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Cheap flights from Harlingen, Texas to London from £374

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 19/4. Fares are subject to change and may not be available on all flights or dates of travel.
HRL — LON
19 Apr — 26 Apr1
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 20 March 2026.

Sun 23/817:16
HRL
-
LHR
1 stop12h 19m
United Airlines
Thu 27/807:30
LHR
-
HRL
2 stops20h 14m
United Airlines
Deal found 15/3£587
Tue 17/1112:11
HRL
-
LHR
1 stop18h 04m
Multiple Airlines
Fri 27/1115:00
LHR
-
HRL
1 stop13h 57m
Multiple Airlines
Deal found 16/3£602
Wed 29/420:03
HRL
-
LHR
1 stop12h 22m
Iberia
Wed 6/507:50
LHR
-
HRL
2 stops21h 01m
Iberia
Deal found 15/3£620
Mon 16/1107:27
HRL
-
LHR
1 stop18h 03m
United Airlines
Fri 20/1111:10
LHR
-
HRL
2 stops38h 19m
United Airlines
Deal found 18/3£626
Mon 16/1107:27
HRL
-
LHR
2 stops17h 43m
Air Canada
Wed 25/1113:00
LHR
-
HRL
2 stops38h 44m
Air Canada
Deal found 16/3£629
Mon 16/1107:27
HRL
-
LHR
2 stops17h 03m
Air Canada
Fri 20/1113:00
LHR
-
HRL
2 stops36h 29m
Air Canada
Deal found 18/3£632

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 20 March 2026.

Round-trip from

£587

One-way from

£374
United Airlines
  • United Airlines
  • 23/8-27/8
  • 3 total stops
  • 32h 33m total
  • Harlingen to London
Search Deals
19/4
  • 19/4
  • 3 total stops
  • 22h 54m 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 20 March 2026.
Use the filters below to find and compare flights from Harlingen to London that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight
Fastest return journey

HarlingenLondon

HRL - LHR

HRLLHR

Harlingen Valley Intl

Wed 29/4

20:03-14:25

1 stop12h 22m

London Heathrow

Wed 6/5

07:50-22:51

2 stops21h 01m

£620

HarlingenLondon

HRL - LHR

HRLLHR

Harlingen Valley Intl

Sun 23/8

07:27-11:35

1 stop22h 08m

London Heathrow

Thu 27/8

09:30-21:44

2 stops18h 14m

£623

HarlingenLondon

HRL - LHR

HRLLHR

Harlingen Valley Intl

Wed 29/4

12:05-09:20

2 stops15h 15m

London Heathrow

Wed 6/5

09:30-21:59

2 stops18h 29m

£635

HarlingenLondon

HRL - LHR

HRLLHR

Harlingen Valley Intl

Fri 1/5

09:20-07:40

1 stop16h 20m

London Heathrow

Thu 7/5

09:30-21:59

2 stops18h 29m

£670

HarlingenLondon

HRL - LHR

HRLLHR

Harlingen Valley Intl

Fri 1/5

07:00-06:30

2 stops17h 30m

London Heathrow

Fri 8/5

09:30-21:59

2 stops18h 29m

£710
Cheapest one-way

HarlingenLondon

HRL - LHR

HRLLHR

Harlingen Valley Intl

Sat 20/6

17:20-06:30

2 stops31h 10m

£377

HarlingenLondon

HRL - LHR

HRLLHR

Harlingen Valley Intl

Sat 20/6

17:20-07:40

1 stop32h 20m

£383

HarlingenLondon

HRL - LHR

HRLLHR

Harlingen Valley Intl

Sun 19/4

16:02-13:05

1 stop15h 03m

£384
Fastest single journey

HarlingenLondon

HRL - LHR

HRLLHR

Harlingen Valley Intl

Wed 10/6

20:04-14:25

1 stop12h 21m

£2,786

HarlingenLondon

HRL - LHR

HRLLHR

Harlingen Valley Intl

Sun 14/6

20:04-14:25

1 stop12h 21m

£2,964

Flights are sorted by cheapest return flights first.

Deals found on 15/3

Showing 1-10 of 13 resultsSorted by cheapest first
1
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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 12h 22m. Fly via Iberia or United Airlines 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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Wembley
Croydon
Luton
Hounslow
Slough
Gatwick
Ilford
Hayes
Brentford
Colchester
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Watford
Kingston upon Thames
Eastbourne
Romford
Ipswich
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Southend-on-Sea

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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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