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Cheap flights from Portland to London from £180

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 18/10. Fares are subject to change and may not be available on all flights or dates of travel.
PDX — LON
1 Nov — 8 Nov1
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 Wednesday 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 2 October 2025.

Round-trip from

£413

One-way from

£180

Popular in

June

Cheapest in

October

Average price

£485

Good round-trip deal

£514 or less

Good one-way deal

£378 or less
Icelandair
  • Icelandair
  • 10/11-14/11
  • 2 total stops
  • 25h 15m total
  • Portland to London
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18/10
  • 18/10
  • 2 total stops
  • 47h 42m 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).
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Cheapest flight prices on average. 4% potential price decrease (£21 potential savings vs. average return price).
Search Deals
Average for round-trip flights in October 2025
Search Deals
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

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 2 October 2025.

Sat 8/1114:45PDX - LGW
1 stop12h 10mIcelandair
Fri 14/1111:55LGW - PDX
1 stop13h 05mIcelandair
Deal found 1/10£413
Sat 8/1114:45PDX - LHR
1 stop12h 05mIcelandair
Sun 16/1112:15LHR - PDX
1 stop12h 45mIcelandair
Deal found 1/10£416
Mon 3/1114:45PDX - LHR
1 stop20h 45mIcelandair
Sat 8/1120:35LHR - PDX
1 stop28h 25mIcelandair
Deal found 1/10£417
Tue 4/1109:50PDX - LHR
2 stops16h 20mLufthansa
Fri 21/1107:40LHR - PDX
2 stops18h 50mLufthansa
Deal found 1/10£425
Mon 3/1110:23PDX - LHR
2 stops24h 07mScandinavian Airlines
Wed 19/1106:40LHR - PDX
2 stops24h 16mScandinavian Airlines
Deal found 30/9£430
Mon 27/1015:45PDX - LHR
1 stop20h 45mIcelandair
Wed 5/1112:15LHR - PDX
1 stop12h 45mIcelandair
Deal found 1/10£431
Mon 27/1015:45PDX - LHR
1 stop20h 45mIcelandair
Thu 6/1120:35LHR - PDX
1 stop28h 25mIcelandair
Deal found 1/10£433
Tue 28/1015:45PDX - LHR
1 stop12h 05mIcelandair
Wed 5/1112:15LHR - PDX
1 stop12h 45mIcelandair
Deal found 1/10£438
Tue 28/1015:45PDX - LHR
1 stop12h 05mIcelandair
Thu 6/1120:35LHR - PDX
1 stop28h 25mIcelandair
Deal found 1/10£439
Mon 3/1115:15PDX - LHR
1 stop12h 35mMultiple Airlines
Wed 19/1109:30LHR - PDX
2 stops19h 56mMultiple Airlines
Deal found 30/9£443
Sun 9/1113:25PDX - LCY
1 stop19h 55mVirgin Atlantic
Tue 18/1117:05LCY - PDX
1 stop26h 20mVirgin Atlantic
Deal found 30/9£477
Wed 29/1014:25PDX - LCY
1 stop19h 10mVirgin Atlantic
Wed 5/1109:20LCY - PDX
2 stops20h 48mVirgin Atlantic
Deal found 30/9£484

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 2 October 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 28/10

15:45-10:50

1 stop12h 05m

London Heathrow

Wed 5/11

12:15-17:00

1 stop12h 45m

£438

PortlandLondon

PDX - LHR

PDXLHR

Portland

Wed 28/1

13:00-18:30

2 stops21h 30m

London Heathrow

Mon 2/2

10:20-22:22

2 stops20h 02m

£447

PortlandLondon

PDX - LHR

PDXLHR

Portland

Fri 30/1

07:00-09:20

2 stops18h 20m

London Heathrow

Fri 6/2

06:40-22:22

2 stops23h 42m

£448

PortlandLondon

PDX - LHR

PDXLHR

Portland

Sun 8/2

13:00-18:30

2 stops21h 30m

London Heathrow

Sat 21/2

06:40-21:35

2 stops22h 55m

£448

PortlandLondon

PDX - LHR

PDXLHR

Portland

Thu 15/1

10:00-18:30

2 stops24h 30m

London Heathrow

Fri 23/1

06:40-22:22

2 stops23h 42m

£448

PortlandLondon

PDX - LHR

PDXLHR

Portland

Mon 3/11

12:40-21:35

3 stops24h 55m

London Heathrow

Fri 14/11

06:40-22:56

2 stops24h 16m

£450

PortlandLondon

PDX - LHR

PDXLHR

Portland

Wed 18/2

07:00-16:00

2 stops25h 00m

London Heathrow

Wed 4/3

06:40-21:35

3 stops22h 55m

£453

PortlandLondon

PDX - LHR

PDXLHR

Portland

Mon 3/11

00:40-07:05

1 stop22h 25m

London Heathrow

Fri 21/11

06:30-11:25

1 stop12h 55m

£454

PortlandLondon

PDX - LHR

PDXLHR

Portland

Wed 29/10

12:06-07:05

1 stop11h 59m

London Heathrow

Wed 5/11

06:30-11:25

1 stop12h 55m

£454

PortlandLondon

PDX - LHR

PDXLHR

Portland

Sun 9/11

06:10-09:00

1 stop18h 50m

London Heathrow

Tue 18/11

20:25-11:25

1 stop23h 00m

£454

Flights are sorted by cheapest return flights first.

Deals found on 1/10

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 26 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 2 October 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 26% 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 2 October 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).

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 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 £372.

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 2 October 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
665 reviews
Check prices

Comfort

7.3

Entertainment

7.5

Overall

7.4

Boarding

7.7

Food

6.9

Crew

8.1

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
665 reviews
Virgin Atlantic
7.4
Good
665 reviews
Check prices

Comfort

7.3

Entertainment

7.5

Overall

7.4

Boarding

7.7

Food

6.9

Crew

8.1

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
2,966 reviews
Virgin Atlantic
7.4
Good
665 reviews
Check prices

Comfort

7.3

Entertainment

7.5

Overall

7.4

Boarding

7.7

Food

6.9

Crew

8.1

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
7,414 reviews
Virgin Atlantic
7.4
Good
665 reviews
Check prices

Comfort

7.3

Entertainment

7.5

Overall

7.4

Boarding

7.7

Food

6.9

Crew

8.1

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. 4 airlines have flights to London from Portland on a regular basis.

  • How long is the flight from Portland to London?

    For as low as £438, Icelandair can have you in London from Portland in 12h 05m. 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 £382. Other airlines that can offer you cheap pricing are Icelandair, from £438, and Iberia, from £452. 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?

    £260 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 Lufthansa and SWISS, with prices starting from £321 and £327, 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 £352. While the most popular route (Portland - London Heathrow) can be booked for £387 on average, our data indicates £1,359 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 4 airlines flying from Portland to London

Discover the top 4 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 2 October 2025.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest£382Average£537FlexibilityNo cancel feeOn-time70%
Search British Airways flights
IcelandairCheapest£438Average£446FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
IberiaCheapest£452Average£516FlexibilityNo cancel feeOn-time77%
Search Iberia flights
Virgin AtlanticCheapest£489Average£619FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic 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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