Cheap flights from Portland to London Heathrow Airport from £247
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 21/4. Fares are subject to change and may not be available on all flights or dates of travel.
PDX — LHR
15 Jan — 22 Jan1
Return
1 adult
Economy
Return
1 adult, Economy, 0 bags
Cheapflights Tip: The best prices from Portland to London Heathrow are usually found in October or April, booked 86 days in advance, depart on a Friday or Wednesday and return on a Wednesday
Cheap flight deals from Portland to Heathrow
Enter your travel dates to find the best prices.
Cheapest flights from Portland to Heathrow
Explore the most affordable flight options available from Portland to Heathrow. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 16 December 2025.
Wed 31/1209:50PDX - LHR
1 stop18h 00mLufthansa
Fri 23/106:35LHR - PDX
2 stops19h 55mLufthansa
Deal found 14/12£499
Wed 31/1209:50PDX - LHR
1 stop18h 00mLufthansa
Wed 21/106:35LHR - PDX
2 stops19h 35mLufthansa
Deal found 14/12£506
Wed 31/1209:50PDX - LHR
2 stops16h 20mLufthansa
Wed 28/109:30LHR - PDX
2 stops21h 14mLufthansa
Deal found 14/12£514
Wed 31/1207:10PDX - LHR
1 stop14h 45mBrussels Airlines
Wed 28/110:25LHR - PDX
1 stop16h 31mBrussels Airlines
Deal found 14/12£526
Wed 31/1213:45PDX - LHR
1 stop12h 15mKLM
Wed 21/106:30LHR - PDX
1 stop12h 55mKLM
Deal found 14/12£532
Wed 31/1211:53PDX - LHR
1 stop15h 47mBritish Airways
Fri 23/113:45LHR - PDX
Nonstop10h 10mBritish Airways
Deal found 14/12£540
Tue 30/1212:54PDX - LHR
1 stop12h 46mLufthansa
Sun 8/211:10LHR - PDX
2 stops21h 29mLufthansa
Deal found 15/12£544
Tue 30/1210:03PDX - LHR
1 stop15h 57mKLM
Sun 8/206:30LHR - PDX
1 stop12h 55mKLM
Deal found 15/12£569
Mon 29/1219:00PDX - LHR
2 stops28h 10mMultiple Airlines
Sat 10/115:00LHR - PDX
2 stops26h 15mMultiple Airlines
Deal found 14/12£573
Wed 31/1217:45PDX - LHR
Nonstop9h 35mBritish Airways
Wed 21/113:45LHR - PDX
Nonstop10h 10mBritish Airways
Deal found 14/12£573
Best flights from Portland to Heathrow
Discover carefully curated flight deals from Portland to Heathrow that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 16 December 2025.
Tue 10/207:38PDX - LHR
1 stop15h 12mFinnair
Wed 25/213:45LHR - PDX
Nonstop10h 10mFinnair
Deal found 15/12£480
Sat 2/515:27PDX - LHR
2 stops34h 43mUnited Airlines
Fri 15/506:50LHR - PDX
2 stops21h 51mUnited Airlines
Deal found 14/12£482
Wed 7/107:00PDX - LHR
1 stop15h 20mDelta
Fri 16/106:30LHR - PDX
1 stop12h 55mDelta
Deal found 15/12£484
Sun 11/113:30PDX - LHR
1 stop13h 00mKLM
Wed 21/106:30LHR - PDX
1 stop12h 55mKLM
Deal found 15/12£484
Tue 14/419:05PDX - LHR
1 stop34h 15mAir Canada
Fri 1/514:05LHR - PDX
2 stops29h 30mAir Canada
Deal found 15/12£485
Thu 16/415:30PDX - LHR
1 stop12h 25mIcelandair
Mon 27/413:05LHR - PDX
1 stop12h 55mIcelandair
Deal found 15/12£486
Tue 31/319:30PDX - LHR
Nonstop9h 30mFinnair
Tue 7/415:40LHR - PDX
Nonstop10h 00mFinnair
Deal found 14/12£492
Tue 6/115:46PDX - LHR
1 stop31h 39mUnited Airlines
Wed 14/114:30LHR - PDX
1 stop32h 10mUnited Airlines
Deal found 15/12£496
Sun 1/307:00PDX - LHR
1 stop19h 15mDelta
Sun 15/306:30LHR - PDX
1 stop12h 55mDelta
Deal found 14/12£500
Tue 14/415:15PDX - LHR
1 stop14h 05mUnited Airlines
Tue 28/410:35LHR - PDX
1 stop15h 54mUnited Airlines
Deal found 15/12£499
Thu 12/317:36PDX - LHR
1 stop11h 19mDelta
Thu 19/306:30LHR - PDX
2 stops21h 29mDelta
Deal found 14/12£508
Thu 29/115:15PDX - LHR
1 stop12h 35mUnited Airlines
Thu 5/206:35LHR - PDX
2 stops19h 35mUnited Airlines
Deal found 15/12£504
Direct flights from Portland to Heathrow
Explore direct flight options from Portland to Heathrow based on user searches, and compare prices and availability for your desired travel dates. Data last updated 16 December 2025.
Mon 2/317:45PDX - LHR
Nonstop9h 35mBritish Airways
Wed 18/313:45LHR - PDX
Nonstop10h 10mBritish Airways
Deal found 14/12£470
Sun 11/117:45PDX - LHR
Nonstop9h 35mAmerican Airlines
Fri 23/113:45LHR - PDX
Nonstop10h 10mAmerican Airlines
Deal found 13/12£480
Mon 16/318:45PDX - LHR
Nonstop9h 35mBritish Airways
Thu 23/415:40LHR - PDX
Nonstop10h 00mBritish Airways
Deal found 15/12£482
Mon 16/318:45PDX - LHR
Nonstop9h 35mFinnair
Thu 23/415:40LHR - PDX
Nonstop10h 00mFinnair
Deal found 15/12£484
Mon 27/419:30PDX - LHR
Nonstop9h 30mBritish Airways
Thu 7/515:40LHR - PDX
Nonstop10h 00mBritish Airways
Deal found 14/12£492
Sun 11/117:45PDX - LHR
Nonstop9h 35mBritish Airways
Sun 18/113:45LHR - PDX
Nonstop10h 10mBritish Airways
Deal found 14/12£506
Sun 1/317:45PDX - LHR
Nonstop9h 35mFinnair
Sun 15/313:45LHR - PDX
Nonstop10h 10mFinnair
Deal found 15/12£509
Fri 27/217:45PDX - LHR
Nonstop9h 35mFinnair
Fri 6/313:45LHR - PDX
Nonstop10h 10mFinnair
Deal found 15/12£515
Sun 11/117:45PDX - LHR
Nonstop9h 35mFinnair
Wed 21/113:45LHR - PDX
Nonstop10h 10mFinnair
Deal found 14/12£517
Fri 23/117:45PDX - LHR
Nonstop9h 35mBritish Airways
Tue 5/515:40LHR - PDX
Nonstop10h 00mBritish Airways
Deal found 15/12£518
Thu 23/419:30PDX - LHR
Nonstop9h 30mFinnair
Thu 30/415:40LHR - PDX
Nonstop10h 00mFinnair
Deal found 15/12£521
Last-minute flights from Portland to Heathrow
Discover last-minute flight deals from Portland to Heathrow. Data last updated 16 December 2025 and is based on user searches.
Wed 7/107:45PDX - LHR
1 stop20h 15mLufthansa
Thu 15/107:40LHR - PDX
2 stops18h 30mLufthansa
Deal found 14/12£467
Sun 11/109:50PDX - LHR
1 stop18h 00mMultiple Airlines
Fri 23/114:30LHR - PDX
1 stop26h 45mMultiple Airlines
Deal found 13/12£463
Sun 11/115:15PDX - LHR
1 stop12h 35mMultiple Airlines
Wed 21/115:00LHR - PDX
2 stops26h 15mMultiple Airlines
Deal found 14/12£466
Sun 11/109:50PDX - LHR
1 stop18h 00mLufthansa
Sun 18/107:40LHR - PDX
2 stops18h 50mLufthansa
Deal found 14/12£471
Mon 12/107:00PDX - LHR
1 stop14h 55mLufthansa
Mon 19/119:30LHR - PDX
2 stops31h 26mLufthansa
Deal found 14/12£468
Wed 21/109:50PDX - LHR
1 stop18h 00mLufthansa
Tue 27/119:30LHR - PDX
2 stops35h 14mLufthansa
Deal found 14/12£465
Fri 23/115:15PDX - LHR
2 stops55h 55mMultiple Airlines
Tue 5/506:00LHR - PDX
2 stops21h 05mMultiple Airlines
Deal found 14/12£475
Wed 28/107:45PDX - LHR
2 stops17h 55mUnited Airlines
Wed 4/206:35LHR - PDX
2 stops19h 35mUnited Airlines
Deal found 14/12£470
Thu 29/107:00PDX - LHR
1 stop16h 55mBrussels Airlines
Thu 5/206:50LHR - PDX
2 stops20h 06mBrussels Airlines
Deal found 14/12£470
One-way flights from Portland to Heathrow
Search for one-way flight options from Portland to Heathrow. Find affordable one-way fares based on user searches. Data last updated 16 December 2025.
Mon 16/315:45PDX - LHR
1 stop20h 45mIcelandair
Deal found 15/12£247
Sun 3/514:00PDX - LHR
1 stop14h 05mWestJet
Deal found 14/12£253
Wed 6/523:40PDX - LHR
1 stop22h 50mJetBlue
Deal found 13/12£261
Mon 20/415:15PDX - LHR
1 stop14h 05mAir Canada
Deal found 14/12£283
Sun 22/319:05PDX - LHR
1 stop33h 45mMultiple Airlines
Deal found 14/12£286
Mon 16/209:50PDX - LHR
1 stop18h 00mLufthansa
Deal found 15/12£286
Wed 18/315:15PDX - LHR
1 stop13h 35mMultiple Airlines
Deal found 14/12£288
Tue 5/523:40PDX - LHR
1 stop22h 50mJetBlue
Deal found 13/12£291
Sat 25/415:30PDX - LHR
1 stop20h 50mIcelandair
Deal found 15/12£292
Tue 13/119:00PDX - LHR
1 stop32h 50mAir Canada
Deal found 15/12£295
Sat 9/515:30PDX - LHR
1 stop12h 25mIcelandair
Deal found 14/12£297
Find flight deals from Portland to Heathrow
Discover tips and strategies to find the most affordable flight options for your journey from Portland (PDX) to Heathrow (LHR). 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 16 December 2025.
Customise your flight search to find flights from Portland to Heathrow 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 16 December 2025.
Use the filters below to find and compare flights from Portland to London Heathrow Airport that are best for you.
Fly from
Portland
Fly to
Heathrow
Route
Depart
Return
Price
PortlandLondon
PDX - LHR
PDXLHR
Portland
Tue 10/2
07:38-06:50
1 stop15h 12m
London Heathrow
Wed 25/2
13:45-15:55
Nonstop10h 10m
£480
PortlandLondon
PDX - LHR
PDXLHR
Portland
Sat 2/5
15:27-10:10
2 stops34h 43m
London Heathrow
Fri 15/5
06:50-20:41
2 stops21h 51m
£482
PortlandLondon
PDX - LHR
PDXLHR
Portland
Wed 7/1
07:00-06:20
1 stop15h 20m
London Heathrow
Fri 16/1
06:30-11:25
1 stop12h 55m
£484
PortlandLondon
PDX - LHR
PDXLHR
Portland
Sun 11/1
13:30-10:30
1 stop13h 00m
London Heathrow
Wed 21/1
06:30-11:25
1 stop12h 55m
£484
PortlandLondon
PDX - LHR
PDXLHR
Portland
Tue 14/4
19:05-13:20
1 stop34h 15m
London Heathrow
Fri 1/5
14:05-11:35
2 stops29h 30m
£485
PortlandLondon
PDX - LHR
PDXLHR
Portland
Thu 16/4
15:30-11:55
1 stop12h 25m
London Heathrow
Mon 27/4
13:05-18:00
1 stop12h 55m
£486
PortlandLondon
PDX - LHR
PDXLHR
Portland
Tue 31/3
19:30-13:00
Nonstop9h 30m
London Heathrow
Tue 7/4
15:40-17:40
Nonstop10h 00m
£492
PortlandLondon
PDX - LHR
PDXLHR
Portland
Tue 6/1
15:46-07:25
1 stop31h 39m
London Heathrow
Wed 14/1
14:30-14:40
1 stop32h 10m
£496
PortlandLondon
PDX - LHR
PDXLHR
Portland
Tue 14/4
15:15-13:20
1 stop14h 05m
London Heathrow
Tue 28/4
10:35-18:29
1 stop15h 54m
£499
PortlandLondon
PDX - LHR
PDXLHR
Portland
Sun 1/3
07:00-10:15
1 stop19h 15m
London Heathrow
Sun 15/3
06:30-12:25
1 stop12h 55m
£500
Flights are sorted by cheapest return flights first.
Deals found on 15/12
Showing 1-10 of 22 results
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Best time to book a flight from Portland to Heathrow
Have a flexible travel schedule? Discover the best time to fly to Heathrow 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 Heathrow Airport
Prices
More
How far ahead should I book a flight from Portland to London Heathrow Airport?
Use this chart to determine the optimal time to book a return flight from Portland to Heathrow. Price data was last updated on 12 December 2025.
The best time to book flights from Portland to London Heathrow Airport is 86 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.
What is the cheapest month to book a flight from Portland to London Heathrow Airport?
Currently, October is the cheapest month in which you can book a flight from Portland to London Heathrow Airport (average of £393). Flying from Portland to London Heathrow Airport in June is currently the most expensive (average of £625). 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 LHR?
Find hourly flight availability from Portland to Heathrow. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 16 December 2025.
One of the essential ways to save on airfare from Portland to London Heathrow Airport is to remain as flexible as possible. Flights that are at midday tend to be the most expensive. A flight in the evening could potentially save you up to 26% on airfare.
What’s the top stopover airport for flights from Portland to London Heathrow Airport?
Share of one-stop return flights from Portland to London Heathrow Airport chosen by Cheapflights users in the past 12 months, using the same stopover each way.
Reykjavik (KEF) – chosen by Cheapflights users on 64% of one-stop itineraries from Portland to London Heathrow Airport on Cheapflights.
What’s the cheapest stopover airport for flights from Portland to London Heathrow Airport?
Average return fare for one-stop flights from Portland to London Heathrow Airport, chosen by Cheapflights users in the past 12 months, with the same stopover each way.
Seattle (SEA) is the most affordable one-stop option, with an average return flight price of £685.
What’s the fastest stopover option from Portland to London Heathrow Airport?
Shortest average travel time for one-stop one-way flights from Portland to London Heathrow Airport, 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 24m.
Which airport typically offers the quickest stopover for flights from Portland to London Heathrow Airport?
Average stopover duration for one-stop one-way flights from Portland to London Heathrow Airport, 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 02m.
Reviews of airlines servicing Heathrow
Get insights into the airlines that provide service to Heathrow. 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 Heathrow. Reviews last updated 16 December 2025.
Get a feel of what it's like to fly with Icelandair, Iberia, andBritish Airways from Portland to London Heathrow Airport by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
We paid a total of 328.00 for specific seats and we were not assigned to any of the seats for which we paid.
Related info for your journey
Find useful and relevant information for your journey from Portland to Heathrow. 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 Heathrow?
Portland (PDX), located 6.0 mi from the city center, is the airport you fly out of when you book flights from Portland to London Heathrow. 3 airlines have flights from Portland to London Heathrow on a regular basis. Booking flights from Portland to London Heathrow should not be difficult; the airport handles an average of 4 outbound flights to London Heathrow per day.
How long is the flight from Portland to London Heathrow Airport?
For as low as £480, Finnair can have you in London Heathrow Airport from Portland in 15h 12m. The distance between Portland and London Heathrow Airport is about 4896 mi. This flight may include one or multiple stops.
What are the cheapest airlines flying from Portland to London Heathrow Airport round-trip?
According to our current data, British Airways (£385), Iberia (£434), and Icelandair (£441) offers the cheapest pricing from Portland to London Heathrow Airport. These flights start at 38% lower than the current average price 3 months from now.
What are the most reliable airlines from Portland to London Heathrow Airport?
Looking for the most reliable airlines to get you to your destination on time? Our data shows these are most likely to get you from Portland to London Heathrow Airport on time: American Airlines (76%), Alaska Airlines (76%), Finnair (76%).
What are the cheapest flights from Portland to London Heathrow Airport?
On average you can expect to pay £2,284 for a flight from Portland to London Heathrow Airport. The cheapest flight overall is £1,365 while the most popular route, (Portland - London Heathrow) is currently priced at £360.
Can I find deals for business class flights from Portland to Heathrow?
Yes. Cheapflights offers flight deals from Portland to Heathrow 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 Heathrow Airport?
Currently, October is the cheapest month in which you can book a flight from Portland to London Heathrow Airport (average of £393). Flying from Portland to London Heathrow Airport in June is currently the most expensive (average of £625). 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 Heathrow departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on 16 December 2025.
Discover the top 3 airlines that operate flights from Portland to Heathrow. 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 16 December 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 Heathrow?
Cheapflights goes through 900+ travel sites to look for the best flight deals for flights from Portland to Heathrow. Too many options? Cheapflights also provides filters for things like airlines, price ranges, and number of stops to help you make a decision easily.
Why should you use Cheapflights to find cheap flight tickets from Portland to Heathrow?
By finding flights from multiple airlines and providers at completely no cost, Cheapflights helps millions of users like you annually find the best flights to Heathrow from Portland.
Can Cheapflights find flights from Portland to Heathrow with no change fees?
Users can book flights with no change fees policies with our dedicated filters. Book flights from Portland to Heathrow flexibly with Cheapflights today.
Can Cheapflights notify me if prices for flights from Portland to Heathrow become cheaper?
Yes, and it’s super simple to set up. Click the bell icon next to the flight deals above and provide a valid email address to enable Price Alerts. That’s it!
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