Find flights
Deals
When to book
Airlines
FAQs

Cheap flights from Portland to London Heathrow Airport from £271

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 5/5. Fares are subject to change and may not be available on all flights or dates of travel.
PDX — LHR
30 Mar — 6 Apr1
1 adult

Cheapflights Tip: The best prices from Portland to London Heathrow are usually found in April or October, booked 64 days in advance, depart on a Friday or Tuesday and return on a Tuesday

Cheap 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 25 March 2025.

Round-trip from

£469

One-way from

£271

Popular in

June

Cheapest in

April

Average price

£581

Good round-trip deal

£475 or less

Good one-way deal

£386 or less
Iberia
  • Iberia
  • 19/8-28/8
  • Nonstop
  • 19h 30m total
  • Portland to London
Search Deals
5/5
  • 5/5
  • 3 total stops
  • 35h 14m total
  • Portland to London
Search Deals
Highest demand for flights based on searches. 22% potential increase in price (£149 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease (£25 potential savings vs. average return price).
Search Deals
Average for round-trip flights in March 2025
Search Deals
Price to beat on a round-trip flight from Portland to London Heathrow.
Search Deals
Price to beat on a one-way flight from Portland to London Heathrow.
Search Deals

Find flight deals from Portland to Heathrow

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 25 March 2025.

Tue 19/819:25PDX - LHR
Nonstop9h 35mIberia
Thu 28/815:40LHR - PDX
Nonstop9h 55mIberia
Deal found 24/3£469
Thu 8/515:20PDX - LHR
1 stop12h 35mIcelandair
Thu 15/513:05LHR - PDX
1 stop12h 50mIcelandair
Deal found 24/3£470
Mon 7/415:25PDX - LHR
1 stop13h 55mAir Canada
Tue 22/414:10LHR - PDX
1 stop27h 25mAir Canada
Deal found 24/3£475
Wed 8/1015:25PDX - LHR
1 stop13h 55mMultiple Airlines
Wed 15/1008:40LHR - PDX
2 stops18h 06mMultiple Airlines
Deal found 24/3£480
Mon 7/419:25PDX - LHR
Nonstop9h 35mFinnair
Tue 22/415:40LHR - PDX
Nonstop9h 55mFinnair
Deal found 24/3£485
Mon 7/414:00PDX - LHR
1 stop13h 20mDelta
Tue 22/408:40LHR - PDX
1 stop34h 40mDelta
Deal found 24/3£486
Sun 28/919:25PDX - LHR
Nonstop9h 35mBritish Airways
Tue 7/1015:40LHR - PDX
Nonstop9h 55mBritish Airways
Deal found 24/3£487
Sun 27/408:45PDX - LHR
1 stop19h 35mUnited Airlines
Tue 6/506:30LHR - PDX
2 stops20h 15mUnited Airlines
Deal found 24/3£489
Mon 7/410:10PDX - LHR
2 stops17h 40mLufthansa
Tue 22/414:10LHR - PDX
1 stop12h 15mLufthansa
Deal found 24/3£493
Tue 15/409:55PDX - LHR
1 stop15h 55mKLM
Tue 22/410:55LHR - PDX
1 stop15h 11mKLM
Deal found 25/3£505
Tue 15/715:15PDX - LHR
1 stop13h 35mAmerican Airlines
Wed 8/1015:40LHR - PDX
Nonstop9h 55mAmerican Airlines
Deal found 24/3£517
Fri 9/507:00PDX - LHR
1 stop15h 20mSWISS
Sat 17/508:45LHR - PDX
2 stops18h 00mSWISS
Deal found 25/3£589

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 25 March 2025.
Use the filters below to find and compare flights from Portland to London Heathrow Airport that are best for you.

Fly from

Portland

Fly to

Heathrow

Route

Depart

Return

Price

PortlandLondon

PDX - LHR

PDXLHR

Portland

Tue 19/8

19:25-13:00

Nonstop9h 35m

London Heathrow

Thu 28/8

15:40-17:35

Nonstop9h 55m

£469

PortlandLondon

PDX - LHR

PDXLHR

Portland

Thu 8/5

15:20-11:55

1 stop12h 35m

London Heathrow

Thu 15/5

13:05-17:55

1 stop12h 50m

£470

PortlandLondon

PDX - LHR

PDXLHR

Portland

Mon 7/4

15:25-13:20

1 stop13h 55m

London Heathrow

Tue 22/4

14:10-09:35

1 stop27h 25m

£475

PortlandLondon

PDX - LHR

PDXLHR

Portland

Sun 4/5

06:15-11:50

2 stops21h 35m

London Heathrow

Wed 21/5

06:00-18:45

2 stops20h 45m

£480

PortlandLondon

PDX - LHR

PDXLHR

Portland

Mon 7/4

19:25-13:00

Nonstop9h 35m

London Heathrow

Tue 22/4

15:40-17:35

Nonstop9h 55m

£485

PortlandLondon

PDX - LHR

PDXLHR

Portland

Sun 21/9

11:53-10:30

1 stop14h 37m

London Heathrow

Tue 30/9

15:30-22:58

1 stop15h 28m

£486

PortlandLondon

PDX - LHR

PDXLHR

Portland

Mon 7/4

14:00-11:20

1 stop13h 20m

London Heathrow

Tue 22/4

08:40-11:20

1 stop34h 40m

£486

PortlandLondon

PDX - LHR

PDXLHR

Portland

Sun 27/4

08:45-12:20

1 stop19h 35m

London Heathrow

Tue 6/5

06:30-18:45

2 stops20h 15m

£489

PortlandLondon

PDX - LHR

PDXLHR

Portland

Mon 7/4

10:10-11:50

2 stops17h 40m

London Heathrow

Tue 22/4

14:10-18:25

1 stop12h 15m

£493

PortlandLondon

PDX - LHR

PDXLHR

Portland

Mon 7/4

05:31-06:20

2 stops16h 49m

London Heathrow

Tue 22/4

14:25-23:02

1 stop16h 37m

£496

Flights are sorted by cheapest return flights first.

Deals found on 24/3

Showing 1-10 of 27 results
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?

Use this chart to determine the optimal time to book a return flight from Portland to Heathrow. Price data was last updated on 21 March 2025.

The best time to book flights from Portland to London Heathrow Airport is 64 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 £112). Flying from Portland to London Heathrow Airport in August is currently the most expensive (average of £164). 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 25 March 2025.

One of the essential ways to save on airfare from Portland to London Heathrow Airport is to remain as flexible as possible. Flights that are at midday tend to be the most expensive. A flight in the afternoon could potentially save you up to 21% on airfare.

Rainfall in Heathrow by month

Plan your trip to Heathrow by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in London Heathrow Airport ranges from 40.0 - 70.0 inches per month. January is typically the wettest month, when rainfall can reach 70.0 mm. July is typically the driest time to visit London Heathrow Airport when rainfall is around 40.0 mm.

Temperature in Heathrow by month

Plan your trip to Heathrow by taking into account the average temperature totals by month.

If weather is an important factor for your trip to London Heathrow Airport, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 17.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 4.0 C).

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 25 March 2025.
Get a feel of what it's like to fly with Delta, KLM and Finnair from Portland to London by reading reviews from past customers. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very Good
7,890 reviews
Check prices

Overall

8.0

Crew

8.5

Comfort

8.0

Entertainment

7.9

Boarding

8.2

Food

7.3

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Delta
8.0
Very Good
7,890 reviews
Delta
8.0
Very Good
7,890 reviews
Check prices

Overall

8.0

Crew

8.5

Comfort

8.0

Entertainment

7.9

Boarding

8.2

Food

7.3

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
KLM
7.8
Good
1,318 reviews
Delta
8.0
Very Good
7,890 reviews
Check prices

Overall

8.0

Crew

8.5

Comfort

8.0

Entertainment

7.9

Boarding

8.2

Food

7.3

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Finnair
7.6
Good
1,266 reviews
Delta
8.0
Very Good
7,890 reviews
Check prices

Overall

8.0

Crew

8.5

Comfort

8.0

Entertainment

7.9

Boarding

8.2

Food

7.3

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
SWISS
7.5
Good
1,569 reviews
Delta
8.0
Very Good
7,890 reviews
Check prices

Overall

8.0

Crew

8.5

Comfort

8.0

Entertainment

7.9

Boarding

8.2

Food

7.3

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
United Airlines
7.4
Good
8,605 reviews
Delta
8.0
Very Good
7,890 reviews
Check prices

Overall

8.0

Crew

8.5

Comfort

8.0

Entertainment

7.9

Boarding

8.2

Food

7.3

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

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. 5 airlines 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 1 outbound flight to London Heathrow per day.

  • What are the cheapest airlines flying from Portland to London Heathrow Airport round-trip?

    According to our current data, Iberia (£469), Icelandair (£470), and Air Canada (£475) offers the cheapest pricing from Portland to London Heathrow Airport. These flights start at 30% lower than the current average price 3 months from now.

  • What are the cheapest airlines to fly from Portland to London Heathrow Airport one-way?

    For one-way options, check prices for WestJet. According to our data, you can fly for as low as £302. Users have also found prices from £307 and £343 on Icelandair and Air Canada, respectively.

  • 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 (74%), Alaska Airlines (74%), Aer Lingus (74%).

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

    On average you can expect to pay £1,475 for a flight from Portland to London Heathrow Airport. The cheapest flight overall is £326 while the most popular route, (Portland - London Heathrow) is currently priced at £462.

  • 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 £112). Flying from Portland to London Heathrow Airport in August is currently the most expensive (average of £164). 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 Portland?

Book flights to Portland if you plan to visit one of these locations
Hounslow
Deal
Milton Keynes
Gatwick
Croydon
Luton
Slough
Eastbourne
Wembley
Northampton
Swindon
Hayes
Ilford
Crawley
Southend-on-Sea
Winchester
Maidstone
Ipswich
Watford
Southall

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Top 5 airlines flying from Portland to Heathrow

Discover the top 5 airlines 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 25 March 2025.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest£454Average£2,493FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
Virgin AtlanticCheapest£455Average£594FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
IberiaCheapest£471Average£696FlexibilityNo cancel feeOn-time77%
Search Iberia flights
British AirwaysCheapest£561Average£808FlexibilityNo cancel feeOn-time70%
Search British Airways flights
American AirlinesCheapest£580Average£728FlexibilityNo cancel feeOn-time71%
Search American Airlines 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!

100% Free
Cheapflights is completely free to use, so you can start saving the moment you arrive.
Book with Flexibility
Our users can plan ahead with confidence and find flights with no change fees
Travel Smart
Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.