PWM - LON

$331 Find Cheap Flights from Portland to London - Compare and Save

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Everything you should know

Cheapest round-trip
$749
Typical prices: $738-$1,073
United Airlines
Thu 3/15Sat 3/17
PWM - LHR • 2 stops
Cheapest one-way
$331
Typical prices: $350-$597
JetBlue
Thu 11/8
PWM - LHR • 1 stop
Nonstop flights
Not available
There are currently no direct flights between Portland and London. You'll need to take a connecting flight to reach the destination.
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Top routes
PWM - LCY
Cheapest • 13% average savings
PWM - LHR
Most popular
Insights
Insights
When to travel
December
Cheapest • 19% price drop
May
Most popular
Good to know
+1
Good to know
+1
Top layover airports
Philadelphia (PHL)
Cheapest • Avg $965 (round-trip)
Newark (EWR)
Shortest trip • 10h 49m (one-way)
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We hope you love your trip to London!
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Flight Deals

Cheap Flights from Portland to London (PWM-LON)

 
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Portland to London

Mon, Mar 15 - Wed, Mar 17
United Airlines Logo
3:15 pm - 1:00 pmPWM  Portland-LHR London Heathrow
17h 45m2 stops Newark Zurich
United Airlines Logo
1:00 pm - 1:38 pmLHR  London Heathrow-PWM Portland
28h 38m2 stops Montreal Pierre Elliott Trudeau Intl Newark
$749United Airlines
Mon, Mar 15 - Wed, Mar 17
United Airlines Logo
3:15 pm - 9:10 amPWM  Portland-LHR London Heathrow
13h 55m1 stop Newark
United Airlines Logo
6:50 am - 6:13 pmLHR  London Heathrow-PWM Portland
15h 23m2 stops Brussels Bruxelles-National Newark
$751United Airlines
Mon, Nov 16 - Wed, Nov 18
United Airlines Logo
3:41 pm - 4:20 pmPWM  Portland-LHR London Heathrow
19h 39m2 stops Newark Zurich
United Airlines Logo
9:00 am - 11:21 pmLHR  London Heathrow-PWM Portland
43h 21m2 stops Halifax Intl Newark
$758United Airlines
Mon, Nov 16 - Wed, Nov 18
United Airlines Logo
2:05 pm - 10:50 amPWM  Portland-LHR London Heathrow
15h 45m1 stop Washington, D.C. Dulles Intl
United Airlines Logo
9:00 am - 11:21 pmLHR  London Heathrow-PWM Portland
19h 21m2 stops Zurich Newark
$759United Airlines
Mon, Nov 9 - Thu, Nov 12
United Airlines Logo
5:08 pm - 7:55 amPWM  Portland-LHR London Heathrow
33h 47m1 stop Chicago O'Hare Intl
United Airlines Logo
6:50 am - 7:02 pmLHR  London Heathrow-PWM Portland
17h 12m2 stops Brussels Bruxelles-National Washington, D.C. Dulles Intl
$765United Airlines
Mon, Nov 16 - Wed, Nov 18
United Airlines Logo
3:41 pm - 11:15 amPWM  Portland-LHR London Heathrow
14h 34m2 stops Newark Zurich
United Airlines Logo
8:00 am - 7:02 pmLHR  London Heathrow-PWM Portland
16h 02m2 stops Newark Washington, D.C. Dulles Intl
$786United Airlines
Mon, Nov 16 - Wed, Nov 18
United Airlines Logo
3:41 pm - 10:05 amPWM  Portland-LHR London Heathrow
13h 24m2 stops Newark Brussels Bruxelles-National
United Airlines Logo
9:10 am - 9:51 pmLHR  London Heathrow-PWM Portland
17h 41m2 stops Newark Chicago O'Hare Intl
$786United Airlines
Fri, Nov 20 - Mon, Nov 23
United Airlines Logo
5:50 am - 7:10 amPWM  Portland-LHR London Heathrow
44h 20m2 stops Newark Montreal Pierre Elliott Trudeau Intl
United Airlines Logo
6:50 am - 11:21 pmLHR  London Heathrow-PWM Portland
21h 31m2 stops Brussels Bruxelles-National Newark
$801United Airlines
Mon, Nov 9 - Thu, Nov 12
JetBlue Logo
6:30 am - 9:40 pmPWM  Portland-LHR London Heathrow
10h 10m1 stop New York John F Kennedy Intl
JetBlue Logo
7:25 am - 11:43 pmLHR  London Heathrow-PWM Portland
21h 18m1 stop New York John F Kennedy Intl
$827JetBlue
Sat, Nov 7 - Sat, Nov 14
JetBlue Logo
6:30 am - 9:40 pmPWM  Portland-LHR London Heathrow
10h 10m1 stop New York John F Kennedy Intl
JetBlue Logo
8:05 am - 11:43 pmLHR  London Heathrow-PWM Portland
20h 38m1 stop New York John F Kennedy Intl
$827JetBlue
Booking Insights

Price, demand and travel trends for Portland to London flights

Use KAYAK data on prices, travel dates, airlines and seasonal trends to compare options and book flights with more confidence.

How much is a round-trip flight from Portland to London?

Round-trip flights from Portland to London typically range from $738 to $1,073. The lowest price found in the past 5 days was $749, on United Airlines.

What is the cheapest Portland to London flight route?

Portland (PWM) to London City Airport (LCY) is the cheapest Portland to London route, averaging $664 round-trip. Other Portland to London routes average $859, based on KAYAK data over the past 12 months.

What's the cheapest day of the week to fly from Portland to London?

Based on deals KAYAK users found in the last 12 months, Sunday is the cheapest day of the week to fly from Portland to London. It’s 8% cheaper than the average day, while Friday is the most expensive, with prices 77% higher.

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Key details for Portland to London flights

Low season

February

Cheapest flight

$331
Beat the crowds with an average 75% drop in travelers.
The most popular month to fly with an average 45% increase in travelers.
One-way flight from Portland to London Heathrow Airport

When to book flights from Portland to London

Are your dates flexible? Find out the best times to travel from Portland to London based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price

Your Portland to London flight questions, answered

Find helpful answers about this route, including flight times, airports, airlines and booking tips.

  • What cabin classes can I book on flights from Portland to London?

    Two cabin classes are available on flights from Portland to London:

    • Economy Class
    • First Class

  • How long is a flight from Portland to London?

    A nonstop flight from Portland to London takes 00m, covering 3,186 miles.

  • Do I need a passport to fly from Portland to London?

    Yes, a valid passport is required for this international route. Many destinations require at least six months of validity beyond your travel dates. Check your passport expiry well before booking.

  • How much should I expect to pay for a Portland to London flight?

    Round-trip flights from Portland to London range from $738 to $1,073, with an average of $859 over the past 12 months. Anything below $738 counts as a good deal.

  • How are flight prices from Portland to London looking right now?

    One-way fares from Portland to London are currently lower than usual. Average one-way flight prices are about $398, which is 19% below the typical average for this route.

  • What car rental options are available in London?

    Since London is served by multiple airports, car rental options and rates can vary depending on which one you fly into.
    Near London Heathrow Airport (LHR) — daily rates from around $7:

    • GREEN MOTION
    • DRIVALIA
    • Europcar
    • Alamo
    • Hertz

    Near London Gatwick Airport (LGW) — daily rates from around $7:

    • GREEN MOTION
    • DRIVALIA
    • U-Save
    • Europcar
    • Alamo

    Near London City Airport (LCY) — daily rates from around $10:

    • GREEN MOTION
    • Budget
    • Hertz
    • Avis
    • Sixt

    Near London Stansted Airport (STN) — daily rates from around $10:

    • GREEN MOTION
    • DRIVALIA
    • Europcar
    • Alamo
    • U-Save

    Near London Luton Airport (LTN) — daily rates from around $11:

    • GREEN MOTION
    • DRIVALIA
    • Alamo
    • Europcar
    • U-Save

  • Which airports can I use when flying from Portland to London?

    Flights from Portland to London usually depart from Portland (PWM) and may arrive at several airports in London area, including London City (LCY), London Gatwick (LGW), London Heathrow (LHR), London Luton (LTN), London Southend (SEN) and London Stansted (STN).

  • Which airports do connecting flights from Portland to London pass through?

    One-stop flights from Portland to London most commonly connect through:

    • Newark (EWR) - 47% of one-stop connections
    • Philadelphia (PHL) - 24% of one-stop connections
    • New York John F Kennedy Intl (JFK) - 22% of one-stop connections
    • Atlanta Hartsfield-Jackson (ATL) - 4% of one-stop connections

  • Can I save money by using flexible dates for flights from Portland to London?

    Yes. Flexible dates can save you up to 48% on flights from Portland to London. Sunday is the cheapest departure day at $796 round-trip on average, while Friday is the most expensive at $1,528, a difference of $732.

    Cheaper weekend fares like these are typical of routes dominated by weekday business travel.

  • How much time can I save by choosing a different layover airport from Portland to London?

    Flying via Newark (EWR) gives the shortest average 1-stop total travel time at 10h 49m, compared with 11h 15m via Philadelphia (PHL) and 12h 26m via Chicago O'Hare Intl (ORD).

  • What is the time difference between Portland and London?

    London is 5 hours ahead of Portland (British Time vs Eastern Time). Plan for the time shift when scheduling connections or first-day activities.

  • What popular places can I visit in London?

    Some of the most popular sights in London are Hyde Park and Buckingham Palace. These are among the most viewed places in London on KAYAK.

Your guide to booking Portland to London flights

Get tips on when to book, when to fly and what to know before your trip.
  • If your dates are flexible, aim for a Sunday departure and avoid flying on Friday. On this route, Sunday flights average $796, about $732 less than Friday fares (48% savings) based on the last 12 months.
  • If you can choose when to travel, plan your Portland to London trip for December. Fares historically average $700 round-trip in that month - typically $595 less than the most expensive month, which is July (based on the last 12 months).
  • If you're arriving late at night and need somewhere to stay, hotels close to the airport you're flying into can be a convenient option.

    Near London City Airport

    • Good Hotel London
    • Novotel London Excel
    • Aloft London Excel

    Near London Heathrow Airport

    • Hilton London Heathrow Airport

    Near London Gatwick Airport

    • Premier Inn London Gatwick Airport

More options for your flight from Portland to London

Complete your trip to London with a hotel stay or car rental

Car rentals in London
Hotels in London
Vacations in London