Cheap flights from Portland to London Heathrow Airport from £203
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 26/10. Fares are subject to change and may not be available on all flights or dates of travel.
PDX — LHR
26 Sep — 3 Oct1
Return
1 adult
Economy
Return
1 adult, Economy, 0 bags
Cheapflights Tip: The best prices from Portland to London Heathrow are usually found in January or February, booked 74 days in advance, depart on a Monday or Thursday and return on a Wednesday
Cheap flight deals from Portland to Heathrow
Enter your travel dates to find the best prices.
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One-way
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 27 August 2026.
Mon 21/915:30 -
3 stops34h 05m
Mon 28/915:35 -
3 stops34h 20m
Deal found 24/8£651
Thu 8/1015:30 -
3 stops20h 25m
Thu 15/1017:30 -
2 stops32h 25m
Deal found 24/8£653
Mon 21/915:30 -
1 stop12h 25m
Wed 30/913:05 -
1 stop12h 50m
Deal found 24/8£654
Mon 12/1015:30 -
1 stop12h 25m
Fri 23/1013:05 -
1 stop12h 50m
Deal found 24/8£655
Mon 28/915:30 -
1 stop12h 25m
Mon 12/1021:25 -
1 stop28h 30m
Deal found 24/8£656
Mon 30/1117:45 -
Nonstop9h 35m
Wed 9/1213:35 -
Nonstop10h 15m
Deal found 27/8£657
Mon 30/1119:10 -
2 stops30h 10m
Mon 7/1220:05 -
2 stops34h 37m
Deal found 27/8£657
Fri 4/919:00 -
1 stop32h 55m
Wed 9/921:25 -
1 stop22h 25m
Deal found 22/8£658
Mon 21/915:30 -
1 stop12h 25m
Mon 28/921:25 -
1 stop28h 30m
Deal found 22/8£659
Mon 28/915:30 -
1 stop20h 50m
Wed 14/1013:05 -
1 stop12h 50m
Deal found 26/8£659
Wed 25/1110:00 -
2 stops15h 20m
Thu 10/1215:00 -
2 stops28h 26m
Deal found 26/8£660
Mon 12/1015:30 -
3 stops33h 25m
Sat 24/1017:30 -
3 stops32h 30m
Deal found 25/8£661
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 27 August 2026.
Tue 2/208:46 -
2 stops18h 04m
Tue 9/206:35 -
2 stops19h 03m
Deal found 26/8£660
Sun 1/1106:50 -
1 stop20h 50m
Wed 11/1106:30 -
1 stop13h 10m
Deal found 26/8£705
Mon 21/919:30 -
Nonstop9h 30m
Wed 7/1008:55 -
1 stop18h 35m
Deal found 22/8£729
Mon 1/213:00 -
3 stops24h 35m
Wed 10/207:05 -
3 stops23h 21m
Deal found 26/8£779
Fri 2/1017:41 -
1 stop13h 24m
Sat 19/1214:45 -
1 stop16h 13m
Deal found 23/8£806
Mon 21/911:48 -
2 stops16h 07m
Mon 28/921:25 -
1 stop28h 30m
Deal found 25/8£824
Thu 1/1022:57 -
1 stop23h 28m
Thu 8/1006:30 -
1 stop12h 40m
Deal found 22/8£741
Sat 17/1012:45 -
3 stops33h 45m
Sun 25/1009:30 -
2 stops22h 14m
Deal found 22/8£759
Wed 28/1010:54 -
3 stops23h 46m
Tue 10/1106:40 -
2 stops22h 16m
Deal found 26/8£798
Fri 25/911:20 -
2 stops15h 10m
Fri 2/1009:55 -
2 stops18h 21m
Deal found 27/8£752
Tue 15/917:50 -
1 stop13h 45m
Thu 8/1006:30 -
1 stop12h 40m
Deal found 22/8£811
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 27 August 2026.
Mon 1/217:45 -
Nonstop9h 35m
Wed 10/213:35 -
Nonstop10h 15m
Deal found 23/8£650
Mon 30/1117:45 -
Nonstop9h 35m
Wed 9/1213:35 -
Nonstop10h 15m
Deal found 27/8£657
Mon 7/1217:45 -
Nonstop9h 35m
Wed 23/1213:35 -
Nonstop10h 15m
Deal found 23/8£659
Wed 25/1117:45 -
Nonstop9h 35m
Wed 9/1213:35 -
Nonstop10h 15m
Deal found 26/8£670
Mon 28/919:30 -
Nonstop9h 30m
Wed 14/1015:40 -
Nonstop10h 00m
Deal found 25/8£671
Wed 13/117:45 -
Nonstop9h 35m
Mon 18/113:35 -
Nonstop10h 15m
Deal found 26/8£686
Wed 7/1019:30 -
Nonstop9h 30m
Wed 14/1015:40 -
Nonstop10h 00m
Deal found 23/8£690
Mon 30/1117:45 -
Nonstop9h 35m
Mon 7/1213:35 -
Nonstop10h 15m
Deal found 27/8£691
Wed 4/1117:45 -
Nonstop9h 35m
Wed 11/1113:35 -
Nonstop10h 15m
Deal found 24/8£701
Wed 25/1117:45 -
Nonstop9h 35m
Mon 7/1213:35 -
Nonstop10h 15m
Deal found 26/8£707
Last-minute flights from Portland to Heathrow
Discover last-minute flight deals from Portland to Heathrow. Data last updated 27 August 2026 and is based on user searches.
Fri 4/919:00 -
1 stop32h 55m
Wed 9/921:25 -
1 stop22h 25m
Deal found 22/8£658
Mon 21/915:30 -
3 stops34h 05m
Mon 28/915:35 -
3 stops34h 20m
Deal found 24/8£651
Mon 21/915:30 -
1 stop12h 25m
Wed 30/913:05 -
1 stop12h 50m
Deal found 24/8£654
Mon 21/915:30 -
1 stop12h 25m
Mon 28/921:25 -
1 stop28h 30m
Deal found 22/8£659
Tue 22/910:10 -
2 stops17h 00m
Tue 29/921:10 -
2 stops25h 36m
Deal found 25/8£667
Wed 23/915:30 -
1 stop20h 50m
Wed 30/913:05 -
1 stop12h 50m
Deal found 25/8£665
Mon 28/915:30 -
1 stop12h 25m
Mon 12/1021:25 -
1 stop28h 30m
Deal found 24/8£656
Mon 28/915:30 -
1 stop20h 50m
Wed 14/1013:05 -
1 stop12h 50m
Deal found 26/8£659
Mon 28/919:30 -
Nonstop9h 30m
Wed 14/1015:40 -
Nonstop10h 00m
Deal found 25/8£671
Wed 30/915:30 -
1 stop20h 50m
Tue 6/1013:05 -
1 stop12h 50m
Deal found 23/8£665
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 27 August 2026.
Mon 26/1015:45 -
2 stops18h 55m
Deal found 24/8£203
Mon 5/1015:30 -
2 stops18h 10m
Deal found 25/8£203
Thu 29/1015:45 -
2 stops19h 45m
Deal found 24/8£205
Mon 19/1015:30 -
2 stops22h 10m
Deal found 23/8£214
Mon 12/1015:30 -
2 stops18h 10m
Deal found 25/8£220
Sat 24/1015:30 -
2 stops23h 10m
Deal found 25/8£222
Thu 15/1015:30 -
2 stops33h 50m
Deal found 24/8£223
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 27 August 2026.
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 7,457,451 searches. Data last updated 27 August 2026.
Use the filters below to find and compare flights from Portland to London Heathrow Airport that are best for you.
Fly from
Fly to
Route
Depart
Return
Price
Cheapest return flight
PortlandLondon
PDX Portland - LHR London Heathrow
PDXLHR
Portland
Tue 2/2
08:46-10:50
2 stops18h 04m
London Heathrow
Tue 9/2
06:35-17:38
2 stops19h 03m
£660
PortlandLondon
PDX Portland - LHR London Heathrow
PDXLHR
Portland
Sun 1/11
06:50-11:40
1 stop20h 50m
London Heathrow
Wed 11/11
06:30-11:40
1 stop13h 10m
£705
PortlandLondon
PDX Portland - LHR London Heathrow
PDXLHR
Portland
Mon 21/9
19:30-13:00
Nonstop9h 30m
London Heathrow
Wed 7/10
08:55-19:30
1 stop18h 35m
£729
PortlandLondon
PDX Portland - LHR London Heathrow
PDXLHR
Portland
Thu 1/10
22:57-06:25
1 stop23h 28m
London Heathrow
Thu 8/10
06:30-11:10
1 stop12h 40m
£741
PortlandLondon
PDX Portland - LHR London Heathrow
PDXLHR
Portland
Fri 25/9
11:20-10:30
2 stops15h 10m
London Heathrow
Fri 2/10
09:55-20:16
2 stops18h 21m
£752
PortlandLondon
PDX Portland - LHR London Heathrow
PDXLHR
Portland
Sat 17/10
12:45-06:30
3 stops33h 45m
London Heathrow
Sun 25/10
09:30-00:44
2 stops22h 14m
£759
PortlandLondon
PDX Portland - LHR London Heathrow
PDXLHR
Portland
Mon 1/2
13:00-21:35
3 stops24h 35m
London Heathrow
Wed 10/2
07:05-22:26
3 stops23h 21m
£779
PortlandLondon
PDX Portland - LHR London Heathrow
PDXLHR
Portland
Wed 28/10
10:54-17:40
3 stops23h 46m
London Heathrow
Tue 10/11
06:40-20:56
2 stops22h 16m
£798
PortlandLondon
PDX Portland - LHR London Heathrow
PDXLHR
Portland
Fri 2/10
17:41-15:05
1 stop13h 24m
London Heathrow
Sat 19/12
14:45-22:58
1 stop16h 13m
£806
Fastest return journey
PortlandLondon
PDX Portland - LHR London Heathrow
PDXLHR
Portland
Tue 15/9
17:50-15:35
1 stop13h 45m
London Heathrow
Thu 8/10
06:30-11:10
1 stop12h 40m
£811
Flights are sorted by cheapest return flights first.
Deals found on 24/8
Showing 1-10 of 22 resultsSorted by cheapest first
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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.
PDX-LHR
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
Airlines
More
How far ahead should I book a flight from Portland to London Heathrow Airport?
The best time to book flights from Portland to London Heathrow Airport is 71 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, January is the cheapest month in which you can book a flight from Portland to London Heathrow Airport (average of £507). Flying from Portland to London Heathrow Airport in June is currently the most expensive (average of £991). 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 27 August 2026.
Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Portland to London Heathrow Airport as you normally would.
How much does it cost for a return flight from Portland to London Heathrow Airport?
Airfare is typical for this route at the moment.
Portland to London Heathrow Airport flights typically cost between £585 and £811 in February.The cheapest return price found within the last 5 days was £650 on Lufthansa (1 Feb–10 Feb).
Weekly flight availability from Portland to London Heathrow Airport
Explore weekly flight availability from Portland to Heathrow. 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 27 August 2026.
The most flights from PDX to LHR are scheduled on a Tuesday (7 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (1 on average).
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.
Reykjavik (KEF) is the most affordable one-stop option, with an average return flight price of £438.
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 Reykjavik (KEF) have the shortest average one-way travel time for one-stop routes: 12h 05m.
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 Reykjavik (KEF) offer the fastest connection on this route, with an average stopover time of 1h 20m.
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 27 August 2026.
Get a feel of what it's like to fly with British 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.
Airline was good the flight attendant were very helpful and kind. The problem I had is with cheap tickets, my ticket was not allowed one check in baggage this was new to me. I do a lot of traveling overseas and 1 check in baggage is always allowed. Also I bought insurance for my ticket it proved to be useless. I have called several times and spoke to your customer service, not one single person mentioned it to me that baggage was not allowed. All this additional expense was too much for me. I even asked one of your customer service representative I need to buy extra baggage should I buy it now and he told me when you receive check in information you can buy it @ that time never mentioned it to me that my ticket didn’t include baggage. It was very frustrating. I will never use cheap ticket again.
Airline was good the flight attendant were very helpful and kind. The problem I had is with cheap tickets, my ticket was not allowed one check in baggage this was new to me. I do a lot of traveling overseas and 1 check in baggage is always allowed. Also I bought insurance for my ticket it proved to be useless. I have called several times and spoke to your customer service, not one single person mentioned it to me that baggage was not allowed. All this additional expense was too much for me. I even asked one of your customer service representative I need to buy extra baggage should I buy it now and he told me when you receive check in information you can buy it @ that time never mentioned it to me that my ticket didn’t include baggage. It was very frustrating. I will never use cheap ticket again.
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. 1 airline 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 6 outbound flights to London Heathrow per day.
How long is the flight from Portland to London Heathrow Airport?
For as low as £729, United Airlines can have you in London Heathrow Airport from Portland in 9h 30m. The distance between Portland and London Heathrow Airport is about 4896 mi. This flight may include one or multiple stops.
What is the cheapest airline to fly from Portland to London Heathrow Airport round-trip?
According to our current data, British Airways (£435), offers the cheapest pricing from Portland to London Heathrow Airport. This flight start at 37% 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 (82%), Alaska Airlines (82%), Aer Lingus (82%).
Can I find deals for flights from Portland to Heathrow that include hotel bookings?
Yes. In addition to deals on Portland to Heathrow flights, Cheapflights offers holiday packages that include both flights and hotel.
How can I find direct flights from Portland to Heathrow?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Portland to Heathrow.
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, January is the cheapest month in which you can book a flight from Portland to London Heathrow Airport (average of £507). Flying from Portland to London Heathrow Airport in June is currently the most expensive (average of £991). 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 27 August 2026.
Discover the top airline 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 7,457,451 searches. Data last updated 27 August 2026.
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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