$328 Find Cheap Flights from Portland to the United Kingdom

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 the United Kingdom departing on 9/8. 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
1 adult, Economy

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Best United Kingdom Flight Deals from Portland

Cheapest round-trip prices found by our users on KAYAK in the last 72 hours
London
London1 stop$671
Edinburgh
Edinburgh1 stop$697
Manchester
Manchester1 stop$661
London
London1 stop$671
Edinburgh
Edinburgh1 stop$697
Manchester
Manchester1 stop$661

Cheap Flights from Portland to the United Kingdom

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Portland to the United Kingdom that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Portland to the United Kingdom

Tue, Oct 7 - Tue, Oct 28
Virgin Atlantic Logo
12:30 pm - 8:35 amPWM-MAN
15h 05m1 stop
Virgin Atlantic Logo
12:00 pm - 12:03 amMAN-PWM
16h 03m1 stop
$661Virgin Atlantic
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Wed, Aug 13 - Thu, Sep 18
JetBlue Logo
6:05 am - 8:45 pmPWM-LHR
9h 40m1 stop
JetBlue Logo
8:15 am - 10:02 pmLHR-PWM
18h 47m1 stop
$671JetBlue
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Tue, Aug 12 - Wed, Aug 20
Delta Logo
2:36 pm - 10:00 amPWM-LGW
14h 24m1 stop
Delta Logo
12:00 pm - 12:48 amLGW-PWM
17h 48m1 stop
$708Delta
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Sun, Nov 2 - Fri, Nov 14
United Airlines Logo
9:54 am - 10:30 amPWM-EDI
19h 36m1 stop
United Airlines Logo
12:30 pm - 6:59 pmEDI-PWM
11h 29m1 stop
$709United Airlines
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Tue, Aug 12 - Wed, Aug 20
Delta Logo
2:36 pm - 10:00 amPWM-LGW
14h 24m1 stop
Delta Logo
12:00 pm - 12:48 amLGW-PWM
17h 48m1 stop
$709Delta
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Tue, Nov 4 - Fri, Nov 14
United Airlines Logo
9:45 am - 7:55 amPWM-EDI
17h 10m2 stops
United Airlines Logo
12:30 pm - 2:12 pmEDI-PWM
30h 42m2 stops
$714United Airlines
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Wed, Nov 19 - Sun, Nov 23
American Airlines Logo
5:50 am - 6:35 amPWM-LHR
19h 45m1 stop
American Airlines Logo
7:50 am - 6:17 pmLHR-PWM
15h 27m2 stops
$769American Airlines
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Sun, Aug 3 - Mon, Aug 11
KLM Logo
6:00 am - 8:00 amPWM-EDI
21h 00m1 stop
KLM Logo
9:00 am - 12:03 amEDI-PWM
20h 03m1 stop
$781KLM
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Sun, Nov 2 - Sun, Nov 16
KLM Logo
4:55 pm - 12:45 pmPWM-EDI
14h 50m2 stops
KLM Logo
11:45 am - 11:31 pmEDI-PWM
16h 46m1 stop
$804KLM
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Thu, Aug 28 - Sun, Sep 7
American Airlines Logo
4:05 pm - 4:05 pmPWM-GLA
19h 00m2 stops
American Airlines Logo
7:35 am - 11:05 pmGLA-PWM
20h 30m2 stops
$872American Airlines
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Booking Insights

KAYAK's insights & trends for Portland to the United Kingdom flights

Get data-powered insights and trends into flights from Portland to the United Kingdom 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 the United Kingdom?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Portland to the United Kingdom, 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 the United Kingdom is October, when tickets cost $638 (return) on average. On the other hand, the most expensive months are July and June, when the average cost of round-trip tickets is $1,188 and $1,174 respectively.


Good to know

Low seasonJuly
High seasonSeptember
Cheapest flight$328
Best time to beat the crowds but there is an average 6% increase in price.
Most popular time to fly and prices are also 15% lower on average.
Flight from Portland to London Heathrow Airport

FAQs - booking United Kingdom flights

  • How does KAYAK find such low prices on flights from Portland to the United Kingdom?

    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 the United Kingdom.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight from Portland to the United Kingdom 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 the United Kingdom?

    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 from Portland to the United Kingdom with an airline and back with another airline.

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

    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 from Portland to the United Kingdom up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

  • What is the cheapest time of day to fly to the United Kingdom?

    The cheapest time of day to fly to the United Kingdom is generally in the afternoon, when round-trip flights cost $827 on average. On average, there is no price difference when choosing to fly in the morning or the evening on this flight route. The most expensive time of day to fly to the United Kingdom is generally in the evening, which is peak travel time and where the average cost of a ticket is $869.

Reviews of the top 5 airlines serving from Portland to the United Kingdom

 
Need help choosing which airline to fly with from Portland to the United Kingdom? 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 7959 reviews
7.3Food
8.5Crew
7.9Entertainment
7.9Comfort
8.2Boarding
Airline reviews

There was no problems, just a little uncomfortable with seats that do not lay back a little

8.0 ExcellentWillie, Jul 2025PHX - DTW
Read more Delta reviews

There was no problems, just a little uncomfortable with seats that do not lay back a little

Always good but we must do something about people in rows ahead of you that don't put their seats back up when they are suppose to. And It's rough to not be able to even lean over to get something out of my purse.

Flight was delayed, 30+ bags had to be gate checked. Crew were very friendly!

Everything was good until we were boarding our connection flight in Atlanta, we were told to gate check our carry-on, but when we got inside the plane, there was plenty of room in the overhead.

Did not know my son and I had different seating arrangements. He was fine, but it was disappointing.

Flight was canceled, and no effort was made to help with rebooking, no hotel vouchers, no car transportation and minimal food voucher and most places for food were closed by the time the voucher was given. Waited for 3 hours for bags. Simply the worst travel experience I have ever had

Food was surprisingly good but the WiFi was not great

this crew didn't care much. bumping carts into seats more times than i care to remember

Very late arrival at PWM. Late jet getting to ATL. Equipment problem with aircraft - could not get enough water onto plane., Another delay getting FAA approval for flight with bottled H2O. Not the crew’s problem.

Everything was fine except the entertainment was not working for half of the flight.

Our first flight was delayed so we missed our connecting flight. However it was easy to book a later flight on their app.

My flight was delayed by 6 hours then I missed BOTH of my connecting flights, I then had to stay in the AIRPORT at JFK because soooooo many people also suffered from missing flights and there was no hotels available. I would like to be compensated for this experience! I had to stay in the airport for over 16 hours!

The service was great. However the lounge only gets passing grade

Cabin crew professional, polite and friendly, boarding was seemless, but come on KLM surely you can do better than a pack of cheesy biscuits as an inflight snack

Cabin crew were excellent, very proffesional, polite and friendly, in flight snack was underwhelming, a packet of cheese biscuits, im sure KLM could run to a sandwich!

Legroom not all it could be, especially when the seat in front is reclined. Otherwise it was good, food and beverage were nice.

This portion of the flight was through Indigo. A local carrier. So all economy seating. No real service some refreshments for purchase standard economy stuff.

Transfer at Amsterdam airport is very convenient and the airport is easy to navigate. Boarding was also quick and easy. Cabin crew were excellent and the meals were good, although lacking in options.

Overall very positive. Boarding was quick and organized. Cabin was clean and seats were reasonably comfortable. Cabin crew was excellent and the meals provided were also of good quality

This fight left ahead of time which meant it arrived early which was great. Staff were very professional, but as with all these Short hop Flights the food was a disappointing snack There was no entertainment on this flight, but I did not expect any

I learned that seating towards the end of plane that a line forms for the restroom and people use your chair as a hand railing, bumping your seat consistently. I was seated in the aisle. I think that next time if I am towards the back row I would want to sit in the middle or window seat.

The best airline I have ever travel , really good customer service, attention and service !!

United could have one single once of customer service. No human United employee would help me with the invalid mileage plus number, they said I had to speak with the computer.

United sent me a mileage plus number last year but that number is invalid so I can’t use it to check into flights or collect mileage. There is human to speak about the problem, only computers who keep asking me if I am using the correct email. It’s so frustrating and I cannot resolve it.

It was delayed instead of departing at 9:20pm, we departed at 11pm… putting us in Columbus after 2am! It was awful. Had I known about the delay, I could have spent some time in the United Lounge… I was starving because I started my journey in Budapest… so I was exhausted and hungry. Plus I had to make new arrangements to be picked up at the airport in Columbus, instead of midnight it was 2:30 am after getting luggage and out of airport. Not feasible. I would have just stayed in Chicago for the night and gotten a morning flight.

Not a great experience. We paid for the upgrade for premium economy seats and seated ourselves in very comfortable seats. Someone came along with the same seat on their boarding pass. The aircraft had been changed and as a result we were booted out and sent further back to small uncomfortable seats. After complaining we were moved to emergency row seats, which gave us more leg room but the seats don’t recline. For people in our 70’s we found having to sit upright from California to NJ very uncomfortable. Not sure why they chose to move senior citizens instead of the two people that were allowed to take the more comfortable seats. Not happy.

I liked the choice of lemon ginger tea. I think stewardesses can be more considerate of older people needs.

The food should improve! And The flight should leave on time and not make the traveler wait.

It was great, I’m very grateful for the pilots and crew flight attendants for everything.

Everything was great. Only thing that could’ve made it better was buy on board options for hot food, but the snacks were decent. The flight attendants were great. I had no complaints. I was able to make it to my destination safely

My JetBlue experience was nice. The flights ran on time, the aircraft was clean and comfortable, and the flight attendants were attentive. My only issue, which is isolated to the low-cost (budget) option at JetBlue, is that the check in process makes the user feel that they have to buy their seats. The seats offered for purchase are upgrades from the budget seats you get (which are essentially the last seats remaining). The interface should not make it feel like you must purchase a seat.

The plane was late to leave.. Internet was lousy. TV was not working. when we arrived, We stayed on the plane for a long time before we got to the gate. It took us a long time to retrieve our luggage because they didn’t know what carousel to send them to. It was a bad experience.

I especially liked the lead crew officer. His boarding and safety announcements were made with a bit of novelty and humor. The flight also left the gate 10 minutes early and we landed about 20 minutes early… It was a delightful flight…

There were mutliple delays. There was inconsistent, delayed, and poor communication regarding the delays.

flight was delayed for hours with no explanation. The plane was a very old aircraft.

Spend hours delayed with no food, water anything sitting on the aieplane with no ability to eat or use the restroom. My entire experience was the absolute worst. I will never fly jet Blue again.

It would have been nice if they had offered more than one set of snacks

Seats were not too comfortable; it was impossible to locate the underseat power outlet.

You get what you pay for with JetBlue. Every little thing costs more, you are nickel and dimed until the end. Entertainment doesn’t function. Flight attendants do the bare minimum.

The check in and boarding process was a bit of a cluster. Two people at the counter to check in, three random lines that nobody knew which was for what, and people kept getting shuffled from one line to another for no apparent reason because then they’d get shuffled back and end up getting out further back in the line than they were originally. I only had to hand my already checked bag over and it took 45 minutes. I was never assigned a seat so when I tried to board I was pulled out of line again while someone had to try to manually assign me a seat. During the flight I got up to go to the bathroom, and there was an attendant in the aisle offering pillows etc and it was a 30 min wait unbuckled standing by the bathrooms because she said I couldn’t go past her. First and last time flying jet blue to be honest.

The plane was probably full boarding was easy. We were able to check our carry-on luggage for free. It was a return flight through Philly to LA. Never saw a stewardess do a demonstration of emergency Procedures. I think my flight was pretty full

Flight was full, and would have preferred an aisle seat, but due to getting a late ticket ,the seat I had was adequate. The flight crew were very help full and hard working. Food and drink were excellent for the 11hr flight. Overall I was pleased with flight, and would recommend British Airways again.

More choices on menu. Seemed only thing offered was Scottish, and while that’s good for the Scot’s it doesn’t help the Americans who don’t like that food. And I really hate it when, during sleep time the attendants have a very loud conversation right over you. Lastly, I paid 5000 dollars for business class, and having to pay more to choose my seat early is really an insult. Seems greedy

The chicken adobo was a little too spicy but good otherwise. My personal opinion. Movie selection could be improved, too many horror movies. Could add a few more chick flicks! The flight was bumpy at times. We arrived a little early too! Flight attendants friendly.

Again flight was awesome except British Airways lost both gate checked luggage’s. Still missing

really bad they refused to check in luggages that I had purchased, even showing them the transaction receipt from british airways app the staff in miami was MEDIOCRE

Crew was great and responsive. Entertainment quit working with about 4 hours remaining on the flight. My seat cushion was broken.

Not very good , the stewardess were unfriendly and they don't like to be bothered. Cos was a night flight and they need to sleep.

British Airways staff are very polite and willing to help.

This particular flight wasn't very full at the back, so there were three seats available for spreading out and getting relatively comfortable

Everything you need to know for your flight from Portland to the United Kingdom

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