$621 Find Cheap Flights from Harlingen to the United Kingdom

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 the United Kingdom departing on 1/8. 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, 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

Thu, Jan 8 - Wed, Jan 14
Delta Logo
3:39 pm - 8:10 pmHRL-LHR
22h 31m2 stops
Delta Logo
8:00 pm - 2:39 pmLHR-HRL
24h 39m2 stops
$621Delta
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Tue, Mar 10 - Mon, Mar 16
Delta Logo
4:07 pm - 6:20 amHRL-LHR
33h 13m2 stops
Delta Logo
3:50 pm - 3:12 pmLHR-HRL
28h 22m2 stops
$659Delta
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Wed, Mar 18 - Tue, Mar 24
Delta Logo
4:07 pm - 7:05 amHRL-LHR
33h 58m1 stop
Delta Logo
4:10 pm - 3:12 pmLHR-HRL
28h 02m2 stops
$664Delta
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Wed, Mar 18 - Tue, Mar 24
American Airlines Logo
2:45 pm - 9:20 amHRL-LHR
13h 35m2 stops
American Airlines Logo
10:15 am - 10:53 pmLHR-HRL
17h 38m2 stops
$668American Airlines
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Tue, Mar 10 - Mon, Mar 16
United Airlines Logo
9:20 am - 7:30 amHRL-LHR
17h 10m1 stop
United Airlines Logo
3:30 pm - 7:56 pmLHR-HRL
33h 26m2 stops
$696United Airlines
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Tue, Mar 10 - Mon, Mar 16
American Airlines Logo
6:46 pm - 11:40 amHRL-LHR
11h 54m1 stop
American Airlines Logo
10:15 am - 10:53 pmLHR-HRL
17h 38m1 stop
$713American Airlines
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Tue, Mar 10 - Mon, Mar 16
American Airlines Logo
6:46 pm - 12:15 pmHRL-LHR
12h 29m1 stop
American Airlines Logo
8:20 am - 10:53 pmLHR-HRL
19h 33m1 stop
$714American Airlines
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Fri, Jan 16 - Tue, Jan 20
United Airlines Logo
9:20 am - 7:30 amHRL-LHR
16h 10m1 stop
United Airlines Logo
9:30 am - 9:59 pmLHR-HRL
18h 29m2 stops
$724United Airlines
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Fri, Jan 16 - Tue, Jan 20
United Airlines Logo
7:00 am - 10:15 amHRL-LHR
21h 15m1 stop
United Airlines Logo
9:30 am - 9:59 pmLHR-HRL
18h 29m2 stops
$725United Airlines
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Fri, Feb 6 - Tue, Feb 10
United Airlines Logo
7:00 am - 5:00 pmHRL-MAN
28h 00m2 stops
United Airlines Logo
9:25 am - 9:59 pmMAN-HRL
18h 34m2 stops
$805United Airlines
Find Deal
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.

Which airlines provide the cheapest flights from Harlingen to the United Kingdom?

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 the United Kingdom were found on Delta ($621) and United Airlines ($805).

Good to know

Cheapest flight$621
Flight from Harlingen to London Heathrow Airport

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.

  • 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 evening, when round-trip flights cost $798 on average. Morning departures are around 15% more expensive than evening flights, on average. The most expensive time of day to fly to the United Kingdom is generally in the morning, which is peak travel time and where the average cost of a ticket is $919.

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 9057 reviews
7.3Comfort
7.1Entertainment
6.6Food
7.7Boarding
8.1Crew
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 2025IAH - 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 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.

The only thing to like was that we eventually got to our destination

Poor seat in rear of aircraft Food at Admiral’s Club Terminal D at DFW inedible

After we landed we sat on the tarmac for 1.5 hours waiting to get to our gate. Ridiculous.

We were delayed for a “couple of maintenance issues.” They were resolved rather quickly but a computer glitch caused someone in the airport to have to bring a physical copy of the paperwork so we could leave. I don’t know where they had to drive from to get to our plane but it took forever & we were 1 1/2 hrs late in leaving. The flight itself was fine.

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

Information on your arrival and departure airports