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Cheap flights from Harlingen, Texas to London from £405

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 13/3. Fares are subject to change and may not be available on all flights or dates of travel.
HRL — LON
4 Mar — 11 Mar1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Harlingen to London

Enter your travel dates to find the best prices.

Cheapest flights from Harlingen to London
Explore the most affordable flight options available from Harlingen to London. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 2 February 2026.

Tue 10/312:10
HRL
-
LHR
1 stop17h 05m
United Airlines
Mon 16/318:00
LHR
-
HRL
2 stops32h 56m
United Airlines
Deal found 2/2£475
Tue 31/318:46
HRL
-
LHR
1 stop13h 39m
Iberia
Wed 29/411:30
LHR
-
HRL
2 stops28h 47m
Iberia
Deal found 1/2£477
Tue 10/309:20
HRL
-
LHR
2 stops16h 10m
Air Canada
Mon 16/318:00
LHR
-
HRL
2 stops32h 56m
Air Canada
Deal found 1/2£480
Wed 18/312:10
HRL
-
LHR
1 stop14h 20m
United Airlines
Tue 24/312:05
LHR
-
HRL
1 stop14h 51m
United Airlines
Deal found 2/2£486
Tue 24/312:10
HRL
-
LHR
1 stop14h 20m
United Airlines
Tue 31/307:25
LHR
-
HRL
2 stops18h 15m
United Airlines
Deal found 31/1£489
Tue 31/312:05
HRL
-
LHR
2 stops36h 25m
Air Canada
Wed 29/408:30
LHR
-
HRL
2 stops43h 29m
Air Canada
Deal found 1/2£493
Fri 1/506:00
HRL
-
LHR
1 stop20h 05m
Iberia
Thu 7/506:10
LHR
-
HRL
2 stops22h 41m
Iberia
Deal found 2/2£512
Tue 10/310:42
HRL
-
LHR
1 stop16h 33m
American Airlines
Mon 16/316:10
LHR
-
HRL
1 stop23h 02m
American Airlines
Deal found 1/2£522

Find flight deals from Harlingen to London

Discover tips and strategies to find the most affordable flight options for your journey from Harlingen (HRL) to London (LON). 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 2 February 2026.

Round-trip from

£475

One-way from

£405
United Airlines
  • United Airlines
  • 10/3-16/3
  • 3 total stops
  • 50h 59m total
  • Harlingen to London
Search Deals
United Airlines
  • United Airlines
  • 13/3
  • 2 total stops
  • 18h 05m total
  • Harlingen to London
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from Harlingen to London 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 2 February 2026.
Use the filters below to find and compare flights from Harlingen to London that are best for you.

Fly from

Harlingen

Fly to

London

Route

Depart

Return

Price

HarlingenLondon

HRL - LHR

HRLLHR

Harlingen Valley Intl

Tue 10/3

12:10-10:15

1 stop17h 05m

London Heathrow

Mon 16/3

11:10-16:04

2 stops33h 54m

£475

HarlingenLondon

HRL - LHR

HRLLHR

Harlingen Valley Intl

Tue 31/3

18:46-14:25

1 stop13h 39m

London Heathrow

Wed 29/4

11:30-10:17

2 stops28h 47m

£477

HarlingenLondon

HRL - LHR

HRLLHR

Harlingen Valley Intl

Wed 18/3

12:10-07:30

1 stop14h 20m

London Heathrow

Wed 25/3

10:00-21:56

1 stop16h 56m

£486

HarlingenLondon

HRL - LHR

HRLLHR

Harlingen Valley Intl

Wed 18/3

12:10-07:30

1 stop14h 20m

London Heathrow

Tue 24/3

10:00-21:56

1 stop16h 56m

£486

HarlingenLondon

HRL - LHR

HRLLHR

Harlingen Valley Intl

Fri 13/3

09:20-08:25

2 stops18h 05m

£405

HarlingenLondon

HRL - LHR

HRLLHR

Harlingen Valley Intl

Tue 19/5

18:45-17:15

2 stops16h 30m

£473

HarlingenLondon

HRL - LHR

HRLLHR

Harlingen Valley Intl

Sat 16/5

20:03-14:25

1 stop12h 22m

£505

HarlingenLondon

HRL - LHR

HRLLHR

Harlingen Valley Intl

Mon 18/5

19:53-14:25

1 stop12h 32m

£535

HarlingenLondon

HRL - LHR

HRLLHR

Harlingen Valley Intl

Fri 15/5

19:53-14:25

1 stop12h 32m

£576

HarlingenLondon

HRL - LHR

HRLLHR

Harlingen Valley Intl

Wed 6/5

20:03-14:25

1 stop12h 22m

£2,855

Flights are sorted by cheapest return flights first.

Deals found on 1/2

Best time to book a flight from Harlingen to London

Have a flexible travel schedule? Discover the best time to fly to London from Harlingen 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 Harlingen to London
No data available for this route at this time. Please check back soon.

Related info for your journey

Find useful and relevant information for your journey from Harlingen to London. 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 from for flights from Harlingen to London?

    If you book a flight to London from Harlingen, you will be flying from Valley Intl, which is the city’s only airport. Harlingen Valley Intl (HRL) is located 3.7 mi from the center of Harlingen. There are 0 flights from Valley Intl to London per day from 0 different airlines.

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

    There are many flights that can get you from Harlingen, Texas to London in 13h 39m. Fly via United Airlines or Iberia to get the fastest option. The distance between Harlingen, Texas and London is about 5109 mi. This flight may include one or multiple stops.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Harlingen to London 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

Travelling to a place near London?

Book flights to London if you plan to visit one of these locations
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Luton
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Gatwick
Slough
Ilford
Hounslow
Brentford
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Watford
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Bedford
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Eastbourne
Crawley
Kingston upon Thames
Romford
Ipswich

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Alternative routes for Harlingen to London

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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 Harlingen to London?

Cheapflights helps you search for flights from Harlingen to London via 900+ travel sites so you don’t have to. After performing a flight search, users can also filter their flight selection by filtering for price, number of stops, airlines, and so on.

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

Cheapflights simply makes it quick and affordable to book flights from Harlingen to London 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 Harlingen to London with no change fees?

Certainly. Search results for flights to London from Harlingen shown to you on Cheapflights can be narrowed down with different useful search filters, which includes flexible booking options.

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

Of course! You can now track prices for flights from Harlingen to London and get an alert from Cheapflights when they change. Have a valid email address ready and click the bell icon next to the flight deals above to set up your price alerts.

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