Find flights
When to book
Airlines
FAQs

Cheap flights from London to Harlingen, Texas from £660

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 21/3. Fares are subject to change and may not be available on all flights or dates of travel.
LON — HRL
20 Mar — 27 Mar1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from London to Harlingen

Enter your travel dates to find the best prices.

Cheapest flights from London to Harlingen
Explore the most affordable flight options available from London to Harlingen. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 18 February 2026.

Thu 29/1009:30
LHR
-
HRL
2 stops30h 29m
United Airlines
Mon 2/1117:16
HRL
-
LHR
1 stop32h 14m
United Airlines
Deal found 17/2£841
Thu 29/1015:00
LHR
-
HRL
1 stop13h 55m
Iberia
Mon 2/1120:04
HRL
-
LHR
1 stop30h 11m
Iberia
Deal found 17/2£908
Sat 4/417:40
LHR
-
HRL
2 stops34h 19m
Air Canada
Sat 11/417:18
HRL
-
LHR
2 stops31h 12m
Air Canada
Deal found 17/2£1,014
Wed 1/408:30
LHR
-
HRL
2 stops32h 53m
Air Canada
Wed 8/407:00
HRL
-
LHR
2 stops17h 30m
Air Canada
Deal found 15/2£1,021
Sat 4/417:40
LHR
-
HRL
2 stops56h 00m
Multiple Airlines
Sat 11/420:03
HRL
-
LHR
1 stop30h 02m
Multiple Airlines
Deal found 17/2£1,089
Wed 1/407:30
LHR
-
HRL
2 stops20h 29m
United Airlines
Wed 8/417:18
HRL
-
LHR
1 stop12h 17m
United Airlines
Deal found 15/2£1,165
Sat 4/414:25
LHR
-
HRL
1 stop25h 47m
Iberia
Sat 11/420:03
HRL
-
LHR
1 stop28h 17m
Iberia
Deal found 17/2£1,235

Find flight deals from London to Harlingen

Discover tips and strategies to find the most affordable flight options for your journey from London (LON) to Harlingen (HRL). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated 18 February 2026.

Round-trip from

£1,014

One-way from

£660
Air Canada
  • Air Canada
  • 4/4-11/4
  • 4 total stops
  • 65h 31m total
  • London to Harlingen
Search Deals
21/3
  • 21/3
  • 3 total stops
  • 33h 16m total
  • London to Harlingen
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from London to Harlingen that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 858,174 searches. Data last updated 18 February 2026.
Use the filters below to find and compare flights from London to Harlingen that are best for you.

Fly from

London

Fly to

Harlingen

Route

Depart

Return

Price

LondonHarlingen

LHR - HRL

LHRHRL

London Heathrow

Sat 4/4

17:40-21:59

2 stops34h 19m

Harlingen Valley Intl

Sat 11/4

17:18-06:30

2 stops31h 12m

£1,014

LondonHarlingen

LHR - HRL

LHRHRL

London Heathrow

Wed 1/4

08:30-11:23

2 stops32h 53m

Harlingen Valley Intl

Wed 8/4

07:00-06:30

2 stops17h 30m

£1,021

LondonHarlingen

LHR - HRL

LHRHRL

London Heathrow

Sat 4/4

17:40-19:40

2 stops56h 00m

Harlingen Valley Intl

Sat 11/4

20:03-08:05

1 stop30h 02m

£1,089

LondonHarlingen

LHR - HRL

LHRHRL

London Heathrow

Wed 1/4

07:30-21:59

2 stops20h 29m

Harlingen Valley Intl

Wed 8/4

17:18-11:35

1 stop12h 17m

£1,165

LondonHarlingen

LHR - HRL

LHRHRL

London Heathrow

Sat 4/4

14:25-10:12

1 stop25h 47m

Harlingen Valley Intl

Sat 11/4

20:03-06:20

1 stop28h 17m

£1,235

LondonHarlingen

LHR - HRL

LHRHRL

London Heathrow

Sat 21/3

14:50-19:06

3 stops33h 16m

£660

LondonHarlingen

LHR - HRL

LHRHRL

London Heathrow

Sat 21/3

12:00-11:16

2 stops28h 16m

£821

Flights are sorted by cheapest return flights first.

Deals found on 18/2

Best time to book a flight from London to Harlingen

Have a flexible travel schedule? Discover the best time to fly to Harlingen from London with our price prediction graph.
Estimated return price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from London to Harlingen

What’s the top stopover airport for flights from London to Harlingen, Texas?

Share of one-stop return flights from London to Harlingen, Texas chosen by Cheapflights users in the past 12 months, using the same stopover each way.

Houston (IAH) – chosen by Cheapflights users on 80% of one-stop itineraries from London to Harlingen, Texas on Cheapflights.

What’s the cheapest stopover airport for flights from London to Harlingen, Texas?

Average return fare for one-stop flights from London to Harlingen, Texas, chosen by Cheapflights users in the past 12 months, with the same stopover each way.

Houston (IAH) is the most affordable one-stop option, with an average return flight price of £770.

What’s the fastest stopover option from London to Harlingen, Texas?

Shortest average travel time for one-stop one-way flights from London to Harlingen, Texas, based on itineraries clicked by Cheapflights users over the past 12 months, grouped by stopover airport.

Flights via Dallas (DFW) have the shortest average one-way travel time for one-stop routes: 13h 41m.

Which airport typically offers the quickest stopover for flights from London to Harlingen, Texas?

Average stopover duration for one-stop one-way flights from London to Harlingen, Texas, chosen by Cheapflights users in the last 12 months, grouped by stopover airport.

Flights via Dallas (DFW) offer the fastest connection on this route, with an average stopover time of 1h 42m.

Reviews of airlines servicing Harlingen

Get insights into the airlines that provide service to Harlingen. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Harlingen. Reviews last updated 18 February 2026.
Check out reviews from past customers who have flown with United Airlines from London to Harlingen to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
9,314 reviews
Check prices

Boarding

7.7

Food

6.6

Crew

8.1

Overall

7.4

Comfort

7.3

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Tim,Sept 2025

LHR - IAD

The premium economy seats were very comfortable and the attention and service by the flight attendants was superb.
United Airlines
7.4
Good
9,314 reviews
United Airlines
7.4
Good
9,314 reviews
Check prices

Boarding

7.7

Food

6.6

Crew

8.1

Overall

7.4

Comfort

7.3

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Tim,Sept 2025

LHR - IAD

The premium economy seats were very comfortable and the attention and service by the flight attendants was superb.

Related info for your journey

Find useful and relevant information for your journey from London to Harlingen. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly into for flights to Harlingen from London?

    Located just 3.7 mi from the city center, Harlingen Valley Intl is the airport most travelers will use when flying to Harlingen from London. Booking flights from London to Valley Intl (HRL) should be relatively easy as there are 0 daily inbound flights from London from 0 different airlines.

  • How long is the flight from London to Harlingen, Texas?

    Departing from London to Harlingen, Texas will take you 20h 29m. Airlines will cover a distance of 5109 mi. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.

  • Can I find deals for flights from London to Harlingen that include hotel bookings?

    Yes. In addition to deals on London to Harlingen flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from London to Harlingen?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from London to Harlingen.

  • Can I find deals for business class flights from London to Harlingen?

    Yes. Cheapflights offers flight deals from London to Harlingen by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for London to Harlingen

See prices for flight routes from nearby airports that may be better suited for you.
Heathrow to Dallas/Fort Worth flights
Gatwick to Dallas/Fort Worth flights
Heathrow to Hobby flights
London City to Dallas/Fort Worth flights
Stansted to Dallas/Fort Worth flights
Heathrow to George Bush Intcntl flights
Heathrow to Love Field flights
Luton to Dallas/Fort Worth flights
Gatwick to Love Field flights
Heathrow to Austin flights
Gatwick to Hobby flights
London City to Hobby flights
Gatwick to George Bush Intcntl flights
London City to George Bush Intcntl flights
Stansted to George Bush Intcntl flights
Manchester to Dallas/Fort Worth flights
Gatwick to Austin flights
London City to Austin flights
Manchester to Austin flights
Manchester to Hobby flights
Manchester to Love Field flights
Manchester to George Bush Intcntl flights
Stansted to Austin flights
Heathrow to San Antonio flights
Birmingham to Dallas/Fort Worth flights
Gatwick to San Antonio flights
Edinburgh to Dallas/Fort Worth flights
Newcastle upon Tyne to Hobby flights
Heathrow to El Paso flights
London City to San Antonio flights
Edinburgh to Hobby flights
Birmingham to Love Field flights
Birmingham to Austin flights
Newcastle upon Tyne to George Bush Intcntl flights
Birmingham to Hobby flights
London City to El Paso flights
Manchester to San Antonio flights
Edinburgh to Austin flights
Manchester to El Paso flights
Edinburgh to George Bush Intcntl flights
Gatwick to El Paso flights
Newcastle upon Tyne to Dallas/Fort Worth flights
Leeds to Dallas/Fort Worth flights
Birmingham to George Bush Intcntl flights
Leeds to Hobby flights
Edinburgh to Love Field flights
Leeds to George Bush Intcntl flights
Newcastle upon Tyne to Austin flights
Leeds to Austin flights
Southampton to Austin flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from London to Harlingen?

Cheapflights makes it easy to find London to Harlingen flights by helping our users search from 900+ travel sites for deals. We also provide you with filters for cabin, price, airline, airports, number of stops, and many more to narrow down that perfect flight.

Why should you use Cheapflights to find cheap flight tickets from London to Harlingen?

Cheapflights simply makes it quick and affordable to book flights from London to Harlingen by bringing together all flight options from hundreds of airlines and agencies online — and put it in one place for you to choose from. Plus, Cheapflights is 100% free to use for all.

Can Cheapflights find flights from London to Harlingen with no change fees?

Yes! Cheapflights helps users easily find flights from London to Harlingen with no change fees.

Can Cheapflights notify me if prices for flights from London to Harlingen become cheaper?

Yes! Start tracking prices for London to Harlingen flights today and get alerted whenever prices for these flights change. To access this feature, click the bell icon next to the flight deals above, which will prompt you for a valid email address to receive your alerts.

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.