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Cheap flights from Harlingen, Texas to London Heathrow Airport from £602

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 17/11. Fares are subject to change and may not be available on all flights or dates of travel.
HRL — LHR
20 Apr — 27 Apr1
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 21 March 2026.

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
Sun 23/807:27
HRL
-
LHR
1 stop22h 08m
United Airlines
Thu 27/809:30
LHR
-
HRL
2 stops18h 14m
United Airlines
Deal found 17/3£622
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£625
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£631
Mon 17/805:15
HRL
-
LHR
2 stops22h 20m
Air Canada
Fri 4/914:10
LHR
-
HRL
2 stops31h 24m
Air Canada
Deal found 21/3£632
Sun 15/1105:15
HRL
-
LHR
2 stops19h 15m
Air Canada
Wed 25/1113:00
LHR
-
HRL
2 stops38h 44m
Air Canada
Deal found 16/3£633
Sat 14/1117:16
HRL
-
LHR
2 stops31h 14m
Air Canada
Wed 25/1113:00
LHR
-
HRL
2 stops38h 44m
Air Canada
Deal found 16/3£636

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 21 March 2026.

Round-trip from

£622
United Airlines
  • United Airlines
  • 23/8-27/8
  • 3 total stops
  • 40h 22m 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 21 March 2026.
Use the filters below to find and compare flights from Harlingen to London Heathrow Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

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

£622

HarlingenLondon

HRL - LHR

HRLLHR

Harlingen Valley Intl

Mon 17/8

05:15-09:35

2 stops22h 20m

London Heathrow

Fri 4/9

14:10-15:34

2 stops31h 24m

£632

HarlingenLondon

HRL - LHR

HRLLHR

Harlingen Valley Intl

Mon 17/8

05:25-09:00

1 stop21h 35m

London Heathrow

Fri 4/9

10:05-23:55

1 stop19h 50m

£639

HarlingenLondon

HRL - LHR

HRLLHR

Harlingen Valley Intl

Mon 4/5

17:18-11:35

1 stop12h 17m

London Heathrow

Mon 11/5

16:25-20:00

2 stops33h 35m

£669
Fastest return journey

HarlingenLondon

HRL - LHR

HRLLHR

Harlingen Valley Intl

Fri 1/5

12:10-11:35

1 stop17h 25m

London Heathrow

Thu 7/5

09:30-21:59

2 stops18h 29m

£706
Cheapest one-way
Fastest single journey

HarlingenLondon

HRL - LHR

HRLLHR

Harlingen Valley Intl

Wed 10/6

20:04-14:25

1 stop12h 21m

£2,784

HarlingenLondon

HRL - LHR

HRLLHR

Harlingen Valley Intl

Sun 7/6

20:04-14:25

1 stop12h 21m

£2,962

HarlingenLondon

HRL - LHR

HRLLHR

Harlingen Valley Intl

Sat 6/6

20:04-14:25

1 stop12h 21m

£2,962

HarlingenLondon

HRL - LHR

HRLLHR

Harlingen Valley Intl

Fri 5/6

20:04-14:25

1 stop12h 21m

£4,137

HarlingenLondon

HRL - LHR

HRLLHR

Harlingen Valley Intl

Thu 4/6

20:04-14:25

1 stop12h 21m

£4,137

Flights are sorted by cheapest return flights first.

Deals found on 17/3

Sorted by cheapest first

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 22h 08m. Fly via United Airlines or Air Canada 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
Wembley
Croydon
Northampton
Luton
Hounslow
Slough
Gatwick
Ilford
Hayes
Brentford
Colchester
Guildford
Watford
Kingston upon Thames
Eastbourne
Romford
Ipswich
Swindon
Bedford

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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?

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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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