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Cheap flights from Portland to London Heathrow Airport from £196

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 10/9. Fares are subject to change and may not be available on all flights or dates of travel.
PDX — LHR
24 Jul — 31 Jul1
1 adult
1 adult, Economy, 0 bags
Cheapflights Tip: The best prices from Portland to London Heathrow are usually found in February or January, booked 73 days in advance, depart on a Friday or Thursday and return on a Thursday

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 24 June 2026.

Sun 9/805:15
PDX
-
LHR
2 stops19h 20m
Air Canada
Tue 18/809:30
LHR
-
PDX
2 stops17h 41m
Air Canada
Deal found 20/6£699
Sun 30/819:05
PDX
-
LHR
1 stop32h 50m
Icelandair
Wed 30/913:05
LHR
-
PDX
1 stop12h 50m
Icelandair
Deal found 19/6£700
Wed 5/810:10
PDX
-
LHR
2 stops15h 50m
Air Canada
Mon 24/814:10
LHR
-
PDX
2 stops29h 18m
Air Canada
Deal found 20/6£701
Tue 1/915:30
PDX
-
LHR
1 stop20h 50m
Icelandair
Wed 30/913:05
LHR
-
PDX
1 stop12h 50m
Icelandair
Deal found 19/6£701
Wed 9/910:10
PDX
-
LHR
2 stops17h 40m
Air Canada
Wed 23/915:05
LHR
-
PDX
1 stop31h 41m
Air Canada
Deal found 20/6£702
Tue 1/915:30
PDX
-
LHR
1 stop12h 25m
Icelandair
Mon 28/921:25
LHR
-
PDX
1 stop28h 30m
Icelandair
Deal found 19/6£703
Tue 11/810:10
PDX
-
LHR
2 stops15h 50m
Air Canada
Sat 15/814:05
LHR
-
PDX
2 stops29h 23m
Air Canada
Deal found 20/6£704
Sun 16/815:30
PDX
-
LHR
2 stops34h 30m
Air Canada
Wed 26/815:05
LHR
-
PDX
1 stop12h 06m
Air Canada
Deal found 21/6£704
Tue 4/805:15
PDX
-
LHR
1 stop18h 10m
Lufthansa
Wed 19/815:05
LHR
-
PDX
1 stop12h 06m
Lufthansa
Deal found 20/6£705
Thu 24/1207:00
PDX
-
LHR
2 stops18h 20m
Air Canada
Thu 7/115:00
LHR
-
PDX
2 stops28h 53m
Air Canada
Deal found 20/6£706
Tue 11/810:10
PDX
-
LHR
2 stops17h 40m
Air Canada
Mon 17/808:30
LHR
-
PDX
2 stops22h 22m
Air Canada
Deal found 20/6£707
Fri 18/912:45
PDX
-
LHR
1 stop12h 55m
Lufthansa
Sun 27/909:30
LHR
-
PDX
2 stops17h 36m
Lufthansa
Deal found 21/6£707

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 24 June 2026.

Round-trip from

£699

One-way from

£196

Popular in

June

Cheapest in

February

Average price

£1,018
Air Canada
  • Air Canada
  • 9/8-18/8
  • 4 total stops
  • 37h 01m total
  • Portland to London
Search Deals
Virgin Atlantic
  • Virgin Atlantic
  • 10/9
  • 1 total stop
  • 13h 45m total
  • Portland to London
Search Deals
Highest demand for flights based on searches. 24% potential increase in price (£168 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease (£24 potential savings vs. average return price).
Search Deals
Average for round-trip flights in June 2026
Search Deals

Cheapflights Fare Finder

 
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 24 June 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 - LHR

PDXLHR

Portland

Sun 15/11

10:00-21:40

2 stops27h 40m

London Heathrow

Mon 7/12

07:05-22:26

3 stops23h 21m

£742

PortlandLondon

PDX - LHR

PDXLHR

Portland

Tue 8/9

07:10-07:55

1 stop16h 45m

London Heathrow

Fri 25/9

15:05-09:31

1 stop26h 26m

£743

PortlandLondon

PDX - LHR

PDXLHR

Portland

Mon 17/8

10:50-17:40

2 stops22h 50m

London Heathrow

Mon 24/8

19:50-17:14

3 stops29h 24m

£765

PortlandLondon

PDX - LHR

PDXLHR

Portland

Sat 5/9

13:42-18:30

2 stops20h 48m

London Heathrow

Sat 12/9

06:40-20:02

3 stops21h 22m

£769

PortlandLondon

PDX - LHR

PDXLHR

Portland

Fri 7/8

08:35-12:25

2 stops19h 50m

London Heathrow

Tue 11/8

11:05-20:10

2 stops41h 05m

£818

PortlandLondon

PDX - LHR

PDXLHR

Portland

Wed 16/9

07:00-09:35

2 stops18h 35m

London Heathrow

Fri 30/10

07:05-22:26

3 stops22h 21m

£821
Fastest return journey

PortlandLondon

PDX - LHR

PDXLHR

Portland

Wed 9/9

19:30-13:00

Nonstop9h 30m

London Heathrow

Thu 17/9

15:40-17:40

Nonstop10h 00m

£838

PortlandLondon

PDX - LHR

PDXLHR

Portland

Fri 31/7

22:40-20:10

1 stop13h 30m

London Heathrow

Sat 15/8

06:15-17:34

2 stops19h 19m

£859

PortlandLondon

PDX - LHR

PDXLHR

Portland

Tue 14/7

07:05-17:40

2 stops26h 35m

London Heathrow

Tue 28/7

07:05-21:13

2 stops22h 08m

£872

PortlandLondon

PDX - LHR

PDXLHR

Portland

Sat 8/8

19:30-13:00

Nonstop9h 30m

London Heathrow

Tue 18/8

14:25-23:59

1 stop17h 34m

£887

Flights are sorted by cheapest return flights first.

Deals found on 23/6

Showing 1-10 of 21 resultsSorted by cheapest first
1
2
3

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

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, February is the cheapest month in which you can book a flight from Portland to London Heathrow Airport (average of £503). Flying from Portland to London Heathrow Airport in June is currently the most expensive (average of £1,018). 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 24 June 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?

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 24 June 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.
British Airways
6.7
Okay
8,068 reviews
Check prices

Comfort

6.8

Food

6.4

Overall

6.7

Crew

7.7

Entertainment

6.4

Boarding

6.9

Reviews

1 / 20
10.0
Excellent

Anonymous,Jun 2026

IAH - LHR

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.
British Airways
6.7
Okay
8,068 reviews
British Airways
6.7
Okay
8,068 reviews
Check prices

Comfort

6.8

Food

6.4

Overall

6.7

Crew

7.7

Entertainment

6.4

Boarding

6.9

Reviews

1 / 20
10.0
Excellent

Anonymous,Jun 2026

IAH - LHR

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 7 outbound flights to London Heathrow per day.

  • How long is the flight from Portland to London Heathrow Airport?

    For as low as £743, Scandinavian Airlines can have you in London Heathrow Airport from Portland in 16h 45m. 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 (£448), offers the cheapest pricing from Portland to London Heathrow Airport. This flight start at 33% 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 (72%), Alaska Airlines (72%), Aer Lingus (72%).

  • 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, February is the cheapest month in which you can book a flight from Portland to London Heathrow Airport (average of £503). Flying from Portland to London Heathrow Airport in June is currently the most expensive (average of £1,018). 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 London Heathrow Airport?

Book flights to London Heathrow Airport if you plan to visit one of these locations
Hounslow
Milton Keynes
Wembley
Luton
Gatwick
Croydon
Ilford
Slough
Hayes
Brentford
Colchester
Northampton
Kingston upon Thames
Swindon
Eastbourne
Watford
Poole
Southall
Romford
Ipswich

Browse thousands of different options on Cheapflights for your next trip

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Top airline flying from Portland to Heathrow

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 858,174 searches. Data last updated 24 June 2026.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest£448Average£819FlexibilityNo cancel feeOn-time70%
Search British Airways 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 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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