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Cheap flights from Harlingen, Texas to London from £357

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 12/9. Fares are subject to change and may not be available on all flights or dates of travel.
HRL — LON
2 May — 9 May1
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 April 2026.

Wed 12/810:45
HRL
-
LHR
1 stop16h 15m
Iberia
Wed 9/911:30
LHR
-
HRL
2 stops28h 46m
Iberia
Deal found 27/3£658
Tue 13/1014:00
HRL
-
LHR
1 stop11h 40m
United Airlines
Fri 23/1009:30
LHR
-
HRL
2 stops18h 14m
United Airlines
Deal found 30/3£664
Wed 12/805:15
HRL
-
LHR
2 stops22h 45m
Air Canada
Wed 9/908:30
LHR
-
HRL
2 stops34h 44m
Air Canada
Deal found 27/3£669
Tue 13/1017:16
HRL
-
LHR
2 stops34h 44m
Air Canada
Fri 23/1008:30
LHR
-
HRL
2 stops34h 44m
Air Canada
Deal found 30/3£673
Fri 1/519:53
HRL
-
LHR
1 stop12h 32m
Iberia
Thu 7/506:10
LHR
-
HRL
2 stops22h 41m
Iberia
Deal found 1/4£738
Fri 1/507:00
HRL
-
LHR
2 stops17h 30m
United Airlines
Thu 7/509:30
LHR
-
HRL
2 stops18h 29m
United Airlines
Deal found 1/4£748

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 April 2026.

Round-trip from

£658

One-way from

£357
Iberia
  • Iberia
  • 12/8-9/9
  • 3 total stops
  • 45h 01m total
  • Harlingen to London
Search Deals
Iberia
  • Iberia
  • 12/9
  • 1 total stop
  • 12h 22m 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 April 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

HarlingenLondon

HRL - LHR

HRLLHR

Harlingen Valley Intl

Fri 1/5

19:53-14:25

1 stop12h 32m

London Heathrow

Thu 7/5

06:10-19:22

2 stops19h 12m

£739

HarlingenLondon

HRL - LHR

HRLLHR

Harlingen Valley Intl

Fri 1/5

07:00-05:55

2 stops16h 55m

London Heathrow

Thu 7/5

07:30-21:59

2 stops20h 29m

£749

HarlingenLondon

HRL - LHR

HRLLHR

Harlingen Valley Intl

Thu 30/4

09:20-07:45

1 stop16h 25m

London Heathrow

Thu 7/5

10:00-20:00

1 stop16h 00m

£760

HarlingenLondon

HRL - LHR

HRLLHR

Harlingen Valley Intl

Thu 14/5

17:18-11:35

1 stop12h 17m

London Heathrow

Thu 21/5

17:40-21:54

2 stops34h 14m

£788
Fastest return journey

HarlingenLondon

HRL - LHR

HRLLHR

Harlingen Valley Intl

Mon 14/9

20:03-14:25

1 stop12h 22m

London Heathrow

Mon 21/9

08:55-16:31

1 stop13h 36m

£848
Cheapest one-way

HarlingenLondon

HRL - LHR

HRLLHR

Harlingen Valley Intl

Sat 16/5

07:00-11:50

2 stops46h 50m

£482

HarlingenLondon

HRL - LHR

HRLLHR

Harlingen Valley Intl

Sat 16/5

17:18-07:45

1 stop32h 27m

£500
Fastest single journey

HarlingenLondon

HRL - LHR

HRLLHR

Harlingen Valley Intl

Tue 2/6

20:04-14:25

1 stop12h 21m

£746

HarlingenLondon

HRL - LHR

HRLLHR

Harlingen Valley Intl

Sat 16/5

20:03-14:25

1 stop12h 22m

£758

HarlingenLondon

HRL - LHR

HRLLHR

Harlingen Valley Intl

Sat 20/6

20:04-14:25

1 stop12h 21m

£797

Flights are sorted by cheapest return flights first.

Deals found on 29/3

Sorted by cheapest first

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 32m. 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?

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Croydon
Hounslow
Gatwick
Slough
Ilford
Luton
Hayes
Brentford
Colchester
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Watford
Kingston upon Thames
Romford
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Bedford
Chelmsford
Ipswich
Southend-on-Sea

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

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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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