Expect security wait times up to 30 minutes during rush hours. Use Express Lanes if eligible for faster processing.

Most accurate provider | eDreams 3 stars |
|---|---|
Most trusted provider | eDreams 3 stars |
Round-trip from | $639 (Cheapflightsfares) |
One-way from | $267 (Kiwi.com) |
Popular in | June |
Cheapest in | October |
Average price | $921 |
Good round-trip deal | $639 or less |
Good one-way deal | $479 or less |
Fly from
Fly to
Route
Depart
Return
Price
PortlandLondon
PDX - LHR
PDXLHR
Portland
Wed 4/15
1:45 pm-1:10 pm
2 stops15h 25m
London Heathrow
Thu 4/30
6:30 am-11:10 am
1 stop12h 40m
PortlandLondon
PDX - LTN
PDXLTN
Portland
Thu 3/12
3:45 pm-3:50 pm
2 stops17h 05m
London Luton
Mon 3/16
6:30 am-6:00 pm
2 stops18h 30m
PortlandLondon
PDX - LTN
PDXLTN
Portland
Tue 3/17
3:45 pm-2:50 pm
1 stop16h 05m
London Luton
Wed 3/25
8:00 am-6:00 pm
1 stop17h 00m
PortlandLondon
PDX - LHR
PDXLHR
Portland
Tue 2/10
7:38 am-6:50 am
1 stop15h 12m
London Heathrow
Wed 2/25
1:45 pm-3:55 pm
Nonstop10h 10m
PortlandLondon
PDX - LCY
PDXLCY
Portland
Tue 1/13
11:10 am-5:20 pm
2 stops22h 10m
London City
Tue 1/20
8:05 pm-11:25 am
1 stop23h 20m
PortlandLondon
PDX - LGW
PDXLGW
Portland
Mon 4/20
10:53 am-5:50 pm
2 stops46h 57m
London Gatwick
Thu 4/30
9:25 am-10:08 pm
2 stops20h 43m
PortlandLondon
PDX - LHR
PDXLHR
Portland
Mon 4/27
7:30 pm-1:00 pm
Nonstop9h 30m
London Heathrow
Tue 5/5
3:40 pm-5:40 pm
Nonstop10h 00m
PortlandLondon
PDX - LCY
PDXLCY
Portland
Wed 1/14
1:25 pm-4:35 pm
1 stop19h 10m
London City
Wed 2/4
7:45 am-7:13 pm
2 stops19h 28m
PortlandLondon
PDX - LHR
PDXLHR
Portland
Tue 1/6
3:46 pm-7:25 am
1 stop31h 39m
London Heathrow
Wed 1/14
2:30 pm-2:40 pm
1 stop32h 10m
PortlandLondon
PDX - LHR
PDXLHR
Portland
Sun 3/1
6:56 am-9:00 am
1 stop18h 04m
London Heathrow
Sun 3/15
6:30 am-12:25 pm
1 stop12h 55m
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy2 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*1 star | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy2 stars | Trust Score*3 stars | |
| Price Accuracy2 stars | Trust Score*2 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy- | Trust Score*1 star |
The price you pay for your flight from Portland to London may vary depending on when you book. For the best chance of a lower fare, look to book 46 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.
Currently, October is the cheapest month in which you can book a flight from Portland to London (average of $525). Flying from Portland to London in June is currently the most expensive (average of $836). 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.
Unlike at noon, when flights are generally more expensive, you can save up to 24% on flights from Portland to London by exploring options for tickets in the afternoon.
Travelers seeking maximum savings on their Portland to London flight should consider departing on Sunday at noon when fares are most often at their lowest. Monday mornings flights should be avoided if possible as fares are typically the most expensive at this time.
Vancouver (YVR) – chosen by Cheapflights users on 50% of 1-stop itineraries from Portland to London on Cheapflights.
Reykjavik (KEF) is the most affordable 1-stop option, with an average round-trip price of $567.
Flights via Reykjavik (KEF) have the shortest average one-way travel time for 1-stop routes: 12h 05m.
Flights via Vancouver (YVR) offer the fastest connection on this route, with an average layover time of 3h 46m.
Overall
Boarding
Crew
Comfort
Food
Entertainment
Reviews
Jim,Nov 2025
AVL - ATL
Overall
Boarding
Crew
Comfort
Food
Entertainment
Reviews
Jim,Nov 2025
AVL - ATL
Overall
Boarding
Crew
Comfort
Food
Entertainment
Reviews
Jim,Nov 2025
AVL - ATL
Overall
Boarding
Crew
Comfort
Food
Entertainment
Reviews
Jim,Nov 2025
AVL - ATL
Overall
Boarding
Crew
Comfort
Food
Entertainment
Reviews
Jim,Nov 2025
AVL - ATL
Overall
Boarding
Crew
Comfort
Food
Entertainment
Reviews
Jim,Nov 2025
AVL - ATL
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$495 | Average$791 | FlexibilityNo cancel fee | On-time76% | |
| Cheapest$552 | Average$863 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$558 | Average$733 | FlexibilityNo cancel fee | On-time72% | |
| Cheapest$561 | Average$659 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$577 | Average$793 | FlexibilityNo cancel fee | On-time77% | |
| Cheapest$591 | Average$846 | FlexibilityNo cancel fee | On-time70% | |
| Cheapest$600 | Average$1,408 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$619 | Average$951 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$633 | Average$888 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$641 | Average$978 | FlexibilityNo cancel fee | On-time76% |