$500 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 7/16. 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, Aug 12 - Wed, Sep 9
Air Canada Logo
5:15 am - 11:50 am
HRL
-
LHR
24h 35m
2 stops
Air Canada Logo
5:40 pm - 7:29 pm
LHR
-
HRL
31h 49m
2 stops
$843Air Canada
Wed, Aug 12 - Wed, Sep 9
Iberia Logo
8:03 pm - 2:25 pm
HRL
-
LHR
12h 22m
1 stop
Iberia Logo
10:05 am - 7:36 pm
LHR
-
HRL
15h 31m
1 stop
$852Iberia
Wed, Aug 12 - Wed, Sep 9
Iberia Logo
6:00 am - 9:00 am
HRL
-
LHR
21h 00m
1 stop
Iberia Logo
11:30 am - 10:16 am
LHR
-
HRL
28h 46m
2 stops
$854Iberia
Wed, Aug 12 - Wed, Sep 9
Iberia Logo
10:45 am - 9:00 am
HRL
-
LHR
16h 15m
1 stop
Iberia Logo
11:30 am - 10:16 am
LHR
-
HRL
28h 46m
2 stops
$875Iberia
Mon, Apr 20 - Tue, Apr 28
Air Canada Logo
9:20 am - 10:00 am
HRL
-
LHR
18h 40m
2 stops
Air Canada Logo
9:30 am - 7:40 pm
LHR
-
HRL
16h 10m
2 stops
$881Air Canada
Wed, Aug 12 - Wed, Sep 9
Air Canada Logo
5:15 am - 10:00 am
HRL
-
LHR
22h 45m
2 stops
Air Canada Logo
8:30 am - 1:14 pm
LHR
-
HRL
34h 44m
2 stops
$889Air Canada
Mon, Apr 20 - Tue, Apr 28
British Airways Logo
2:47 pm - 10:55 am
HRL
-
LHR
14h 08m
1 stop
British Airways Logo
12:55 pm - 10:17 am
LHR
-
HRL
27h 22m
1 stop
$891British Airways
Wed, Aug 12 - Wed, Sep 9
Iberia Logo
4:58 pm - 12:10 pm
HRL
-
LHR
13h 12m
1 stop
Iberia Logo
8:55 am - 4:31 pm
LHR
-
HRL
13h 36m
1 stop
$903Iberia
Fri, May 1 - Thu, May 7
United Airlines Logo
12:10 pm - 11:35 am
HRL
-
LHR
17h 25m
1 stop
United Airlines Logo
9:30 am - 9:59 pm
LHR
-
HRL
18h 29m
2 stops
$942United Airlines
Fri, May 8 - Fri, May 15
United Airlines Logo
7:00 am - 6:30 am
HRL
-
LHR
17h 30m
2 stops
United Airlines Logo
9:30 am - 9:59 pm
LHR
-
HRL
18h 29m
2 stops
$946United Airlines
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 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 Air Canada ($843) and Iberia ($852).

Find deals

Good to know

Cheapest flight$500
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 airline 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 9499 reviews
7.3Comfort
6.6Food
8.1Crew
7.1Entertainment
7.7Boarding
Airline reviews

I've been flying American mostly, and it's been very frustrating. This united flight makes me realize maybe the issue isn't flying, but the airline. United was a significantly better experience. The plane was more comfortable, with a normal amount of leg room (vs the ridiculous reductions AA has made), more comfortable seats, screens to watch movies. It was a much better experience!

8.0 ExcellentShawna, Mar 2026
IAH - JAX
Read more United Airlines reviews

I've been flying American mostly, and it's been very frustrating. This united flight makes me realize maybe the issue isn't flying, but the airline. United was a significantly better experience. The plane was more comfortable, with a normal amount of leg room (vs the ridiculous reductions AA has made), more comfortable seats, screens to watch movies. It was a much better experience!

We had excellent customer service despite the chaos at George Bush airport in Houston!

It isvvery small flight. No leg room . No space to put my personal item at feet.

Didn't make the flight because the first leg of my flight was canceled and the next leg was already booked.

Terrible because it was cancelled due to volcanic ash clouds in Guatemala while all other airlines kept flying. Had to pay for a hotel to stay overnight in Houston and try to fly next day.

Overall we had a good experience during our flight from San Francisco to Houston.

Airport terminal was outdated, flight was on a small jet with no wifi

The crew made our experience extremely bad. They were rude and didn’t have anything for kids.

Do not like the size of the overhead bin. I think staff should monitor the size of suitcases that are being carried on by passengers to ensure they meet the size requirement.

The power at the seat didn't work and the seat itself was difficult to adjust - this was a business class seat. Flight attendant gave me miles to compensate. The attendant was very professional and on top of his game the entire flight.

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

Information on your arrival and departure airports

Harlingen (HRL)