Cheap flights from London to Portland from £411
This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 26/8. Fares are subject to change and may not be available on all flights or dates of travel.
Cheapflights Tip: The best prices from London to Portland are usually found in March or February, booked 86 days in advance, depart on a Tuesday or Wednesday and return on a Friday
Cheap flight deals from London to Portland
Discover tips and strategies to find the most affordable flight options for your journey from London (LON) to Portland (PDX). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated 1 July 2025.
Round-trip from | £540 |
---|---|
One-way from | £411 |
Popular in | August |
Cheapest in | March |
Average price | £863 |
Good round-trip deal | £635 or less |
Good one-way deal | £615 or less |
Find flight deals from London to Portland
Cheapest flights from London to PortlandExplore the most affordable flight options available from London to Portland. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 1 July 2025.
Explore the most affordable flight options available from London to Portland. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 1 July 2025.
Cheapflights Fare Finder
Customise your flight search to find flights from London to Portland that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 858,174 searches. Data last updated 1 July 2025.
Use the filters below to find and compare flights from London to Portland that are best for you.
Fly from
Fly to
Route
Depart
Return
Price
LondonPortland
LHR - PDX
LHRPDX
London Heathrow
Tue 23/9
14:10-18:46
1 stop12h 36m
Portland
Sun 19/10
15:25-13:20
1 stop13h 55m
LondonPortland
LHR - PDX
LHRPDX
London Heathrow
Thu 25/9
09:30-20:50
2 stops19h 20m
Portland
Sat 4/10
15:50-07:25
1 stop31h 35m
LondonPortland
LGW - PDX
LGWPDX
London Gatwick
Sun 28/9
10:55-18:32
2 stops39h 37m
Portland
Fri 10/10
10:30-10:55
1 stop16h 25m
LondonPortland
LHR - PDX
LHRPDX
London Heathrow
Thu 21/8
06:50-20:03
2 stops21h 13m
Portland
Thu 11/9
10:55-09:40
1 stop14h 45m
LondonPortland
LHR - PDX
LHRPDX
London Heathrow
Wed 26/11
14:55-22:52
1 stop15h 57m
Portland
Wed 21/1
12:06-10:00
1 stop13h 54m
LondonPortland
LTN - PDX
LTNPDX
London Luton
Mon 25/8
06:05-18:57
3 stops44h 52m
Portland
Tue 9/9
06:15-15:10
2 stops24h 55m
LondonPortland
STN - PDX
STNPDX
London Stansted
Tue 9/9
08:15-23:01
3 stops22h 46m
Portland
Mon 22/9
15:20-16:05
2 stops16h 45m
LondonPortland
LHR - PDX
LHRPDX
London Heathrow
Fri 5/9
14:05-23:01
2 stops16h 56m
Portland
Sat 20/9
06:15-09:35
2 stops19h 20m
LondonPortland
LHR - PDX
LHRPDX
London Heathrow
Sun 5/10
20:55-11:20
1 stop22h 25m
Portland
Tue 24/3
06:04-10:35
1 stop21h 31m
LondonPortland
LHR - PDX
LHRPDX
London Heathrow
Mon 15/9
08:40-20:56
2 stops20h 16m
Portland
Mon 29/9
13:25-11:25
1 stop14h 00m
Best time to book a flight from London to Portland
Have a flexible travel schedule? Discover the best time to fly to Portland from London with our price prediction graph.
Cheapflights Insights
Everything you need to know about your flight from London to Portland
How far ahead should I book a flight from London to Portland?
Use this chart to determine the optimal time to book a return flight from London to Portland. Price data was last updated on 27 June 2025.
The best time to book flights from London to Portland is 86 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.
What is the cheapest month to book a flight from London to Portland?
Currently, January is the cheapest month in which you can book a flight from London to Portland (average of £736). Flying from London to Portland in July is currently the most expensive (average of £1,048). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.
What is the cheapest time of day to fly from LON to PDX?
Find hourly flight availability from London to Portland. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 1 July 2025.
When flying from London to Portland, the time of day you fly usually plays a role in the price. Save by searching for a flight in the morning, which can drop the price by up to 20% versus a flight in the afternoon.
What is the cheapest day to fly from London to Portland?
Use this chart to determine the cheapest time to fly return from London to Portland. Price data was last updated on 20 October 2024.
Travellers seeking maximum savings on their London to Portland flight should consider departing on Tuesday evenings when fares are most often at their lowest. Sunday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.
Weekly flight availability from London to Portland
Explore weekly flight availability from London to Portland. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated 1 July 2025.
The most flights from LON to PDX are scheduled on a Monday (7 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (7 on average).
How much does it cost for a return flight from London to Portland?
Reviews of airlines servicing Portland
Get insights into the airlines that provide service to Portland. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Portland. Reviews last updated 1 July 2025.
Read through reviews of airlines operating flights from London to Portland, such as Delta, Finnair, andSWISS. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Comfort
Boarding
Entertainment
Crew
Overall
Food
Reviews
Kim,May 2025
PIH - SLC
Comfort
Boarding
Entertainment
Crew
Overall
Food
Reviews
Kim,May 2025
PIH - SLC
Comfort
Boarding
Entertainment
Crew
Overall
Food
Reviews
Kim,May 2025
PIH - SLC
Comfort
Boarding
Entertainment
Crew
Overall
Food
Reviews
Kim,May 2025
PIH - SLC
Comfort
Boarding
Entertainment
Crew
Overall
Food
Reviews
Kim,May 2025
PIH - SLC
Comfort
Boarding
Entertainment
Crew
Overall
Food
Reviews
Kim,May 2025
PIH - SLC
Related info for your journey
Find useful and relevant information for your journey from London to Portland. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
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Fly from London to Portland on these airlines
Choose from the following airlines for your flight from London to Portland. Flights are based on user searches made on Cheapflights and were last updated on 1 July 2025.
Top 10 airlines flying from London to Portland
Discover the top 10 airlines that operate flights from London to Portland. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 858,174 searches. Data last updated 1 July 2025.
Fly with Cheapflights
Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.
How does Cheapflights help users find flights from London to Portland?
Cheapflights helps you search for flights from London to Portland via 900+ travel sites so you don’t have to. After performing a flight search, users can also filter their flight selection by filtering for price, number of stops, airlines, and so on.
Why should you use Cheapflights to find cheap flight tickets from London to Portland?
Cheapflights helps you find that perfect flight to Portland from London by searching from hundreds of airlines and agencies you know and love. We are also free to use, in case you were wondering!
Can Cheapflights find flights from London to Portland with no change fees?
Cheapflights does show flights with no change fees to all users. To see these options for flights from London to Portland, users can toggle the no change fees filter when performing a flight search.
Can Cheapflights notify me if prices for flights from London to Portland become cheaper?
Yes, Cheapflights offers price alerts on London to Portland flights so you can book your travel at the perfect time. Price Alerts can be enabled by clicking the bell icon next to the flight deals above and providing your email address where you want to receive the alerts.