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PWM - LON

$488 Find cheap flights from Portland to London

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Portland to London departing on 9/3. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
0 bags
Thu 7/4
Thu 7/11

Search hundreds of travel sites at once for deals on flights to London

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Portland to London, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Portland to London, as well as popular online travel agencies
In the last 7 days travelers have searched 44,060,346 times on KAYAK, and here is why:

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Cheap flight deals from Portland to London (PWM-LON)

 
These are the cheapest deals for flights from Portland to London currently on KAYAK along with options from the most popular airlines KAYAK users selected for this route. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.

Recent round-trip flight deals from Portland to London

Recommended round-trip deals departing in the coming months from the most popular airlines that fly from Portland to London.

Recent one-way flight deals from Portland to London

Only flying one-way? Below are some of the best one-way flight deals from Portland to London found on KAYAK recently.

Recent last minute flight deals from Portland to London

Leaving soon but still want a bargain? Check out these latest deals for last minute flights from Portland to London.

Recent direct flight deals from Portland to London

The latest deals for direct flights from Portland to London so you can sit back and relax without the need for a layover.

Cheap bus & train deals from Portland to London

Find recent round-trip train or bus tickets from Portland to London.

All round-trip flight deals to London

The cheapest plane tickets to London found on KAYAK recently.
Discover the best prices and deals for you by selecting your travel dates.
Choose your dates
4:45 pm - 8:25 amPWM-LHR
11h 40m1 stop
8:50 am - 11:48 pmLHR-PWM
19h 58m2 stops
$634United Airlines
Find Deal
Mon, Oct 28 - Thu, Nov 7
6:00 am - 6:30 amPWM-LHR
20h 30m2 stops
6:00 pm - 11:11 pmLHR-PWM
34h 11m2 stops
$637Air Canada
Find Deal
Mon, Oct 28 - Thu, Nov 7
1:40 pm - 11:10 amPWM-LHR
17h 30m1 stop
10:10 am - 11:38 pmLHR-PWM
18h 28m1 stop
$647KLM
Find Deal
Mon, Oct 28 - Thu, Nov 7
1:06 pm - 7:55 amPWM-LGW
13h 49m1 stop
10:30 am - 9:29 pmLGW-PWM
15h 59m1 stop
$657JetBlue
Find Deal
Thu, Sep 26 - Tue, Oct 1
2:52 pm - 10:00 amPWM-LGW
14h 08m1 stop
12:00 pm - 11:26 pmLGW-PWM
16h 26m2 stops
$665Delta
Find Deal
Thu, Sep 26 - Tue, Oct 1
12:47 pm - 6:40 amPWM-LHR
12h 53m1 stop
9:50 am - 9:15 pmLHR-PWM
16h 25m2 stops
$666American Airlines
Find Deal
Thu, Sep 26 - Tue, Oct 1
4:17 pm - 10:20 amPWM-LHR
13h 03m2 stops
9:50 am - 9:15 pmLHR-PWM
16h 25m2 stops
$669American Airlines
Find Deal
Thu, Sep 26 - Tue, Oct 1
1:06 pm - 9:30 amPWM-LHR
15h 24m1 stop
11:55 am - 9:29 pmLHR-PWM
14h 34m1 stop
$693JetBlue
Find Deal
Thu, Sep 26 - Tue, Oct 1
2:09 pm - 8:05 amPWM-LHR
12h 56m1 stop
11:35 am - 10:00 pmLHR-PWM
15h 25m1 stop
$818KLM
Find Deal
Thu, Aug 22 - Mon, Aug 26
2:09 pm - 10:00 amPWM-LGW
14h 51m1 stop
12:00 pm - 12:10 amLGW-PWM
17h 10m1 stop
$904Delta
Find Deal
Mon, Aug 5 - Mon, Aug 12
9:55 am - 8:40 amPWM-LHR
17h 45m2 stops
Tue, Sep 3
12:10 pm - 10:50 amPWM-LHR
17h 40m1 stop
$508American Airlines
Find Deal
Tue, Sep 3
9:49 am - 9:00 amPWM-LGW
42h 11m3 stops
Fri, Jun 28
9:55 am - 3:35 pmPWM-LGW
24h 40m2 stops
$573TAP AIR PORTUGAL
Find Deal
Tue, Sep 3
9:49 am - 10:00 amPWM-LGW
19h 11m1 stop
Fri, Jun 28
12:28 pm - 10:00 amPWM-LHR
16h 32m2 stops
$628Air Canada
Find Deal
Thu, Sep 12
6:05 am - 9:00 amPWM-LHR
21h 55m1 stop
$675United Airlines
Find Deal
Fri, Jun 28
10:54 am - 8:35 amPWM-LGW
16h 41m1 stop
Thu, Sep 12
2:32 pm - 11:40 amPWM-LCY
16h 08m2 stops
$838United Airlines
Find Deal
Fri, Jun 28
2:08 pm - 8:50 amPWM-LCY
13h 42m2 stops
$992Delta
Find Deal
Fri, Jun 28

Flights from Portland to London - Travel Insights & Trends

Get data-powered insights and trends into flights from Portland to London to help you find the cheapest flights, the best time to fly and much more.

What is the cheapest month to fly from Portland to London?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for flights from Portland to London, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.
The cheapest month for flights from Portland to London is March, where tickets cost $686 on average. On the other hand, the most expensive months are June and July, where the average cost of tickets is $3,871 and $1,212 respectively.

Which airlines provide the cheapest flights from Portland to London?

The cheapest price for the route for each airline clicked by KAYAK users in the last 72 hours.
In the last 3 days, American Airlines offered the best one-way deal for that route, at $508. KAYAK users also found Portland to London round-trip flights on United Airlines from $634 and on Air Canada from $637.

Good to know

Low season

November

High season

October

Cheapest flight

$488
Best time to beat the crowds with an average 4% drop in price.
Most popular time to fly and prices are also 23% lower on average.
Flight from Portland to London Heathrow Airport

When to book flights from Portland to London

Are your dates flexible? Find out the best times to travel from Portland to London based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from Portland to London

  • What is the cheapest flight from Portland to London?

    In the last 3 days, the lowest price for a flight from Portland to London was $488 for a one-way ticket and $634 for a round-trip.

  • Do I need a passport to fly between Portland and London?

    Yes

  • Which aircraft models fly most regularly from Portland to London?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from Portland to London?

    oneworld, Star Alliance, and SkyTeam are the airline alliances operating flights between Portland and London, with Star Alliance being the most commonly used for this route.

  • Which is the best airline for flights from Portland to London, Delta or JetBlue?

    The two airlines most popular with KAYAK users for flights from Portland to London are Delta and JetBlue. With an average price for the route of $769 and an overall rating of 8.0, Delta is the most popular choice. JetBlue is also a great choice for the route, with an average price of $919 and an overall rating of 7.6.

  • How does KAYAK find such low prices on flights from Portland to London?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Portland to London.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Portland to London?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to London from Portland is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Portland to London?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to London with an airline and back to Portland with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Portland to London?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to London from Portland up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

See more FAQs

Top 4 airlines serving from Portland to London

 
See real verified KAYAK customer reviews for airlines flying from Portland to London. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Portland to London? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
8.0
DeltaOverall score based on 10392 reviews
7.4Food
8.6Crew
8.0Entertainment
7.9Comfort
8.2Boarding
Airline reviews

It was good until there was a 3 hour delay because there was not any pilots to fly the plane.

2.0 MediocreFelipe, Jun 2024DTW - SAN
Read more about Delta reviews

It was good until there was a 3 hour delay because there was not any pilots to fly the plane.

There was plenty of overhead room but half of the passengers were told they had to check their carryon bags. My partner and I checked in as early as possible and our seats were split across the aisle.

Friendly flight attendants. Comfort plus seats were very comfortable and had lots of leg room. 10A and 10 B.

I've flown many many times on Northwest and then Delta. The crew on this flight were absolutely the best I've had the pleasure of being looked after by.

Flew first class so everything was great. But maybe because the flights were red eye, no meals were served, just chips. I flew Alaska Air 1st class at 9PM (2 hour flight) and they served beef short rib sliders!

Had to change aircraft due to a faulty door. Surprisingly it only caused about an hour and a half of delay. Delta handled this situation as well as can be expected.

Awful. Flight was continuously getting delayed and gates kept changing without any reason. Flight was delayed for more then 3 hours

Paid premium for Delta only to be on safe but tired old 767 with ancient cabin in mediocre condition. Poor wifi and horrible inflight entertainment. Hardly a premium experience. Should have flown SW and had fun flight crew and no pretense

Our flight to Zurich was delayed by almost 3 hours, so we missed our next flight. There was no indication it would be delayed this much. We were told the gate had changed and then it apparently took over 2 hours to load the "catering" on the plane. We were not compensated in any way for the trouble.

Rated entertainment as Mediocre as there were major problems with the Infotainment system that took probably a half hour for them to fix.

The walk from baggage claim to the taxi is very difficult for older people I will never fly into JFK again. It is physically challenging

Overall fine but both ways for this trip was delayed.

Flight was delayed by almost 5 hours. Suitcase was not loaded despite the flight being near empty (my colleagues’ suitcases did reach JFK, unlike mine). Had to argue on phone to get JetBlue to deliver the case to my hotel. Never again

The flight was excellent. The crew was welcoming and attentive.

Great! I love Jet Blue. My favorite airline! Very efficient, clean and timely.

Run out of snack choices. Why are the seats not padded for your butt? Are we sitting on blocks of wood or metal for $250-300 a pop? This ain’t spirit. Let’s get it together people

We were told that our flight would be delayed for 90+ minutes because of weather, so we went to get something to eat only to have them randomly start boarding 15 minutes after the announcement, with no warning.

Entertainment... No earphones passed out. Many including me couldn't use the TV. Legroom was good. Crew was indifferent and a bit surly. Free wifi was a nice convenience. Check in desk location was unknown. Gate number on the boarding passes was wrong.

Going through JFK’s security is a mess. The TSA security said no shoes on the bins. So, we place our shoes in the belt and they came out all over the belt. Boarding was delayed and Flight as well.

Safe and on time were the positives. The plane wasn't cleaned before boarding, there was garbage and food on the floor and in the seat pocket. The TV screen was small and the picture fuzzy, audio quality was poor. Seatbelt was fraying and seat did not recline properly. No charging ports near the seats,

My window shade didn’t work. So I missed coming into my city. ☹️

Flight was delayed in the gate by 5 hours and ultimately cancelled- rebooking service by United agents was terrible

Everything was pretty good except for food. They need to improve on it compared to other airlines.

Flight was delayed due to the late arrival of the catering truck, which is quite unacceptable. There was a beverage service, but no pretzel, or cookie, or nuts were served in coach.

Not worth the premium paid for the first class ticket

Not worth the price of premium class ticket paid, felt more like steerage.

Flighty delayed on boarding - then group 1 had to check their carry on bags but groups 3 and beyond could carry bags on - very inconvenient for weekend business trip with no checked baggage. Then delayed on the runway - before take off. No communication from pilot on why or how long. Wifi/Entertainment didn't work for 4+ flight. Upon arrival, attendants announced wrong carousel for baggage claim - everyone was waiting at the wrong place for their checked bags. This was a mess united!

I flew Delta last week and United Airlines is a poor substitute mechanical problems with the plane and shitty food among other things made my travel experience what’s become to be expected from United no way is it ever worth the money they make us pay

I had a great flight. Everything went smoothly and the flight arrived early.

Well....let's start from the point that I had to stay in airport for 12 hours instead of 2 that was scheduled. Poor company and even worst customer service. Never again....

Missed this flight due to the first AA flight delay

Missed connection from Philadelphia to London because flight from DC was seriously delayed. Was re-routed the next day (had to pay for hotel) to Zurich and was given a main cabin middle seat while I had paid for premium. Great job AA!!!

Original flight delayed several times and finally canceled at 2:30 in the morning. Staff at the gate was not very helpful in resolving problems or communicating why there were delays. I spent 34 hours at the airport before I could leave, they couldn't book me on another early flight even after canceling my original flight. Next flight available after my original flight was canceled was 22 hours later. I will never fly American Airlines again.

very very tight seats unfriendly crew who do not seem to care about the comfort of their passengers and do not know how to smile poor ground staff support at LHR and PHX

So uncomfortable to sit in the tiny space on a long, international. Food was rough. Please, less white flour and processed food.

Our flight was delayed 2.5 hrs due to plane being too hot! After 1.5 hrs, airline decided to use another plane but had to wait for gate, baggage transfer & beverage transfer. Anyone could tell after first half hour that another plane was required and although did not affect us many would miss connecting flights at Heathrow. I have found the stewards are not the friendliest in the industry and the food is questionable, even as I like airplane food normally, the best of the 2 flights was the yogurt & granola for breakfast.

Terrible boarding , Business class seats are sub standard. As usual crew will miss your food too

Just get Economy Plus for international flights, so worth it the extra room, bigger seats…

The return trip was a customer service disaster. American Airlines needs an overhaul of how they treat their customers.

Was flying in premium eco and there were around 5-6 movies I wanted to watch and none of those could I play for some reasons. Not just me we checked w the person sitting next to me. Few of the movies were only playable :( Also that was not great that we couldn't upgrade to business however tried to, many times before the flight :(

Book cheap flights from Portland to London

Recent one-way flight deals

 
Only flying one-way? Below are some of the best one-way flight deals from Portland to London found on KAYAK in the last 72 hours.
9/3Tue
2 stops
17h 45mPWM-LHR
$488
9/3Tue
1 stopAmerican Airlines
17h 40mPWM-LHR
$508
6/28Fri
3 stops
42h 11mPWM-LGW
$570
9/3Tue
2 stopsTAP AIR PORTUGAL
24h 40mPWM-LGW
$573
6/28Fri
1 stop
19h 11mPWM-LGW
$580
9/12Thu
2 stopsAir Canada
16h 32mPWM-LHR
$628
6/28Fri
1 stopUnited Airlines
21h 55mPWM-LHR
$675
9/12Thu
1 stop
16h 41mPWM-LGW
$676
6/28Fri
2 stopsUnited Airlines
16h 08mPWM-LCY
$838
6/28Fri
2 stopsDelta
13h 42mPWM-LCY
$992

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Portland - London Flights

Departure:

Portland (PWM)United States

Cabin classes: