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 24/2. Fares are subject to change and may not be available on all flights or dates of travel.
PDX — LON
29 Nov — 6 Dec1
Return
1 adult
Economy
Return
1 adult, Economy, 0 bags
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 30 October 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 30 October 2025.
Tue 4/1114:45PDX - LGW
1 stop12h 10mIcelandair
Mon 17/1111:55LGW - PDX
1 stop13h 05mIcelandair
Deal found 27/10£408
Tue 4/1114:45PDX - LHR
1 stop20h 45mIcelandair
Mon 17/1112:15LHR - PDX
1 stop12h 45mIcelandair
Deal found 27/10£411
Thu 4/1214:45PDX - STN
2 stops24h 35mMultiple Airlines
Mon 8/1208:30STN - PDX
2 stops16h 30mMultiple Airlines
Deal found 28/10£426
Thu 4/1214:45PDX - LTN
2 stops17h 15mMultiple Airlines
Mon 8/1208:50LTN - PDX
2 stops16h 10mMultiple Airlines
Deal found 28/10£435
Wed 12/1117:45PDX - LHR
Nonstop9h 35mBritish Airways
Wed 19/1113:45LHR - PDX
Nonstop10h 10mBritish Airways
Deal found 28/10£438
Mon 3/1100:40PDX - LHR
1 stop22h 25mDelta
Fri 21/1106:30LHR - PDX
1 stop12h 55mDelta
Deal found 29/10£441
Wed 31/1212:00PDX - LHR
1 stop12h 45mDelta
Fri 20/306:30LHR - PDX
1 stop12h 55mDelta
Deal found 28/10£443
Mon 3/1105:30PDX - LHR
2 stops17h 35mDelta
Fri 14/1106:30LHR - PDX
1 stop12h 55mDelta
Deal found 27/10£444
Wed 26/1109:50PDX - LHR
2 stops16h 20mMultiple Airlines
Wed 3/1206:30LHR - PDX
2 stops20h 00mMultiple Airlines
Deal found 29/10£445
Wed 3/1217:45PDX - LHR
Nonstop9h 35mBritish Airways
Wed 10/1210:05LHR - PDX
1 stop17h 05mBritish Airways
Deal found 28/10£445
Wed 5/1111:39PDX - LHR
1 stop13h 06mDelta
Thu 13/1106:20LHR - PDX
2 stops17h 46mDelta
Deal found 28/10£447
Wed 3/1207:40PDX - LHR
1 stop15h 10mFinnair
Wed 10/1210:05LHR - PDX
1 stop17h 05mFinnair
Deal found 29/10£448
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 30 October 2025.
Thu 4/1214:45PDX - LTN
2 stops17h 15mMultiple Airlines
Mon 8/1208:50LTN - PDX
2 stops16h 10mMultiple Airlines
Deal found 28/10£435
Wed 31/1212:00PDX - LHR
1 stop12h 45mDelta
Fri 20/206:30LHR - PDX
1 stop12h 55mDelta
Deal found 28/10£443
Thu 20/1114:45PDX - LGW
1 stop12h 10mIcelandair
Wed 26/1111:55LGW - PDX
1 stop13h 05mIcelandair
Deal found 29/10£451
Wed 14/117:45PDX - LHR
Nonstop9h 35mFinnair
Thu 29/112:30LHR - PDX
1 stop18h 08mFinnair
Deal found 29/10£452
Mon 9/213:02PDX - LHR
3 stops24h 33mScandinavian Airlines
Fri 20/206:40LHR - PDX
2 stops23h 42mScandinavian Airlines
Deal found 29/10£457
Wed 12/1115:15PDX - LHR
1 stop12h 35mUnited Airlines
Mon 17/1111:05LHR - PDX
2 stops41h 24mUnited Airlines
Deal found 28/10£476
Wed 26/1113:25PDX - LCY
1 stop12h 05mVirgin Atlantic
Wed 3/1210:00LCY - PDX
2 stops18h 40mVirgin Atlantic
Deal found 28/10£488
Sat 25/407:11PDX - LGW
2 stops26h 39mSWISS
Mon 4/518:35LGW - PDX
2 stops32h 11mSWISS
Deal found 27/10£492
Tue 30/1213:45PDX - LHR
1 stop12h 15mDelta
Thu 19/210:45LHR - PDX
1 stop13h 46mDelta
Deal found 28/10£453
Wed 18/210:00PDX - LHR
2 stops27h 40mScandinavian Airlines
Wed 11/307:05LHR - PDX
3 stops22h 17mScandinavian Airlines
Deal found 29/10£457
Thu 4/1214:45PDX - STN
2 stops24h 25mMultiple Airlines
Fri 12/1206:10STN - PDX
2 stops18h 50mMultiple Airlines
Deal found 29/10£464
Sat 28/315:45PDX - LGW
1 stop14h 55mIcelandair
Sun 5/415:40LGW - PDX
1 stop34h 20mIcelandair
Deal found 29/10£478
Tue 10/207:00PDX - LCY
2 stops17h 50mVirgin Atlantic
Tue 17/217:50LCY - PDX
1 stop25h 35mVirgin Atlantic
Deal found 28/10£489
Thu 23/413:00PDX - LHR
2 stops24h 40mScandinavian Airlines
Thu 30/406:40LHR - PDX
2 stops23h 42mScandinavian Airlines
Deal found 29/10£467
Wed 18/305:30PDX - LHR
2 stops20h 15mDelta
Wed 25/306:30LHR - PDX
1 stop12h 55mDelta
Deal found 29/10£471
Sat 25/415:45PDX - LGW
1 stop14h 55mIcelandair
Tue 5/515:40LGW - PDX
1 stop34h 20mIcelandair
Deal found 27/10£483
Mon 10/1114:45PDX - LGW
3 stops33h 05mMultiple Airlines
Sun 16/1108:45LGW - PDX
2 stops16h 15mMultiple Airlines
Deal found 29/10£484
Wed 22/413:00PDX - LHR
2 stops24h 40mScandinavian Airlines
Sat 9/506:40LHR - PDX
2 stops23h 42mScandinavian Airlines
Deal found 29/10£467
Wed 18/307:10PDX - LHR
2 stops18h 35mDelta
Tue 31/309:55LHR - PDX
1 stop33h 25mDelta
Deal found 29/10£471
Sat 25/413:15PDX - LCY
1 stop20h 05mVirgin Atlantic
Mon 4/520:10LCY - PDX
1 stop23h 10mVirgin Atlantic
Deal found 27/10£540
Wed 26/1109:50PDX - STN
3 stops25h 50mMultiple Airlines
Wed 3/1220:40STN - PDX
3 stops29h 50mMultiple Airlines
Deal found 28/10£498
Thu 23/413:00PDX - LHR
2 stops24h 40mScandinavian Airlines
Wed 29/407:05LHR - PDX
3 stops23h 17mScandinavian Airlines
Deal found 29/10£470
Tue 11/1100:35PDX - LHR
1 stop22h 30mDelta
Mon 17/1106:30LHR - PDX
1 stop12h 55mDelta
Deal found 28/10£479
Wed 26/1115:54PDX - LCY
2 stops17h 46mMultiple Airlines
Wed 3/1209:50LCY - PDX
2 stops21h 02mMultiple Airlines
Deal found 28/10£510
Wed 4/313:25PDX - LCY
1 stop12h 05mDelta
Thu 12/309:20LCY - PDX
1 stop34h 05mDelta
Deal found 29/10£491
Wed 18/208:30PDX - LCY
3 stops20h 25mMultiple Airlines
Wed 25/209:50LCY - PDX
2 stops21h 09mMultiple Airlines
Deal found 29/10£512
Thu 16/415:45PDX - LGW
1 stop14h 55mIcelandair
Wed 22/415:40LGW - PDX
2 stops16h 23mIcelandair
Deal found 28/10£621
Sun 1/313:25PDX - LCY
1 stop12h 05mDelta
Tue 10/310:00LCY - PDX
1 stop33h 25mDelta
Deal found 29/10£491
Thu 23/415:45PDX - LGW
1 stop14h 55mIcelandair
Wed 29/415:40LGW - PDX
2 stops16h 23mIcelandair
Deal found 28/10£621
Tue 10/208:30PDX - LCY
2 stops25h 05mMultiple Airlines
Tue 17/209:50LCY - PDX
2 stops21h 09mMultiple Airlines
Deal found 28/10£516
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 30 October 2025.
Wed 12/1117:45PDX - LHR
Nonstop9h 35mBritish Airways
Wed 19/1113:45LHR - PDX
Nonstop10h 10mBritish Airways
Deal found 28/10£438
Wed 14/117:45PDX - LHR
Nonstop9h 35mBritish Airways
Wed 21/113:45LHR - PDX
Nonstop10h 10mBritish Airways
Deal found 29/10£444
Sun 8/217:45PDX - LHR
Nonstop9h 35mBritish Airways
Wed 18/213:45LHR - PDX
Nonstop10h 10mBritish Airways
Deal found 28/10£448
Wed 14/117:45PDX - LHR
Nonstop9h 35mFinnair
Wed 21/113:45LHR - PDX
Nonstop10h 10mFinnair
Deal found 29/10£448
Wed 18/217:45PDX - LHR
Nonstop9h 35mFinnair
Wed 11/313:45LHR - PDX
Nonstop10h 10mFinnair
Deal found 27/10£459
Mon 2/317:45PDX - LHR
Nonstop9h 35mBritish Airways
Wed 18/313:45LHR - PDX
Nonstop10h 10mBritish Airways
Deal found 28/10£462
Sun 1/317:45PDX - LHR
Nonstop9h 35mBritish Airways
Wed 11/313:45LHR - PDX
Nonstop10h 10mBritish Airways
Deal found 29/10£467
Wed 12/1117:45PDX - LHR
Nonstop9h 35mBritish Airways
Mon 17/1113:45LHR - PDX
Nonstop10h 10mBritish Airways
Deal found 28/10£475
Wed 3/1217:45PDX - LHR
Nonstop9h 35mAmerican Airlines
Wed 10/1213:45LHR - PDX
Nonstop10h 10mAmerican Airlines
Deal found 29/10£480
Fri 13/217:45PDX - LHR
Nonstop9h 35mBritish Airways
Wed 25/213:45LHR - PDX
Nonstop10h 10mBritish Airways
Deal found 28/10£481
Mon 16/217:45PDX - LHR
Nonstop9h 35mBritish Airways
Sun 22/213:45LHR - PDX
Nonstop10h 10mBritish Airways
Deal found 28/10£482
Last-minute flights from Portland to London
Discover last-minute flight deals from Portland to London. Data last updated 30 October 2025 and is based on user searches.
Mon 3/1100:40PDX - LHR
1 stop22h 25mDelta
Fri 21/1106:30LHR - PDX
1 stop12h 55mDelta
Deal found 29/10£441
Mon 3/1105:30PDX - LHR
2 stops17h 35mDelta
Fri 14/1106:30LHR - PDX
1 stop12h 55mDelta
Deal found 27/10£444
Tue 4/1114:45PDX - LGW
1 stop12h 10mIcelandair
Mon 10/1111:55LGW - PDX
1 stop13h 05mIcelandair
Deal found 27/10£408
Tue 4/1114:45PDX - LHR
1 stop20h 45mIcelandair
Fri 14/1112:15LHR - PDX
1 stop12h 45mIcelandair
Deal found 28/10£411
Wed 5/1111:39PDX - LHR
1 stop13h 06mDelta
Thu 13/1106:20LHR - PDX
2 stops17h 46mDelta
Deal found 28/10£447
Wed 5/1114:10PDX - LHR
1 stop13h 30mMultiple Airlines
Thu 13/1110:45LHR - PDX
1 stop16h 50mMultiple Airlines
Deal found 28/10£453
Mon 10/1114:45PDX - LGW
1 stop12h 10mIcelandair
Sun 16/1111:55LGW - PDX
1 stop13h 05mIcelandair
Deal found 29/10£456
Wed 12/1117:45PDX - LHR
Nonstop9h 35mBritish Airways
Wed 19/1113:45LHR - PDX
Nonstop10h 10mBritish Airways
Deal found 28/10£438
Wed 12/1109:50PDX - LHR
1 stop18h 00mMultiple Airlines
Wed 19/1106:30LHR - PDX
2 stops20h 00mMultiple Airlines
Deal found 29/10£454
Thu 20/1114:45PDX - LGW
1 stop12h 10mIcelandair
Wed 26/1111:55LGW - PDX
1 stop13h 05mIcelandair
Deal found 29/10£451
Wed 26/1109:50PDX - LHR
2 stops16h 20mMultiple Airlines
Wed 3/1206:30LHR - PDX
2 stops20h 00mMultiple Airlines
Deal found 29/10£445
Wed 26/1113:45PDX - LHR
1 stop12h 15mDelta
Wed 3/1208:40LHR - PDX
2 stops20h 00mDelta
Deal found 28/10£448
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 30 October 2025.
Tue 24/209:40PDX - LGW
2 stops36h 20mMultiple Airlines
Deal found 29/10£200
Wed 25/207:00PDX - LGW
1 stop15h 00mMultiple Airlines
Deal found 28/10£201
Wed 25/221:50PDX - LHR
3 stops31h 00mMultiple Airlines
Deal found 29/10£213
Thu 4/1212:51PDX - LGW
2 stops37h 09mMultiple Airlines
Deal found 29/10£219
Fri 12/1212:55PDX - LGW
3 stops47h 45mMultiple Airlines
Deal found 28/10£225
Tue 24/220:15PDX - LHR
2 stops32h 35mMultiple Airlines
Deal found 29/10£227
Mon 23/221:50PDX - LHR
2 stops31h 00mMultiple Airlines
Deal found 29/10£228
Mon 24/1109:50PDX - LHR
3 stops19h 00mMultiple Airlines
Deal found 29/10£234
Tue 10/321:30PDX - LGW
2 stops25h 30mMultiple Airlines
Deal found 28/10£234
Fri 6/314:45PDX - LHR
3 stops38h 05mMultiple Airlines
Deal found 29/10£236
Wed 4/307:00PDX - LGW
1 stop15h 00mMultiple Airlines
Deal found 28/10£243
Thu 4/1209:50PDX - LHR
3 stops19h 00mMultiple Airlines
Deal found 29/10£244
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 30 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 - LTN
PDXLTN
Portland
Thu 4/12
14:45-16:00
2 stops17h 15m
London Luton
Mon 8/12
08:50-17:00
2 stops16h 10m
£435
PortlandLondon
PDX - LHR
PDXLHR
Portland
Wed 31/12
12:00-08:45
1 stop12h 45m
London Heathrow
Fri 20/2
06:30-11:25
1 stop12h 55m
£443
PortlandLondon
PDX - LGW
PDXLGW
Portland
Thu 20/11
14:45-10:55
1 stop12h 10m
London Gatwick
Wed 26/11
11:55-17:00
1 stop13h 05m
£451
PortlandLondon
PDX - LHR
PDXLHR
Portland
Wed 14/1
17:45-11:20
Nonstop9h 35m
London Heathrow
Thu 29/1
12:30-22:38
1 stop18h 08m
£452
PortlandLondon
PDX - LHR
PDXLHR
Portland
Tue 30/12
13:45-10:00
1 stop12h 15m
London Heathrow
Thu 19/2
10:45-16:31
1 stop13h 46m
£453
PortlandLondon
PDX - LHR
PDXLHR
Portland
Mon 9/2
13:02-21:35
3 stops24h 33m
London Heathrow
Fri 20/2
06:40-22:22
2 stops23h 42m
£457
PortlandLondon
PDX - LHR
PDXLHR
Portland
Wed 18/2
10:00-21:40
2 stops27h 40m
London Heathrow
Wed 11/3
07:05-22:22
3 stops22h 17m
£457
PortlandLondon
PDX - STN
PDXSTN
Portland
Thu 4/12
14:45-23:10
2 stops24h 25m
London Stansted
Fri 12/12
06:10-17:00
2 stops18h 50m
£464
PortlandLondon
PDX - LHR
PDXLHR
Portland
Thu 23/4
13:00-21:40
2 stops24h 40m
London Heathrow
Thu 30/4
06:40-22:22
2 stops23h 42m
£467
PortlandLondon
PDX - LHR
PDXLHR
Portland
Wed 22/4
13:00-21:40
2 stops24h 40m
London Heathrow
Sat 9/5
06:40-22:22
2 stops23h 42m
£467
Flights are sorted by cheapest return flights first.
Deals found on 29/10
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 24 October 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, October is the cheapest month in which you can book a flight from Portland to London (average of £397). Flying from Portland to London in June is currently the most expensive (average of £613). 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 30 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 27% versus a flight at midday.
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 £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 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 30 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.
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!
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!
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!
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 2 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 £452, Delta can have you in London from Portland in 9h 35m. 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 £389. Other airlines that can offer you cheap pricing are Icelandair, from £446, and Iberia, from £461. 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?
£256 is the cheapest one-way deal found within the past few days, from Icelandair. You may also be able to find cheap deals on Scandinavian Airlines and United Airlines, with prices starting from £259 and £321, 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 (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 £1,381. While the most popular route (Portland - London Heathrow) can be booked for £372 on average, our data indicates £2,310 when flying 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, October is the cheapest month in which you can book a flight from Portland to London (average of £397). Flying from Portland to London in June is currently the most expensive (average of £613). 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.
Explore flights to London departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on 30 October 2025.
Browse through other flights departing from Portland. Flights are based on user searches made on Cheapflights and were last updated on 30 October 2025.
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 30 October 2025.
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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Cheapflights and its partners wish to use cookies or similar technologies to store and/or access information on and about your device and process personal data such as your IP address, device identifiers etc., in order to improve your experience on the site, to analyse navigation, to offer and measure personalised advertising, and to facilitate sharing on social networks. We also allow the use of third-party cookies (including those from our advertising partners) on our sites.
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