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Cheap flights from Portland to London from £271

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 5/5. Fares are subject to change and may not be available on all flights or dates of travel.
PDX — LON
30 Mar — 6 Apr1
1 adult

Cheapflights Tip: The best prices from Portland to London are usually found in November or January, booked 68 days in advance, depart on a Friday or Tuesday and return on a Tuesday

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 25 March 2025.

Round-trip from

£467

One-way from

£271

Popular in

June

Cheapest in

November

Average price

£577

Good round-trip deal

£475 or less

Good one-way deal

£386 or less
Icelandair
  • Icelandair
  • 7/5-11/5
  • 2 total stops
  • 28h 15m total
  • Portland to London
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5/5
  • 5/5
  • 3 total stops
  • 35h 14m total
  • Portland to London
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Highest demand for flights based on searches. 23% potential increase in price (£153 potential increase over avg. return price).
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Cheapest flight prices on average. 5% potential price decrease (£26 potential savings vs. average return price).
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Average for round-trip flights in March 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 25 March 2025.

Tue 18/1114:45PDX - LHR
1 stop12h 05mIcelandair
Tue 25/1120:40LHR - PDX
1 stop28h 20mIcelandair
Deal found 25/3£467
Wed 7/515:20PDX - LGW
1 stop15h 20mIcelandair
Sun 11/513:00LGW - PDX
1 stop12h 55mIcelandair
Deal found 25/3£467
Mon 7/405:31PDX - LHR
1 stop16h 54mIberia
Tue 22/415:40LHR - PDX
Nonstop9h 55mIberia
Deal found 24/3£471
Sun 27/418:20PDX - LGW
2 stops28h 00mMultiple Airlines
Sun 11/508:55LGW - PDX
2 stops35h 57mMultiple Airlines
Deal found 25/3£471
Mon 7/415:25PDX - LHR
1 stop13h 55mAir Canada
Tue 22/414:10LHR - PDX
1 stop27h 25mAir Canada
Deal found 24/3£475
Wed 23/405:31PDX - LGW
2 stops21h 09mAmerican Airlines
Wed 30/410:40LGW - PDX
2 stops21h 22mAmerican Airlines
Deal found 25/3£478
Wed 8/1015:25PDX - LHR
1 stop13h 55mMultiple Airlines
Wed 15/1008:40LHR - PDX
2 stops18h 06mMultiple Airlines
Deal found 24/3£480
Mon 7/419:25PDX - LHR
Nonstop9h 35mFinnair
Tue 22/415:40LHR - PDX
Nonstop9h 55mFinnair
Deal found 24/3£485
Mon 7/414:00PDX - LHR
1 stop13h 20mDelta
Tue 22/408:40LHR - PDX
1 stop34h 40mDelta
Deal found 24/3£486
Sun 28/919:25PDX - LHR
Nonstop9h 35mBritish Airways
Tue 7/1015:40LHR - PDX
Nonstop9h 55mBritish Airways
Deal found 24/3£487
Sun 27/408:45PDX - LHR
1 stop19h 35mUnited Airlines
Tue 6/506:30LHR - PDX
2 stops20h 15mUnited Airlines
Deal found 24/3£489
Mon 7/410:10PDX - LHR
2 stops17h 40mLufthansa
Tue 22/414:10LHR - PDX
1 stop12h 15mLufthansa
Deal found 24/3£493

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 25 March 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 - LGW

PDXLGW

Portland

Wed 7/5

15:20-14:40

1 stop15h 20m

London Gatwick

Sun 11/5

13:00-17:55

1 stop12h 55m

£467

PortlandLondon

PDX - LHR

PDXLHR

Portland

Thu 8/5

15:20-11:55

1 stop12h 35m

London Heathrow

Thu 15/5

13:05-17:55

1 stop12h 50m

£469

PortlandLondon

PDX - LHR

PDXLHR

Portland

Mon 7/4

15:25-13:20

1 stop13h 55m

London Heathrow

Tue 22/4

14:10-18:25

1 stop12h 15m

£471

PortlandLondon

PDX - LGW

PDXLGW

Portland

Sun 27/4

18:20-06:20

2 stops28h 00m

London Gatwick

Sun 11/5

08:55-12:52

2 stops35h 57m

£471

PortlandLondon

PDX - LHR

PDXLHR

Portland

Tue 8/4

07:35-06:25

1 stop14h 50m

London Heathrow

Wed 23/4

15:40-17:35

Nonstop9h 55m

£473

PortlandLondon

PDX - LGW

PDXLGW

Portland

Wed 23/4

05:31-10:40

2 stops21h 09m

London Gatwick

Wed 30/4

10:40-00:02

2 stops21h 22m

£478

PortlandLondon

PDX - LHR

PDXLHR

Portland

Sun 4/5

15:25-13:20

1 stop13h 55m

London Heathrow

Wed 21/5

06:00-18:45

2 stops20h 45m

£480

PortlandLondon

PDX - LHR

PDXLHR

Portland

Mon 7/4

19:25-13:00

Nonstop9h 35m

London Heathrow

Tue 22/4

15:40-17:35

Nonstop9h 55m

£485

PortlandLondon

PDX - LHR

PDXLHR

Portland

Sun 21/9

11:53-10:30

1 stop14h 37m

London Heathrow

Tue 30/9

15:30-22:58

1 stop15h 28m

£485

PortlandLondon

PDX - LHR

PDXLHR

Portland

Mon 7/4

14:00-11:20

1 stop13h 20m

London Heathrow

Tue 22/4

08:40-11:20

1 stop34h 40m

£486

Flights are sorted by cheapest return flights first.

Deals found on 24/3

Showing 1-10 of 57 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 21 March 2025.

Booking 68 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 25 March 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 afternoon, which can drop the price by up to 19% versus a flight at midday.

Rainfall in London by month

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

In terms of precipitation, rainfall in London 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 when rainfall is around 40.0 mm.

Temperature in London by month

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

If weather is an important factor for your trip to London, 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).

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 25 March 2025.
Read reviews from past customers who have flown Delta, KLM and Finnair 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.
Delta
8.0
Very Good
7,891 reviews
Check prices

Overall

8.0

Comfort

8.0

Food

7.3

Entertainment

7.9

Crew

8.5

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Delta
8.0
Very Good
7,891 reviews
Delta
8.0
Very Good
7,891 reviews
Check prices

Overall

8.0

Comfort

8.0

Food

7.3

Entertainment

7.9

Crew

8.5

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
KLM
7.8
Good
1,318 reviews
Delta
8.0
Very Good
7,891 reviews
Check prices

Overall

8.0

Comfort

8.0

Food

7.3

Entertainment

7.9

Crew

8.5

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Finnair
7.6
Good
1,266 reviews
Delta
8.0
Very Good
7,891 reviews
Check prices

Overall

8.0

Comfort

8.0

Food

7.3

Entertainment

7.9

Crew

8.5

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
SWISS
7.5
Good
1,569 reviews
Delta
8.0
Very Good
7,891 reviews
Check prices

Overall

8.0

Comfort

8.0

Food

7.3

Entertainment

7.9

Crew

8.5

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
United Airlines
7.4
Good
8,608 reviews
Delta
8.0
Very Good
7,891 reviews
Check prices

Overall

8.0

Comfort

8.0

Food

7.3

Entertainment

7.9

Crew

8.5

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

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 1 outbound flight to London per day. 5 airlines have flights to London from Portland on a regular basis.

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

    Cheapflights users have booked flights from Portland to London round-trip from £467. Other airlines that can offer you cheap pricing are Iberia, from £471, and Air Canada, from £475. Icelandair is 29% 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?

    £301 is the cheapest one-way deal found within the past few days, from WestJet. You may also be able to find cheap deals on Icelandair and Air Canada, with prices starting from £307 and £343, 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 (74%), Alaska Airlines (74%) and Aer Lingus (74%).

  • What are the cheapest flights from Portland to London?

    Looking at all options, your cheapest flight can be booked for £326. While the most popular route (Portland - London Heathrow) can be booked for £461 on average our data indicates £1,474 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

Travelling to a place near Portland?

Book flights to Portland if you plan to visit one of these locations
Hounslow
Deal
Milton Keynes
Gatwick
Croydon
Luton
Slough
Eastbourne
Wembley
Hayes
Ilford
Crawley
Southend-on-Sea
Winchester
Maidstone
Ipswich
Watford
Southall
Dartford
Folkestone

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Top 5 airlines flying from Portland to London

Discover the top 5 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 25 March 2025.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest£454Average£2,492FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
Virgin AtlanticCheapest£455Average£593FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
IberiaCheapest£471Average£696FlexibilityNo cancel feeOn-time77%
Search Iberia flights
British AirwaysCheapest£561Average£808FlexibilityNo cancel feeOn-time70%
Search British Airways flights
American AirlinesCheapest£580Average£728FlexibilityNo cancel feeOn-time71%
Search American Airlines 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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