HRL - LHR

$808 Find Cheap Flights from Harlingen to London

This is the cheapest round-trip flight price found by a KAYAK user in the last 72 hours by searching for a flight from Harlingen to Heathrow departing on 8/14. 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

KAYAK searches hundreds of travel sites at once for deals on flights to London Heathrow Airport

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Harlingen 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 Harlingen to London, as well as popular online travel agencies
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Cheap Flights from Harlingen to London

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Harlingen to London 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.

Recent round-trip flight deals from Harlingen to Heathrow

KAYAK's recommended round-trip deals from the most popular airlines that fly from Harlingen to Heathrow.
Discover the best prices for you by selecting your travel dates on KAYAK.
American Airlines Logo
10:02 am - 9:00 amHRL-LHR
16h 58m1 stop
American Airlines Logo
4:25 pm - 11:55 pmLHR-HRL
13h 30m1 stop
$808American Airlines
Find Deal
Thu, Aug 14 - Sun, Aug 31
American Airlines Logo
2:47 pm - 2:25 pmHRL-LHR
17h 38m1 stop
American Airlines Logo
3:00 pm - 11:55 pmLHR-HRL
14h 55m2 stops
$812American Airlines
Find Deal
Thu, Aug 14 - Sun, Aug 31
United Airlines Logo
7:00 am - 5:55 amHRL-LHR
16h 55m2 stops
United Airlines Logo
1:30 pm - 10:46 pmLHR-HRL
39h 16m2 stops
$835United Airlines
Find Deal
Thu, Sep 11 - Mon, Sep 29
United Airlines Logo
7:10 am - 7:40 amHRL-LHR
18h 30m1 stop
United Airlines Logo
7:25 am - 7:33 pmLHR-HRL
18h 08m2 stops
$864United Airlines
Find Deal
Thu, Aug 14 - Sun, Aug 31
United Airlines Logo
11:55 am - 11:35 amHRL-LHR
17h 40m1 stop
United Airlines Logo
6:30 am - 10:46 pmLHR-HRL
22h 16m2 stops
$867United Airlines
Find Deal
Thu, Sep 11 - Mon, Sep 29
United Airlines Logo
5:20 pm - 11:35 amHRL-LHR
12h 15m1 stop
United Airlines Logo
1:40 pm - 9:52 pmLHR-HRL
14h 12m1 stop
$879United Airlines
Find Deal
Thu, Aug 14 - Sun, Aug 31
United Airlines Logo
7:15 am - 6:30 amHRL-LHR
17h 15m2 stops
United Airlines Logo
8:30 am - 7:44 pmLHR-HRL
41h 14m2 stops
$967United Airlines
Find Deal
Wed, May 14 - Mon, May 19
 Logo
5:30 pm - 11:35 amHRL-LHR
12h 05m1 stop
 Logo
8:30 am - 4:04 pmLHR-HRL
37h 34m2 stops
Wed, May 14 - Sun, May 18
 Logo
5:10 am - 6:45 amHRL-LHR
19h 35m2 stops
 Logo
12:05 pm - 4:00 pmLHR-HRL
33h 55m2 stops
$1,217
Find Deal
Thu, May 29 - Mon, Jun 2
Air Canada Logo
5:10 am - 11:50 amHRL-LHR
24h 40m2 stops
Air Canada Logo
9:30 am - 4:00 pmLHR-HRL
36h 30m2 stops
$5,755Air Canada
Find Deal
Fri, Jun 13 - Fri, Jun 20
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KAYAK's insights & trends for Harlingen to Heathrow flights

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

Which airlines provide the cheapest flights from Harlingen to London?

The cheapest round-trip price for the route for each airline clicked by KAYAK users in the last 72 hours.

In the past 3 days, the cheapest round-trip tickets from Harlingen to London were found on American Airlines ($808) and United Airlines ($835).

Good to know

Cheapest flight$808
Flight from Harlingen to London

When to book flights from Harlingen to Heathrow

Are your dates flexible? Find out the best times to travel from Harlingen to Heathrow 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 Harlingen to London flights

  • What is the cheapest flight from Harlingen to London Heathrow Airport?

    In the last 3 days, the lowest price for a flight from Harlingen to London Heathrow Airport was $808 for a round-trip ticket.

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

    Yes, you'll most likely have to show a valid passport before boarding the plane in Harlingen and on arrival in London.

  • Which airports will I be using when flying from Harlingen to London?

    Harlingen airport is called Harlingen Valley Intl and the only airport in London is London Heathrow.

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

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

  • Which airline alliances offer flights from Harlingen to London?

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

  • Which is the best airline for flights from Harlingen to London, United Airlines or American Airlines?

    The two airlines most popular with KAYAK users for flights from Harlingen to London are United Airlines and American Airlines. With an average price for the route of $905 and an overall rating of 7.4, United Airlines is the most popular choice. American Airlines is also a great choice for the route, with an average price of $851 and an overall rating of 7.2.

  • How does KAYAK find such low prices on flights from Harlingen 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 Harlingen to London.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to London from Harlingen 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 Harlingen 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 Harlingen with another airline. Booking your flights between Harlingen and LHR can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Harlingen 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 Harlingen up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Top airlines flying from Harlingen to Heathrow

 
See real verified KAYAK customer reviews for airlines flying from Harlingen 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 Harlingen to Heathrow? 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.
7.4
United AirlinesOverall score based on 8696 reviews
7.1Entertainment
7.3Comfort
7.7Boarding
8.1Crew
6.6Food
Airline reviews

Smooth flight. Boarding was chaotic. Could not hear the gate agent over the intercom. People were lined up in the wrong lines. Groups one and two were told to board through line one and group 3 through line 2. All very confusing. Once in the air, the flight was smooth. There was no entertainment option on this aircraft, even though it was a larger aircraft.

10.0 ExcellentDr. Joseph, Apr 2025IAH - ORD
Read more United Airlines reviews

Smooth flight. Boarding was chaotic. Could not hear the gate agent over the intercom. People were lined up in the wrong lines. Groups one and two were told to board through line one and group 3 through line 2. All very confusing. Once in the air, the flight was smooth. There was no entertainment option on this aircraft, even though it was a larger aircraft.

My suitcase was completed destroyed. The top part is broken and unusable now.

We boarded but then sat there waiting on some missed connection people to get on so we sat for about 15 minutes for that. Then we sat again because the passenger manifest was wrong and they had to figure it out before we could leave. That took about another 20 minutes or so. The crew was working hard to figure it out so it’s not their fault. It ended up being a system glitch where someone was upgraded to first class while another person was also in the same seat and it just created a mess that took a little while to figure out. They literally went to every person on the plane asking their names to see who was sitting in the wrong seat. I also hate the entertainment that must be watched on your phone or tablet. Just give us setback screens. It’s so much better. Almost every Delta flight has this now and it is so nice to have them. The crew did a great job. I have no complaints from them. They were very hard working, even with the mishap and a disgruntled passenger.

My priority checked bag was not loaded on the flight. I had to sit in baggage claim in Las Vegas for 2 1/2 hours waiting for the next flight. All baggage staff were very helpful, tracking showed it as scanned for loading. Nobody told me why it wasn't on my flight.

The flight was heavily booked so boarding was a lengthy process. The FA’s were rather abrupt during this process but became more gracious as the flight went on. Breakfast (puffed pastry and chewy sausage) was pretty horrible but there was fruit and yogurt which they didn’t mess up. Overall it was fine.

All male crew was just too woke for me. I felt like a sardine. I will never take a window seat or the rearmost seat again. I booked early and did not pay for seat selection and that was a mistake. The security at IAH was atrocious. I was violated and radiated as I was in a hurry to connect to my other flight. I may have lost items under the seat in front of me that I couldn't see nor bend over to look.

Food choices were very limited. Taste of the dishes was average.

It’s been awhile since I have traveled on United. I, along with my family who were on the flight noted how smoothly everything went . Boarding, flight crew and service was excellent.

Oh my gosh, I loved my experience with United! they made me want to travel more often.

Fight was delayed an hour due to operational issues ,then further delayed due to ground control for a total of about 1.30 hours. Salad was completely frozen and flatware was so cold you could barely handle it. Crew was friendly and professional and the flight was smooth. The aircraft was clean and well-serviced.

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.

Took off on time and successfully avoided weather that looked to be a problem along the way

British Airways staff are very polite and willing to help.

I liked everything. Except that my neck was hurting on the seat. I couldn't sleep.

We were delayed Al ost / hours after boarding so that maintenance had to add oil to the engines. Then the oil they grabbed had been left out in the Dallas record cold and was frozen. They had to go back to the hanger and grab some that was not frozen.

They changed my seat from one that I had paid for as an upgrade to a regular seat at the last minute.

Flight was empty so had a whole row to myself. Still had to wait to get the bag due to the negligence at Palm Springs departure.

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

There were several issues with this flight. I have flown quite often internationally and I was surprised by the lack of presence of attendants other than meal and drink times. The food was not best but I feel that is the norm. We also had to get off the plane once in London via stairs and bus to the terminal. Anyone who had another flight had to then get another bus to another terminal. This causes me to miss my flight and have to rebook.

Everything you need to know for your flight from Harlingen to Heathrow

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