$457 Find Cheap Flights from Harlingen 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 Harlingen to the United Kingdom departing on 1/20. 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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Book Cheap Harlingen 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 Harlingen 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 Harlingen to the United Kingdom

Wed, Jan 28 - Wed, Feb 4
United Airlines Logo
5:25 pm - 7:30 am
HRL
-
LHR
32h 05m1 stop
United Airlines Logo
2:30 pm - 8:01 pm
LHR
-
HRL
35h 31m2 stops
$636United Airlines
Wed, Mar 18 - Tue, Mar 24
United Airlines Logo
12:10 pm - 7:30 am
HRL
-
LHR
14h 20m1 stop
United Airlines Logo
8:30 am - 11:16 am
LHR
-
HRL
31h 46m2 stops
$641United Airlines
Tue, Mar 10 - Mon, Mar 16
United Airlines Logo
5:25 pm - 10:15 am
HRL
-
LHR
11h 50m1 stop
United Airlines Logo
11:10 am - 7:56 pm
LHR
-
HRL
37h 46m2 stops
$642United Airlines
Wed, Jan 28 - Wed, Feb 4
Air Canada Logo
7:00 am - 7:10 am
HRL
-
LHR
18h 10m2 stops
Air Canada Logo
11:10 am - 11:26 am
LHR
-
HRL
30h 16m2 stops
$646Air Canada
Tue, Mar 10 - Mon, Mar 16
Air Canada Logo
9:20 am - 6:30 am
HRL
-
LHR
16h 10m2 stops
Air Canada Logo
1:00 pm - 4:04 pm
LHR
-
HRL
32h 04m2 stops
$649Air Canada
Tue, Mar 10 - Mon, Mar 16
United Airlines Logo
9:20 am - 7:30 am
HRL
-
LHR
17h 10m1 stop
United Airlines Logo
10:00 am - 9:56 pm
LHR
-
HRL
16h 56m1 stop
$658United Airlines
Sat, Jan 24 - Sat, Jan 31
United Airlines Logo
12:10 pm - 7:30 am
HRL
-
LHR
13h 20m1 stop
United Airlines Logo
9:10 am - 9:59 pm
LHR
-
HRL
18h 49m2 stops
$663United Airlines
Thu, Jan 29 - Mon, Feb 2
United Airlines Logo
5:25 pm - 5:00 pm
HRL
-
MAN
41h 35m2 stops
United Airlines Logo
6:00 am - 11:26 am
MAN
-
HRL
35h 26m2 stops
$664United Airlines
Fri, May 1 - Thu, May 7
Iberia Logo
5:50 am - 8:05 am
HRL
-
LHR
20h 15m1 stop
Iberia Logo
6:10 am - 6:22 pm
LHR
-
HRL
18h 12m2 stops
$703Iberia
Wed, Jan 28 - Wed, Feb 4
Iberia Logo
11:06 am - 10:00 am
HRL
-
LHR
16h 54m1 stop
Iberia Logo
10:35 am - 11:21 pm
LHR
-
HRL
18h 46m1 stop
$727Iberia
Booking Insights

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

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

Which airlines fly non-stop between Harlingen and United Kingdom?

Airline and price data is aggregated from results in KAYAK’s search results from the last 2 weeks for round-trip flights from Harlingen to the United Kingdom.

There is just one airline that flies from Harlingen to the United Kingdom direct and that is United Airlines. The best round-trip deal found from United Airlines for the route is to Birmingham (BHX) and costs $1,008.

Good to know

Cheapest flight$457
Flight from Harlingen to London

FAQs - booking United Kingdom flights

  • How does KAYAK find such low prices on flights from Harlingen 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 Harlingen to the United Kingdom.

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

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

 
Need help choosing which airline to fly with from Harlingen 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.
7.4
United AirlinesOverall score based on 9121 reviews
8.1Crew
6.6Food
7.1Entertainment
7.7Boarding
7.3Comfort
Airline reviews

Seats had less pitch than a regional jet. Food was OK. Have to buy alcohol on US based carriers flying international. Boarding was a mess. Did not have bags but overhead space was gone quick. Would like to see the airlines enforce the one bag over and one bag under policy

6.0 GoodAnonymous, Nov 2025
IAH - MEX
Read more United Airlines reviews

Seats had less pitch than a regional jet. Food was OK. Have to buy alcohol on US based carriers flying international. Boarding was a mess. Did not have bags but overhead space was gone quick. Would like to see the airlines enforce the one bag over and one bag under policy

Lately I like the planes have been exceptionally filthy. There’s lines of dust and dirt all across the ceiling in the vents, and the cracks in between the seats are literally full of food. It’s definitely not the quality of service that I was used to with United. I’m also very disappointed with the Wi-Fi! All I wanna do is knock out a few work jobs while I’m trapped in my seat And it spools so bad. They did provide me with a refund, but the process of getting that refund is so complicated. It’s unfortunate.

Crew was excellent. This was a relatively long flight though and had very little leg room, and no entertainment.

The newer screen was super cool and had the option to watch many different shows or movies. Crew was polite and helpful. However again, many children screaming bloody murder and kicking my seat, and parents doing nothing about it as usual.

Flight was good and crew was super polite. However, there were around 5 kids screaming the WHOLE 2 hours. I understand kids have to come but parents need to do something to control their children. They make the experience terrible, especially after finishing 16 hour shifts at the hospital I needed some sleep, which I did not get.

Plane was crowded and even when we hit altitude, the plane was hot, not enough air flow.

Flight was delayed and missed my connection Lufthansa didn’t respond.

the delay for 3 hours was understandable due to weather conditions but the flight should’ve provided some on flight compensations or at least provide more food.

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.

A little bit more leg room in premium economy. I am 6’4”.

The pilot greased the landing and the crew was fantastic.

Attendants were pleasant and the flight was smooth and relaxed.

It was fine. No drinks nor snacks offered though. I thought that was unusual.

Things were delayed a little. But that didn’t affect my plans. It was fine. I was surprised it was so full thanksgiving day. The crew were friendly and professional.

The flight was delayed multiple times, again no fault of American but again the extra cost, for everything makes it feel like a cheap airline! Especially when flights are outrageously expensive already

we landed at cmh ten minutes early but had to sit on tarmac for twenty minutes because a plane was at our gate despite the fact that 3 other gates were open.

I have a gluten allergy so did have any food

We were very rushed by a staff member at the gate when transferring from American Airlines to Fijian. Then the plane stayed put for ages anyhow! The plane was delayed and my bag sent to San Francisco instead of Fiji

Wish some foods provided rather than just biscuit/cookie for flight more than 2 hours

Flight was delayed leaving Dallas. Arrived about 2 hours later than scheduled.

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

Information on your arrival and departure airports