Cheap flights from Portland to London from £162
This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Portland to London departing on 3/8. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Delta flights from Portland to London
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United Airlines flights from Portland to London
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How to get the cheapest flight ticket from Portland to London
Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip
What is the cheapest month to fly to London?
The cheapest month to fly to London from Portland is in October. Flight prices, which tend to average around £501, are often lower during this time because this is during the off-season. The month of November is another great option to travel to London, with average flight prices from Portland averaging around £502.
What is the cheapest day to depart on your flight to London?
Our data shows that Friday is the least expensive day to fly to London. Tickets to fly out on this day can be as low as £457. When flying out on a Saturday, the most expensive travel day of the week, you can expect to see flight prices from Portland to London for around £781.
What is the cheapest time of day to depart on your flight to London?
The cheapest time of day to fly to London is in the evening when flights can be purchased for as low as £524. Flights at midday are often more expensive, with an average ticket price of £689.
What is the cheapest Portland to London flight route?
Fly from Portland to London Heathrow for the best Portland - London flight prices
How far in advance should I book a flight to London?
You are more likely to see cheaper flights to London from Portland when booking 19 weeks ahead of your departure date. In general, you can expect to find flights to London for around £630 when searching 19 weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to London from Portland for as low as £562 on momondo.
What cabin class options are available on Portland to London flights?
There are 3 cabin classes available to choose from on Portland to London flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.
What is the cheapest airline that flies from Portland to London?
Icelandair and JetBlue are the most popular carriers operating from Portland to London
Which airlines fly to London?
British Airways, Iberia and Virgin Atlantic are the top three most popular airlines that fly to London from Portland according to our data. British Airways is the first choice among our users, with 52% of people opting to fly with this airline when travelling to London. Keep in mind that there are 3 different airlines that fly to London on a routine basis, so you have a few additional options to choose from.
How many flights depart from Portland to London on average per day?
As of June 2025, 7 flights take off from Portland and land in London each day. The most common flight departure time for this route is 19:00, with 100% of daily flights taking off in the evening.
How many flights depart from Portland to London on average per week?
As of June 2025, 49 flights take off from Portland and land in London each week. The most common flight departure day for this route is Mon, with 14% of weekly flights taking off on this day.
When to book flights from Portland to London
Cheap Portland to London (PDX to LON) flight deals and tips
Find info about flight duration, direct flights, and airports for your flight from Portland to London
How far is Portland to London by plane?
The straight-line distance from Portland to London is 4909.8 mi. A reasonable flight in good conditions will take 9h 35m.
When did momondo last update prices for flights from Portland Airport to London?
Prices for flights from Portland Airport to London refresh daily.
How many operators does momondo search for flights from Portland Airport to London?
As of June 2025, there are 3 operators available to choose from for flights from Portland Airport to London.
How old do you have to be to fly from Portland Airport to London?
The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Portland Airport to London.
What documentation or ID do you need to fly to London?
The necessary travel and health documents for your London trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.
What is the most popular plane model from Portland to London?
Based on momondo bookings for this flight route, the most popular plane model on flight routes from Portland to London is Boeing 787-10 Dreamliner (74.23% of total bookings). The next most popular plane models are Boeing 787-8 Dreamliner (13.59%), Boeing 787-9 Dreamliner (6.27%), and ATR 42 / ATR 72 (1.01%).
What is the most popular airline from Portland to London?
Based on momondo bookings for this flight route, the most popular airline on flight routes from Portland to London is British Airways (62% of total bookings). The next most popular airline is Iberia (38%).
Best airlines flying from Portland to London
Compare and see reviews for airlines that fly from Portland to London with momondo
| Airline | Rating | Free Cancellation | Price | ||
|---|---|---|---|---|---|
| PriceFrom £431 | Free Cancellation | Rating 7.4 653 reviews | |||
| PriceFrom £453 | Free Cancellation | Rating 7.0 2,794 reviews | |||
| PriceFrom £466 | Free Cancellation | Rating 6.6 7,056 reviews |
Iberia Flights From Portland to London
Iberia is one of the most popular airlines flying from Portland to London, operating 7 flights/week on average for this route. A good Iberia flight deal for Portland to London starts from £609 round-trip, up to an average price of £733. Our users have rated Iberia at 7.0/10.
British Airways Flights From Portland to London
The best British Airways deal for Portland to London flight tickets found on momondo in the last 72 hours was £627, round-trip. It should be noted that an average British Airways flight deal for this route in this time was higher, at £723 round-trip. British Airways operates 7 flights out of Portland into London in an average week, so prices vary by time and availability. 7,056 British Airways reviews by users on momondo have scored the airline at 6.6/10.
Travelling to a place near London?
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Why should I use momondo to find a flight deal from Portland to London?
To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to London from Portland.
Can I find flights from Portland to London with flexible booking policies on momondo?
Flights from Portland to London with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.
How can momondo help me find flights from Portland to London?
momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from Portland to London.
I’m not ready to book a flight from Portland to London right now. Can momondo alert me if prices change?
Yes momondo offers price alerts on flights to London from Portland. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.