
Most accurate provider | eDreams 3 stars |
|---|---|
Most trusted provider | eDreams 3 stars |
Round-trip from | $584 (Delta) |
Popular in | June |
Cheapest in | May |
Average price | $799 |
Fly from
Fly to
Route
Depart
Return
Price
PortlandLondon
PWM - LHR
PWMLHR
Portland
lun. 12/1
4:53 pm-8:45 am
1 stop10h 52m
London Heathrow
dom. 12/14
10:45 am-10:23 pm
1 stop16h 38m
PortlandLondon
PWM - LHR
PWMLHR
Portland
vie. 2/6
2:35 pm-8:05 am
1 stop12h 30m
London Heathrow
dom. 2/8
4:35 pm-12:20 am
1 stop12h 45m
PortlandLondon
PWM - LHR
PWMLHR
Portland
lun. 12/1
7:44 pm-7:10 am
2 stops30h 26m
London Heathrow
dom. 12/14
1:25 pm-6:42 pm
2 stops34h 17m
PortlandLondon
PWM - LHR
PWMLHR
Portland
jue. 2/26
2:35 pm-8:05 am
1 stop12h 30m
London Heathrow
jue. 3/19
11:45 am-11:49 pm
2 stops16h 04m
PortlandLondon
PWM - LHR
PWMLHR
Portland
jue. 2/26
2:35 pm-1:45 pm
2 stops18h 10m
London Heathrow
jue. 3/19
11:45 am-11:49 pm
2 stops16h 04m
PortlandLondon
PWM - LHR
PWMLHR
Portland
lun. 12/1
4:52 pm-11:15 am
1 stop13h 23m
London Heathrow
dom. 12/14
1:25 pm-9:10 am
2 stops24h 45m
PortlandLondon
PWM - LHR
PWMLHR
Portland
mar. 12/16
2:34 pm-1:50 pm
2 stops18h 16m
London Heathrow
mar. 12/23
8:00 pm-12:20 pm
1 stop21h 20m
PortlandLondon
PWM - LHR
PWMLHR
Portland
vie. 3/27
6:30 am-8:10 pm
1 stop9h 40m
London Heathrow
mar. 3/31
11:45 am-11:49 pm
2 stops17h 04m
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy3 stars | Trust Score*1 star | |
| Price Accuracy3 stars | Trust Score*3 stars |
Currently, February is the cheapest month in which you can book a flight from Portland, Maine to London Heathrow Airport (average of $361). Flying from Portland, Maine to London Heathrow Airport in June is currently the most expensive (average of $595). 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.
It’s typically best to fly out from Portland, Maine to London Heathrow Airport in the evening. Doing so could potentially save you 11% on the flight price compared to flying in the morning, which is usually more expensive.
Entertainment
Food
Crew
Overall
Boarding
Comfort
Reviews
Jim,Nov 2025
AVL - ATL
Entertainment
Food
Crew
Overall
Boarding
Comfort
Reviews
Jim,Nov 2025
AVL - ATL
Entertainment
Food
Crew
Overall
Boarding
Comfort
Reviews
Jim,Nov 2025
AVL - ATL
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$648 | Average$924 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$825 | Average$963 | FlexibilityNo cancel fee | On-timeN/A |