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Cheap flights from Portland to London from £187

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 25/7. Fares are subject to change and may not be available on all flights or dates of travel.
PDX — LON
9 Jul — 16 Jul1
1 adult
1 adult, Economy, 0 bags
Cheapflights Tip: The best prices from Portland to London are usually found in November or October, booked 81 days in advance, depart on a Friday or Thursday and return on a Thursday

Cheap flight deals from Portland to London

Enter your travel dates to find the best prices.

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 9 June 2026.

Sun 6/919:30
PDX
-
LHR
Nonstop9h 30m
Multiple Airlines
Mon 14/921:25
LHR
-
PDX
1 stop28h 30m
Multiple Airlines
Deal found 4/6£691
Fri 21/819:05
PDX
-
LHR
1 stop32h 50m
Icelandair
Wed 16/913:05
LHR
-
PDX
1 stop12h 50m
Icelandair
Deal found 6/6£692
Sun 4/1007:25
PDX
-
LHR
1 stop15h 25m
British Airways
Tue 6/1007:50
LHR
-
PDX
2 stops41h 36m
British Airways
Deal found 5/6£694
Fri 21/819:05
PDX
-
LGW
1 stop32h 40m
Multiple Airlines
Wed 16/914:00
LGW
-
PDX
2 stops31h 37m
Multiple Airlines
Deal found 7/6£694
Sun 11/1007:00
PDX
-
LHR
1 stop19h 20m
Delta
Sat 24/1006:30
LHR
-
PDX
1 stop12h 40m
Delta
Deal found 4/6£695
Sat 18/715:30
PDX
-
LGW
1 stop12h 15m
Icelandair
Mon 17/815:40
LGW
-
PDX
1 stop28h 05m
Icelandair
Deal found 7/6£695
Sun 2/817:50
PDX
-
LHR
1 stop13h 45m
Virgin Atlantic
Tue 18/820:55
LHR
-
PDX
1 stop22h 15m
Virgin Atlantic
Deal found 8/6£696
Sat 19/915:30
PDX
-
LGW
2 stops16h 15m
Multiple Airlines
Fri 25/913:05
LGW
-
PDX
1 stop31h 54m
Multiple Airlines
Deal found 5/6£696
Mon 2/1114:45
PDX
-
LGW
2 stops18h 10m
Multiple Airlines
Mon 9/1111:55
LGW
-
PDX
1 stop13h 05m
Multiple Airlines
Deal found 4/6£697
Tue 13/1013:05
PDX
-
LHR
1 stop11h 55m
Delta
Sun 25/1006:30
LHR
-
PDX
1 stop12h 50m
Delta
Deal found 6/6£698
Sat 1/815:30
PDX
-
LGW
1 stop12h 15m
Icelandair
Mon 17/815:40
LGW
-
PDX
1 stop28h 05m
Icelandair
Deal found 6/6£698
Tue 3/1111:55
PDX
-
LHR
2 stops17h 50m
Delta
Sun 15/1106:30
LHR
-
PDX
1 stop12h 50m
Delta
Deal found 4/6£699

Find 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 9 June 2026.

Round-trip from

£692

One-way from

£187

Popular in

July

Cheapest in

November

Average price

£802
Icelandair
  • Icelandair
  • 21/8-16/9
  • 2 total stops
  • 45h 40m total
  • Portland to London
Search Deals
25/7
  • 25/7
  • 2 total stops
  • 40h 40m total
  • Portland to London
Search Deals
Highest demand for flights based on searches. 17% potential increase in price (£100 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease (£19 potential savings vs. average return price).
Search Deals
Average for round-trip flights in June 2026
Search Deals

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 9 June 2026.
Use the filters below to find and compare flights from Portland to London that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

PortlandLondon

PDX - LHR

PDXLHR

Portland

Sun 8/11

09:40-10:30

1 stop16h 50m

London Heathrow

Sat 14/11

08:40-21:53

2 stops21h 13m

£702

PortlandLondon

PDX - LGW

PDXLGW

Portland

Sat 29/8

15:30-11:45

1 stop12h 15m

London Gatwick

Wed 2/9

15:40-11:45

1 stop28h 05m

£702

PortlandLondon

PDX - LHR

PDXLHR

Portland

Sat 5/9

22:35-20:10

1 stop13h 35m

London Heathrow

Sat 12/9

06:30-15:06

2 stops16h 36m

£702

PortlandLondon

PDX - LHR

PDXLHR

Portland

Sat 3/10

22:55-06:25

1 stop23h 30m

London Heathrow

Sat 10/10

06:30-19:58

2 stops21h 28m

£702

PortlandLondon

PDX - LHR

PDXLHR

Portland

Mon 21/9

13:35-13:45

2 stops16h 10m

London Heathrow

Mon 28/9

06:30-16:05

2 stops17h 35m

£706

PortlandLondon

PDX - LCY

PDXLCY

Portland

Mon 21/9

15:00-17:20

2 stops18h 20m

London City

Mon 5/10

19:00-11:10

1 stop24h 10m

£709

PortlandLondon

PDX - LCY

PDXLCY

Portland

Sun 13/9

17:05-17:20

2 stops16h 15m

London City

Sun 27/9

17:50-11:10

1 stop25h 20m

£717

PortlandLondon

PDX - LCY

PDXLCY

Portland

Sun 6/9

15:00-18:30

2 stops19h 30m

London City

Sun 13/9

20:45-11:10

1 stop22h 25m

£717

PortlandLondon

PDX - LCY

PDXLCY

Portland

Sat 19/9

13:05-20:15

1 stop23h 10m

London City

Wed 30/9

09:20-20:16

2 stops18h 56m

£720

PortlandLondon

PDX - LTN

PDXLTN

Portland

Sat 19/9

15:30-21:55

2 stops22h 25m

London Luton

Wed 30/9

06:15-09:31

3 stops35h 16m

£729

Flights are sorted by cheapest return flights first.

Deals found on 4/6

Showing 1-10 of 60 resultsSorted by cheapest first
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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

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

Currently, March is the cheapest month in which you can book a flight from Portland to London (average of £349). Flying from Portland to London in September is currently the most expensive (average of £982). 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 9 June 2026.

When flying from Portland to London, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

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 9 June 2026.

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).

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

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 75% 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 £375.

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 22m.

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 Seattle (SEA) offer the fastest connection on this route, with an average stopover time of 1h 01m.

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

Booking 53 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.

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 9 June 2026.
Read reviews from past customers who have flown with Virgin Atlantic,Icelandair, 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
7.5
Good
689 reviews
Check prices

Food

6.9

Crew

8.1

Entertainment

7.5

Boarding

7.7

Comfort

7.3

Overall

7.5

Reviews

1 / 20
10.0
Excellent

Edwin,May 2026

LHR - LAX

First time flying with Virgin. It was everything I hoped it would be.
Virgin Atlantic
7.5
Good
689 reviews
Virgin Atlantic
7.5
Good
689 reviews
Check prices

Food

6.9

Crew

8.1

Entertainment

7.5

Boarding

7.7

Comfort

7.3

Overall

7.5

Reviews

1 / 20
10.0
Excellent

Edwin,May 2026

LHR - LAX

First time flying with Virgin. It was everything I hoped it would be.
Icelandair
7.0
Good
670 reviews
Virgin Atlantic
7.5
Good
689 reviews
Check prices

Food

6.9

Crew

8.1

Entertainment

7.5

Boarding

7.7

Comfort

7.3

Overall

7.5

Reviews

1 / 20
10.0
Excellent

Edwin,May 2026

LHR - LAX

First time flying with Virgin. It was everything I hoped it would be.
British Airways
6.7
Okay
8,031 reviews
Virgin Atlantic
7.5
Good
689 reviews
Check prices

Food

6.9

Crew

8.1

Entertainment

7.5

Boarding

7.7

Comfort

7.3

Overall

7.5

Reviews

1 / 20
10.0
Excellent

Edwin,May 2026

LHR - LAX

First time flying with Virgin. It was everything I hoped it would be.

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. 1 airline has flights to London from Portland on a regular basis.

  • How long is the flight from Portland to London?

    For as low as £702, Delta can have you in London from Portland in 12h 15m. The distance between Portland and London is about 4921 mi. This flight may include one or multiple stops.

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

    Cheapflights users have booked flights from Portland to London round-trip from £444. British Airways is 29% cheaper than the average price of flights available within the next 90 days to this destination.

  • 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 Stansted 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 (82%), Alaska Airlines (82%) and Aer Lingus (82%).

  • 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, March is the cheapest month in which you can book a flight from Portland to London (average of £349). Flying from Portland to London in September is currently the most expensive (average of £982). 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 airline flying from Portland to London

Discover the top airline 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 9 June 2026.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest£444Average£806FlexibilityNo cancel feeOn-time70%
Search British Airways flights

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 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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