.