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Cheap flights from Harlingen, Texas to London Heathrow Airport from £493

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 10/3. Fares are subject to change and may not be available on all flights or dates of travel.
HRL — LHR
11 Jan — 18 Jan1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Harlingen to Heathrow

Enter your travel dates to find the best prices.

Cheapest flights from Harlingen to Heathrow
Explore the most affordable flight options available from Harlingen to Heathrow. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 12 December 2025.

Wed 31/1214:48HRL - LHR
1 stop11h 47mIberia
Fri 9/106:05LHR - HRL
2 stops18h 09mIberia
Deal found 10/12£1,300

Find flight deals from Harlingen to Heathrow

Discover tips and strategies to find the most affordable flight options for your journey from Harlingen (HRL) to Heathrow (LHR). 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 12 December 2025.

Round-trip from

£493
Delta
  • Delta
  • 10/3-16/3
  • 4 total stops
  • 62h 10m total
  • Harlingen to London
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from Harlingen to Heathrow 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 12 December 2025.
Use the filters below to find and compare flights from Harlingen to London Heathrow Airport that are best for you.

Fly from

Harlingen

Fly to

Heathrow

Route

Depart

Return

Price

HarlingenLondon

HRL - LHR

HRLLHR

Harlingen Valley Intl

Tue 10/3

16:07-06:55

2 stops33h 48m

London Heathrow

Mon 16/3

15:50-15:12

2 stops28h 22m

£493

HarlingenLondon

HRL - LHR

HRLLHR

Harlingen Valley Intl

Wed 18/3

16:07-07:05

1 stop33h 58m

London Heathrow

Tue 24/3

11:05-15:12

1 stop33h 07m

£497

HarlingenLondon

HRL - LHR

HRLLHR

Harlingen Valley Intl

Wed 18/3

10:42-08:15

1 stop16h 33m

London Heathrow

Tue 24/3

10:05-22:53

2 stops17h 48m

£500

HarlingenLondon

HRL - LHR

HRLLHR

Harlingen Valley Intl

Fri 1/5

05:50-06:20

1 stop18h 30m

London Heathrow

Thu 7/5

06:10-18:22

2 stops18h 12m

£524

HarlingenLondon

HRL - LHR

HRLLHR

Harlingen Valley Intl

Tue 10/3

10:42-06:50

1 stop15h 08m

London Heathrow

Mon 16/3

10:15-22:53

1 stop17h 38m

£534

Flights are sorted by cheapest return flights first.

Deals found on 10/12

Best time to book a flight from Harlingen to Heathrow

Have a flexible travel schedule? Discover the best time to fly to Heathrow 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 Heathrow Airport

What is the cheapest month to book a flight from Harlingen, Texas to London Heathrow Airport?

Currently, November is the cheapest month in which you can book a flight from Harlingen, Texas to London Heathrow Airport (average of £444). Flying from Harlingen, Texas to London Heathrow Airport in December is currently the most expensive (average of £1,202). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

Related info for your journey

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

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

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

    There are many flights that can get you from Harlingen, Texas to London Heathrow Airport in 33h 48m. Fly via Delta to get the fastest option. Harlingen, Texas and London Heathrow Airport are separated by a distance of 5109 mi.

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

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

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

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

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

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

  • What is the cheapest month to book a flight from Harlingen, Texas to London Heathrow Airport?

    Currently, November is the cheapest month in which you can book a flight from Harlingen, Texas to London Heathrow Airport (average of £444). Flying from Harlingen, Texas to London Heathrow Airport in December is currently the most expensive (average of £1,202). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Travelling to a place near London Heathrow Airport?

Book flights to London Heathrow Airport if you plan to visit one of these locations
Milton Keynes
Croydon
Slough
Northampton
Hounslow
Luton
Gatwick
Wembley
Ilford
Brentford
Colchester
Watford
Hayes
Crawley
Winchester
Swindon
Deal
Bedford
Romford
Chichester

Browse thousands of different options on Cheapflights for your next trip

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Fly with Cheapflights

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

When you search for this flight from Harlingen to Heathrow, Cheapflights searches on 900+ travel sites to save you time finding great flight deals online. Additionally, we offer filter features so you can choose a preferred cabin class or airline, see different price ranges, and much more so you can book the flight for you.

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

Millions of users choose and trust Cheapflights to book the best flight deals from Harlingen to Heathrow for free. We help you search and compare prices from hundreds of airlines for the right flight just for you.

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

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

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

Yes, Cheapflights offers price alerts on Harlingen to Heathrow flights so you can book your travel at the perfect time. Price Alerts can be enabled by clicking the bell icon next to the flight deals above and providing your email address where you want to receive the alerts.

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