
Most accurate provider | eDreams 3 stars |
|---|---|
Most trusted provider | eDreams 3 stars |
Round-trip from | $592 (Delta) |
One-way from | $343 (FlightHub) |
Popular in | June |
Cheapest in | October |
Average price | $638 |
Fly from
Fly to
Route
Depart
Return
Price
PortlandLondon
PWM - LHR
PWMLHR
Portland
Tue 11/11
12:48 pm-8:45 am
1 stop14h 57m
London Heathrow
Tue 11/18
11:45 am-11:54 pm
2 stops17h 09m
PortlandLondon
PWM - LHR
PWMLHR
Portland
Sun 11/9
6:35 am-6:55 am
1 stop19h 20m
London Heathrow
Tue 11/18
8:40 am-11:19 pm
2 stops19h 39m
PortlandLondon
PWM - LHR
PWMLHR
Portland
Wed 11/12
11:25 am-6:55 am
1 stop14h 30m
London Heathrow
Tue 11/18
10:00 am-11:19 pm
2 stops18h 19m
PortlandLondon
PWM - LHR
PWMLHR
Portland
Mon 11/10
6:35 am-6:20 am
1 stop18h 45m
London Heathrow
Tue 11/18
8:40 am-11:54 pm
2 stops20h 14m
PortlandLondon
PWM - LHR
PWMLHR
Portland
Tue 11/11
1:25 pm-7:50 am
1 stop13h 25m
London Heathrow
Tue 11/18
2:30 pm-11:54 pm
1 stop14h 24m
PortlandEdinburgh
PWM - EDI
PWMEDI
Portland
Wed 1/21
2:35 pm-10:40 am
2 stops15h 05m
Edinburgh Turnhouse
Sun 1/25
5:45 am-12:20 am
2 stops23h 35m
PortlandLondon
PWM - LCY
PWMLCY
Portland
Wed 11/26
7:22 pm-5:40 pm
2 stops17h 18m
London City
Wed 12/3
5:40 pm-6:54 pm
2 stops30h 14m
PortlandEdinburgh
PWM - EDI
PWMEDI
Portland
Wed 1/21
3:12 pm-7:55 am
1 stop11h 43m
Edinburgh Turnhouse
Sun 1/25
9:25 am-6:52 pm
2 stops14h 27m
PortlandManchester
PWM - MAN
PWMMAN
Portland
Fri 3/27
9:34 am-10:20 am
2 stops20h 46m
Manchester
Tue 3/31
6:05 am-7:24 pm
2 stops18h 19m
PortlandLondon
PWM - LCY
PWMLCY
Portland
Tue 11/25
2:30 pm-8:50 am
2 stops13h 20m
London City
Tue 12/2
8:40 am-11:59 pm
2 stops20h 19m
Currently, August is the cheapest month in which you can book a flight from Portland, Maine to United Kingdom (average of $311). Flying from Portland, Maine to United Kingdom in July is currently the most expensive (average of $473). 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 in the afternoon, when flights are generally more expensive, you can save up to 13% on flights from Portland, Maine to United Kingdom by exploring options for tickets in the evening.
Travelers seeking maximum savings on their Portland, Maine to United Kingdom flight should consider departing on Monday at noon when fares are most often at their lowest. Friday evenings flights should be avoided if possible as fares are typically the most expensive at this time.
Boarding
Comfort
Food
Overall
Crew
Entertainment
Reviews
Matthew,Oct 2025
GSP - ATL
Boarding
Comfort
Food
Overall
Crew
Entertainment
Reviews
Matthew,Oct 2025
GSP - ATL
Boarding
Comfort
Food
Overall
Crew
Entertainment
Reviews
Matthew,Oct 2025
GSP - ATL
Boarding
Comfort
Food
Overall
Crew
Entertainment
Reviews
Matthew,Oct 2025
GSP - ATL
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$648 | Average$1,024 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$683 | Average$913 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$695 | Average$746 | FlexibilityNo cancel fee | On-time62% |