PWM - LHR

£249 Find Cheap Flights from Portland to London – Compare and Save

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Everything you should know

Cheapest return flight
£562
Typical prices: £560-£805
United Airlines
Thu 15/3Sat 17/3
PWM - LHR • 2 stops
Cheapest one-way flight
£249
Typical prices: £248-£448
JetBlue
Thu 8/11
PWM - LHR • 1 stop
Direct flights
Not available
There are currently no direct flights between Portland and London Heathrow Airport. You'll need to take a connecting flight to reach the destination.
Insights
Insights
When to travel
December
Cheapest • 19% price drop
May
Most popular
Good to know
+1
Good to know
+1
Top stopover airports
Philadelphia (PHL)
Cheapest • Avg £724 (return)
Newark (EWR)
Shortest trip • 10h 49m (one-way)
Insights
Insights
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We hope you enjoy your trip to London Heathrow Airport!
Flight Deals
Booking Insights
Flight Deals

Cheap Flights from Portland to Heathrow (PWM-LHR)

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

Recent return flight deals from Portland to Heathrow

Mon, 15 Mar - Wed, 17 Mar
United Airlines Logo
15:15 - 13:00PWM  Portland-LHR London Heathrow
17h 45m2 stops Newark Zurich
United Airlines Logo
13:00 - 13:38LHR  London Heathrow-PWM Portland
28h 38m2 stops Montreal Pierre Elliott Trudeau Intl Newark
£562United Airlines
Mon, 15 Mar - Wed, 17 Mar
United Airlines Logo
15:15 - 09:10PWM  Portland-LHR London Heathrow
13h 55m1 stop Newark
United Airlines Logo
06:50 - 18:13LHR  London Heathrow-PWM Portland
15h 23m2 stops Brussels Bruxelles-National Newark
£564United Airlines
Mon, 16 Nov - Wed, 18 Nov
United Airlines Logo
14:05 - 10:50PWM  Portland-LHR London Heathrow
15h 45m1 stop Washington, D.C. Dulles Intl
United Airlines Logo
09:00 - 23:21LHR  London Heathrow-PWM Portland
19h 21m2 stops Zurich Newark
£570United Airlines
Mon, 9 Nov - Thu, 12 Nov
United Airlines Logo
17:08 - 07:55PWM  Portland-LHR London Heathrow
33h 47m1 stop Chicago O'Hare Intl
United Airlines Logo
06:50 - 19:02LHR  London Heathrow-PWM Portland
17h 12m2 stops Brussels Bruxelles-National Washington, D.C. Dulles Intl
£574United Airlines
Mon, 16 Nov - Wed, 18 Nov
United Airlines Logo
15:41 - 11:15PWM  Portland-LHR London Heathrow
14h 34m2 stops Newark Zurich
United Airlines Logo
08:00 - 19:02LHR  London Heathrow-PWM Portland
16h 02m2 stops Newark Washington, D.C. Dulles Intl
£590United Airlines
Sat, 7 Nov - Sat, 14 Nov
JetBlue Logo
06:30 - 21:40PWM  Portland-LHR London Heathrow
10h 10m1 stop New York John F Kennedy Intl
JetBlue Logo
08:05 - 23:43LHR  London Heathrow-PWM Portland
20h 38m1 stop New York John F Kennedy Intl
£621JetBlue
Mon, 16 Nov - Wed, 18 Nov
JetBlue Logo
06:30 - 21:40PWM  Portland-LHR London Heathrow
10h 10m1 stop New York John F Kennedy Intl
JetBlue Logo
12:20 - 23:43LHR  London Heathrow-PWM Portland
16h 23m1 stop New York John F Kennedy Intl
£625JetBlue
Sat, 7 Nov - Sat, 14 Nov
United Airlines Logo
14:05 - 06:40PWM  Portland-LHR London Heathrow
11h 35m1 stop Washington, D.C. Dulles Intl
United Airlines Logo
12:05 - 23:21LHR  London Heathrow-PWM Portland
16h 16m2 stops Zurich Newark
£648United Airlines
Sat, 28 Nov - Thu, 3 Dec
United Airlines Logo
06:00 - 21:20PWM  Portland-LHR London Heathrow
10h 20m1 stop Newark
United Airlines Logo
06:50 - 19:12LHR  London Heathrow-PWM Portland
17h 22m2 stops Brussels Bruxelles-National Washington, D.C. Dulles Intl
£649United Airlines
Sat, 14 Nov - Sat, 21 Nov
United Airlines Logo
10:50 - 07:10PWM  Portland-LHR London Heathrow
15h 20m2 stops Newark Montreal Pierre Elliott Trudeau Intl
United Airlines Logo
12:05 - 23:21LHR  London Heathrow-PWM Portland
16h 16m2 stops Zurich Newark
£650United Airlines
Booking Insights

Price, demand, and travel trends for Portland to London Heathrow Airport 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 return flight from Portland to London Heathrow Airport?

Return flights from Portland to London Heathrow Airport typically range from £560 to £805. The lowest price found in the past 5 days was £562 on United Airlines.

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

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 Heathrow Airport. 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 Heathrow Airport flights

Low season

February

Cheapest flight

£249
Beat the crowds with an average 74% drop in traveller numbers.
The most popular month to fly with an average 48% increase in traveller numbers.
One-way flight from Portland to London Heathrow Airport

When to book flights from Portland to Heathrow

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

Your Portland to London Heathrow Airport flight questions, answered

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

  • Which cabin classes can I book on flights from Portland to London Heathrow Airport?

    Only Economy class is available on flights from Portland to London Heathrow Airport.

  • How long is a flight from Portland to London Heathrow Airport?

    A direct flight from Portland to London Heathrow Airport takes 00m, covering 3,173 miles.

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

    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 Heathrow Airport flight?

    Return flights from Portland to London Heathrow Airport range from £560 to £805, with an average of £645 over the past 12 months. Anything below £560 counts as a good deal.

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

    One-way fares from Portland to London Heathrow Airport are currently higher than usual. Average one-way flight prices are about £1,352, which is 284% above the typical average for this route.

  • Which car hire options are available at London Heathrow Airport (LHR)?

    London Heathrow Airport (LHR) hosts 5 major car hire companies, with daily rates starting from around £5 for economy cars. Top options include:

    • GREEN MOTION
    • DRIVALIA
    • Europcar
    • Alamo
    • Hertz

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

    Flights from Portland to London Heathrow Airport usually depart from Portland (PWM) and arrive at London Heathrow (LHR).

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

    One-stop flights from Portland to London Heathrow Airport 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 Heathrow Airport?

    Yes. Flexible dates can save you up to 48% on flights from Portland to London Heathrow Airport. Sunday is the cheapest departure day at £598 return on average, while Friday is the most expensive at £1,147, a difference of £550.

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

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

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

  • What is the time difference between Portland and London Heathrow Airport?

    London Heathrow Airport 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 Heathrow Airport?

    Some of the most popular sights in London Heathrow Airport are Hyde Park, Tower Bridge, and Royal Albert Hall. These are among the most viewed places in London Heathrow Airport on KAYAK.

Your guide to booking Portland to London Heathrow Airport 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 £598, about £550 less than Friday fares (48% savings) based on the last 12 months.
  • If you can choose when to travel, plan your Portland to London Heathrow Airport trip for December. Fares historically average £526 return in that month – typically £447 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, check out these hotels close to London Heathrow Airport.

    • Hilton London Heathrow Airport

More options for your flight from Portland to Heathrow

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

Car hire in London
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