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$548+ Cheap flights from Harlingen, TX (HRL) to Heathrow (LHR)

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 3/13. Fares are subject to change and may not be available on all flights or dates of travel.
HRL — LHR
Feb 25 — Mar 41
Wed 2/25
Wed 3/4
1 adult, Economy
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Cheap flight deals from Harlingen to Heathrow

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 January 26, 2026.

This United Airlines deal was found by Cheapflights users on 1/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/185:25 pm
HRL
-
LHR
1 stop11h 50m
United Airlines
Tue 3/247:30 am
LHR
-
HRL
2 stops32h 46m
United Airlines
Deal found 1/24$641
This United Airlines deal was found by Cheapflights users on 1/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/105:25 pm
HRL
-
LHR
1 stop11h 50m
United Airlines
Mon 3/166:00 pm
LHR
-
HRL
2 stops32h 56m
United Airlines
Deal found 1/26$643
This Air Canada deal was found by Cheapflights users on 1/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/109:20 am
HRL
-
LHR
2 stops16h 10m
Air Canada
Mon 3/166:00 pm
LHR
-
HRL
2 stops32h 56m
Air Canada
Deal found 1/26$652
This Iberia deal was found by Cheapflights users on 1/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/1810:42 am
HRL
-
LHR
1 stop16h 33m
Iberia
Tue 3/248:20 am
LHR
-
HRL
1 stop14h 56m
Iberia
Deal found 1/24$659
This Iberia deal was found by Cheapflights users on 1/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/17:53 pm
HRL
-
LHR
1 stop12h 32m
Iberia
Thu 5/76:10 am
LHR
-
HRL
2 stops22h 41m
Iberia
Deal found 1/24$694
This United Airlines deal was found by Cheapflights users on 1/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/19:20 am
HRL
-
LHR
1 stop16h 20m
United Airlines
Thu 5/79:30 am
LHR
-
HRL
2 stops18h 29m
United Airlines
Deal found 1/26$707
This Finnair deal was found by Cheapflights users on 1/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Finnair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/12:47 pm
HRL
-
LHR
1 stop14h 08m
Multiple Airlines
Thu 5/712:55 pm
LHR
-
HRL
1 stop27h 22m
Multiple Airlines
Deal found 1/26$725
This Air Canada deal was found by Cheapflights users on 1/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/19:20 am
HRL
-
LHR
2 stops39h 10m
Air Canada
Thu 5/75:40 pm
LHR
-
HRL
2 stops47h 43m
Air Canada
Deal found 1/26$727
This Iberia deal was found by Cheapflights users on 1/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/102:36 pm
HRL
-
LHR
1 stop12h 39m
Iberia
Mon 3/168:20 am
LHR
-
HRL
1 stop16h 16m
Iberia
Deal found 1/24$790

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 January 26, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$641
(United Airlines)

One-way from

$548
(United Airlines)
Provider with most accurate pricing for Harlingen Valley Intl-London Heathrow flight deals.
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Provider most trusted by Cheapflights users for Harlingen Valley Intl-London Heathrow flights.
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From Harlingen Valley Intl to London Heathrow
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One-way flight from Harlingen Valley Intl to London Heathrow
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Cheapflights Fare Finder

 
Customize 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 2,558,603 searches. Data last updated January 26, 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

Wed 3/18

5:25 pm-10:15 am

1 stop11h 50m

London Heathrow

Tue 3/24

7:30 am-11:16 am

2 stops32h 46m

$641

HarlingenLondon

HRL - LHR

HRLLHR

Harlingen Valley Intl

Tue 3/10

7:00 am-7:30 am

1 stop19h 30m

London Heathrow

Mon 3/16

11:10 am-4:04 pm

2 stops33h 54m

$643

HarlingenLondon

HRL - LHR

HRLLHR

Harlingen Valley Intl

Tue 3/10

2:36 pm-8:15 am

1 stop12h 39m

London Heathrow

Mon 3/16

4:10 pm-10:12 am

1 stop23h 02m

$659

HarlingenLondon

HRL - LHR

HRLLHR

Harlingen Valley Intl

Wed 3/18

10:42 am-8:15 am

1 stop16h 33m

London Heathrow

Tue 3/24

8:20 am-6:16 pm

1 stop14h 56m

$659

HarlingenLondon

HRL - LHR

HRLLHR

Harlingen Valley Intl

Fri 3/13

12:10 pm-10:15 am

1 stop17h 05m

$548

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/23

  • Most accurate provider: When it comes to deals on Harlingen, Texas-London Heathrow Airport flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Harlingen, Texas-London Heathrow Airport flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Harlingen, Texas-London Heathrow Airport flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Harlingen, Texas-London Heathrow Airport flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Harlingen, Texas-London Heathrow Airport flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

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 round-trip 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?

    For a flight from Harlingen to London Heathrow, you will be flying from Valley Intl. Harlingen Valley Intl (HRL) is just 3.7 mi from the center of the city. Valley Intl is the only Harlingen airport and it handles 0 outbound flights to London Heathrow per day. 0 airlines have flights to London Heathrow from Harlingen Valley Intl on a regular basis.

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

    United Airlines and American Airlines can get you from Harlingen, Texas to London Heathrow Airport in just under 11h 50m. Your travel time can differ by up to 49m. There are 5109 mi between Harlingen, Texas and London Heathrow Airport. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • 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 vacation 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

Traveling to a place near London Heathrow Airport?

Book flights to London Heathrow Airport if you plan to visit one of these locations
Ilford
Hounslow
Southend-on-Sea
Harrow
Croydon
Eastleigh
Gatwick
Dartford
Dover
Winchester
Orpington
Watford
Northampton
Hayes
Borehamwood
Broadway
Aylesbury
Chipping Norton
Horley
Kingston upon Thames

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