Cheap flights from Portland (PWM) to London (LON) from $539

This is the cheapest one-way flight price, found on 6/7. Prices may vary by date and flight preferences.
PWM — LON
Jun 13 — Jun 201

The best prices from Portland to London are usually found in February or November, booked 53 days in advance, depart on a Monday or Sunday and return on a Tuesday

How to find the cheapest flight from Portland (PWM) to London (LON)

All the information you need to plan the best PWM to LON flight in 2023: compare Portland to London flight prices with the expected peak season, weather and rainfall in London.

Popular in

July

Cheapest in

February

Average price

$994

Round-trip from

$633
High demand for flights, 43% potential price rise
Best time to find cheap flights, 21% potential price drop
Average for round-trip flights in June 2023
From Portland to London (LON)

PWM - LON

Price

$633 - $1,115

LON

Temperature

39.2 - 62.6 °F

LON

Rainfall

1.6 - 2.8 inches

Cheap flights from Portland to London in June, July 2023

The best prices found for PWM to LON flights for June, July
The lowest fares we've come across on flights traveling from Portland to London in June and July 2023. Check back soon for alternative fares.

Portland to London 2023 flight deals

Cheap flights to London from Portland found for this year
The lowest fares we've come across on flights traveling from Portland to London in June and July 2023. Check back soon for alternative fares.

Cheap United Airlines flights from Portland to London

Find some of the cheapest United Airlines flights traveling from Portland to London. Make sure to double check the flight details before booking.

Cheap Virgin Atlantic flights from Portland to London

Take a gander at the lowest prices we've found on Virgin Atlantic flights from Portland to London. If these deals don't fit your criteria, make sure to check back soon as new deals are always added.

One-way flights to London from Portland

The cheapest one-way flights from Portland to London
Take a look at some of the one-way flights we've detected from Portland to London. Those seeking round-trip flights from Portland to London should utilize the search form at the the top of the page.

Find flights from Portland to London within your budget

Use the slider to find flights from Portland to London that fit your budget.

Fly from

Any airport

Fly to

Any airport

Budget

$716 - $1,316

Route

Depart

Return

Price

PortlandLondon Gatwick

PWM - LGW

PWMLGW

Portland

Wed 11/1

1 stop16h 45m

London Gatwick

Wed 11/8

1 stop16h 30m

PortlandLondon Gatwick

PWM - LGW

PWMLGW

Portland

Wed 11/1

2 stops15h 41m

London Gatwick

Wed 11/8

2 stops13h 45m

PortlandLondon Heathrow

PWM - LHR

PWMLHR

Portland

Wed 11/1

1 stop14h 27m

London Heathrow

Wed 11/8

2 stops16h 04m

PortlandLondon Gatwick

PWM - LGW

PWMLGW

Portland

Thu 10/12

1 stop15h 40m

London Gatwick

Mon 10/16

1 stop12h 54m

PortlandLondon Heathrow

PWM - LHR

PWMLHR

Portland

Wed 11/1

1 stop14h 55m

London Heathrow

Wed 11/8

1 stop15h 20m

PortlandLondon Heathrow

PWM - LHR

PWMLHR

Portland

Thu 10/12

2 stops13h 50m

London Heathrow

Mon 10/16

3 stops19h 49m

PortlandLondon Heathrow

PWM - LHR

PWMLHR

Portland

Thu 10/12

3 stops17h 20m

London Heathrow

Mon 10/16

3 stops19h 49m

PortlandLondon Heathrow

PWM - LHR

PWMLHR

Portland

Thu 7/20

1 stop19h 25m

London Heathrow

Tue 8/1

1 stop11h 32m

PortlandLondon Gatwick

PWM - LGW

PWMLGW

Portland

Thu 10/12

2 stops32h 25m

London Gatwick

Mon 10/16

2 stops22h 35m

Flights are sorted by cheapest first

Deals found on 6/7

Reviews of airlines servicing London

Read reviews from past customers who have flown United Airlines, Virgin Atlantic and KLM from Portland to London. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
2,415 reviews

Comfort

7.9

Food

7.2

Boarding

8.1

Overall

8.0

Entertainment

7.8

Crew

8.5

Reviews

1 / 10

Smooth and communicative process. No connection issues and early arrivals

Delta
8.0
Very good
2,415 reviews
Delta
8.0
Very good
2,415 reviews

Comfort

7.9

Food

7.2

Boarding

8.1

Overall

8.0

Entertainment

7.8

Crew

8.5

Reviews

1 / 10

Smooth and communicative process. No connection issues and early arrivals

United Airlines
7.6
Good
1,574 reviews
Delta
8.0
Very good
2,415 reviews

Comfort

7.9

Food

7.2

Boarding

8.1

Overall

8.0

Entertainment

7.8

Crew

8.5

Reviews

1 / 10

Smooth and communicative process. No connection issues and early arrivals

KLM
7.6
Good
160 reviews
Delta
8.0
Very good
2,415 reviews

Comfort

7.9

Food

7.2

Boarding

8.1

Overall

8.0

Entertainment

7.8

Crew

8.5

Reviews

1 / 10

Smooth and communicative process. No connection issues and early arrivals

JetBlue
7.5
Good
624 reviews
Delta
8.0
Very good
2,415 reviews

Comfort

7.9

Food

7.2

Boarding

8.1

Overall

8.0

Entertainment

7.8

Crew

8.5

Reviews

1 / 10

Smooth and communicative process. No connection issues and early arrivals

Austrian Airlines
7.4
Good
154 reviews
Delta
8.0
Very good
2,415 reviews

Comfort

7.9

Food

7.2

Boarding

8.1

Overall

8.0

Entertainment

7.8

Crew

8.5

Reviews

1 / 10

Smooth and communicative process. No connection issues and early arrivals

Related info for your journey

Useful info, stats and facts about Portland to London flights.

Top 3 airlines flying from Portland to London

The chart below displays the airlines Cheapflights users traveling from Portland to London choose most often. Cheapest and average prices are based on aggregated data from the past 12 months.
AirlineCheapestAverageFlexibilityOn-timeCOVID-19 safety
DeltaCheapest$648Average$827FlexibilityNo cancel feeOn-timeN/ACOVID-19 safety
Search Delta flights
United AirlinesCheapest$690Average$805FlexibilityNo cancel feeOn-time69%COVID-19 safety
Search United Airlines flights
American AirlinesCheapest$711Average$1,163FlexibilityNo cancel feeOn-time71%COVID-19 safety
Search American Airlines flights
100% Free
Cheapflights is completely free to use, so you can start saving the moment you arrive.
Book with Flexibility
Our users can plan ahead with confidence and find flights with no change fees
Travel Smart
Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.