$370 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 7/5. 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, 0 bags

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Cheap Flights from Portland to the United Kingdom

Cheapest round-trip prices found by our users on KAYAK in the last 72 hours
London
London1 stop$870
Edinburgh
Edinburgh1 stop$873
Manchester
Manchester2 stops$1,163
London
London1 stop$870
Edinburgh
Edinburgh1 stop$873
Manchester
Manchester2 stops$1,163

Book Cheap Portland to the United Kingdom Plane Tickets

 
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 27 - Mon, Nov 2
Virgin Atlantic Logo
6:00 am - 9:00 am
PWM
-
LHR
23h 00m
1 stop
Virgin Atlantic Logo
6:30 am - 10:23 pm
LHR
-
PWM
20h 53m
2 stops
$870Virgin Atlantic
Sun, Sep 6 - Sun, Sep 13
Delta Logo
2:35 pm - 6:20 am
PWM
-
LHR
10h 45m
1 stop
Delta Logo
8:40 am - 11:59 pm
LHR
-
PWM
20h 19m
2 stops
$871Delta
Wed, Sep 16 - Thu, Oct 1
American Airlines Logo
7:20 pm - 5:50 pm
PWM
-
GLA
17h 30m
2 stops
American Airlines Logo
8:35 am - 11:24 pm
GLA
-
PWM
19h 49m
2 stops
$873American Airlines
Mon, Sep 14 - Tue, Sep 22
KLM Logo
2:35 pm - 9:20 am
PWM
-
EDI
13h 45m
1 stop
KLM Logo
2:05 pm - 11:59 pm
EDI
-
PWM
14h 54m
1 stop
$873KLM
Mon, Sep 14 - Tue, Sep 22
American Airlines Logo
8:01 am - 7:30 am
PWM
-
EDI
18h 29m
1 stop
American Airlines Logo
11:25 am - 11:41 pm
EDI
-
PWM
17h 16m
2 stops
$878American Airlines
Tue, Sep 15 - Tue, Sep 29
United Airlines Logo
10:43 am - 10:10 am
PWM
-
GLA
18h 27m
1 stop
United Airlines Logo
2:00 pm - 11:27 pm
GLA
-
PWM
14h 27m
1 stop
$880United Airlines
Tue, Sep 15 - Tue, Oct 6
United Airlines Logo
6:00 am - 10:10 am
PWM
-
GLA
23h 10m
2 stops
United Airlines Logo
2:00 pm - 11:27 pm
GLA
-
PWM
14h 27m
1 stop
$885United Airlines
Tue, Oct 27 - Mon, Nov 2
KLM Logo
1:35 pm - 7:50 am
PWM
-
LHR
14h 15m
1 stop
KLM Logo
4:10 pm - 11:49 pm
LHR
-
PWM
12h 39m
1 stop
$899KLM
Tue, Oct 27 - Mon, Nov 2
Multiple Airlines Logo
5:06 pm - 11:20 am
PWM
-
LHR
14h 14m
2 stops
Multiple Airlines Logo
9:00 am - 10:57 pm
LHR
-
PWM
18h 57m
3 stops
$927Multiple Airlines
Thu, Aug 20 - Fri, Aug 28
Multiple Airlines Logo
12:45 pm - 9:20 am
PWM
-
EDI
15h 35m
2 stops
Multiple Airlines Logo
9:00 am - 11:20 pm
EDI
-
PWM
19h 20m
1 stop
$928Multiple Airlines
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 January, when tickets cost $0 (return) on average. On the other hand, the most expensive months are May and November, when the average cost of round-trip tickets is $1,003 and $850 respectively.

Good to know

Cheapest flight$370
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.

Reviews of the top 4 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.
7.9
DeltaOverall score based on 8451 reviews
8.1Boarding
7.8Comfort
7.2Food
8.5Crew
7.8Entertainment
Airline reviews

For some reason, TSA Atlanta didn’t have my bag on the flight on time and they don’t have to provide Delta a reason for that.

6.0 GoodRafiq, May 2026
ATL - GSP
Read more Delta reviews

For some reason, TSA Atlanta didn’t have my bag on the flight on time and they don’t have to provide Delta a reason for that.

WiFi didn’t work on two of four planes. Flight attendants were not overly friendly or welcoming. Planes were extremely slow to board and deplane.

Delta does a great job with entertainment and free wifi. I can still be in touch with my colleagues while in the air.

Aside from a completely packed plane, I really have no complaints.

Bus to plane was delayed for no apparent reason and our luggage was still on the belt when they shut it off. Took about 20 minutes to turn it back on to get our luggage.

It was a pleasant surprise to have complimentary Wi-Fi on the flight

Much better than Latam, the worse airline company ever. I hope I don't have the need to fly Latam ever in my life again.

Seats in Delta Main are unbelievably close to the seat in front of. Hard to get a backpack under the seat.

The flight was operated by Latam. The aircraft had a technical issue and the flight was delayed for the next day. They grounded other passengers to get their airplane assigned to my flight. Most of he ground staff don't speak English (Orlando Airport), but were very polite.The crew on the other hand could speak English and Portuguese. On board service was good.

The agent at check in and at the gate were less than thrilled to be at work. I'm not a fan of Kayak's placement on the plane. I got put in the middle seat and none of my preferences were used.

As per usual when you Hit the UK it's a slow process through customs Not as efficient at Thailand for sure

There were no charge points for phones on the economy seats. The seats were comfortable overall. Food was okay.. flight was on time

The flight was delayed. The aircraft was unclean. Promised seat was not given due to change in Aircraft. Not one crew on ground was in a position to give any response. Amsterdam Airport is AVIODABLE Over crowded. Over Expensive. Poor Services.

The crew were unprofessional with a racist element. I was physically abused as well from one of the crew members

Crew is not the cheerful type. very slow meal service (this is their style as have flown this many times)

Empty seats next to me - wish it had been for a longer flight!!

Terrible last row seats many seats available but no offer to move to better seat

Delay and had to run between flight to get my connection due to this delay but besides that the overall experience was ok. I arrived with just an hour of delay.

They forgot to serve food and the crew was very unfriendly. Never experienced such a bad KLM flight. Usually fly from Toronto. New York was different.

The immigration hall in Amsterdam was understaffed, so passport checking was slower than it should be for a major airport. They need to get the automatic readers up and running for non EU passport holders. Waiting in line after a long flight feels a bit abusive.

Excellent! I got to Munich and was transferred to my Lufthansa flight quickly, in 15 to 20 minutes, so I did not miss my flight. However, I had checked my overhead bag at the boarding gate in Tampa. That got to Tunis the next day. That is to be expected.

It's a short hop. My carryon was checked at the gate, I didn't have to drag it all over the airport. Excellent wheelchair assist.

WiFi didn’t exist , seats were super cramped, lights stayed on near my seat for a long time while others were dimmed, the food/trash/drink cart hit my shoulder at least a couple of times while moving, food options were down to just one option by the time it got to my row, the utensils were garbage (knife bent at a couple of places by the time I was done eating) the spoon was very flimsy plastic

Friendliest Flight Attendant I’ve seen since I flew on Southwest Airlines. The whole trip was outstanding…and arrived Early!

It was good overall except from Omaha to Denver when flight a was a repeatedly delayed apparently due to some issue at Denver. Communications could have been handled better. I had to board then deboard with luggage and board again

I didn’t have a seat assignment and my seat was very dirty on the flight from Frankfurt to Budapest.

Left an hour and a half after the listed time. Up side was it had TV screens on the seat.

No screens or meal options. Freezing cold. Dirty seats. Left late.

O’hsre taxi and deboarding took 40 minutes. Needed 20 minutes extra time between connecting flights to avoid running through terminal.

Cree was organized and pleasant. Plane had good seating but as it’s a shuttle toilets hadn’t been thoroughly cleaned (eg. bins too full)

Premium Economy Good crew, good service, excellent food. Seat back screen just not bright enough.

Flight was delayed an no one cares, or try to help passengers to get the conexión.

Our flight was cancelled while we are on our way to the airport. So, no notice. We were rescheduled to another airline with a 2 hour later takeoff and so arrived at our destination on time. We pre-paid American Airlines $190 to upgrade our seats. No refund. So no use for AA or Kayak.

Terrible, horrible, disappointing- without telling us they changed planes and moved and separated our seats to opposite sides - said they changed seats putting us together - got to airport to find no, they did not - we sat opposing sides of plane - food overly salty to inedible, never saw stewardess but once - it was terrible

The business class layout of chairs was weired. You are sitting directly across stranger.,

We did not have enough time to make our connecting flight. As a result, we were put onto a different airline for our second leg. The different airline was NOT comparable to British Airlines, and our arrival was significantly delayed. The actual flight on BA was amazing.

Tv screens and movie selection v good. Friendly staff. They were really worried about max capacity and room for carryons. That is never fun but i had no problem finding space when I boarded.

My flight to London from Philadelphia was cancelled due to weather.

Disliked having to wait a little longer to disembark from the plan when we landed in London

Food should be better quality. Video screens have poor resolution and the library of movies is poor. The other airlines are much better.

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

Information on your arrival and departure airports