Price observed over the last 3 months for a round trip.
Compare all flight tickets and find cheap flights from Portland to London
The cheapest flights right now
Portland – London
Outbound – Nov 9, 2026
2 stops
18h 15m KEF
ARN
Return – Nov 25, 2026
2 stops
18h 20m ARN
KEF
$605
today
Portland – London
Outbound – Nov 9, 2026
1 stop
12h 5m KEF
Return – Nov 25, 2026
1 stop
13h 5m KEF
$779
today
Portland – London
Outbound – Nov 9, 2026
1 stop
12h 5m KEF
Return – Nov 25, 2026
1 stop
12h 45m KEF
$812
today
Portland – London
Outbound – Oct 26, 2026
1 stop
12h 5m KEF
Return – Nov 11, 2026
1 stop
12h 45m KEF
$810
3 days ago
* Prices are in USD per passenger, including taxes, for a round trip. Prices are based on searches carried out within the last 72 hours. Please note that availability and ticket prices are subject to change and should not be considered as the final price quoted.
Cheapest flight tickets
$605
Average price of a round trip
$805
Average flight ticket price recorded over the last 3 months for a round trip.
Flight duration
9h30
A flight from Portland to London takes on average 9h30.
Best time
August
According to user searches, the ideal month to go to London is August.
Tips for finding a cheap flight from Portland to London
Check out our tips for booking your flight to London (United Kingdom) from Portland (USA) at the cheapest possible price.
Usually, the cheapest month to pick up a ticket on this route is September, with an average flight ticket price of $760 (calculation over the last two years). The most touristic season corresponds to the months of September, February and October.
For the cheapest flights, it is advisable to buy your ticket at least 36 days before the departure date.
The airline offering the cheapest flight tickets is Icelandair. A ticket from the airline Icelandair to London costs on average $753.
The airlines that offer the most flights are British Airways and British Airways.
Price of flight tickets from Portland to London
Here is some information and tips to know before booking your flight:
- Flight ticket prices range from $605 to $1009
- The average price of a flight ticket is about $805
- Prices are lowest for stays in the month of September
- The month in which booking a ticket is cheaper is: September
info departure city :
Portland, USA
airports :
Portland International Airport (PDX)
Pearson Airpark (VUO)
local time :
Portland is a city in the country USA, the time zone is [[timezone]]. In Portland, it is currently {fromLocalTime}, the temperature is on average 15°C, with a minimum of 12°C and a maximum of 20°C.
The city of Portland has 2 airport(s): Portland and Pearson Airpark
destination info :
London, United Kingdom
airports :
London City Airport (LCY)
London Gatwick Airport (LGW)
London Heathrow Airport (LHR)
London Luton Airport (LTN)
London-Stansted Airport (STN)
local time :
London is in the country United Kingdom, the time zone is [[timezone]]. In London, it is currently {toLocalTime}, the temperature is on average 20°C, with a minimum of 17°C and a maximum of 22°C.
The city of London (LON) has 5 airport(s): London City, London Gatwick, London Heathrow, London Luton and London-Stansted
Useful info about London
What is the least touristic period to go to London?
If you want to visit London during the least touristic period, choose the month of August.
What is the most popular time to travel to London?
In London, the most popular month is September. It is during this period that the prices offered by airlines are also the highest.
When should I book my flight from Portland to London?
According to our data, it is recommended to book your flight 36 days before your departure. If you book your flight ticket 6 weeks before your departure, you may find a price below average. The cheapest day to book a flight from Portland to London is Tuesday.
What are the arrival and destination airports when traveling between Portland and London?
When you leave, you can leave from Portland, and you will arrive at London Gatwick, London Heathrow or London-Stansted.
How to reach Portland airport from the city centre?
The airport Portland is located 10 km or Pearson Airpark is located 10 km from the city centre. You can access it by using public transportation, taking a taxi, or renting a car.
Are there other means of transportation to go from Portland to London?
Airplane is the only means of transportation listed on Liligo for this journey.
Are there big differences in weather between Portland and London?
In summer, the average temperature is 18°C in London and 20°C in Portland. The average rainfall in summer is 63 mm in London and 19 mm in Portland. In summer, it is warmer in Portland and it rains less in Portland. In winter, it is colder in London and it rains more in Portland.
