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

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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 2021: compare Portland to London flight prices with the expected peak season, weather and rainfall in London.
PWM - LON
Price
$818 - $1,610
LON
Temperature
39.2 - 62.6 °F
LON
Precipitation
1.6 - 2.8 inches

Popular in

May

High demand for flights, 33% potential price rise

Cheapest in

February

Best time to find cheap flights, 24% potential price drop

Round-trip from

$818

From Portland to London (LON)

One-way from

$439

One-way flight from Portland to London (LON)

Flight route prices based on searches on Cheapflights within the last 3 days, monthly prices based on aggregated historical data.
How far in advance should I book a flight from Portland, Maine to London?

When searching for a good deal, it’s best to be prepared for potential fluctuations in price. We recommend booking at least 61 days in advance, which can save you up to 83% on flights from Portland, Maine to London compared to booking the week you need them. Waiting 61 days out may not be for everyone, so we have options available for flights within the next two weeks, with the lowest price starting at $597. For sooner than that we have options available in the next 3 days from $762.

When is the cheapest time to fly from Portland, Maine to London (PWM - LON)?

Unlike in the morning, when flights are generally more expensive, you can save up to 15% on flights from Portland, Maine to London by exploring options for tickets in the afternoon.

What is the cheapest day to fly round-trip from Portland, Maine to London?

Leaving on a Friday is a viable option for saving on travel. Heavily demanded days of the week can typically drive up the prices you see. Booking your travel for a less competitive day can save up to 47% on the overall cost on flights from Portland, Maine to London.

Cheap flights from Portland to London in October, November 2021

The best prices found for PWM to LON flights for October, November
15 Nov - 22 Nov
$600pp
PWM
Portland
United Airlines
   
2 STOPS
LHR
London Heathrow
LHR
London Heathrow
United Airlines
   
2 STOPS
PWM
Portland
16 Nov - 23 Nov
$633pp
PWM
Portland
KLM
   
2 STOPS
LCY
London City
LCY
London City
KLM
   
2 STOPS
PWM
Portland
11 Nov - 18 Nov
$633pp
PWM
Portland
United Airlines
 
1 STOP
LHR
London Heathrow
LHR
London Heathrow
United Airlines
   
2 STOPS
PWM
Portland

Portland to London 2021 flight deals

Cheap flights to London from Portland found for this year
28 Dec - 11 Jan
$571pp
PWM
Portland
United Airlines
 
1 STOP
LHR
London Heathrow
LHR
London Heathrow
United Airlines
   
2 STOPS
PWM
Portland
28 Dec - 11 Jan
$572pp
PWM
Portland
United Airlines
 
1 STOP
LHR
London Heathrow
LHR
London Heathrow
United Airlines
   
2 STOPS
PWM
Portland
28 Dec - 11 Jan
$590pp
PWM
Portland
Delta
 
1 STOP
LHR
London Heathrow
LHR
London Heathrow
Delta
 
1 STOP
PWM
Portland

Last minute flights from Portland to London

Late deals on round-trip flights to London from Portland, departing today and this week
22 Oct - 24 Oct
$880pp
PWM
Portland
Multiple Airlines
   
2 STOPS
LHR
London Heathrow
LHR
London Heathrow
Multiple Airlines
   
2 STOPS
PWM
Portland
22 Oct - 24 Oct
$1,270pp
PWM
Portland
United Airlines
 
1 STOP
LHR
London Heathrow
LHR
London Heathrow
United Airlines
   
2 STOPS
PWM
Portland
22 Oct - 24 Oct
$1,382pp
PWM
Portland
Virgin Atlantic
 
1 STOP
LHR
London Heathrow
LHR
London Heathrow
Virgin Atlantic
 
1 STOP
PWM
Portland

One-way flights to London from Portland

The cheapest one-way flights from Portland to London
2:35 pm - 3:05 pm
Delta
1 Stop
19h 30m
PWM - LHR
Delta
$439
Delta
9:20 am - 1:30 am
United Airlines
2 Stops
35h 10m
PWM - LHR
United Airlines
$445
United
3:05 am - 5:00 am
WestJet
2 Stops
21h 55m
PWM - LGW
WestJet

Related info for your journey

Useful info, stats and facts about <span class="emphasized">Portland</span> to <span class="emphasized">London</span> flights.

Flight FAQs

From Portland to London

What airport do you fly from for flights from Portland to London?

Portland (PWM) is the airport you will fly out of if you book a flight from Portland to London. You should not have trouble finding flights to London from Portland; the airport handles an average of 0 outbound flights to London per day. You should also have plenty of airline options to choose from since 3 airlines have flights from the Portland airport to London. It is only a 2.9 mi journey to Portland (PWM) from Portland’s city center.

Which airlines flying from Portland to London have flexible cancellations due to COVID-19?

Some of the carriers operating flights from Portland to London that may be offering flexible cancellation policies are American Airlines, Delta, and United Airlines. Our site will let you filter for all airlines offering greater flexibility due to COVID-19.

Can I find flights from Portland, Maine to London for under $600 on Cheapflights?

Yes, there are multiple flights from Portland, Maine to London for under $600. The cheapest flight booked recently is on United Airlines for just $571, but on average you can expect to pay $611.

Are there last-minute flights available from Portland, Maine to London for under $900?

There are currently 5+ open flights from Portland, Maine to London within the next 7 days for less than $900.

What are the cheapest airlines flying from Portland, Maine to London round-trip?

Flying on United Airlines is currently your cheapest option to London, with prices starting at $571. Additional round-trip tickets that might be worth considering are offered by Delta and Air Canada, with the lowest prices starting at $590 and $602, respectively. United Airlines is 47% cheaper than the average price of flights available within the next 90 days to this destination.

What are the cheapest airlines to fly from Portland, Maine to London one-way?

To fly one-way, consider booking your trip with Air Canada, which is currently one of the cheapest options available, starting at $437. Delta flights start at $439 while deals on United Airlines start at $445 one-way.

What are the most popular routes from Portland, Maine to London?

Most travelers choose Portland - London Heathrow, Portland - London Gatwick or Portland - London City when deciding on the best route from Portland, Maine to London.

What are the cheapest flights from Portland, Maine to London?

While on average a flight from Portland, Maine to London is generally $904, our data shows the cheapest flight currently is $700. When looking at the most popular route, (Portland - London Heathrow), you can expect to pay $584 for that flight.

What are the most popular airlines that fly from Portland, Maine to London?

American Airlines, Delta and United Airlines are the most popular airlines when flying from Portland, Maine to London.

COVID Restrictions

View COVID Travel Restrictions for London, England

Do I need a COVID test to fly to London from Portland?

Information is based on travel restrictions from Portland to London

Most visitors from Portland need to provide a negative COVID-19 test result and/or quarantine to enter London.

COVID-19 testing requirements
Visitors from Portland must present a negative RT-PCR (NAAT) or Antigen (quick-test) test taken 72 hours before departing to London.

Quarantine requirements
Visitors from Portland are not required to quarantine after entering London.

Documents
Mandatory passenger locator form - Submit the form any time in the 48 hours before arriving in the UK. Show the form when checking in your plane, train or ferry to the UK.

Managed quarantine package for Scotland - All travelers arriving directly to Scotland are required to book their Managed Quarantine Package prior to travel.

COVID-19 testing package - All travelers must book and pay for a COVID-19 Testing Package prior to travel to England and Scotland.


Do I need a test to fly back to Portland from London?

Returning to Portland from London

COVID-19 testing requirements
Visitors from London must present a negative RT-PCR (NAAT) or Antigen (quick-test) test taken 72 hours before departing to Portland.

Quarantine requirements
Visitors from London are not required to quarantine after entering Portland.

Hide COVID Travel Restrictions for London, England

Destination information for London

Things to know before you go - useful duration and weather info for your trip from Portland to London.
Today's exchange rate
$1 = £0.73
Average temperature for October in London
60.8 °F
Avg rainfall for October in London
2.8 ″

Airports servicing Portland

Airports servicing London

Gatwick (LGW)
Stansted (STN)
London City (LCY)
Luton (LTN)
Southend (SEN)

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.
Airline Cheapest Average Flexibility On-time COVID-19 safety
Delta
$596 $852 No cancel fee N/A
American Airlines
$623 $927 No cancel fee 71%
United Airlines
$818 $1,759 No cancel fee 69%
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