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Cheap flights from Portland to London Heathrow Airport from £216

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 3/11. Fares are subject to change and may not be available on all flights or dates of travel.
PDX — LHR
4 Aug — 11 Aug1
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 74 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 5 July 2026.

Sun 4/1019:30
PDX
-
LHR
Nonstop9h 30m
British Airways
Tue 13/1015:40
LHR
-
PDX
Nonstop10h 00m
British Airways
Deal found 30/6£683
Sun 4/1019:30
PDX
-
LHR
Nonstop9h 30m
British Airways
Wed 21/1015:40
LHR
-
PDX
Nonstop10h 00m
British Airways
Deal found 1/7£683
Fri 28/810:10
PDX
-
LHR
2 stops15h 50m
Air Canada
Sun 6/909:30
LHR
-
PDX
2 stops17h 41m
Air Canada
Deal found 1/7£684
Tue 10/1114:45
PDX
-
LHR
2 stops17h 40m
Multiple Airlines
Mon 16/1112:15
LHR
-
PDX
1 stop12h 45m
Multiple Airlines
Deal found 30/6£685
Wed 19/819:05
PDX
-
LHR
1 stop32h 50m
Multiple Airlines
Wed 26/810:20
LHR
-
PDX
2 stops33h 15m
Multiple Airlines
Deal found 2/7£686
Wed 26/819:05
PDX
-
LHR
1 stop17h 15m
Icelandair
Thu 10/921:25
LHR
-
PDX
1 stop28h 30m
Icelandair
Deal found 1/7£686
Sat 3/1015:30
PDX
-
LHR
1 stop12h 25m
Icelandair
Sat 10/1021:25
LHR
-
PDX
1 stop28h 30m
Icelandair
Deal found 29/6£687
Sat 17/1019:45
PDX
-
LHR
1 stop33h 35m
Multiple Airlines
Sun 25/1007:40
LHR
-
PDX
2 stops17h 51m
Multiple Airlines
Deal found 30/6£688
Mon 17/819:45
PDX
-
LHR
2 stops26h 45m
Multiple Airlines
Fri 28/808:40
LHR
-
PDX
1 stop21h 49m
Multiple Airlines
Deal found 1/7£689
Wed 12/815:43
PDX
-
LHR
2 stops18h 07m
SWISS
Mon 24/813:50
LHR
-
PDX
2 stops41h 02m
SWISS
Deal found 2/7£689
Thu 27/823:17
PDX
-
LHR
1 stop14h 08m
United Airlines
Wed 9/914:50
LHR
-
PDX
1 stop14h 15m
United Airlines
Deal found 1/7£690
Sun 27/922:57
PDX
-
LHR
1 stop23h 28m
Delta
Mon 12/1006:30
LHR
-
PDX
1 stop12h 40m
Delta
Deal found 30/6£691

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 5 July 2026.

Round-trip from

£683

One-way from

£216

Popular in

June

Cheapest in

February

Average price

£990

Good round-trip deal

£786 or less
British Airways
  • British Airways
  • 4/10-13/10
  • Nonstop
  • 19h 30m total
  • Portland to London
Search Deals
3/11
  • 3/11
  • 2 total stops
  • 17h 40m total
  • Portland to London
Search Deals
Highest demand for flights based on searches. 24% potential increase in price (£166 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease (£23 potential savings vs. average return price).
Search Deals
Average for round-trip flights in July 2026
Search Deals
Price to beat on a round-trip flight from Portland to London Heathrow.
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 5 July 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
Fastest return journey

PortlandLondon

PDX - LHR

PDXLHR

Portland

Mon 31/8

16:07-12:25

1 stop12h 18m

London Heathrow

Thu 10/9

14:50-21:05

1 stop14h 15m

£690

PortlandLondon

PDX - LHR

PDXLHR

Portland

Sat 3/10

12:45-20:10

1 stop23h 25m

London Heathrow

Sat 10/10

11:45-20:00

2 stops16h 15m

£698

PortlandLondon

PDX - LHR

PDXLHR

Portland

Wed 16/9

12:40-15:35

1 stop18h 55m

London Heathrow

Tue 22/9

11:45-23:54

2 stops20h 09m

£722

PortlandLondon

PDX - LHR

PDXLHR

Portland

Tue 20/10

07:00-18:50

2 stops27h 50m

London Heathrow

Tue 3/11

06:40-21:27

3 stops22h 47m

£724

PortlandLondon

PDX - LHR

PDXLHR

Portland

Fri 18/9

07:00-08:50

1 stop17h 50m

London Heathrow

Mon 28/9

20:55-11:10

1 stop22h 15m

£753

PortlandLondon

PDX - LHR

PDXLHR

Portland

Sun 23/8

09:45-13:45

2 stops20h 00m

London Heathrow

Sat 29/8

11:45-11:10

1 stop31h 25m

£754

PortlandLondon

PDX - LHR

PDXLHR

Portland

Fri 14/8

08:40-12:25

1 stop19h 45m

London Heathrow

Fri 21/8

06:50-20:10

2 stops21h 20m

£758

PortlandLondon

PDX - LHR

PDXLHR

Portland

Sat 3/10

12:40-17:40

2 stops21h 00m

London Heathrow

Sat 10/10

06:40-20:00

3 stops21h 20m

£758

PortlandLondon

PDX - LHR

PDXLHR

Portland

Sat 22/8

23:02-06:45

1 stop23h 43m

London Heathrow

Sat 29/8

11:05-20:10

2 stops41h 05m

£767

PortlandLondon

PDX - LHR

PDXLHR

Portland

Sat 5/9

21:32-15:05

1 stop33h 33m

London Heathrow

Sat 12/9

17:00-22:01

1 stop13h 01m

£784

Flights are sorted by cheapest return flights first.

Deals found on 1/7

Showing 1-10 of 22 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 £506). Flying from Portland to London Heathrow Airport in June is currently the most expensive (average of £1,007). 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 5 July 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 5 July 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
8,095 reviews
Check prices

Boarding

6.9

Comfort

6.8

Entertainment

6.4

Overall

6.7

Crew

7.7

Food

6.4

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
8,095 reviews
British Airways
6.7
Okay
8,095 reviews
Check prices

Boarding

6.9

Comfort

6.8

Entertainment

6.4

Overall

6.7

Crew

7.7

Food

6.4

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 £690, United Airlines can have you in London Heathrow Airport from Portland in 12h 18m. 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 (£443), offers the cheapest pricing from Portland to London Heathrow Airport. This flight start at 34% 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 (68%), Alaska Airlines (68%), Aer Lingus (68%).

  • What are the cheapest flights from Portland to London Heathrow Airport?

    On average you can expect to pay £869 for a flight from Portland to London Heathrow Airport. The cheapest flight overall is £843 while the most popular route, (Portland - London Heathrow) is currently priced at £492.

  • 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 £506). Flying from Portland to London Heathrow Airport in June is currently the most expensive (average of £1,007). 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
Luton
Wembley
Gatwick
Croydon
Slough
Ilford
Hayes
Brentford
Colchester
Northampton
Watford
Kingston upon Thames
Swindon
Eastbourne
Poole
Southall
Aylesbury
Romford

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 5 July 2026.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest£443Average£810FlexibilityNo 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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