$314+ 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 10/5. Fares are subject to change and may not be available on all flights or dates of travel.
PDX — LHR
May 29 — Jun 51
Round-trip
1 adult, Economy
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Find cheap flights from Portland to Heathrow with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
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Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheapflights Tip: The best prices from Portland to London Heathrow are usually found in January or February, booked 40 days in advance, depart on a Monday or Sunday and return on a Saturday
Cheap flight deals from Portland to Heathrow
Cheapest
Best
Last-minute
One-way
Cheapest flights from Portland to HeathrowExplore 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 April 29, 2026.
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 April 29, 2026.
This Mytrip deal was found by Cheapflights users on 4/26. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/210:10 am
PDX
- LHR
3 stops27h 10m
Multiple Airlines
Wed 6/109:05 pm
LHR
- PDX
3 stops30h 05m
Multiple Airlines
Deal found 4/26![Multiple Airlines logo]()
$838
This FlightHub deal was found by Cheapflights users on 4/27. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/217:00 am
PDX
- LHR
2 stops18h 35m
Scandinavian Airlines
Mon 9/287:30 pm
LHR
- PDX
2 stops29h 03m
Scandinavian Airlines
Deal found 4/27![Scandinavian Airlines logo]()
$859
This FlightHub deal was found by Cheapflights users on 4/28. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/151:38 pm
PDX
- LHR
2 stops18h 22m
Scandinavian Airlines
Tue 9/296:40 am
LHR
- PDX
2 stops17h 53m
Scandinavian Airlines
Deal found 4/28![Scandinavian Airlines logo]()
$860
This CrystalTravel deal was found by Cheapflights users on 4/28. 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 CrystalTravel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/197:30 pm
PDX
- LHR
Nonstop9h 30m
British Airways
Wed 9/23:40 pm
LHR
- PDX
Nonstop10h 00m
British Airways
Deal found 4/28![British Airways logo]()
$862
This Scandinavian Airlines deal was found by Cheapflights users on 4/28. 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 Scandinavian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/287:00 am
PDX
- LHR
2 stops27h 30m
Scandinavian Airlines
Mon 10/127:05 am
LHR
- PDX
2 stops22h 22m
Scandinavian Airlines
Deal found 4/28![Scandinavian Airlines logo]()
$865
This Mytrip deal was found by Cheapflights users on 4/26. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/610:10 am
PDX
- LHR
3 stops22h 50m
Multiple Airlines
Sun 5/106:40 am
LHR
- PDX
3 stops34h 50m
Multiple Airlines
Deal found 4/26![Multiple Airlines logo]()
$870
This Mytrip deal was found by Cheapflights users on 4/25. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/227:05 pm
PDX
- LHR
3 stops29h 50m
Multiple Airlines
Fri 5/2910:20 am
LHR
- PDX
2 stops33h 25m
Multiple Airlines
Deal found 4/25![Multiple Airlines logo]()
$871
This CrystalTravel deal was found by Cheapflights users on 4/25. 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 CrystalTravel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/167:30 pm
PDX
- LHR
Nonstop9h 30m
British Airways
Wed 9/233:40 pm
LHR
- PDX
Nonstop10h 00m
British Airways
Deal found 4/25![British Airways logo]()
$873
This FlightHub deal was found by Cheapflights users on 4/25. 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.
Fri 9/181:38 pm
PDX
- LHR
2 stops18h 22m
Scandinavian Airlines
Mon 9/287:30 pm
LHR
- PDX
2 stops29h 03m
Scandinavian Airlines
Deal found 4/25![Scandinavian Airlines logo]()
$876
Best flights from Portland to HeathrowDiscover carefully curated flight deals from Portland to Heathrow that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated April 29, 2026.
Discover carefully curated flight deals from Portland to Heathrow that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated April 29, 2026.
This Delta deal was found by Cheapflights users on 4/24. 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.
Tue 9/151:38 pm
PDX
- LHR
1 stop17h 57m
Delta
Tue 9/226:30 am
LHR
- PDX
1 stop12h 40m
Delta
Deal found 4/24![Delta logo]()
$878
This Virgin Atlantic deal was found by Cheapflights users on 4/28. 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 Virgin Atlantic is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/75:45 pm
PDX
- LHR
1 stop13h 50m
Virgin Atlantic
Mon 9/147:15 pm
LHR
- PDX
1 stop23h 55m
Virgin Atlantic
Deal found 4/28![Virgin Atlantic logo]()
$879
This KLM deal was found by Cheapflights users on 4/26. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/181:25 pm
PDX
- LHR
1 stop15h 40m
KLM
Sun 9/276:30 am
LHR
- PDX
1 stop12h 40m
KLM
Deal found 4/26![KLM logo]()
$978
This Scandinavian Airlines deal was found by Cheapflights users on 4/25. 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 Scandinavian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/261:00 pm
PDX
- LHR
3 stops25h 35m
Scandinavian Airlines
Thu 11/57:05 am
LHR
- PDX
3 stops23h 21m
Scandinavian Airlines
Deal found 4/25![Scandinavian Airlines logo]()
$1,009
This Virgin Atlantic deal was found by Cheapflights users on 4/28. 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 Virgin Atlantic is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/73:50 pm
PDX
- LHR
1 stop15h 45m
Virgin Atlantic
Mon 9/218:55 pm
LHR
- PDX
1 stop22h 15m
Virgin Atlantic
Deal found 4/28![Virgin Atlantic logo]()
$879
This Delta deal was found by Cheapflights users on 4/28. 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.
Tue 10/1311:40 am
PDX
- LHR
1 stop15h 40m
Delta
Tue 10/206:30 am
LHR
- PDX
2 stops16h 35m
Delta
Deal found 4/28![Delta logo]()
$888
This Delta deal was found by Cheapflights users on 4/26. 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.
Sat 9/1210:05 pm
PDX
- LHR
1 stop14h 05m
Delta
Fri 9/256:30 am
LHR
- PDX
2 stops17h 28m
Delta
Deal found 4/26![Delta logo]()
$888
This Virgin Atlantic deal was found by Cheapflights users on 4/28. 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 Virgin Atlantic is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/273:50 pm
PDX
- LHR
1 stop15h 45m
Virgin Atlantic
Thu 9/37:15 pm
LHR
- PDX
1 stop23h 55m
Virgin Atlantic
Deal found 4/28![Virgin Atlantic logo]()
$929
This Scandinavian Airlines deal was found by Cheapflights users on 4/24. 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 Scandinavian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/167:00 am
PDX
- LHR
2 stops25h 00m
Scandinavian Airlines
Tue 9/226:40 am
LHR
- PDX
2 stops20h 01m
Scandinavian Airlines
Deal found 4/24![Scandinavian Airlines logo]()
$1,032
This Delta deal was found by Cheapflights users on 4/27. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/1210:05 pm
PDX
- LHR
1 stop14h 05m
Delta
Sun 9/206:30 am
LHR
- PDX
2 stops20h 11m
Delta
Deal found 4/27![Delta logo]()
$938
This Delta deal was found by Cheapflights users on 4/28. 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.
Thu 8/277:40 pm
PDX
- LHR
1 stop11h 55m
Delta
Thu 9/38:40 am
LHR
- PDX
2 stops19h 35m
Delta
Deal found 4/28![Delta logo]()
$938
This Delta deal was found by Cheapflights users on 4/26. 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.
Sat 10/39:45 pm
PDX
- LHR
1 stop24h 40m
Delta
Sat 10/106:30 am
LHR
- PDX
2 stops20h 13m
Delta
Deal found 4/26![Delta logo]()
$1,002
Last-minute flights from Portland to HeathrowDiscover last-minute flight deals from Portland to Heathrow. Data last updated April 29, 2026 and is based on user searches.
Discover last-minute flight deals from Portland to Heathrow. Data last updated April 29, 2026 and is based on user searches.
This FlightHub deal was found by Cheapflights users on 4/25. 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.
Mon 5/47:00 am
PDX
- LHR
2 stops30h 40m
Scandinavian Airlines
Mon 5/117:05 am
LHR
- PDX
2 stops21h 55m
Scandinavian Airlines
Deal found 4/25![Scandinavian Airlines logo]()
$896
This Scandinavian Airlines deal was found by Cheapflights users on 4/25. 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 Scandinavian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/47:00 am
PDX
- LHR
2 stops26h 40m
Scandinavian Airlines
Tue 5/266:40 am
LHR
- PDX
2 stops20h 46m
Scandinavian Airlines
Deal found 4/25![Scandinavian Airlines logo]()
$911
This Mytrip deal was found by Cheapflights users on 4/26. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/610:10 am
PDX
- LHR
3 stops22h 50m
Multiple Airlines
Sun 5/106:40 am
LHR
- PDX
3 stops34h 50m
Multiple Airlines
Deal found 4/26![Multiple Airlines logo]()
$870
This Mytrip deal was found by Cheapflights users on 4/26. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/113:30 pm
PDX
- LHR
1 stop12h 25m
Multiple Airlines
Sun 5/176:30 am
LHR
- PDX
3 stops39h 20m
Multiple Airlines
Deal found 4/26![Multiple Airlines logo]()
$943
This Mytrip deal was found by Cheapflights users on 4/25. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/227:05 pm
PDX
- LHR
3 stops29h 50m
Multiple Airlines
Fri 5/2910:20 am
LHR
- PDX
2 stops33h 25m
Multiple Airlines
Deal found 4/25![Multiple Airlines logo]()
$871
This Mytrip deal was found by Cheapflights users on 4/24. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/227:05 pm
PDX
- LHR
3 stops29h 50m
Multiple Airlines
Mon 6/15:00 pm
LHR
- PDX
2 stops26h 45m
Multiple Airlines
Deal found 4/24![Multiple Airlines logo]()
$907
This Mytrip deal was found by Cheapflights users on 4/26. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/263:30 pm
PDX
- LHR
2 stops22h 10m
Multiple Airlines
Tue 6/25:00 pm
LHR
- PDX
2 stops32h 55m
Multiple Airlines
Deal found 4/26![Multiple Airlines logo]()
$888
This Mytrip deal was found by Cheapflights users on 4/26. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/277:05 pm
PDX
- LHR
2 stops15h 45m
Multiple Airlines
Wed 6/109:25 pm
LHR
- PDX
1 stop22h 20m
Multiple Airlines
Deal found 4/26![Multiple Airlines logo]()
$920
One-way flights from Portland to HeathrowSearch for one-way flight options from Portland to Heathrow. Find affordable one-way fares based on user searches. Data last updated April 29, 2026.
Search for one-way flight options from Portland to Heathrow. Find affordable one-way fares based on user searches. Data last updated April 29, 2026.
This Kiwi.com deal was found by Cheapflights users on 4/25. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/53:30 pm
PDX
- LHR
2 stops17h 30m
Multiple Airlines
Deal found 4/25![Multiple Airlines logo]()
$314
This CrystalTravel deal was found by Cheapflights users on 4/25. 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 CrystalTravel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/57:30 pm
PDX
- LHR
Nonstop9h 30m
British Airways
Deal found 4/25![British Airways logo]()
$324
This Kiwi.com deal was found by Cheapflights users on 4/26. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/47:05 pm
PDX
- LHR
2 stops29h 50m
Multiple Airlines
Deal found 4/26![Multiple Airlines logo]()
$325
This CrystalTravel deal was found by Cheapflights users on 4/26. 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 CrystalTravel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/77:30 pm
PDX
- LHR
Nonstop9h 30m
British Airways
Deal found 4/26![British Airways logo]()
$326
This CrystalTravel deal was found by Cheapflights users on 4/26. 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 CrystalTravel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/127:30 pm
PDX
- LHR
Nonstop9h 30m
British Airways
Deal found 4/26![British Airways logo]()
$327
This CrystalTravel deal was found by Cheapflights users on 4/28. 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 CrystalTravel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/197:30 pm
PDX
- LHR
Nonstop9h 30m
British Airways
Deal found 4/28![British Airways logo]()
$328
This Cheapflightsfares deal was found by Cheapflights users on 4/27. 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.
Tue 9/297:30 pm
PDX
- LHR
Nonstop9h 30m
British Airways
Deal found 4/27![British Airways logo]()
$330
This Cheapflightsfares deal was found by Cheapflights users on 4/28. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/61:30 pm
PDX
- LHR
1 stop14h 40m
British Airways
Deal found 4/28![British Airways logo]()
$334
This Kiwi.com deal was found by Cheapflights users on 4/24. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/197:05 pm
PDX
- LHR
2 stops30h 30m
Multiple Airlines
Deal found 4/24![Multiple Airlines logo]()
$337
This oojo deal was found by Cheapflights users on 4/29. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/57:39 am
PDX
- LHR
1 stop17h 21m
British Airways
Deal found 4/29![British Airways logo]()
$338
This Delta deal was found by Cheapflights users on 4/29. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/110:55 pm
PDX
- LHR
1 stop23h 30m
Delta
Deal found 4/29![Delta logo]()
$339
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 April 29, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $838 (Mytrip) |
One-way from | $314 (Kiwi.com) |
Popular in | June |
Cheapest in | January |
Average price | $746 |
Good round-trip deal | $985 or less |
Good one-way deal | $418 or less |
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 April 29, 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
Cheapest round-trip
PortlandLondon
PDX - LHR
PDXLHR
Portland
Tue 9/15
1:38 pm-3:35 pm
1 stop17h 57m
London Heathrow
Tue 9/22
6:30 am-11:10 am
1 stop12h 40m
$878
PortlandLondon
PDX - LHR
PDXLHR
Portland
Mon 9/7
5:45 pm-3:35 pm
1 stop13h 50m
London Heathrow
Mon 9/14
7:15 pm-11:10 am
1 stop23h 55m
$879
PortlandLondon
PDX - LHR
PDXLHR
Portland
Mon 9/7
3:50 pm-3:35 pm
1 stop15h 45m
London Heathrow
Mon 9/21
8:55 pm-11:10 am
1 stop22h 15m
$879
PortlandLondon
PDX - LHR
PDXLHR
Portland
Tue 10/13
11:40 am-11:20 am
1 stop15h 40m
London Heathrow
Tue 10/20
6:30 am-3:05 pm
2 stops16h 35m
$888
PortlandLondon
PDX - LHR
PDXLHR
Portland
Sat 9/12
10:05 pm-8:10 pm
1 stop14h 05m
London Heathrow
Fri 9/25
6:30 am-3:58 pm
2 stops17h 28m
$888
PortlandLondon
PDX - LHR
PDXLHR
Portland
Thu 8/27
3:50 pm-3:35 pm
1 stop15h 45m
London Heathrow
Thu 9/3
7:15 pm-11:10 am
1 stop23h 55m
$929
PortlandLondon
PDX - LHR
PDXLHR
Portland
Sat 9/12
10:05 pm-8:10 pm
1 stop14h 05m
London Heathrow
Sun 9/20
6:30 am-6:41 pm
2 stops20h 11m
$938
PortlandLondon
PDX - LHR
PDXLHR
Portland
Thu 8/27
7:40 pm-3:35 pm
1 stop11h 55m
London Heathrow
Thu 9/3
8:40 am-8:15 pm
2 stops19h 35m
$938
Quickest round-trip
PortlandLondon
PDX - LHR
PDXLHR
Portland
Fri 9/18
1:25 pm-1:05 pm
1 stop15h 40m
London Heathrow
Sun 9/27
6:30 am-11:10 am
1 stop12h 40m
$978
PortlandLondon
PDX - LHR
PDXLHR
Portland
Sat 10/3
9:45 pm-6:25 am
1 stop24h 40m
London Heathrow
Sat 10/10
6:30 am-6:43 pm
2 stops20h 13m
$1,002
Showing 1-10 of 21 resultsSorted by cheapest first
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 April.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars |
- 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.
PDX-LHR
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
Prices
Airlines
How far ahead should I book a flight from Portland to London Heathrow Airport?
Booking 39 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 $687). Flying from Portland to London Heathrow Airport in June is currently the most expensive (average of $1,287). 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 April 29, 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.
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
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 April 29, 2026.
Peruse reviews from past customers who have flown with Delta,United Airlines, 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.
Boarding
8.1
Overall
7.9
Comfort
7.9
Food
7.2
Crew
8.5
Entertainment
7.8
Reviews
1 / 20
6.0
GoodJim,Nov 2025
AVL - ATL
Boarding
8.1
Overall
7.9
Comfort
7.9
Food
7.2
Crew
8.5
Entertainment
7.8
Reviews
1 / 20
6.0
GoodJim,Nov 2025
AVL - ATL
Boarding
8.1
Overall
7.9
Comfort
7.9
Food
7.2
Crew
8.5
Entertainment
7.8
Reviews
1 / 20
6.0
GoodJim,Nov 2025
AVL - ATL
Boarding
8.1
Overall
7.9
Comfort
7.9
Food
7.2
Crew
8.5
Entertainment
7.8
Reviews
1 / 20
6.0
GoodJim,Nov 2025
AVL - ATL
Boarding
8.1
Overall
7.9
Comfort
7.9
Food
7.2
Crew
8.5
Entertainment
7.8
Reviews
1 / 20
6.0
GoodJim,Nov 2025
AVL - ATL
Boarding
8.1
Overall
7.9
Comfort
7.9
Food
7.2
Crew
8.5
Entertainment
7.8
Reviews
1 / 20
6.0
GoodJim,Nov 2025
AVL - ATL
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.
Traveling to a place near London Heathrow Airport?
Book flights to London Heathrow Airport if you plan to visit one of these locationsIlford
Hounslow
Winchester
Croydon
Gatwick
Southend-on-Sea
Harrow
Eastleigh
Dartford
Dover
Orpington
Watford
Northampton
Borehamwood
Broadway
Chipping Norton
Hayes
Kingston upon Thames
Eastbourne
Slough
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Alternative routes for Portland to Heathrow
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Complete your trip
Complete your trip to Heathrow by adding a car rental and/or hotel reservation to your travel itinerary.
Search flights from Portland to Heathrow by cabin class
Find flights from Portland to Heathrow, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Other flights to Heathrow
Explore flights to Heathrow departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on April 29, 2026.
Portland and Heathrow flights
Browse other Portland and Heathrow flight options. Last updated on April 29, 2026.
Other flights from Portland
Browse through other flights departing from Portland. Flights are based on user searches made on Cheapflights and were last updated on April 29, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
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 April 29, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$492 | Average$629 | FlexibilityNo cancel fee | On-time76% | |
| Cheapest$552 | Average$915 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$558 | Average$761 | FlexibilityNo cancel fee | On-time72% | |
| Cheapest$561 | Average$659 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$575 | Average$871 | FlexibilityNo cancel fee | On-time70% | |
| Cheapest$589 | Average$1,031 | FlexibilityNo cancel fee | On-time77% | |
| Cheapest$600 | Average$1,101 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$607 | Average$993 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$630 | Average$881 | FlexibilityNo cancel fee | On-time67% | |
| Cheapest$664 | Average$977 | FlexibilityNo cancel fee | On-time76% |