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 | $599 (Cheapflightsfares) |
One-way from | $254 (Trip.com) |
Popular in | June |
Cheapest in | October |
Average price | $719 |
Good round-trip deal | $648 or less |
Good one-way deal | $400 or less |
Fly from
Fly to
Route
Depart
Return
Price
PortlandLondon
PDX - LHR
PDXLHR
Portland
Sun 3/1
5:45 pm-11:20 am
Nonstop9h 35m
London Heathrow
Thu 3/12
10:15 am-10:02 pm
1 stop18h 47m
PortlandLondon
PDX - LHR
PDXLHR
Portland
Mon 3/16
6:05 am-7:05 am
1 stop18h 00m
London Heathrow
Mon 4/6
7:15 pm-11:10 am
1 stop23h 55m
PortlandLondon
PDX - LHR
PDXLHR
Portland
Tue 4/21
7:00 am-8:05 am
1 stop17h 05m
London Heathrow
Thu 4/30
3:40 pm-5:40 pm
Nonstop10h 00m
PortlandLondon
PDX - LHR
PDXLHR
Portland
Sun 3/1
4:00 pm-9:40 am
1 stop33h 40m
London Heathrow
Sun 3/8
2:30 pm-2:40 pm
1 stop31h 10m
PortlandLondon
PDX - LHR
PDXLHR
Portland
Thu 2/12
6:57 pm-9:40 am
1 stop30h 43m
London Heathrow
Thu 2/19
2:30 pm-9:15 am
1 stop26h 45m
PortlandLondon
PDX - LTN
PDXLTN
Portland
Mon 3/16
3:45 pm-1:40 pm
2 stops14h 55m
London Luton
Mon 3/23
6:30 am-6:00 pm
2 stops18h 30m
PortlandLondon
PDX - LHR
PDXLHR
Portland
Tue 2/10
11:59 am-11:40 am
1 stop15h 41m
London Heathrow
Sun 2/15
6:30 am-11:25 am
1 stop12h 55m
PortlandLondon
PDX - LHR
PDXLHR
Portland
Sun 3/15
7:00 am-10:15 am
1 stop20h 15m
London Heathrow
Sat 3/21
8:40 am-12:25 pm
1 stop34h 45m
PortlandLondon
PDX - LHR
PDXLHR
Portland
Wed 3/4
5:40 am-8:35 am
1 stop18h 55m
London Heathrow
Sun 3/8
1:45 pm-4:55 pm
Nonstop10h 10m
PortlandLondon
PDX - LHR
PDXLHR
Portland
Thu 3/12
7:30 am-7:25 am
1 stop16h 55m
London Heathrow
Thu 3/19
6:50 am-8:40 pm
2 stops20h 50m
| 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, December is the cheapest month in which you can book a flight from Portland to London (average of $517). Flying from Portland to London in June is currently the most expensive (average of $831). 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.
When flying from Portland to London, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.
Entertainment
Crew
Overall
Comfort
Food
Boarding
Reviews
Jim,Nov 2025
AVL - ATL
Entertainment
Crew
Overall
Comfort
Food
Boarding
Reviews
Jim,Nov 2025
AVL - ATL
Entertainment
Crew
Overall
Comfort
Food
Boarding
Reviews
Jim,Nov 2025
AVL - ATL
Entertainment
Crew
Overall
Comfort
Food
Boarding
Reviews
Jim,Nov 2025
AVL - ATL
Entertainment
Crew
Overall
Comfort
Food
Boarding
Reviews
Jim,Nov 2025
AVL - ATL
Entertainment
Crew
Overall
Comfort
Food
Boarding
Reviews
Jim,Nov 2025
AVL - ATL
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$489 | Average$749 | FlexibilityNo cancel fee | On-time76% | |
| Cheapest$552 | Average$861 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$558 | Average$737 | FlexibilityNo cancel fee | On-time72% | |
| Cheapest$561 | Average$659 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$576 | Average$782 | FlexibilityNo cancel fee | On-time77% | |
| Cheapest$587 | Average$843 | FlexibilityNo cancel fee | On-time70% | |
| Cheapest$600 | Average$1,498 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$619 | Average$962 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$633 | Average$897 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$645 | Average$960 | FlexibilityNo cancel fee | On-time76% |