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Cheap flights from Harlingen, Texas to London from £375

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 16/7. Fares are subject to change and may not be available on all flights or dates of travel.
HRL — LON
26 Apr — 3 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 27 March 2026.

Tue 10/1117:16
HRL
-
LHR
2 stops41h 34m
United Airlines
Fri 13/1112:05
LHR
-
HRL
1 stop15h 39m
United Airlines
Deal found 23/3£546
Mon 16/1112:10
HRL
-
LHR
1 stop13h 20m
United Airlines
Fri 20/1111:10
LHR
-
HRL
2 stops38h 19m
United Airlines
Deal found 22/3£626
Wed 12/805:15
HRL
-
LHR
2 stops24h 35m
Air Canada
Wed 9/917:40
LHR
-
HRL
2 stops31h 49m
Air Canada
Deal found 24/3£632
Wed 12/820:03
HRL
-
LHR
1 stop12h 22m
Iberia
Wed 9/910:05
LHR
-
HRL
1 stop15h 31m
Iberia
Deal found 24/3£638
Mon 20/407:00
HRL
-
LHR
2 stops21h 00m
Air Canada
Tue 28/410:00
LHR
-
HRL
1 stop15h 40m
Air Canada
Deal found 23/3£660
Sun 1/1107:27
HRL
-
LHR
1 stop20h 48m
United Airlines
Sun 8/1113:00
LHR
-
HRL
2 stops36h 29m
United Airlines
Deal found 22/3£663

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 27 March 2026.

Round-trip from

£632

One-way from

£375
Air Canada
  • Air Canada
  • 12/8-9/9
  • 4 total stops
  • 56h 24m total
  • Harlingen to London
Search Deals
Iberia
  • Iberia
  • 16/7
  • 1 total stop
  • 12h 21m 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 27 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

HarlingenLondon

HRL - LHR

HRLLHR

Harlingen Valley Intl

Mon 20/4

09:20-10:00

2 stops18h 40m

London Heathrow

Tue 28/4

09:30-19:40

2 stops16h 10m

£660

HarlingenLondon

HRL - LHR

HRLLHR

Harlingen Valley Intl

Fri 1/5

07:00-07:55

1 stop18h 55m

London Heathrow

Thu 7/5

07:30-21:59

2 stops20h 29m

£706

HarlingenLondon

HRL - LHR

HRLLHR

Harlingen Valley Intl

Wed 20/5

17:18-06:35

2 stops31h 17m

London Heathrow

Fri 29/5

10:00-21:54

1 stop17h 54m

£800
Fastest return journey

HarlingenLondon

HRL - LHR

HRLLHR

Harlingen Valley Intl

Mon 13/7

17:20-11:35

1 stop12h 15m

London Heathrow

Sun 26/7

07:45-19:49

2 stops18h 04m

£924

HarlingenLondon

HRL - LHR

HRLLHR

Harlingen Valley Intl

Wed 1/7

07:20-11:35

1 stop22h 15m

London Heathrow

Thu 16/7

13:40-21:54

1 stop14h 14m

£975
Cheapest one-way

HarlingenLondon

HRL - LHR

HRLLHR

Harlingen Valley Intl

Sat 16/5

12:10-10:00

2 stops39h 50m

£457

HarlingenLondon

HRL - LHR

HRLLHR

Harlingen Valley Intl

Sat 16/5

17:18-07:45

1 stop32h 27m

£479
Fastest single journey

HarlingenLondon

HRL - LHR

HRLLHR

Harlingen Valley Intl

Sun 5/4

20:06-14:25

1 stop12h 19m

£491

HarlingenLondon

HRL - LHR

HRLLHR

Harlingen Valley Intl

Sat 16/5

20:03-14:25

1 stop12h 22m

£755

Flights are sorted by cheapest return flights first.

Deals found on 24/3

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 18h 40m. Fly via Air Canada 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

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Ilford
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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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