How long is the flight from Portland to London?

For as low as £412, Icelandair can have you in London from Portland in 12h 10m. The distance between Portland and London is about 4921 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 £438. Another airline that can offer you cheap pricing is Iberia. British Airways is 27% cheaper than the average price of flights available within the next 90 days to this destination.

What is the cheapest day to fly from Portland to London?

Travellers seeking maximum savings on their Portland to London flight should consider departing on Friday evenings when fares are most often at their lowest. Saturday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.

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.

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).

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 cheapest flights from Portland to London?

Looking at all options, your cheapest flight can be booked for £308. While the most popular route (Portland - London Heathrow) can be booked for £368 on average our data indicates £1,345 when flying from Portland to London.

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 (80%), Alaska Airlines (80%) and Aer Lingus (80%).

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

Friday flights are found to be more expensive to fly from Portland to London. This shouldn’t discourage you from searching, as you can still find great deals by being flexible with your options. Use our search form to find deals on tickets to London.

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

To save up to 55% on this flight, we recommend booking at least 47 days prior to travel. The price may fluctuate and will likely increase closer to your departure date. Users on Cheapflights have found tickets from Portland to London from £597 1-2 weeks out and tickets from £681 for flights departing within the next 72 hours.

What is the cheapest month to fly from Portland to London?

October can be a great time to fly to London from Portland with a flight ticket averaging about £601. Cheapflights users have found deals in the month of October for as cheap as £383. The most expensive prices can be found in the month of June.

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

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.

£221+ Cheap Flights from Portland to London

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

Airfare is below average for this route at the moment. Portland to London flights typically cost between £490 and £650 in October. The cheapest return flight price found within the last 3 days was £412 on Icelandair (8 Oct-15 Oct).

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 Tuesday

Cheap flight deals from Portland to London

Round-trip from	£412
One-way from	£221
Popular in	June
Cheapest in	October
Average price	£570
Good round-trip deal	£438 or less
Good one-way deal	£354 or less

Icelandair
8/10-15/10
2 total stops
25h 25m total
Portland to London

Search Deals

12/10
1 total stop
19h 55m total
Portland to London

Search Deals

Highest demand for flights based on searches. 22% potential increase in price (£129 potential increase over avg. return price).

Search Deals

Cheapest flight prices on average. 4% potential price decrease (£21 potential savings vs. average return price).

Search Deals

Average for round-trip flights in August 2025

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

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 29 August 2025.

Wed 8/1015:20PDX - LHR

1 stop12h 35mIcelandair

Wed 15/1013:05LHR - PDX

1 stop12h 50mIcelandair

Deal found 27/8£412

Mon 29/915:20PDX - LGW

2 stops21h 35mMultiple Airlines

Tue 7/1009:40LGW - PDX

2 stops16h 15mMultiple Airlines

Deal found 27/8£412

Tue 14/1008:46PDX - LHR

1 stop13h 39mBritish Airways

Wed 5/1114:55LHR - PDX

1 stop16h 31mBritish Airways

Deal found 28/8£413

Wed 8/1015:20PDX - LGW

1 stop15h 20mIcelandair

Tue 21/1015:40LGW - PDX

1 stop34h 15mIcelandair

Deal found 28/8£413

Mon 24/1114:45PDX - LGW

1 stop12h 10mIcelandair

Wed 3/1211:55LGW - PDX

1 stop13h 05mIcelandair

Deal found 28/8£414

Wed 8/1015:20PDX - LHR

1 stop12h 35mIcelandair

Tue 14/1021:25LHR - PDX

1 stop28h 30mIcelandair

Deal found 27/8£414

Thu 6/1114:45PDX - LHR

1 stop12h 05mIcelandair

Wed 17/1212:15LHR - PDX

1 stop12h 45mIcelandair

Deal found 28/8£415

Wed 8/1015:20PDX - LGW

1 stop15h 20mIcelandair

Tue 14/1015:40LGW - PDX

1 stop34h 15mIcelandair

Deal found 27/8£415

Wed 8/1015:20PDX - LHR

1 stop12h 35mIcelandair

Thu 16/1021:25LHR - PDX

1 stop28h 30mIcelandair

Deal found 28/8£416

Thu 6/1114:45PDX - LHR

1 stop12h 05mIcelandair

Wed 12/1112:15LHR - PDX

1 stop12h 45mIcelandair

Deal found 27/8£417

Mon 29/915:20PDX - LGW

1 stop15h 15mIcelandair

Tue 7/1015:40LGW - PDX

1 stop34h 15mIcelandair

Deal found 27/8£417

Mon 29/915:20PDX - LHR

1 stop21h 00mIcelandair

Tue 7/1013:05LHR - PDX

1 stop12h 50mIcelandair

Deal found 27/8£419

Best flights from Portland to London
Discover carefully curated flight deals from Portland to London that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 29 August 2025.

Mon 29/915:20PDX - LGW

2 stops21h 35mMultiple Airlines

Tue 7/1009:40LGW - PDX

2 stops16h 15mMultiple Airlines

Deal found 27/8£412

Mon 27/1015:45PDX - LGW

1 stop12h 10mIcelandair

Mon 24/1111:55LGW - PDX

1 stop13h 05mIcelandair

Deal found 28/8£412

Fri 31/1008:46PDX - LHR

1 stop15h 04mBritish Airways

Wed 5/1110:05LHR - PDX

1 stop17h 09mBritish Airways

Deal found 28/8£451

Wed 1/1009:55PDX - LHR

2 stops15h 40mAir Canada

Wed 8/1008:40LHR - PDX

2 stops18h 06mAir Canada

Deal found 29/8£457

Mon 20/1015:50PDX - LHR

2 stops35h 20mUnited Airlines

Thu 30/1014:30LHR - PDX

1 stop25h 45mUnited Airlines

Deal found 29/8£461

Wed 22/1010:46PDX - LCY

2 stops38h 04mSWISS

Wed 29/1013:30LCY - PDX

2 stops40h 03mSWISS

Deal found 28/8£506

Mon 24/1115:54PDX - LCY

2 stops40h 46mLufthansa

Thu 4/1209:40LCY - PDX

2 stops41h 05mLufthansa

Deal found 28/8£518

Thu 6/1114:45PDX - LGW

1 stop12h 10mIcelandair

Wed 17/1211:55LGW - PDX

1 stop13h 05mIcelandair

Deal found 27/8£412

Wed 15/1015:20PDX - LGW

3 stops33h 20mMultiple Airlines

Wed 22/1008:50LGW - PDX

2 stops17h 05mMultiple Airlines

Deal found 27/8£422

Wed 8/1015:20PDX - LGW

1 stop15h 20mIcelandair

Tue 21/1015:40LGW - PDX

1 stop34h 15mIcelandair

Deal found 27/8£413

Sat 18/1015:50PDX - LHR

2 stops35h 20mUnited Airlines

Wed 29/1014:30LHR - PDX

1 stop31h 15mUnited Airlines

Deal found 29/8£461

Mon 17/1114:45PDX - LTN

1 stop15h 15mMultiple Airlines

Wed 26/1107:30LTN - PDX

1 stop17h 30mMultiple Airlines

Deal found 26/8£447

Direct flights from Portland to London
Explore direct flight options from Portland to London based on user searches, and compare prices and availability for your desired travel dates. Data last updated 29 August 2025.

Fri 17/1019:25PDX - LHR

Nonstop9h 35mBritish Airways

Tue 21/1015:40LHR - PDX

Nonstop9h 55mBritish Airways

Deal found 28/8£440

Thu 16/1019:25PDX - LHR

Nonstop9h 35mIberia

Fri 7/1113:45LHR - PDX

Nonstop10h 10mIberia

Deal found 27/8£440

Mon 6/1019:25PDX - LHR

Nonstop9h 35mBritish Airways

Wed 15/1015:40LHR - PDX

Nonstop9h 55mBritish Airways

Deal found 28/8£469

Mon 6/1019:25PDX - LHR

Nonstop9h 35mBritish Airways

Wed 22/1015:40LHR - PDX

Nonstop9h 55mBritish Airways

Deal found 28/8£470

Mon 24/1117:45PDX - LHR

Nonstop9h 35mBritish Airways

Wed 3/1213:45LHR - PDX

Nonstop10h 10mBritish Airways

Deal found 28/8£471

Sun 5/1019:25PDX - LHR

Nonstop9h 35mBritish Airways

Fri 31/1013:45LHR - PDX

Nonstop10h 10mBritish Airways

Deal found 27/8£471

Thu 16/1019:25PDX - LHR

Nonstop9h 35mBritish Airways

Mon 3/1113:45LHR - PDX

Nonstop10h 10mBritish Airways

Deal found 28/8£477

Mon 20/1019:25PDX - LHR

Nonstop9h 35mBritish Airways

Fri 31/1013:45LHR - PDX

Nonstop10h 10mBritish Airways

Deal found 28/8£486

Mon 1/1217:45PDX - LHR

Nonstop9h 35mFinnair

Mon 8/1213:45LHR - PDX

Nonstop10h 10mFinnair

Deal found 28/8£506

Mon 27/1018:45PDX - LHR

Nonstop9h 35mBritish Airways

Mon 24/1113:45LHR - PDX

Nonstop10h 10mBritish Airways

Deal found 28/8£506

Sun 12/1019:25PDX - LHR

Nonstop9h 35mBritish Airways

Mon 27/1013:45LHR - PDX

Nonstop10h 10mBritish Airways

Deal found 28/8£507

Last-minute flights from Portland to London
Discover last-minute flight deals from Portland to London. Data last updated 29 August 2025 and is based on user searches.

Fri 5/906:15PDX - LTN

2 stops25h 30mMultiple Airlines

Thu 11/921:10LTN - PDX

2 stops25h 36mMultiple Airlines

Deal found 26/8£466

Sat 6/907:19PDX - LHR

2 stops23h 16mScandinavian Airlines

Wed 10/907:05LHR - PDX

2 stops22h 16mScandinavian Airlines

Deal found 29/8£545

Mon 8/906:15PDX - LTN

3 stops25h 45mMultiple Airlines

Mon 22/921:55LTN - PDX

3 stops28h 51mMultiple Airlines

Deal found 25/8£468

Thu 11/913:08PDX - LGW

1 stop37h 47mMultiple Airlines

Sat 20/909:50LGW - PDX

1 stop34h 18mMultiple Airlines

Deal found 28/8£463

Fri 26/913:08PDX - LGW

1 stop36h 22mMultiple Airlines

Fri 3/1010:55LGW - PDX

1 stop33h 43mMultiple Airlines

Deal found 27/8£467

Fri 26/915:20PDX - LGW

1 stop15h 20mIcelandair

Tue 7/1015:40LGW - PDX

1 stop34h 15mIcelandair

Deal found 28/8£502

Mon 29/915:20PDX - LGW

2 stops21h 35mMultiple Airlines

Tue 7/1009:40LGW - PDX

2 stops16h 15mMultiple Airlines

Deal found 27/8£412

Mon 29/915:20PDX - LGW

1 stop15h 15mIcelandair

Mon 6/1015:40LGW - PDX

1 stop34h 15mIcelandair

Deal found 27/8£417

Mon 29/906:15PDX - LTN

3 stops25h 45mMultiple Airlines

Mon 6/1021:55LTN - PDX

3 stops33h 06mMultiple Airlines

Deal found 27/8£461

Mon 29/906:15PDX - LGW

3 stops30h 40mMultiple Airlines

Mon 6/1021:30LGW - PDX

3 stops33h 31mMultiple Airlines

Deal found 27/8£461

Mon 29/908:35PDX - LGW

2 stops25h 15mSWISS

Mon 6/1018:35LGW - PDX

2 stops36h 05mSWISS

Deal found 27/8£503

Tue 30/910:46PDX - LGW

2 stops23h 04mSWISS

Mon 6/1018:35LGW - PDX

2 stops36h 05mSWISS

Deal found 26/8£499

One-way flights from Portland to London
Search for one-way flight options from Portland to London. Find affordable one-way fares based on user searches. Data last updated 29 August 2025.

Sun 12/1007:00PDX - LGW

1 stop19h 55mMultiple Airlines

Deal found 27/8£221

Tue 7/1011:07PDX - LTN

3 stops27h 03mMultiple Airlines

Deal found 26/8£222

Thu 9/1020:36PDX - LTN

3 stops52h 39mMultiple Airlines

Deal found 26/8£223

Thu 16/1009:55PDX - LHR

3 stops21h 00mMultiple Airlines

Deal found 28/8£224

Wed 15/1007:20PDX - LTN

3 stops31h 15mMultiple Airlines

Deal found 27/8£226

Thu 9/1021:30PDX - LGW

1 stop29h 25mMultiple Airlines

Deal found 27/8£226

Wed 15/1020:36PDX - STN

3 stops41h 49mMultiple Airlines

Deal found 28/8£227

Tue 13/107:00PDX - LGW

1 stop15h 00mMultiple Airlines

Deal found 27/8£227

Mon 6/1013:45PDX - LHR

1 stop14h 20mWestJet

Deal found 28/8£228

Mon 6/1011:07PDX - LTN

3 stops20h 53mMultiple Airlines

Deal found 28/8£228

Mon 6/1011:07PDX - STN

3 stops20h 58mMultiple Airlines

Deal found 28/8£228

Mon 6/1011:07PDX - LGW

3 stops23h 28mMultiple Airlines

Deal found 28/8£228

Fly from

Fly to

Route

Depart

Return

Price

PortlandLondon

PDX - LGW

PDXLGW

Portland

Mon 29/9

15:20-20:55

2 stops21h 35m

London Gatwick

Tue 7/10

09:40-17:55

2 stops16h 15m

£412

PortlandLondon

PDX - LGW

PDXLGW

Portland

Mon 27/10

15:45-10:55

1 stop12h 10m

London Gatwick

Mon 24/11

11:55-17:00

1 stop13h 05m

£412

PortlandLondon

PDX - LGW

PDXLGW

Portland

Thu 6/11

14:45-10:55

1 stop12h 10m

London Gatwick

Wed 17/12

11:55-17:00

1 stop13h 05m

£412

PortlandLondon

PDX - LGW

PDXLGW

Portland

Wed 8/10

15:20-14:40

1 stop15h 20m

London Gatwick

Tue 21/10

15:40-17:55

1 stop34h 15m

£413

PortlandLondon

PDX - LGW

PDXLGW

Portland

Wed 8/10

15:20-14:40

1 stop15h 20m

London Gatwick

Tue 14/10

15:40-17:55

1 stop34h 15m

£415

PortlandLondon

PDX - LGW

PDXLGW

Portland

Thu 9/10

15:20-14:40

1 stop15h 20m

London Gatwick

Thu 16/10

15:40-17:55

1 stop34h 15m

£415

PortlandLondon

PDX - LHR

PDXLHR

Portland

Wed 15/10

15:20-20:20

1 stop21h 00m

London Heathrow

Wed 22/10

21:25-17:55

1 stop28h 30m

£416

PortlandLondon

PDX - LGW

PDXLGW

Portland

Mon 29/9

15:20-14:35

1 stop15h 15m

London Gatwick

Mon 6/10

15:40-17:55

1 stop34h 15m

£417

PortlandLondon

PDX - LGW

PDXLGW

Portland

Mon 29/9

15:20-14:35

1 stop15h 15m

London Gatwick

Tue 7/10

15:40-17:55

1 stop34h 15m

£417

PortlandLondon

PDX - LGW

PDXLGW

Portland

Wed 15/10

15:20-08:40

3 stops33h 20m

London Gatwick

Wed 22/10

08:50-17:55

2 stops17h 05m

£422

Flights are sorted by cheapest return flights first.

Deals found on 27/8

Showing 1-10 of 60 results

...

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?

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?

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

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?

Seattle (SEA) – 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?

Reykjavik (KEF) is the most affordable one-stop option, with an average return flight price of £371.

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

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?

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

Reviews of airlines servicing London

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

661 reviews

Check prices

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

661 reviews

Virgin Atlantic

7.4

Good

661 reviews

Check prices

Reviews

1 / 20

6.0

Good

Pratap,Aug 2025

JFK - LHR

Iberia

7.0

Good

2,894 reviews

Virgin Atlantic

7.4

Good

661 reviews

Check prices

Reviews

1 / 20

6.0

Good

Pratap,Aug 2025

JFK - LHR

British Airways

6.7

Okay

7,320 reviews

Virgin Atlantic

7.4

Good

661 reviews

Check prices

Reviews

1 / 20

6.0

Good

Pratap,Aug 2025

JFK - LHR

Related info for your journey

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. 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 £412, Icelandair can have you in London from Portland in 12h 10m. The distance between Portland and London is about 4921 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 £438. Another airline that can offer you cheap pricing is Iberia. British Airways is 27% 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 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 (80%), Alaska Airlines (80%) and Aer Lingus (80%).
What are the cheapest flights from Portland to London?
Looking at all options, your cheapest flight can be booked for £308. While the most popular route (Portland - London Heathrow) can be booked for £368 on average our data indicates £1,345 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 2 airlines flying from Portland to London

Airline	Cheapest	Average	Flexibility	On-time
British Airways	Cheapest£438	Average£535	FlexibilityNo cancel fee	On-time70%	Search British Airways flights
Iberia	Cheapest£451	Average£542	FlexibilityNo cancel fee	On-time77%	Search Iberia flights

Fly with Cheapflights

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.

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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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Cheap flights from Portland to London from £221

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 12/10. Fares are subject to change and may not be available on all flights or dates of travel.

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 Tuesday

Cheap flight deals from Portland to London

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Good round-trip deal

Good one-way deal

Find flight deals from Portland to London

Cheapest flights from Portland to LondonExplore 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 29 August 2025.

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 29 August 2025.

Cheapflights Fare Finder

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

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.

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 22 August 2025.

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

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 29 August 2025.

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 29 August 2025.

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.

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.

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.

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.

Reviews of airlines servicing London

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.

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?

How long is the flight from Portland to London?

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

What are the most popular routes from Portland to London?

What are the most reliable airlines from Portland to London?

What are the cheapest flights from Portland to London?

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

How can I find direct flights from Portland to London?

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

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

Travelling to a place near London?

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Alternative routes for Portland to London

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Top 2 airlines flying from Portland to London

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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 29 August 2025.