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Cheap flights from Portland to London Heathrow Airport from £196

PDX — LHR
5 Dec — 12 Dec1
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 23 days in advance, depart on a Thursday or Friday and return on a Tuesday

Cheap flight deals from Portland to Heathrow

Enter your travel dates to find the best prices.

Cheapest flights from Portland to Heathrow

Tue 1/1207:00 -
3 stops30h 35m
Tue 8/1217:30 -
3 stops29h 11m
Deal found 4/11£557
Mon 30/1114:45 -
1 stop12h 05m
Fri 4/1212:15 -
1 stop12h 45m
Deal found 3/11£558
Mon 30/1114:45 -
1 stop20h 45m
Thu 10/1220:35 -
1 stop28h 25m
Deal found 1/11£560
Tue 10/1114:45 -
1 stop12h 05m
Fri 20/1112:15 -
1 stop12h 45m
Deal found 1/11£560
Tue 1/1214:45 -
1 stop20h 45m
Tue 15/1220:35 -
1 stop28h 25m
Deal found 3/11£562
Mon 30/1114:45 -
1 stop12h 05m
Mon 7/1212:15 -
1 stop12h 45m
Deal found 5/11£564
Tue 1/1214:45 -
1 stop12h 05m
Sun 13/1220:35 -
1 stop28h 25m
Deal found 4/11£565
Tue 10/1114:45 -
1 stop20h 45m
Thu 19/1120:35 -
1 stop28h 25m
Deal found 1/11£566
Mon 16/1114:45 -
1 stop12h 05m
Mon 23/1112:15 -
1 stop12h 45m
Deal found 2/11£566
Tue 10/1114:45 -
1 stop12h 05m
Sun 15/1112:15 -
1 stop12h 45m
Deal found 2/11£568
Mon 16/1114:45 -
2 stops22h 35m
Tue 24/1118:20 -
3 stops30h 40m
Deal found 5/11£571

Find flight deals from Portland to Heathrow

Round-trip from

£552

One-way from

£196

Popular in

June

Cheapest in

January

Average price

£735

Good round-trip deal

£1,636 or less
Icelandair
  • Icelandair
  • 20/4-27/4
  • 2 total stops
  • 40h 55m total
  • Portland to London
Search Deals
Icelandair
  • Icelandair
  • 30/11-31/12
  • 1 total stop
  • 12h 05m total
  • Portland to London
Search Deals
Highest demand for flights based on searches. 17% potential increase in price (£121 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease (£18 potential savings vs. average return price).
Search Deals
Average for round-trip flights in November 2026
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Price to beat on a round-trip flight from Portland to London Heathrow.
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Cheapflights Fare Finder

 
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

Mon 15/2

14:45-10:50

1 stop12h 05m

London Heathrow

Wed 31/12

00:00-15:00

Nonstop0h 00m

£197

PortlandLondon

PDX Portland - LHR London Heathrow

PDXLHR

Portland

Wed 14/4

15:15-13:20

1 stop14h 05m

London Heathrow

Wed 31/12

00:00-15:00

Nonstop0h 00m

£252

PortlandLondon

PDX Portland - LHR London Heathrow

PDXLHR

Portland

Sat 20/3

19:10-09:20

2 stops31h 10m

London Heathrow

Wed 31/12

00:00-15:00

Nonstop0h 00m

£252

PortlandLondon

PDX Portland - LHR London Heathrow

PDXLHR

Portland

Sat 3/4

19:10-13:20

1 stop34h 10m

London Heathrow

Wed 31/12

00:00-15:00

Nonstop0h 00m

£252

PortlandLondon

PDX Portland - LHR London Heathrow

PDXLHR

Portland

Tue 8/12

14:45-17:00

2 stops18h 15m

London Heathrow

Wed 31/12

00:00-15:00

Nonstop0h 00m

£253

PortlandLondon

PDX Portland - LHR London Heathrow

PDXLHR

Portland

Tue 9/3

16:05-07:10

3 stops31h 05m

London Heathrow

Wed 31/12

00:00-15:00

Nonstop0h 00m

£258

PortlandLondon

PDX Portland - LHR London Heathrow

PDXLHR

Portland

Tue 17/11

14:45-21:40

3 stops22h 55m

London Heathrow

Wed 31/12

00:00-15:00

Nonstop0h 00m

£273

PortlandLondon

PDX Portland - LHR London Heathrow

PDXLHR

Portland

Wed 20/1

14:45-08:55

3 stops34h 10m

London Heathrow

Wed 31/12

00:00-15:00

Nonstop0h 00m

£284
Fastest return journey

PortlandLondon

PDX Portland - LHR London Heathrow

PDXLHR

Portland

Thu 22/4

20:25-14:00

Nonstop9h 35m

London Heathrow

Wed 31/12

00:00-15:00

Nonstop0h 00m

£285

PortlandLondon

PDX Portland - LHR London Heathrow

PDXLHR

Portland

Thu 22/4

13:39-19:20

2 stops21h 41m

London Heathrow

Wed 31/12

00:00-15:00

Nonstop0h 00m

£285

Flights are sorted by cheapest return flights first.

Deals found on 31/10

Showing 1-10 of 23 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.
Estimated return price

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 22 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 £563). Flying from Portland to London Heathrow Airport in June is currently the most expensive (average of £1,013). 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?

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 below average for this route at the moment.

Portland to London Heathrow Airport flights typically cost between £621 and £818 in April.
The cheapest return price found within the last 5 days was £552 on Icelandair (20 Apr–27 Apr).

Reviews of airlines servicing Heathrow

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
8,282 reviews
Check prices

Comfort

6.8

Crew

7.7

Entertainment

6.5

Overall

6.7

Boarding

7.0

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
8,282 reviews
British Airways
6.7
Okay
8,282 reviews
Check prices

Comfort

6.8

Crew

7.7

Entertainment

6.5

Overall

6.7

Boarding

7.0

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

  • 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 4 outbound flights to London Heathrow per day.

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

    For as low as £573, Icelandair can have you in London Heathrow Airport from Portland in 12h 25m. 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 (£457), offers the cheapest pricing from Portland to London Heathrow Airport. This flight start at 39% 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 (79%), Alaska Airlines (79%), Aer Lingus (79%).

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

    On average you can expect to pay £1,687 for a flight from Portland to London Heathrow Airport. The cheapest flight overall is £990 while the most popular route, (Portland - London Heathrow) is currently priced at £498.

  • 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 £563). Flying from Portland to London Heathrow Airport in June is currently the most expensive (average of £1,013). 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
Luton
Milton Keynes
Wembley
Gatwick
Slough
Ilford
Hayes
Croydon
Eastbourne
Northampton
Barnet
Brentford
Southend-on-Sea
Enfield
Southall
Harrow
Watford
Folkestone
Dagenham

Browse thousands of different options on Cheapflights for your next trip

Top airline flying from Portland to Heathrow

AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest£457Average£836FlexibilityNo cancel feeOn-time70%
Search British Airways flights

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Users can book flights with no change fees policies with our dedicated filters. Book flights from Portland to Heathrow flexibly with Cheapflights today.

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