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Cheap flights from Portland to London from £263

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 26/10. Fares are subject to change and may not be available on all flights or dates of travel.
PDX — LON
18 Oct — 25 Oct1
1 adult
1 adult, Economy

Cheapflights Tip: The best prices from Portland to London are usually found in October or November, booked 46 days in advance, depart on a Friday or Tuesday and return on a Wednesday

Cheap flight deals from Portland to London

Discover tips and strategies to find the most affordable flight options for your journey from Portland (PDX) to London (LON). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated 18 September 2025.

Round-trip from

£399

One-way from

£263

Popular in

June

Cheapest in

October

Average price

£533

Good round-trip deal

£400 or less

Good one-way deal

£373 or less
KLM
  • KLM
  • 22/10-31/10
  • 2 total stops
  • 25h 20m total
  • Portland to London
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Scandinavian Airlines
  • Scandinavian Airlines
  • 26/10
  • 2 total stops
  • 26h 15m total
  • Portland to London
Search Deals
Highest demand for flights based on searches. 22% potential increase in price (£128 potential increase over avg. return price).
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Cheapest flight prices on average. 4% potential price decrease (£20 potential savings vs. average return price).
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Average for round-trip flights in September 2025
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Price to beat on a round-trip flight from Portland to London (LON).
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Price to beat on a one-way flight from Portland to London (LON).
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Find flight deals from Portland to London

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 18 September 2025.

Wed 22/1013:30PDX - LHR
1 stop13h 50mDelta
Wed 29/1006:30LHR - PDX
1 stop12h 55mDelta
Deal found 16/9£399
Fri 17/1006:15PDX - LTN
3 stops23h 20mMultiple Airlines
Thu 23/1021:10LTN - PDX
2 stops25h 36mMultiple Airlines
Deal found 16/9£400
Wed 15/1012:53PDX - LHR
1 stop15h 27mUnited Airlines
Wed 22/1010:50LHR - PDX
2 stops19h 55mUnited Airlines
Deal found 16/9£400
Fri 17/1006:15PDX - STN
3 stops24h 05mMultiple Airlines
Thu 23/1022:55STN - PDX
2 stops23h 51mMultiple Airlines
Deal found 16/9£400
Wed 15/1019:25PDX - LHR
Nonstop9h 35mBritish Airways
Tue 21/1015:40LHR - PDX
Nonstop9h 55mBritish Airways
Deal found 16/9£401
Tue 11/1109:50PDX - LHR
2 stops16h 20mAir Canada
Tue 9/1215:00LHR - PDX
2 stops26h 15mAir Canada
Deal found 18/9£402
Mon 17/1114:45PDX - LGW
1 stop12h 10mIcelandair
Mon 1/1211:55LGW - PDX
1 stop13h 05mIcelandair
Deal found 16/9£402
Fri 17/1015:25PDX - LHR
1 stop13h 55mLufthansa
Sun 19/1006:30LHR - PDX
2 stops20h 16mLufthansa
Deal found 15/9£402
Sun 5/1019:25PDX - LHR
Nonstop9h 35mAmerican Airlines
Tue 21/1015:40LHR - PDX
Nonstop9h 55mAmerican Airlines
Deal found 18/9£403
Fri 17/1006:15PDX - LGW
3 stops28h 40mMultiple Airlines
Thu 23/1021:30LGW - PDX
2 stops25h 16mMultiple Airlines
Deal found 16/9£403
Wed 8/1005:30PDX - LHR
2 stops21h 40mUnited Airlines
Wed 22/1014:10LHR - PDX
1 stop27h 10mUnited Airlines
Deal found 17/9£404
Wed 1/1005:30PDX - LHR
2 stops21h 40mUnited Airlines
Wed 8/1014:10LHR - PDX
1 stop12h 36mUnited Airlines
Deal found 18/9£404

Cheapflights Fare Finder

 
Customise your flight search to find flights from Portland to London that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 858,174 searches. Data last updated 18 September 2025.
Use the filters below to find and compare flights from Portland to London that are best for you.

Fly from

Portland

Fly to

London

Route

Depart

Return

Price

PortlandLondon

PDX - LHR

PDXLHR

Portland

Tue 14/10

15:50-11:10

2 stops35h 20m

London Heathrow

Tue 4/11

14:30-14:45

1 stop32h 15m

£399

PortlandLondon

PDX - LHR

PDXLHR

Portland

Sun 5/10

13:40-14:15

1 stop16h 35m

London Heathrow

Tue 14/10

19:15-11:20

1 stop24h 05m

£399

PortlandLondon

PDX - LHR

PDXLHR

Portland

Mon 6/10

15:50-11:10

2 stops35h 20m

London Heathrow

Wed 22/10

14:10-09:20

1 stop27h 10m

£399

PortlandLondon

PDX - LTN

PDXLTN

Portland

Fri 17/10

06:15-13:35

3 stops23h 20m

London Luton

Thu 23/10

21:10-14:46

2 stops25h 36m

£400

PortlandLondon

PDX - LHR

PDXLHR

Portland

Tue 14/10

19:25-13:00

Nonstop9h 35m

London Heathrow

Thu 23/10

15:40-17:35

Nonstop9h 55m

£401

PortlandLondon

PDX - LHR

PDXLHR

Portland

Mon 3/11

17:45-11:20

Nonstop9h 35m

London Heathrow

Wed 19/11

13:45-15:55

Nonstop10h 10m

£401

PortlandLondon

PDX - LHR

PDXLHR

Portland

Mon 6/10

11:10-11:20

1 stop16h 10m

London Heathrow

Wed 22/10

06:15-16:45

2 stops18h 30m

£406

PortlandLondon

PDX - LTN

PDXLTN

Portland

Tue 14/10

09:55-12:35

2 stops18h 40m

London Luton

Tue 21/10

21:50-18:46

2 stops28h 56m

£409

PortlandLondon

PDX - LTN

PDXLTN

Portland

Mon 10/11

14:45-14:00

1 stop15h 15m

London Luton

Mon 24/11

08:00-17:00

1 stop17h 00m

£410

PortlandLondon

PDX - LHR

PDXLHR

Portland

Sun 12/10

15:19-11:20

1 stop12h 01m

London Heathrow

Thu 23/10

17:25-22:40

1 stop13h 15m

£412

Flights are sorted by cheapest return flights first.

Deals found on 15/9

Showing 1-10 of 60 results
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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.
Estimated return price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

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 12 September 2025.

Booking 46 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.

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

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.

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 18 September 2025.

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.

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 18 September 2025.

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).

What’s the top stopover airport for flights from Portland to London?

Share of one-stop return flights from Portland to London chosen by Cheapflights users in the past 12 months, using the same stopover each way.

Reykjavik (KEF) – chosen by Cheapflights users on 44% of one-stop itineraries from Portland to London on Cheapflights.

What’s the cheapest stopover airport for flights from Portland to London?

Average return fare for one-stop flights from Portland to London, chosen by Cheapflights users in the past 12 months, with the same stopover each way.

Reykjavik (KEF) is the most affordable one-stop option, with an average return flight price of £367.

What’s the fastest stopover option from Portland to London?

Shortest average travel time for one-stop one-way flights from Portland to London, based on itineraries clicked by Cheapflights users over the past 12 months, grouped by stopover airport.

Flights via Seattle (SEA) have the shortest average one-way travel time for one-stop routes: 11h 44m.

Which airport typically offers the quickest stopover for flights from Portland to London?

Average stopover duration for one-stop one-way flights from Portland to London, chosen by Cheapflights users in the last 12 months, grouped by stopover airport.

Flights via Reykjavik (KEF) offer the fastest connection on this route, with an average stopover time of 1h 28m.

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 18 September 2025.
Read reviews from past customers who have flown with Virgin Atlantic, Iberia, andBritish Airways 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.
Virgin Atlantic
7.4
Good
664 reviews
Check prices

Comfort

7.3

Boarding

7.7

Food

6.9

Crew

8.1

Entertainment

7.5

Overall

7.4

Reviews

1 / 20
6.0
Good

Pratap,Aug 2025

JFK - LHR

The flight is clean, food good and the staff are excellent! Very professional, polite and accommodating. The seat itself is really mediocre. Can’t believe there is not inch of storage space. Believe it or not it there is not place even to put away your phone or pen!! Very very surprising and terribly inconvenient. No coat hanger hook either. Had to give it away. ALL IN ALL VERY INCONVENIENT business class seat compared to their peers. What is even more surprising is that this on their relatively new fleet of Airbus A350-1000. I was having com platelets different expectations of Virgin and this has disappointed me. Everything else is just as good and as you would expect from Virgin!
Virgin Atlantic
7.4
Good
664 reviews
Virgin Atlantic
7.4
Good
664 reviews
Check prices

Comfort

7.3

Boarding

7.7

Food

6.9

Crew

8.1

Entertainment

7.5

Overall

7.4

Reviews

1 / 20
6.0
Good

Pratap,Aug 2025

JFK - LHR

The flight is clean, food good and the staff are excellent! Very professional, polite and accommodating. The seat itself is really mediocre. Can’t believe there is not inch of storage space. Believe it or not it there is not place even to put away your phone or pen!! Very very surprising and terribly inconvenient. No coat hanger hook either. Had to give it away. ALL IN ALL VERY INCONVENIENT business class seat compared to their peers. What is even more surprising is that this on their relatively new fleet of Airbus A350-1000. I was having com platelets different expectations of Virgin and this has disappointed me. Everything else is just as good and as you would expect from Virgin!
Iberia
7.0
Good
2,925 reviews
Virgin Atlantic
7.4
Good
664 reviews
Check prices

Comfort

7.3

Boarding

7.7

Food

6.9

Crew

8.1

Entertainment

7.5

Overall

7.4

Reviews

1 / 20
6.0
Good

Pratap,Aug 2025

JFK - LHR

The flight is clean, food good and the staff are excellent! Very professional, polite and accommodating. The seat itself is really mediocre. Can’t believe there is not inch of storage space. Believe it or not it there is not place even to put away your phone or pen!! Very very surprising and terribly inconvenient. No coat hanger hook either. Had to give it away. ALL IN ALL VERY INCONVENIENT business class seat compared to their peers. What is even more surprising is that this on their relatively new fleet of Airbus A350-1000. I was having com platelets different expectations of Virgin and this has disappointed me. Everything else is just as good and as you would expect from Virgin!
British Airways
6.7
Okay
7,367 reviews
Virgin Atlantic
7.4
Good
664 reviews
Check prices

Comfort

7.3

Boarding

7.7

Food

6.9

Crew

8.1

Entertainment

7.5

Overall

7.4

Reviews

1 / 20
6.0
Good

Pratap,Aug 2025

JFK - LHR

The flight is clean, food good and the staff are excellent! Very professional, polite and accommodating. The seat itself is really mediocre. Can’t believe there is not inch of storage space. Believe it or not it there is not place even to put away your phone or pen!! Very very surprising and terribly inconvenient. No coat hanger hook either. Had to give it away. ALL IN ALL VERY INCONVENIENT business class seat compared to their peers. What is even more surprising is that this on their relatively new fleet of Airbus A350-1000. I was having com platelets different expectations of Virgin and this has disappointed me. Everything else is just as good and as you would expect from Virgin!

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?

    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.

  • How long is the flight from Portland to London?

    For as low as £401, United Airlines can have you in London from Portland in 9h 35m. The distance between Portland and London is about 4896 mi. This flight may include one or multiple stops.

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

    Cheapflights users have booked flights from Portland to London round-trip from £377. Other airlines that can offer you cheap pricing are Icelandair, from £432, and Iberia, from £446. British Airways is 36% cheaper than the average price of flights available within the next 90 days to this destination.

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

    £263 is the cheapest one-way deal found within the past few days, from Scandinavian Airlines. You may also be able to find cheap deals on Air Canada and United Airlines, with prices starting from £289 and £317, respectively.

  • What are the most popular routes from Portland to London?

    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.

  • What are the most reliable airlines from Portland to London?

    The top 3 most reliable airlines when flying from Portland to London are American Airlines (77%), Alaska Airlines (77%) and Aer Lingus (77%).

  • What are the cheapest flights from Portland to London?

    Looking at all options, your cheapest flight can be booked for £373. While the most popular route (Portland - London Heathrow) can be booked for £350 on average, our data indicates £1,342 when flying from Portland to London.

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

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

  • How can I find direct flights from Portland to London?

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

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

    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.

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

    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.

See more FAQs

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Top 3 airlines flying from Portland to London

Discover the top 3 airlines that operate flights from Portland to London. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 858,174 searches. Data last updated 18 September 2025.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest£377Average£530FlexibilityNo cancel feeOn-time70%
Search British Airways flights
IcelandairCheapest£432Average£440FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
IberiaCheapest£446Average£537FlexibilityNo cancel feeOn-time77%
Search Iberia flights

Fly with Cheapflights

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

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.

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

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.

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

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.

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

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.

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