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Flights from London to Portland

Cheapest airlines flights from London to Portland

You can pick from 1 carriers that fly from London to Portland including Norse Atlantic Airways, , , with Norse Atlantic Airways serving cheapest ticket on this route.
Norse Atlantic Airways logo Norse Atlantic Airways

Search cheap flights from London to Portland in the next 3 months. Based on Trip.com's latest 7-day data, one-way fares start at US$381, and round-trip tickets start at US$642.

      • LGW 13:00
        15h 30m
        1 stop
        PWM 23:30
        London - Portland | Mon, Jan 12 | Norse Atlantic Airways
        PWM 08:35
        16h 25m
        1 stop
        LGW 06:00
        Portland - London | Sun, Jan 18 | United Airlines
        US$642 US$848
        24% OFF
        24% OFF
        US$848 US$642
      • LHR 18:00
        20h 1m
        1 stop
        PWM 09:01
        London - Portland | Fri, Jan 16 | Lufthansa
        PWM 15:12
        10h 8m
        1 stop
        LHR 06:20
        Portland - London | Fri, Jan 23 | United Airlines
        US$726 US$848
        14% OFF
        14% OFF
        US$848 US$726
      • LHR 18:00
        20h 1m
        1 stop
        PWM 09:01
        London - Portland | Fri, Jan 16 | Austrian Airlines
        PWM 06:00
        10h 20m
        1 stop
        LHR 21:20
        Portland - London | Fri, Jan 23 | United Airlines
        US$726 US$848
        14% OFF
        14% OFF
        US$848 US$726
      • LHR 12:50
        15h 40m
        1 stop
        PWM 23:30
        London - Portland | Fri, Jan 16 | United Airlines
        PWM 06:00
        10h 20m
        1 stop
        LHR 21:20
        Portland - London | Fri, Jan 23 | United Airlines
        US$726
        14% OFF
        US$848 US$726
      • LHR 12:00
        11h 50m
        1 stop
        PWM 18:50
        London - Portland | Thu, Jan 15 | Austrian Airlines
        PWM 06:00
        10h 20m
        1 stop
        LHR 21:20
        Portland - London | Mon, Jan 19 | United Airlines
        US$728
        14% OFF
        US$848 US$728
      • LHR 12:00
        11h 50m
        1 stop
        PWM 18:50
        London - Portland | Sun, Jan 18 | Austrian Airlines
        PWM 19:27
        10h 38m
        1 stop
        LHR 11:05
        Portland - London | Sun, Jan 25 | United Airlines
        US$728
        14% OFF
        US$848 US$728
      • LHR 12:00
        11h 50m
        1 stop
        PWM 18:50
        London - Portland | Mon, Feb 2 | United Airlines
        PWM 08:40
        18h 45m
        1 stop
        LHR 08:25
        Portland - London | Mon, Feb 9 | Austrian Airlines
        US$729
        14% OFF
        US$848 US$729
      • LHR 12:50
        15h 40m
        1 stop
        PWM 23:30
        London - Portland | Tue, Jan 20 | United Airlines
        PWM 08:35
        18h 50m
        1 stop
        LHR 08:25
        Portland - London | Sun, Jan 25 | Austrian Airlines
        US$729
        14% OFF
        US$848 US$729
      • LHR 16:00
        12h 30m
        1 stop
        PWM 23:30
        London - Portland | Tue, Jan 20 | Lufthansa
        PWM 08:35
        18h 50m
        1 stop
        LHR 08:25
        Portland - London | Sun, Jan 25 | Austrian Airlines
        US$729
        14% OFF
        US$848 US$729
      • LHR 12:05
        11h 49m
        1 stop
        PWM 18:54
        London - Portland | Sat, Jan 17 | United Airlines
        PWM 06:00
        10h 20m
        1 stop
        LHR 21:20
        Portland - London | Wed, Jan 21 | United Airlines
        US$730
        14% OFF
        US$848 US$730
      • LON 13:00
        17h 25m
        1 stop
        PWM Invalid Date
        London - Portland | Mon, Dec 15 | Normal Airline
        PWM 15:00
        6h
        Nonstop
        LON 16:00
        Portland - London | Wed, Dec 17 | Normal Airline
        Find More Flights
        Find More Flights
      • LGW 13:00
        15h 30m
        1 stop
        PWM 23:30
        London - Portland | Tue, Jan 27 | Norse Atlantic Airways
        US$381 US$576
        34% OFF
        34% OFF
        US$576 US$381
      • LGW 13:00
        25h 1m
        1 stop
        PWM 09:01
        London - Portland | Mon, Feb 2 | Norse Atlantic Airways
        US$396 US$576
        31% OFF
        31% OFF
        US$576 US$396
      • LGW 13:00
        25h 1m
        1 stop
        PWM 09:01
        London - Portland | Sun, Jan 18 | Norse Atlantic Airways
        US$412 US$576
        28% OFF
        28% OFF
        US$576 US$412
      • LGW 14:00
        29h 48m
        1 stop
        PWM 14:48
        London - Portland | Fri, Feb 6 | Norse Atlantic Airways
        US$417
        28% OFF
        US$576 US$417
      • LGW 13:00
        29h 56m
        1 stop
        PWM 13:56
        London - Portland | Tue, Jan 13 | Norse Atlantic Airways
        US$421
        27% OFF
        US$576 US$421
      • LGW 13:00
        15h 30m
        1 stop
        PWM 23:30
        London - Portland | Mon, Jan 19 | Norse Atlantic Airways
        US$444
        23% OFF
        US$576 US$444
      • LGW 13:00
        15h 30m
        1 stop
        PWM 23:30
        London - Portland | Sun, Jan 25 | Norse Atlantic Airways
        US$469
        19% OFF
        US$576 US$469
      • LGW 14:00
        29h 48m
        1 stop
        PWM 14:48
        London - Portland | Fri, Jan 9 | Norse Atlantic Airways
        US$487
        15% OFF
        US$576 US$487
      • LHR 08:05
        20h 25m
        1 stop
        PWM 23:30
        London - Portland | Mon, Feb 2 | Jetblue Airways
        US$488
        15% OFF
        US$576 US$488
      • LHR 07:25
        21h 5m
        1 stop
        PWM 23:30
        London - Portland | Tue, Jan 27 | Jetblue Airways
        US$495
        14% OFF
        US$576 US$495
      • LON 13:00
        17h 25m
        1 stop
        PWM Invalid Date
        London - Portland | Mon, Dec 15 | Normal Airline
        Find More Flights
        Find More Flights

Displayed flight fares from London to Portland are based on average prices across airlines for the next 3 months, according to the latest Trip.com database.

London to Portland Flight Details

The distance between London and Portland is about 5,130.81 km. Based on Trip.com's latest data, travel demand is highest in July. The off-season for travel is September.

Cheapest one-way flight priceUS$381
Cheapest return ticket priceUS$642
Cheapest monthSeptember
Peak season for travelJuly
Flight distance5,130.81 km
Popular airlineNorse Atlantic Airways

When is the cheapest time to book flights from London to Portland?

The cheapest time to fly from London to Portland: Feb 1 to Feb 8 — one-way prices start at US$339.

Cheapest flights
From price
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  • 2128

  • Jan

    284
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  • 1825

  • Feb

    251
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    221
Displayed prices are calculated based on the cheapest average weekly prices of the corresponding route on Trip.com.

Frequently Asked Questions

  • What are the cheapest flights from London to Portland (LON-PWM)?

    Based on Trip.com data, Norse Atlantic Airways offers one-way fares as low as US$381 on Cheapest nonstop routes (e.g. LGW to PWM on Tue, Jan 27), while Norse Atlantic Airways offers Cheapest nonstop round-trips from US$642 departing on Mon, Jan 12 and returning on Sun, Jan 18.
  • By analyzing data from all airlines on the Trip.com flight calendar, it looks like the best time to book a flight from London to Portland is around 40 days (6 weeks) in advance, and the best time to fly is usually on Tuesday, Wednesday, and Saturday. Tuesday typically offers the cheapest flights for departure, while Saturday offers the best return deals.
  • To find best deals on flights from London to Portland, you can use various tools on Trip.com:
    · Be flexible with your travel dates to get the cheapest flight deal. Now the cheapest flight deal is on Tue, Jan 27, with one-way flights priced at just US$381.
    · Compare airlines strategically. Budget carriers often provide the lowest base fares, while we found the most affordable airline currently operating on this route is Norse Atlantic Airways.
    · Set up price alerts to easily monitor ticket prices without having to check every day.
    · Check Trip.com flight deals and promo codes frequently.
    · Avoid peak season unless you book very early. It seems the peak season for Portland travel is around July.
    · Get exclusive promo codes for Trip.com app users.
  • The cheapest months to fly from London to Portland is September, when demand for travel is lower.
  • After crunching the numbers on our December flight calendar, it's currently cheapest to fly from London to Portland on December 25, 2025 with Jetblue Airways, with prices starting at US$601.
  • The time difference between Portland and London is 5h.
  • Tickets can only be changed or canceled if permitted by airline policy. To submit a change or cancellation request, go to the flight bookings page, select the option to change or cancel your booking, choose the relevant passengers and segment, and submit a request. Please note that additional charges may apply according to the airline ticket policy. However, if the flight has been rescheduled and you would like to change or cancel your ticket, you can submit an involuntary cancellation request. For more details about change and cancellation policies, please check the customer support pages.

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