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$280+ Cheap flights from Portland (PDX) to Heathrow (LHR)

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 10/21. Fares are subject to change and may not be available on all flights or dates of travel.
PDX — LHR
Aug 29 — Sep 51
Sat 8/29
Sat 9/5
1 adult, Economy
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Find cheap flights from Portland to Heathrow with Cheapflights

1. Tell us where you want to go

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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 Monday or Tuesday and return on a Wednesday

Cheap 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 July 30, 2026.

This FlightHub deal was found by Cheapflights users on 7/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/410:00 am
PDX
-
LHR
1 stop17h 50m
Multiple Airlines
Wed 11/111:45 pm
LHR
-
PDX
2 stops39h 17m
Multiple Airlines
Deal found 7/30$874
This Delta deal was found by Cheapflights users on 7/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/41:10 pm
PDX
-
LHR
1 stop12h 50m
Delta
Wed 11/116:30 am
LHR
-
PDX
1 stop12h 50m
Delta
Deal found 7/30$875
This Cheapflightsfares deal was found by Cheapflights users on 7/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/410:00 am
PDX
-
LHR
2 stops17h 20m
Lufthansa
Wed 11/116:30 am
LHR
-
PDX
2 stops22h 32m
Lufthansa
Deal found 7/30$878
This Cheapflightsfares deal was found by Cheapflights users on 7/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/45:45 pm
PDX
-
LHR
Nonstop9h 35m
British Airways
Wed 11/111:35 pm
LHR
-
PDX
Nonstop10h 15m
British Airways
Deal found 7/30$880
This Justfly.com deal was found by Cheapflights users on 7/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/267:00 am
PDX
-
LHR
2 stops19h 20m
Multiple Airlines
Thu 11/59:00 am
LHR
-
PDX
2 stops21h 27m
Multiple Airlines
Deal found 7/27$881
This Expedia deal was found by Cheapflights users on 7/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/115:45 pm
PDX
-
LHR
Nonstop9h 35m
Iberia
Thu 11/2610:05 am
LHR
-
PDX
1 stop17h 38m
Iberia
Deal found 7/29$882
This Cheapflightsfares deal was found by Cheapflights users on 7/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/2311:42 pm
PDX
-
LHR
1 stop22h 48m
JetBlue
Sun 8/308:40 am
LHR
-
PDX
1 stop22h 09m
JetBlue
Deal found 7/30$883
This Gotogate deal was found by Cheapflights users on 7/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/67:00 pm
PDX
-
LHR
1 stop17h 20m
Icelandair
Wed 9/161:05 pm
LHR
-
PDX
1 stop12h 50m
Icelandair
Deal found 7/30$884
This Cheapflightsfares deal was found by Cheapflights users on 7/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/97:00 pm
PDX
-
LHR
1 stop17h 20m
Icelandair
Wed 9/161:05 pm
LHR
-
PDX
1 stop12h 50m
Icelandair
Deal found 7/30$885
This KAYAK deal was found by Cheapflights users on 7/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/2610:00 am
PDX
-
LHR
1 stop18h 50m
Lufthansa
Fri 11/66:35 am
LHR
-
PDX
2 stops26h 09m
Lufthansa
Deal found 7/28$886
This Delta deal was found by Cheapflights users on 7/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/227:33 pm
PDX
-
LHR
2 stops16h 37m
Delta
Fri 11/278:40 am
LHR
-
PDX
2 stops23h 19m
Delta
Deal found 7/28$889
This Cheapflightsfares deal was found by Cheapflights users on 7/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/3010:00 am
PDX
-
LHR
1 stop17h 50m
Lufthansa
Mon 12/77:30 pm
LHR
-
PDX
2 stops33h 03m
Lufthansa
Deal found 7/27$890

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 July 30, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$874
(FlightHub)

One-way from

$280
(Trip.com)

Popular in

June

Cheapest in

January

Average price

$1,292

Good round-trip deal

$975 or less

Good one-way deal

$403 or less
Provider with most accurate pricing for Portland-London Heathrow flight deals.
Search Deals
Provider most trusted by Cheapflights users for Portland-London Heathrow flights.
Search Deals
From Portland to London Heathrow
Search Deals
One-way flight from Portland to London Heathrow
Search Deals
Highest demand for flights based on searches. 22% potential increase in price ($264 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($38 potential savings vs. average RT 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
Price to beat on a one-way flight from Portland to London Heathrow.
Search Deals

Cheapflights Fare Finder

 
Customize 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 2,558,603 searches. Data last updated July 30, 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 round-trip

PortlandLondon

PDX - LHR

PDXLHR

Portland

Sun 9/20

12:34 pm-11:20 am

1 stop14h 46m

London Heathrow

Mon 9/28

7:15 pm-11:10 am

1 stop23h 55m

$955

PortlandLondon

PDX - LHR

PDXLHR

Portland

Wed 9/16

12:34 pm-3:35 pm

1 stop19h 01m

London Heathrow

Tue 9/22

6:30 am-11:10 am

1 stop12h 40m

$955

PortlandLondon

PDX - LHR

PDXLHR

Portland

Tue 9/15

3:21 pm-3:35 pm

1 stop16h 14m

London Heathrow

Tue 9/22

6:30 am-11:10 am

1 stop12h 40m

$955

PortlandLondon

PDX - LHR

PDXLHR

Portland

Sun 9/20

11:48 am-10:50 am

1 stop15h 02m

London Heathrow

Tue 10/6

3:40 pm-5:40 pm

Nonstop10h 00m

$981

PortlandLondon

PDX - LHR

PDXLHR

Portland

Wed 10/7

2:26 pm-12:50 pm

1 stop14h 24m

London Heathrow

Tue 10/13

3:40 pm-5:40 pm

Nonstop10h 00m

$984

PortlandLondon

PDX - LHR

PDXLHR

Portland

Thu 9/3

5:54 pm-3:35 pm

1 stop13h 41m

London Heathrow

Thu 9/10

6:30 am-11:10 am

1 stop12h 40m

$1,005

PortlandLondon

PDX - LHR

PDXLHR

Portland

Tue 12/1

11:05 am-9:35 pm

3 stops26h 30m

London Heathrow

Mon 12/7

6:40 am-10:40 pm

2 stops24h 00m

$1,052

PortlandLondon

PDX - LHR

PDXLHR

Portland

Thu 1/21

10:00 am-5:40 pm

3 stops23h 40m

London Heathrow

Mon 1/25

6:40 am-9:27 pm

2 stops22h 47m

$1,053

PortlandLondon

PDX - LHR

PDXLHR

Portland

Sat 9/5

1:42 pm-3:35 pm

1 stop17h 53m

London Heathrow

Sat 9/12

8:40 am-9:03 pm

2 stops20h 23m

$1,065
Quickest round-trip

PortlandLondon

PDX - LHR

PDXLHR

Portland

Thu 8/27

7:30 pm-1:00 pm

Nonstop9h 30m

London Heathrow

Tue 9/8

3:40 pm-5:40 pm

Nonstop10h 00m

$1,080

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/29

Showing 1-10 of 22 resultsSorted by cheapest first
1
2
3

Compare providers for flights from Portland to Heathrow

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Portland to Heathrow in July.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
AranGrantPrice Accuracy3 starsTrust Score*3 stars
OvagoPrice Accuracy3 starsTrust Score*3 stars
BusinessClassPrice Accuracy3 starsTrust Score*3 stars
BudgetAirPrice Accuracy2 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Portland-London Heathrow Airport flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Portland-London Heathrow Airport flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Portland-London Heathrow Airport flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Portland-London Heathrow Airport flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Portland-London Heathrow Airport flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

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 round-trip 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?

Booking 13 days in advance of your planned departure date is, on average, the best time to get cheap flights from Portland to London Heathrow Airport. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

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 $690). Flying from Portland to London Heathrow Airport in June is currently the most expensive (average of $1,346). 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 July 30, 2026.

When flying from Portland to London Heathrow Airport, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

How much does it cost to fly round-trip from Portland to London Heathrow Airport?

Airfare is typical for this route at the moment.

Portland to London Heathrow Airport flights typically cost between $765 and $1,163 in November.
The cheapest round-trip price found within the last 5 days was $874 on Multiple Airlines (Nov 4-Nov 11).

The best insider tips for Portland to London Heathrow Airport flights

AI-powered summary based on content written by travel experts. AI can make mistakes.
Cheapflights partnered with top experts to bring you the best recommendations for your Portland to London Heathrow Airport trip
Our travel experts
Brandon Schultz

Brandon Schultz

Expert on PDX

Brandon Schultz is an award-winning food and travel writer based in New York City. His work has appeared in Forbes, AAA, Thrillist, Travel + Leisure, and The Daily Meal, among many others, and he is the author of 6 books, including 3 cookbooks.

Read more
Ramsey Qubein

Ramsey Qubein

Expert on LHR

An avid traveler and aviation expert who has visited 173 countries, all 50 states and seven continents, Ramsey Qubein flies nearly 400,000 miles a year. As a North Carolina-based freelance journalist for publications including Conde Nast Traveler, Forbes, USA Today and Bloomberg among others, he explores the latest trends in aviation, hospitality, cruises and business.

Read more

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 July 30, 2026.
Peruse reviews from past customers who have flown with Delta,Virgin Atlantic, andAmerican Airlines from Portland to London Heathrow Airport to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
7.8
Good
8,487 reviews

Crew

8.5

Entertainment

7.8

Overall

7.8

Comfort

7.8

Food

7.2

Boarding

8.1

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2026

SEA - KOA

The snacks were not very good, not everyone was very friendly and professional
Delta
7.8
Good
8,487 reviews
Delta
7.8
Good
8,487 reviews

Crew

8.5

Entertainment

7.8

Overall

7.8

Comfort

7.8

Food

7.2

Boarding

8.1

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2026

SEA - KOA

The snacks were not very good, not everyone was very friendly and professional
Virgin Atlantic
7.5
Good
694 reviews
Delta
7.8
Good
8,487 reviews

Crew

8.5

Entertainment

7.8

Overall

7.8

Comfort

7.8

Food

7.2

Boarding

8.1

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2026

SEA - KOA

The snacks were not very good, not everyone was very friendly and professional
American Airlines
7.1
Good
11,842 reviews
Delta
7.8
Good
8,487 reviews

Crew

8.5

Entertainment

7.8

Overall

7.8

Comfort

7.8

Food

7.2

Boarding

8.1

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2026

SEA - KOA

The snacks were not very good, not everyone was very friendly and professional
Icelandair
7.0
Good
716 reviews
Delta
7.8
Good
8,487 reviews

Crew

8.5

Entertainment

7.8

Overall

7.8

Comfort

7.8

Food

7.2

Boarding

8.1

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2026

SEA - KOA

The snacks were not very good, not everyone was very friendly and professional
British Airways
6.7
Okay
8,127 reviews
Delta
7.8
Good
8,487 reviews

Crew

8.5

Entertainment

7.8

Overall

7.8

Comfort

7.8

Food

7.2

Boarding

8.1

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2026

SEA - KOA

The snacks were not very good, not everyone was very friendly and professional

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?

    Most people fly from Portland (PDX) if they book a flight from Portland to London Heathrow. On average, Portland has 6 outbound flights to London Heathrow per day from 12 airlines. Portland is conveniently located just 6.0 mi from Portland’s city center.

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

    Virgin Atlantic, Delta, and Finnair can get you from Portland to London Heathrow Airport in just under 14h 46m. Your travel time can differ by up to 4h 15m. There are 4896 mi between Portland and London Heathrow Airport. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

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

    According to our current data, Icelandair ($492), Iberia ($525), and Virgin Atlantic ($542) offers the cheapest pricing from Portland to London Heathrow Airport. Icelandair is priced at 46% lower than the current average price of a flight leaving 3 months from now.

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

    One-way options have recently been found by users for as low as $226 on Delta. Other airlines that offer cheap prices include Alaska Airlines from $329 and Icelandair from $337 one-way.

  • 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 (73%), Alaska Airlines (73%), Aer Lingus (73%).

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

    On average you can expect to pay $3,509 for a flight from Portland to London Heathrow Airport. The cheapest flight overall is $354 while the most popular route, (Portland - London Heathrow) is currently priced at $677.

  • 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 vacation 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 $690). Flying from Portland to London Heathrow Airport in June is currently the most expensive (average of $1,346). 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

Traveling to a place near London Heathrow Airport?

Book flights to London Heathrow Airport if you plan to visit one of these locations
Ilford
Dorking
Hounslow
Winchester
Croydon
Gatwick
Wembley
Harrow
Eastleigh
Southend-on-Sea
Watford
Northampton
Dartford
Chipping Norton
Kingston upon Thames
Eastbourne
Slough
Stansted
Sutton
Luton

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Portland to Heathrow

See prices for flight routes from nearby airports that may be better suited for you.
Portland to Gatwick flights
Boise to Heathrow flights
Boise to Gatwick flights

Top 10 airlines flying from Portland to Heathrow

Discover the top 10 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 2,558,603 searches. Data last updated July 30, 2026.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest$492Average$662FlexibilityNo cancel feeOn-time76%
IberiaCheapest$525Average$899FlexibilityNo cancel feeOn-time77%
Virgin AtlanticCheapest$542Average$778FlexibilityNo cancel feeOn-time72%
DeltaCheapest$544Average$957FlexibilityNo cancel feeOn-timeN/A
British AirwaysCheapest$584Average$979FlexibilityNo cancel feeOn-time70%
Alaska AirlinesCheapest$600Average$1,051FlexibilityNo cancel feeOn-time75%
United AirlinesCheapest$602Average$983FlexibilityNo cancel feeOn-time69%
KLMCheapest$604Average$803FlexibilityNo cancel feeOn-time75%
LufthansaCheapest$630Average$1,145FlexibilityNo cancel feeOn-time76%
FinnairCheapest$641Average$984FlexibilityNo cancel feeOn-time76%

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