Cheap flights from Portland to London from $205
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 10/2. 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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Icelandair flights from Portland to London Heathrow Airport
Our best Icelandair deals on Portland to London Heathrow Airport flight tickets
Iberia flights from Portland to London Heathrow Airport
Our best Iberia deals on Portland to London Heathrow Airport flight tickets
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How to get the cheapest flight ticket from Portland to London Heathrow Airport
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 Heathrow Airport?
The month of October is, on average, the cheapest month to fly to London Heathrow Airport from Portland, with most prices found around $685. If you’re not able to fly to London Heathrow Airport in October, then April is your next best option. Flight prices from Portland to London Heathrow Airport during April average around $691.
What is the cheapest day to depart on your flight to London Heathrow Airport?
Our data shows that Tuesday is the least expensive day to fly to London Heathrow Airport. Tickets to fly out on this day can be as low as $847. The most expensive day to fly to London Heathrow Airport is Saturday, with ticket prices averaging around $1,071.
What is the cheapest time of day to depart on your flight to London Heathrow Airport?
According to our data, the cheapest time of day to fly to London Heathrow Airport is in the afternoon. momondo users have found flights departing from Portland to London Heathrow Airport in the afternoon for as low as $793. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. Flights in the evening are often more expensive with an average ticket price of $951.
What is the cheapest Portland to London Heathrow flight route?
Fly from Portland to London Heathrow for the best Portland - London Heathrow flight prices
How far in advance should I book a flight to London Heathrow Airport?
You are more likely to see cheaper flights to London Heathrow Airport from Portland when booking weeks ahead of your departure date. In general, you can expect to find flights to London Heathrow Airport for around $847 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to London Heathrow Airport from Portland for as low as $756 on momondo.
What cabin class options are available on Portland to London Heathrow flights?
There are 4 cabin classes available to choose from on Portland to London Heathrow 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 Heathrow?
Icelandair and WestJet are the most popular carriers operating from Portland to London Heathrow
What airlines fly to London Heathrow Airport?
British Airways, Iberia and American Airlines are the top three most popular airlines that fly to London Heathrow Airport from Portland according to our data. British Airways is the first choice among our users, with 58% of people opting to fly with this airline when traveling to London Heathrow Airport. Keep in mind that there are 11 different airlines that fly to London Heathrow Airport on a routine basis, so you have a few additional options to choose from.
How many flights depart from Portland to London Heathrow Airport on average per day?
As of July 2025, 7 flights take off from Portland and land in London Heathrow Airport each day. The most common flight departure time for this route is 7:00PM, with 100% of daily flights taking off in the evening.
How many flights depart from Portland to London Heathrow Airport on average per week?
The number of flights available between Portland and London Heathrow Airport is 49 per week as of July 2025. The most frequent departure day is Mon, with 14% of weekly flights leaving on this day.
When to book flights from Portland to London Heathrow Airport
Cheap Portland to London Heathrow Airport (PDX to LHR) flight deals and tips
Find info about flight duration, direct flights, and airports for your flight from Portland to London Heathrow Airport
How far is Portland to London Heathrow by plane?
Portland and London Heathrow are 4902.4 mi apart from one another. Typically, this will take 12h 05m by plane in normal conditions.
When did momondo last update prices for flights from Portland Airport to London Heathrow Airport?
Prices for flights from Portland Airport to London Heathrow Airport are refreshed on a daily basis.
How many operators does momondo search for flights from Portland Airport to London Heathrow Airport?
The number of operators available for flights from Portland Airport to London Heathrow Airport is 11 as of July 2025.
How old do you have to be to fly from Portland Airport to London Heathrow Airport?
The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Portland Airport to London Heathrow Airport.
What documentation or ID do you need to fly to London Heathrow Airport?
The travel and health documents you'll need for your trip to London Heathrow Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at London Heathrow Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.
What is the most popular plane model from Portland to London Heathrow Airport?
Based on momondo bookings for this flight route, the most popular plane model on flight routes from Portland to London Heathrow Airport is Boeing 787-10 Dreamliner (71.36% of total bookings). The next most popular plane models are Boeing 787-8 Dreamliner (15.23%), Boeing 787-9 Dreamliner (6.86%), and ATR 42 / ATR 72 (1.09%).
What is the most popular airline from Portland to London Heathrow Airport?
momondo data reveals that the most frequently booked airline on the route from Portland to London Heathrow Airport is British Airways, representing 47% of all bookings. The subsequent popular airlines are Iberia at 17%, American Airlines at 10%, and Icelandair at 7%.
Best airlines flying from Portland to London Heathrow Airport
Compare and see reviews for airlines that fly from Portland to London Heathrow Airport with momondo
| Airline | Rating | Free Cancellation | Price | ||
|---|---|---|---|---|---|
| PriceFrom $491 | Free Cancellation | Rating 7.0 514 reviews | |||
| PriceFrom $580 | Free Cancellation | Rating 7.1 9,681 reviews | |||
| PriceFrom $585 | Free Cancellation | Rating 7.0 2,820 reviews | |||
| PriceFrom $602 | Free Cancellation | Rating 8.0 7,982 reviews | |||
| PriceFrom $616 | Free Cancellation | Rating 6.6 7,093 reviews | |||
| PriceFrom $617 | Free Cancellation | Rating 7.2 10,000 reviews | |||
| PriceFrom $620 | Free Cancellation | Rating 7.6 1,306 reviews | |||
| PriceFrom $621 | Free Cancellation | Rating 7.4 654 reviews | |||
| PriceFrom $645 | Free Cancellation | Rating 7.4 8,861 reviews | |||
| PriceFrom $709 | Free Cancellation | Rating 6.8 7,207 reviews |
Alaska Airlines Flights From Portland to London Heathrow Airport
Across 7 Alaska Airlines flights from Portland to London Heathrow Airport this week, the average price was $1,085, with the best Alaska Airlines deals starting from $870 round-trip. 10,000 users have rated Alaska Airlines on momondo, with an average score of 8.0/10.
Finnair Flights From Portland to London Heathrow Airport
Across 1,306 Finnair reviews on momondo, the average score is 7.6/10. Finnair flies from Portland to London Heathrow Airport about 7 times each week, with ticket deals ranging from $620 to $798. Price data is based on momondo searches in the last 72 hours.
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Book flights to London if you plan to visit one of these locationsWhy use momondo?
Why should I use momondo to find a flight deal from Portland to London?
Finding the right flight to London from Portland is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to London quick and easy, saving you time and money.
Can I find flights from Portland to London with flexible booking policies on momondo?
Yes. momondo enables you to select and highlight flights to London from Portland with this policy.
How can momondo help me find flights from Portland to London?
Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to London from Portland.
I’m not ready to book a flight from Portland to London right now. Can momondo alert me if prices change?
Of course. momondo tracks the price of Portland to London flights. All you need is a valid email address and we will do the rest; it is that quick and easy.