Find flights
When to book
FAQs

Cheap flights from Harlingen, Texas to London Heathrow Airport 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 — LHR
6 Mar — 13 Mar1
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 4 February 2026.

Tue 10/317:25
HRL
-
LHR
1 stop11h 50m
United Airlines
Mon 16/313:00
LHR
-
HRL
2 stops32h 04m
United Airlines
Deal found 4/2£473
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 stops18h 10m
Air Canada
Mon 16/318:00
LHR
-
HRL
2 stops32h 56m
Air Canada
Deal found 3/2£479
Wed 18/314:45
HRL
-
LHR
1 stop12h 30m
Iberia
Tue 24/308:20
LHR
-
HRL
1 stop14h 56m
Iberia
Deal found 3/2£484
Wed 18/307:00
HRL
-
LHR
1 stop19h 30m
United Airlines
Tue 24/310:00
LHR
-
HRL
1 stop14h 56m
United Airlines
Deal found 1/2£485
Wed 18/309:20
HRL
-
LHR
2 stops16h 00m
United Airlines
Wed 25/307:40
LHR
-
HRL
2 stops17h 16m
United Airlines
Deal found 31/1£488
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£492

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 4 February 2026.

Round-trip from

£473

One-way from

£405
United Airlines
  • United Airlines
  • 10/3-16/3
  • 3 total stops
  • 43h 54m 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 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 4 February 2026.
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

12:10-10:15

1 stop17h 05m

London Heathrow

Mon 16/3

13:00-16:04

2 stops32h 04m

£473

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

14:45-08:15

1 stop12h 30m

London Heathrow

Tue 24/3

08:20-18:16

1 stop14h 56m

£484

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

£485

HarlingenLondon

HRL - LHR

HRLLHR

Harlingen Valley Intl

Wed 18/3

07:00-07:30

1 stop19h 30m

London Heathrow

Tue 24/3

10:00-19:56

1 stop14h 56m

£485

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

£504

HarlingenLondon

HRL - LHR

HRLLHR

Harlingen Valley Intl

Mon 18/5

19:53-14:25

1 stop12h 32m

£534

HarlingenLondon

HRL - LHR

HRLLHR

Harlingen Valley Intl

Fri 15/5

19:53-14:25

1 stop12h 32m

£576

Flights are sorted by cheapest return flights first.

Deals found on 1/2

Showing 1-10 of 11 results
1
2

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.

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 13h 39m. Fly via United Airlines or Iberia to get the fastest option. Harlingen, Texas and London Heathrow Airport are separated by a distance of 5109 mi. Both multi-stop and direct flights can be found to your destination and back.

  • 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.

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
Luton
Northampton
Wembley
Gatwick
Slough
Ilford
Hounslow
Brentford
Hayes
Colchester
Watford
Guildford
Swindon
Bedford
Chelmsford
Eastbourne
Crawley
Kingston upon Thames

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

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 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.

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.