$303+ Cheap flights from Portland (PDX) to Heathrow (LHR)
This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 11/10. Fares are subject to change and may not be available on all flights or dates of travel.
PDX — LHR
Nov 25 — Dec 21
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
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
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 23 days in advance, depart on a Monday or Sunday and return on a Tuesday
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 October 26, 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 October 26, 2026.
This Mytrip deal was found by Cheapflights users on 10/21. 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.
Thu 11/52:45 pm -
2 stops19h 45m
Wed 11/116:40 am -
2 stops18h 20m
Deal found 10/21![Multiple Airlines logo]()
$756
This Globehunters deal was found by Cheapflights users on 10/22. 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 Globehunters is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/92:45 pm -
1 stop20h 45m
Tue 11/178:35 pm -
1 stop28h 25m
Deal found 10/22![Icelandair logo]()
$776
This Cheapflightsfares deal was found by Cheapflights users on 10/22. 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 12/72:45 pm -
1 stop12h 05m
Fri 12/1112:15 pm -
1 stop12h 45m
Deal found 10/22![Icelandair logo]()
$777
This oojo deal was found by Cheapflights users on 10/21. 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.
Tue 11/172:45 pm -
1 stop12h 05m
Tue 11/248:35 pm -
1 stop28h 25m
Deal found 10/21![Icelandair logo]()
$782
This Booking.com deal was found by Cheapflights users on 10/23. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/162:45 pm -
1 stop12h 05m
Tue 11/248:35 pm -
1 stop28h 25m
Deal found 10/23![Icelandair logo]()
$784
This oojo deal was found by Cheapflights users on 10/22. 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.
Tue 11/32:45 pm -
1 stop12h 05m
Tue 11/108:35 pm -
1 stop28h 25m
Deal found 10/22![Icelandair logo]()
$785
This Kiwi.com deal was found by Cheapflights users on 10/21. 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.
Tue 11/32:45 pm -
1 stop12h 05m
Fri 11/1312:15 pm -
1 stop12h 45m
Deal found 10/21![Icelandair logo]()
$802
This Mytrip deal was found by Cheapflights users on 10/23. 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 11/162:45 pm -
2 stops21h 55m
Tue 11/246:40 pm -
3 stops30h 20m
Deal found 10/23![Multiple Airlines logo]()
$809
This Globehunters deal was found by Cheapflights users on 10/23. 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 Globehunters is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/82:45 pm -
1 stop12h 05m
Wed 12/1612:15 pm -
1 stop12h 45m
Deal found 10/23![Icelandair logo]()
$810
This Mytrip deal was found by Cheapflights users on 10/25. 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.
Tue 11/37:00 am -
3 stops30h 40m
Mon 11/97:30 pm -
3 stops31h 01m
Deal found 10/25![Multiple Airlines logo]()
$811
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 October 26, 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 October 26, 2026.
This Virgin Atlantic deal was found by Cheapflights users on 10/25. 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 Virgin Atlantic is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/197:00 am -
1 stop16h 25m
Tue 4/276:30 am -
1 stop12h 40m
Deal found 10/25![Virgin Atlantic logo]()
$892
This United Airlines deal was found by Cheapflights users on 10/25. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 2/17:00 am -
1 stop20h 50m
Wed 2/109:00 am -
2 stops19h 45m
Deal found 10/25![United Airlines logo]()
$896
This British Airways deal was found by Cheapflights users on 10/21. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/298:25 pm -
Nonstop9h 35m
Wed 4/74:30 pm -
Nonstop10h 05m
Deal found 10/21![British Airways logo]()
$918
This Alaska Airlines deal was found by Cheapflights users on 10/23. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 2/94:03 pm -
1 stop12h 17m
Mon 2/152:45 pm -
1 stop15h 59m
Deal found 10/23![Alaska Airlines logo]()
$952
This Scandinavian Airlines deal was found by Cheapflights users on 10/22. 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 12/711:01 am -
3 stops26h 39m
Fri 12/116:40 am -
2 stops23h 38m
Deal found 10/22![Scandinavian Airlines logo]()
$979
This Delta deal was found by Cheapflights users on 10/25. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/197:00 am -
1 stop16h 15m
Sat 2/276:30 am -
2 stops20h 33m
Deal found 10/25![Delta logo]()
$1,007
This British Airways deal was found by Cheapflights users on 10/26. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/105:45 pm -
Nonstop9h 35m
Mon 2/151:35 pm -
Nonstop10h 15m
Deal found 10/26![British Airways logo]()
$974
This Scandinavian Airlines deal was found by Cheapflights users on 10/25. 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 3/11:00 pm -
3 stops24h 35m
Wed 3/1010:20 am -
2 stops20h 06m
Deal found 10/25![Scandinavian Airlines logo]()
$992
This Scandinavian Airlines deal was found by Cheapflights users on 10/21. 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.
Sun 1/1710:00 am -
3 stops27h 35m
Sat 1/236:40 am -
3 stops22h 16m
Deal found 10/21![Scandinavian Airlines logo]()
$995
This Scandinavian Airlines deal was found by Cheapflights users on 10/26. 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 Scandinavian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 1/2111:05 am -
2 stops26h 35m
Mon 1/256:40 am -
3 stops22h 13m
Deal found 10/26![Scandinavian Airlines logo]()
$995
This Scandinavian Airlines deal was found by Cheapflights users on 10/22. 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.
Tue 1/197:00 am -
2 stops25h 00m
Wed 2/177:05 am -
3 stops21h 51m
Deal found 10/22![Scandinavian Airlines logo]()
$1,021
This Scandinavian Airlines deal was found by Cheapflights users on 10/21. 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.
Sun 11/157:10 am -
2 stops27h 20m
Mon 11/236:40 am -
3 stops22h 16m
Deal found 10/21![Scandinavian Airlines logo]()
$1,022
Last-minute flights from Portland to HeathrowDiscover last-minute flight deals from Portland to Heathrow. Data last updated October 26, 2026 and is based on user searches.
Discover last-minute flight deals from Portland to Heathrow. Data last updated October 26, 2026 and is based on user searches.
This oojo deal was found by Cheapflights users on 10/22. 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.
Tue 11/32:45 pm -
1 stop12h 05m
Tue 11/108:35 pm -
1 stop28h 25m
Deal found 10/22![Icelandair logo]()
$785
This Kiwi.com deal was found by Cheapflights users on 10/21. 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.
Tue 11/32:45 pm -
1 stop12h 05m
Fri 11/1312:15 pm -
1 stop12h 45m
Deal found 10/21![Icelandair logo]()
$802
This Mytrip deal was found by Cheapflights users on 10/25. 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.
Tue 11/37:00 am -
3 stops30h 40m
Mon 11/97:30 pm -
3 stops31h 01m
Deal found 10/25![Multiple Airlines logo]()
$811
This Mytrip deal was found by Cheapflights users on 10/21. 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.
Thu 11/52:45 pm -
2 stops19h 45m
Wed 11/116:40 am -
2 stops18h 20m
Deal found 10/21![Multiple Airlines logo]()
$756
This Globehunters deal was found by Cheapflights users on 10/22. 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 Globehunters is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/92:45 pm -
1 stop20h 45m
Tue 11/178:35 pm -
1 stop28h 25m
Deal found 10/22![Icelandair logo]()
$776
This Booking.com deal was found by Cheapflights users on 10/23. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/162:45 pm -
1 stop12h 05m
Tue 11/248:35 pm -
1 stop28h 25m
Deal found 10/23![Icelandair logo]()
$784
This Mytrip deal was found by Cheapflights users on 10/23. 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 11/162:45 pm -
2 stops21h 55m
Tue 11/246:40 pm -
3 stops30h 20m
Deal found 10/23![Multiple Airlines logo]()
$809
This oojo deal was found by Cheapflights users on 10/21. 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.
Tue 11/172:45 pm -
1 stop12h 05m
Tue 11/248:35 pm -
1 stop28h 25m
Deal found 10/21![Icelandair logo]()
$782
This Cheapflightsfares deal was found by Cheapflights users on 10/25. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/172:45 pm -
1 stop12h 05m
Wed 11/2512:15 pm -
1 stop12h 45m
Deal found 10/25![Icelandair logo]()
$813
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 October 26, 2026.
Search for one-way flight options from Portland to Heathrow. Find affordable one-way fares based on user searches. Data last updated October 26, 2026.
This Mytrip deal was found by Cheapflights users on 10/22. 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 11/102:45 pm -
1 stop12h 05m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/22![Icelandair logo]()
$303
This Mytrip deal was found by Cheapflights users on 10/21. 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 12/72:45 pm -
1 stop12h 05m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/21![Icelandair logo]()
$304
This Mytrip deal was found by Cheapflights users on 10/23. 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 4/57:05 pm -
1 stop32h 50m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/23![Icelandair logo]()
$307
This Gotogate deal was found by Cheapflights users on 10/23. 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.
Mon 11/162:45 pm -
1 stop12h 05m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/23![Icelandair logo]()
$310
This oojo deal was found by Cheapflights users on 10/21. 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.
Mon 11/232:45 pm -
1 stop20h 45m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/21![Icelandair logo]()
$313
This Mytrip deal was found by Cheapflights users on 10/25. 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.
Tue 12/12:45 pm -
1 stop12h 05m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/25![Icelandair logo]()
$318
This FlightHub deal was found by Cheapflights users on 10/23. 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 11/172:45 pm -
1 stop12h 05m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/23![Icelandair logo]()
$321
This Mytrip deal was found by Cheapflights users on 10/25. 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.
Sat 2/67:10 pm -
1 stop32h 40m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/25![Multiple Airlines logo]()
$323
This Mytrip deal was found by Cheapflights users on 10/23. 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 4/53:15 pm -
1 stop14h 05m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/23![Multiple Airlines logo]()
$326
This Orbitz deal was found by Cheapflights users on 10/24. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/313:15 pm -
1 stop14h 05m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/24![Air Canada logo]()
$329
This Expedia deal was found by Cheapflights users on 10/23. 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.
Mon 4/58:25 pm -
Nonstop9h 35m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/23![Iberia logo]()
$330
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 October 26, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $756 (Mytrip) |
One-way from | $303 (Mytrip) |
Popular in | June |
Cheapest in | January |
Average price | $939 |
Good round-trip deal | $902 or less |
Good one-way deal | $420 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 7,457,451 searches. Data last updated October 26, 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 Portland - LHR London Heathrow
PDXLHR
Portland
Mon 4/5
1:45 pm-10:00 am
1 stop12h 15m
London Heathrow
Wed 12/31
12:00 am-3:00 pm
Nonstop0h 00m
$339
PortlandLondon
PDX Portland - LHR London Heathrow
PDXLHR
Portland
Sat 4/3
7:10 pm-1:20 pm
1 stop34h 10m
London Heathrow
Wed 12/31
12:00 am-3:00 pm
Nonstop0h 00m
$340
PortlandLondon
PDX Portland - LHR London Heathrow
PDXLHR
Portland
Fri 3/19
7:10 pm-9:00 pm
2 stops42h 50m
London Heathrow
Wed 12/31
12:00 am-3:00 pm
Nonstop0h 00m
$340
PortlandLondon
PDX Portland - LHR London Heathrow
PDXLHR
Portland
Mon 4/5
4:05 pm-6:30 am
3 stops30h 25m
London Heathrow
Wed 12/31
12:00 am-3:00 pm
Nonstop0h 00m
$348
PortlandLondon
PDX Portland - LHR London Heathrow
PDXLHR
Portland
Mon 11/23
2:45 pm-9:35 pm
2 stops22h 50m
London Heathrow
Wed 12/31
12:00 am-3:00 pm
Nonstop0h 00m
$374
PortlandLondon
PDX Portland - LHR London Heathrow
PDXLHR
Portland
Sun 11/22
6:22 am-9:35 pm
3 stops31h 13m
London Heathrow
Wed 12/31
12:00 am-3:00 pm
Nonstop0h 00m
$515
PortlandLondon
PDX Portland - LHR London Heathrow
PDXLHR
Portland
Fri 3/19
4:05 pm-7:10 am
3 stops32h 05m
London Heathrow
Wed 12/31
12:00 am-3:00 pm
Nonstop0h 00m
$518
Quickest round-trip
PortlandLondon
PDX Portland - LHR London Heathrow
PDXLHR
Portland
Mon 12/7
5:45 pm-11:20 am
Nonstop9h 35m
London Heathrow
Wed 12/31
12:00 am-3:00 pm
Nonstop0h 00m
$600
PortlandLondon
PDX Portland - LHR London Heathrow
PDXLHR
Portland
Sun 11/22
7:10 pm-11:50 am
1 stop32h 40m
London Heathrow
Wed 12/31
12:00 am-3:00 pm
Nonstop0h 00m
$731
PortlandLondon
PDX Portland - LHR London Heathrow
PDXLHR
Portland
Wed 11/25
7:00 am-11:50 am
1 stop20h 50m
London Heathrow
Wed 12/31
12:00 am-3:00 pm
Nonstop0h 00m
$731
Showing 1-10 of 23 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 October.
| 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 Accuracy2 stars | Trust Score*3 stars | |
| Price Accuracy2 stars | Trust Score*1 star | |
| Price Accuracy2 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy- | Trust Score*1 star |
- 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
More
How far ahead should I book a flight from Portland to London Heathrow Airport?
Booking 22 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 $756). Flying from Portland to London Heathrow Airport in June is currently the most expensive (average of $1,353). 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 October 26, 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.
What’s the top layover airport for flights from Portland to London Heathrow Airport?
Share of 1-stop round-trip flights from Portland to London Heathrow Airport chosen by Cheapflights users in the past 12 months, using the same layover each way.
Boston (BOS) – chosen by Cheapflights users on 83% of 1-stop itineraries from Portland to London Heathrow Airport on Cheapflights.
What’s the cheapest layover airport for flights from Portland to London Heathrow Airport?
Average round-trip fare for 1-stop flights from Portland to London Heathrow Airport, chosen by Cheapflights users in the past 12 months, with the same layover each way.
Boston (BOS) is the most affordable 1-stop option, with an average round-trip price of $939.
What’s the fastest layover option from Portland to London Heathrow Airport?
Shortest average travel time for 1-stop one-way flights from Portland to London Heathrow Airport, based on itineraries clicked by Cheapflights users over the past 12 months, grouped by layover airport.
Flights via Reykjavik (KEF) have the shortest average one-way travel time for 1-stop routes: 12h 05m.
Which airport typically offers the quickest layover for flights from Portland to London Heathrow Airport?
Average layover duration for 1-stop one-way flights from Portland to London Heathrow Airport, chosen by Cheapflights users in the last 12 months, grouped by stopover airport.
Flights via Reykjavik (KEF) offer the fastest connection on this route, with an average layover time of 1h 20m.
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 October 26, 2026.
Peruse reviews from past customers who have flown with Alaska Airlines,American Airlines, andIcelandair 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.
Comfort
7.8
Boarding
8.1
Entertainment
7.0
Crew
8.5
Overall
7.9
Food
7.0
Reviews
1 / 20
6.0
GoodAnonymous,Jul 2026
SEA - LHR
Comfort
7.8
Boarding
8.1
Entertainment
7.0
Crew
8.5
Overall
7.9
Food
7.0
Reviews
1 / 20
6.0
GoodAnonymous,Jul 2026
SEA - LHR
Comfort
7.8
Boarding
8.1
Entertainment
7.0
Crew
8.5
Overall
7.9
Food
7.0
Reviews
1 / 20
6.0
GoodAnonymous,Jul 2026
SEA - LHR
Comfort
7.8
Boarding
8.1
Entertainment
7.0
Crew
8.5
Overall
7.9
Food
7.0
Reviews
1 / 20
6.0
GoodAnonymous,Jul 2026
SEA - LHR
Comfort
7.8
Boarding
8.1
Entertainment
7.0
Crew
8.5
Overall
7.9
Food
7.0
Reviews
1 / 20
6.0
GoodAnonymous,Jul 2026
SEA - LHR
Comfort
7.8
Boarding
8.1
Entertainment
7.0
Crew
8.5
Overall
7.9
Food
7.0
Reviews
1 / 20
6.0
GoodAnonymous,Jul 2026
SEA - LHR
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
Dorking
Gatwick
Hounslow
Wembley
Harrow
Southend-on-Sea
Basingstoke
Watford
Northampton
Dartford
Winchester
Croydon
Kingston upon Thames
Chipping Norton
Slough
Eastbourne
Stansted
Sutton
Luton
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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 October 26, 2026.
Portland and Heathrow flights
Browse other Portland and Heathrow flight options. Last updated on October 26, 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 October 26, 2026.
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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 7,457,451 searches. Data last updated October 26, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$492 | Average$787 | FlexibilityNo cancel fee | On-time76% | |
| Cheapest$578 | Average$1,139 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$596 | Average$977 | FlexibilityNo cancel fee | On-time72% | |
| Cheapest$604 | Average$957 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$630 | Average$1,028 | FlexibilityNo cancel fee | On-time67% | |
| Cheapest$630 | Average$1,160 | FlexibilityNo cancel fee | On-time76% | |
| Cheapest$637 | Average$1,003 | FlexibilityNo cancel fee | On-time77% | |
| Cheapest$641 | Average$977 | FlexibilityNo cancel fee | On-time76% | |
| Cheapest$646 | Average$1,062 | FlexibilityNo cancel fee | On-time70% | |
| Cheapest$653 | Average$1,001 | FlexibilityNo cancel fee | On-time75% |