Heathrow's strict security means longer wait times. Ensure liquids are in one bag and remove suspicious items to avoid delays.

Most accurate provider | eDreams 3 stars |
|---|---|
Most trusted provider | eDreams 3 stars |
Round-trip from | $705 (Flightnetwork) |
One-way from | $412 (Kiwi.com) |
Popular in | July |
Cheapest in | September |
Average price | $887 |
Good round-trip deal | $737 or less |
Good one-way deal | $629 or less |
Fly from
Fly to
Route
Depart
Return
Price
LondonPortland
LGW - PDX
LGWPDX
London Gatwick
Mon 11/17
11:55 am-5:00 pm
1 stop13h 05m
Portland
Mon 12/1
2:45 pm-10:55 am
1 stop12h 10m
LondonPortland
LHR - PDX
LHRPDX
London Heathrow
Wed 11/26
12:15 pm-5:00 pm
1 stop12h 45m
Portland
Tue 12/2
2:45 pm-10:50 am
1 stop12h 05m
LondonPortland
LHR - PDX
LHRPDX
London Heathrow
Wed 11/26
12:15 pm-5:00 pm
1 stop12h 45m
Portland
Mon 12/1
2:45 pm-10:50 am
1 stop12h 05m
LondonPortland
LHR - PDX
LHRPDX
London Heathrow
Tue 11/25
8:35 pm-5:00 pm
1 stop28h 25m
Portland
Tue 12/2
2:45 pm-10:50 am
1 stop12h 05m
LondonPortland
LGW - PDX
LGWPDX
London Gatwick
Fri 3/6
11:55 am-5:00 pm
1 stop13h 05m
Portland
Tue 3/10
3:45 pm-10:55 am
1 stop12h 10m
LondonPortland
LHR - PDX
LHRPDX
London Heathrow
Wed 12/10
7:30 am-6:06 pm
2 stops18h 36m
Portland
Thu 1/29
10:47 am-11:05 am
2 stops16h 18m
LondonPortland
LHR - PDX
LHRPDX
London Heathrow
Mon 12/8
8:30 am-10:15 pm
2 stops21h 45m
Portland
Mon 12/15
7:00 am-5:55 am
1 stop14h 55m
LondonPortland
LHR - PDX
LHRPDX
London Heathrow
Fri 3/6
12:15 pm-5:00 pm
1 stop12h 45m
Portland
Tue 3/10
3:45 pm-10:50 am
1 stop12h 05m
LondonPortland
LHR - PDX
LHRPDX
London Heathrow
Mon 12/8
11:55 am-9:24 pm
1 stop17h 29m
Portland
Mon 12/15
5:45 pm-11:20 am
Nonstop9h 35m
LondonPortland
LCY - PDX
LCYPDX
London City
Wed 12/10
9:50 am-12:37 am
2 stops22h 47m
Portland
Thu 1/29
7:00 am-12:55 pm
2 stops21h 55m
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy2 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*1 star | |
| Price Accuracy2 stars | Trust Score*3 stars |
To ensure you get the cheapest price possible for a flight from London to Portland, you should look to book at least 53 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.
Currently, December is the cheapest month in which you can book a flight from London to Portland (average of $591). Flying from London to Portland in July is currently the most expensive (average of $751). 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 optimal to fly from London to Portland in the evening. By choosing this option you can save up to 27% on the cost of your flight, compared to a flight in the morning.
Comfort
Entertainment
Food
Overall
Boarding
Crew
Reviews
Nordia,Sep 2025
KIN - MIA
Comfort
Entertainment
Food
Overall
Boarding
Crew
Reviews
Nordia,Sep 2025
KIN - MIA
Comfort
Entertainment
Food
Overall
Boarding
Crew
Reviews
Nordia,Sep 2025
KIN - MIA
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$707 | Average$823 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$715 | Average$906 | FlexibilityNo cancel fee | On-time70% | |
| Cheapest$737 | Average$953 | FlexibilityNo cancel fee | On-time71% |