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Cheap flights from Portland to London Heathrow Airport from £226

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 9/11. Fares are subject to change and may not be available on all flights or dates of travel.
PDX — LHR
14 Sep — 21 Sep1
1 adult
1 adult, Economy, 0 bags
Cheapflights Tip: The best prices from Portland to London Heathrow are usually found in January or February, booked 14 days in advance, depart on a Tuesday or Monday 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 15 August 2026.

Wed 11/1115:40 -
2 stops18h 10m
Tue 17/1120:05 -
2 stops32h 57m
Deal found 13/8£663
Sun 6/1213:50 -
1 stop14h 30m
Wed 23/1214:45 -
1 stop16h 13m
Deal found 13/8£665
Wed 9/919:00 -
1 stop17h 20m
Wed 23/913:05 -
1 stop12h 50m
Deal found 14/8£668
Wed 30/915:30 -
1 stop20h 50m
Fri 9/1013:05 -
1 stop12h 50m
Deal found 13/8£668
Mon 30/1107:00 -
1 stop17h 15m
Wed 9/1213:35 -
Nonstop10h 15m
Deal found 11/8£670
Wed 30/915:30 -
1 stop20h 50m
Mon 12/1021:25 -
1 stop28h 30m
Deal found 13/8£671
Wed 14/1015:30 -
1 stop12h 25m
Mon 2/1112:15 -
1 stop12h 45m
Deal found 14/8£671
Mon 14/1214:45 -
1 stop12h 05m
Wed 23/1212:15 -
1 stop12h 45m
Deal found 14/8£672
Tue 15/1214:45 -
1 stop12h 05m
Wed 23/1212:15 -
1 stop12h 45m
Deal found 14/8£673
Sun 6/1217:45 -
Nonstop9h 35m
Fri 25/1213:35 -
Nonstop10h 15m
Deal found 13/8£674
Wed 2/1217:45 -
Nonstop9h 35m
Tue 8/1213:50 -
1 stop16h 08m
Deal found 14/8£674
Wed 18/1117:45 -
Nonstop9h 35m
Mon 23/1112:15 -
1 stop12h 45m
Deal found 11/8£675

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 15 August 2026.

Round-trip from

£660

One-way from

£226

Popular in

June

Cheapest in

January

Average price

£750
Lufthansa
  • Lufthansa
  • 20/1-24/2
  • 4 total stops
  • 38h 37m total
  • Portland to London
Search Deals
Icelandair
  • Icelandair
  • 10/2
  • 1 total stop
  • 12h 05m total
  • Portland to London
Search Deals
Highest demand for flights based on searches. 21% potential increase in price (£139 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease (£21 potential savings vs. average return price).
Search Deals
Average for round-trip flights in August 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 15 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

Wed 9/9

11:20-11:20

1 stop16h 00m

London Heathrow

Wed 16/9

06:30-11:10

1 stop12h 40m

£708

PortlandLondon

PDX Portland - LHR London Heathrow

PDXLHR

Portland

Sun 1/11

23:00-06:25

1 stop23h 25m

London Heathrow

Wed 11/11

06:30-11:20

1 stop12h 50m

£708

PortlandLondon

PDX Portland - LHR London Heathrow

PDXLHR

Portland

Wed 30/9

12:34-11:20

1 stop14h 46m

London Heathrow

Tue 13/10

06:30-11:10

1 stop12h 40m

£708

PortlandLondon

PDX Portland - LHR London Heathrow

PDXLHR

Portland

Tue 15/9

11:20-10:30

2 stops15h 10m

London Heathrow

Tue 22/9

06:30-11:10

1 stop12h 40m

£711

PortlandLondon

PDX Portland - LHR London Heathrow

PDXLHR

Portland

Mon 21/9

19:30-13:00

Nonstop9h 30m

London Heathrow

Wed 7/10

14:45-23:59

1 stop17h 14m

£731

PortlandLondon

PDX Portland - LHR London Heathrow

PDXLHR

Portland

Mon 26/10

18:45-11:20

Nonstop9h 35m

London Heathrow

Fri 6/11

13:35-15:50

Nonstop10h 15m

£733
Fastest return journey

PortlandLondon

PDX Portland - LHR London Heathrow

PDXLHR

Portland

Thu 22/10

19:30-13:00

Nonstop9h 30m

London Heathrow

Fri 30/10

13:35-16:50

Nonstop10h 15m

£762

PortlandLondon

PDX Portland - LHR London Heathrow

PDXLHR

Portland

Fri 11/9

14:10-13:15

1 stop15h 05m

London Heathrow

Sun 20/9

11:30-22:02

2 stops18h 32m

£794

PortlandLondon

PDX Portland - LHR London Heathrow

PDXLHR

Portland

Tue 29/9

12:34-17:40

2 stops21h 06m

London Heathrow

Tue 6/10

07:05-17:04

3 stops17h 59m

£802

PortlandLondon

PDX Portland - LHR London Heathrow

PDXLHR

Portland

Wed 2/9

10:50-12:35

1 stop17h 45m

London Heathrow

Thu 17/9

06:00-19:11

2 stops21h 11m

£816

Flights are sorted by cheapest return flights first.

Deals found on 13/8

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 13 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 £510). Flying from Portland to London Heathrow Airport in June is currently the most expensive (average of £998). 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 15 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 £623 and £883 in January.
The cheapest return price found within the last 5 days was £660 on Lufthansa (20 Jan–24 Feb).

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 15 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.
British Airways
6.7
Okay
8,156 reviews
Check prices

Food

6.4

Crew

7.7

Comfort

6.8

Boarding

7.0

Entertainment

6.5

Overall

6.7

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
8,156 reviews
British Airways
6.7
Okay
8,156 reviews
Check prices

Food

6.4

Crew

7.7

Comfort

6.8

Boarding

7.0

Entertainment

6.5

Overall

6.7

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 6 outbound flights to London Heathrow per day.

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

    For as low as £708, Delta can have you in London Heathrow Airport from Portland in 14h 46m. 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 (£438), offers the cheapest pricing from Portland to London Heathrow Airport. This flight start at 36% 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 (75%), Alaska Airlines (75%), Aer Lingus (75%).

  • 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 £510). Flying from Portland to London Heathrow Airport in June is currently the most expensive (average of £998). 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
Gatwick
Wembley
Ilford
Slough
Hayes
Croydon
Colchester
Brentford
Eastbourne
Northampton
Watford
Southend-on-Sea
Swindon
Enfield
Kingston upon Thames
Southall
Poole

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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 15 August 2026.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest£438Average£800FlexibilityNo 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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