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Cheap flights from Portland to London from £188

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 20/4. Fares are subject to change and may not be available on all flights or dates of travel.
PDX — LON
1 May — 8 May1
1 adult
1 adult, Economy, 0 bags
Cheapflights Tip: The best prices from Portland to London are usually found in October or November, booked 61 days in advance, depart on a Wednesday or Friday and return on a Wednesday

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 1 April 2026.

Fri 14/819:05
PDX
-
LHR
1 stop32h 50m
Icelandair
Fri 18/913:05
LHR
-
PDX
1 stop12h 50m
Icelandair
Deal found 28/3£547
Tue 21/415:30
PDX
-
STN
3 stops24h 20m
Multiple Airlines
Tue 5/506:30
STN
-
PDX
3 stops39h 20m
Multiple Airlines
Deal found 28/3£560
Mon 11/513:05
PDX
-
LGW
3 stops23h 30m
Multiple Airlines
Mon 18/520:50
LGW
-
PDX
2 stops22h 20m
Multiple Airlines
Deal found 27/3£565
Mon 27/415:30
PDX
-
LGW
2 stops20h 40m
Multiple Airlines
Mon 4/509:20
LGW
-
PDX
2 stops16h 40m
Multiple Airlines
Deal found 31/3£566
Tue 27/1015:45
PDX
-
LHR
1 stop20h 45m
Icelandair
Sat 7/1120:35
LHR
-
PDX
1 stop28h 25m
Icelandair
Deal found 28/3£570
Wed 30/915:30
PDX
-
LHR
1 stop12h 25m
Icelandair
Mon 5/1021:25
LHR
-
PDX
1 stop28h 30m
Icelandair
Deal found 28/3£570
Sat 19/915:30
PDX
-
LHR
1 stop12h 25m
Icelandair
Sat 31/1020:35
LHR
-
PDX
1 stop28h 25m
Icelandair
Deal found 27/3£571
Tue 11/815:30
PDX
-
LHR
1 stop12h 25m
Icelandair
Fri 11/921:25
LHR
-
PDX
1 stop22h 20m
Icelandair
Deal found 30/3£572
Tue 11/815:30
PDX
-
LHR
1 stop12h 25m
Icelandair
Tue 25/821:25
LHR
-
PDX
1 stop28h 30m
Icelandair
Deal found 27/3£573
Mon 5/1015:30
PDX
-
LHR
1 stop12h 25m
Icelandair
Mon 12/1021:25
LHR
-
PDX
1 stop28h 30m
Icelandair
Deal found 30/3£575
Wed 23/915:30
PDX
-
LHR
1 stop20h 50m
Icelandair
Fri 2/1013:05
LHR
-
PDX
1 stop12h 50m
Icelandair
Deal found 31/3£576
Mon 11/513:05
PDX
-
LHR
2 stops21h 45m
Multiple Airlines
Mon 18/519:50
LHR
-
PDX
2 stops23h 20m
Multiple Airlines
Deal found 27/3£576

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 1 April 2026.

Round-trip from

£547

One-way from

£188

Popular in

June

Cheapest in

October

Average price

£527

Good round-trip deal

£1,002 or less

Good one-way deal

£3,221 or less
Icelandair
  • Icelandair
  • 14/8-18/9
  • 2 total stops
  • 45h 40m total
  • Portland to London
Search Deals
20/4
  • 20/4
  • 2 total stops
  • 22h 55m total
  • Portland to London
Search Deals
Highest demand for flights based on searches. 22% potential increase in price (£130 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease (£18 potential savings vs. average return price).
Search Deals
Average for round-trip flights in April 2026
Search Deals
Price to beat on a round-trip flight from Portland to London (LON).
Search Deals
Price to beat on a one-way flight from Portland to London (LON).
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 1 April 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

Sat 2/5

22:55-06:25

1 stop23h 30m

London Heathrow

Tue 12/5

06:30-11:10

1 stop12h 40m

£668

PortlandLondon

PDX - LHR

PDXLHR

Portland

Tue 15/9

17:45-15:35

1 stop13h 50m

London Heathrow

Mon 21/9

20:55-11:10

1 stop22h 15m

£669

PortlandLondon

PDX - LHR

PDXLHR

Portland

Mon 17/8

17:45-15:35

1 stop13h 50m

London Heathrow

Tue 8/9

06:30-16:33

2 stops18h 03m

£676

PortlandLondon

PDX - LCY

PDXLCY

Portland

Wed 23/9

07:00-09:30

2 stops18h 30m

London City

Wed 30/9

17:50-11:10

1 stop25h 20m

£690

PortlandLondon

PDX - LCY

PDXLCY

Portland

Tue 15/9

15:43-17:25

2 stops17h 42m

London City

Tue 22/9

09:15-19:06

2 stops17h 51m

£695

PortlandLondon

PDX - LHR

PDXLHR

Portland

Thu 30/4

18:05-14:00

1 stop11h 55m

London Heathrow

Thu 7/5

20:55-11:10

1 stop22h 15m

£706

PortlandLondon

PDX - LHR

PDXLHR

Portland

Sun 26/4

06:00-07:40

2 stops17h 40m

London Heathrow

Sun 3/5

08:40-20:07

2 stops19h 27m

£721

PortlandLondon

PDX - LCY

PDXLCY

Portland

Wed 29/4

13:05-18:30

1 stop21h 25m

London City

Wed 6/5

08:25-18:52

2 stops18h 27m

£721

PortlandLondon

PDX - LCY

PDXLCY

Portland

Wed 2/9

13:14-17:25

2 stops20h 11m

London City

Wed 30/9

09:15-19:06

2 stops17h 51m

£722

PortlandLondon

PDX - LCY

PDXLCY

Portland

Thu 30/4

13:05-19:45

1 stop22h 40m

London City

Thu 7/5

17:10-11:10

1 stop26h 00m

£723

Flights are sorted by cheapest return flights first.

Deals found on 30/3

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

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 13 March 2026.

Booking 61 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, March is the cheapest month in which you can book a flight from Portland to London (average of £371). Flying from Portland to London in June is currently the most expensive (average of £645). 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 1 April 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 1 April 2026.

The most flights from PDX to LON are scheduled on a Tuesday (7 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (6 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 59% 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 £379.

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.

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 1 April 2026.
Read reviews from past customers who have flown with Virgin Atlantic and British 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
685 reviews
Check prices

Crew

8.1

Boarding

7.7

Food

6.9

Comfort

7.3

Entertainment

7.5

Overall

7.5

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
7.5
Good
685 reviews
Virgin Atlantic
7.5
Good
685 reviews
Check prices

Crew

8.1

Boarding

7.7

Food

6.9

Comfort

7.3

Entertainment

7.5

Overall

7.5

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
7,842 reviews
Virgin Atlantic
7.5
Good
685 reviews
Check prices

Crew

8.1

Boarding

7.7

Food

6.9

Comfort

7.3

Entertainment

7.5

Overall

7.5

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 6 outbound flights to London per day. 2 airlines have flights to London from Portland on a regular basis.

  • How long is the flight from Portland to London?

    For as low as £669, Delta can have you in London from Portland in 13h 50m. 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 £446. Another airline that can offer you cheap pricing is British Airways. Icelandair is 26% 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%).

  • What are the cheapest flights from Portland to London?

    Looking at all options, your cheapest flight can be booked for £642. While the most popular route (Portland - London Heathrow) can be booked for £572 on average, our data indicates £2,113 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, March is the cheapest month in which you can book a flight from Portland to London (average of £371). Flying from Portland to London in June is currently the most expensive (average of £645). 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 2 airlines flying from Portland to London

Discover the top 2 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 1 April 2026.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest£446Average£455FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
British AirwaysCheapest£449Average£547FlexibilityNo 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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