Question 1

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

Accepted Answer

According to our current data, Scandinavian Airlines (£523), Air Canada (£525), and British Airways (£525) offers the cheapest pricing from Portland to London Heathrow Airport. These flights start at 16% lower than the current average price 3 months from now.

Question 2

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

Accepted Answer

For one-way options, check prices for Icelandair. According to our data, you can fly for as low as £225. Users have also found prices from £281 and £291 on Air Canada and Lufthansa, respectively.

Question 3

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

Accepted Answer

The best time to book flights from Portland to London Heathrow Airport is 55 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

Question 4

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

Accepted Answer

Currently, January is the cheapest month in which you can book a flight from Portland to London Heathrow Airport (average of £112). Flying from Portland to London Heathrow Airport 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 Heathrow Airport?

Accepted Answer

Travellers seeking maximum savings on their Portland to London Heathrow Airport 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 Heathrow Airport

Accepted Answer

The most flights from PDX to LHR 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 Heathrow Airport 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 Heathrow Airport when rainfall is around 40.0 mm.

Question 8

E

Accepted Answer

If weather is an important factor for your trip to London Heathrow Airport, 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 cheapest flights from Portland to London Heathrow Airport?

Accepted Answer

On average you can expect to pay £1,490 for a flight from Portland to London Heathrow Airport. The cheapest flight overall is £315 while the most popular route, (Portland - London Heathrow) is currently priced at £381.

Question 10

What are the most reliable airlines from Portland to London Heathrow Airport?

Accepted Answer

Looking for the most reliable airlines to get you to your destination on time? Our data shows these are most likely to get you from Portland to London Heathrow Airport on time: American Airlines (83%), Alaska Airlines (83%), Aer Lingus (83%).

Question 11

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

Accepted Answer

Consider British Airways, Icelandair or Iberia when booking your flight. These represent the most popular airlines when flying from Portland to London Heathrow Airport.

Question 12

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

Accepted Answer

Departing on a Thursday is a good option for securing a great price. You can expect to save up to 63% when planning your travel around this day of the week.

Question 13

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

Accepted Answer

To save up to 31% on this flight, we recommend booking at least 30 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 Heathrow Airport from £564 1-2 weeks out and tickets from £662 for flights departing within the next 72 hours.

Question 14

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

Accepted Answer

October is one of the best times of the year to fly to London Heathrow Airport from Portland. Prices for October average £608 per person but you can even find prices for as low as £382. The most expensive prices can be found in the month of June. Opting for a October flight can save you 49% on your journey compared to booking in June

Question 15

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

Accepted Answer

One of the essential ways to save on airfare from Portland to London Heathrow Airport is to remain as flexible as possible. Flights that are at midday tend to be the most expensive. A flight in the evening could potentially save you up to 25% on airfare.

Question 16

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

Accepted Answer

Portland (PDX), located 6.0 mi from the city center, is the airport you fly out of when you book flights from Portland to London Heathrow. 4 airlines have flights from Portland to London Heathrow on a regular basis. Booking flights from Portland to London Heathrow should not be difficult; the airport handles an average of 7 outbound flights to London Heathrow per day.

Question 17

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

Accepted Answer

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

Question 18

How can I find direct flights from Portland to Heathrow?

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 Heathrow.

Question 19

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

Accepted Answer

Yes. Cheapflights offers flight deals from Portland to Heathrow 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 20

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

Accepted Answer

Cheapflights goes through 900+ travel sites to look for the best flight deals for flights from Portland to Heathrow. Too many options? Cheapflights also provides filters for things like airlines, price ranges, and number of stops to help you make a decision easily.

Question 21

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

Accepted Answer

By finding flights from multiple airlines and providers at completely no cost, Cheapflights helps millions of users like you annually find the best flights to Heathrow from Portland.

Question 22

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

Accepted Answer

Users can book flights with no change fees policies with our dedicated filters. Book flights from Portland to Heathrow flexibly with Cheapflights today.

Question 23

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

Accepted Answer

Yes, and it’s super simple to set up. Click the bell icon next to the flight deals above and provide a valid email address to enable Price Alerts. That’s it!

Round-trip from	£523
One-way from	£225
Popular in	June
Cheapest in	October
Average price	£996
Good round-trip deal	£730 or less
Good one-way deal	£441 or less

Airline	Cheapest	Average	Flexibility	On-time
Virgin Atlantic	Cheapest£426	Average£494	FlexibilityNo cancel fee	On-time72%	Search Virgin Atlantic flights
Icelandair	Cheapest£432	Average£2,372	FlexibilityNo cancel fee	On-time76%	Search Icelandair flights
Iberia	Cheapest£448	Average£547	FlexibilityNo cancel fee	On-time77%	Search Iberia flights
British Airways	Cheapest£461	Average£549	FlexibilityNo cancel fee	On-time70%	Search British Airways flights

Cheap flights from Portland to London Heathrow Airport from £225

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 22/8. 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 Heathrow are usually found in October or April, booked 55 days in advance, depart on a Friday or Tuesday and return on a Tuesday

Cheap flight deals from Portland to Heathrow

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Find flight deals from Portland to Heathrow

Cheapest flights from Portland to HeathrowExplore the most affordable flight options available from Portland to Heathrow. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 13 June 2025.

Explore the most affordable flight options available from Portland to Heathrow. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 13 June 2025.

Cheapflights Fare Finder

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

Best time to book a flight from Portland to Heathrow

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

Cheapflights Insights

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

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

Use this chart to determine the optimal time to book a return flight from Portland to Heathrow. Price data was last updated on 9 June 2025.

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

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

Find hourly flight availability from Portland to Heathrow. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 13 June 2025.

Weekly flight availability from Portland to London Heathrow Airport

Explore weekly flight availability from Portland to Heathrow. 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 13 June 2025.

Rainfall in Heathrow by month

Plan your trip to Heathrow by taking into account the average rainfall totals by month.

Temperature in Heathrow by month

Plan your trip to Heathrow by taking into account the average temperature totals by month.

Reviews of airlines servicing Heathrow

Get a feel of what it's like to fly with Delta, Alaska Airlines and KLM from Portland to London by reading reviews from past customers. You can also see how each airline stacks up 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 Heathrow. 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 Heathrow?

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

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

What are the most reliable airlines from Portland to London Heathrow Airport?

What are the cheapest flights from Portland to London Heathrow Airport?

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

How can I find direct flights from Portland to Heathrow?

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

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

Travelling to a place near Portland?

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Alternative routes for Portland to Heathrow

See prices for flight routes from nearby airports that may be better suited for you.

Top 4 airlines flying from Portland to Heathrow

Fly with Cheapflights

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 Heathrow?

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

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

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

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Cheapest flights from Portland to Heathrow
Explore the most affordable flight options available from Portland to Heathrow. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 13 June 2025.