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$751+ Cheap flights from Harlingen, TX (HRL) to Heathrow (LHR)

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 9/11. Fares are subject to change and may not be available on all flights or dates of travel.
HRL — LHR
Mar 31 — Apr 71
Mon 3/31
Mon 4/7
1 adult, Economy
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Cheap 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 March 26, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$751
(United Airlines)

Popular in

June

Cheapest in

April

Average price

$742
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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Highest demand for flights based on searches. 16% potential increase in price ($183 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($45 potential savings vs. average RT price).
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Average for round-trip flights in March 2025
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Find 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 March 26, 2025.

This United Airlines deal was found by Cheapflights users on 3/24. 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.
Thu 9/115:25 pmHRL - LHR
2 stops34h 35mUnited Airlines
Mon 9/2910:50 amLHR - HRL
2 stops38h 39mUnited Airlines
Deal found 3/24$751
This American Airlines deal was found by Cheapflights users on 3/24. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/1410:03 amHRL - LHR
1 stop16h 57mAmerican Airlines
Sun 8/318:20 amLHR - HRL
1 stop15h 43mAmerican Airlines
Deal found 3/24$753
This Booking.com deal was found by Cheapflights users on 3/25. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/262:07 pmHRL - LHR
2 stops34h 28mAir Canada
Fri 6/68:30 amLHR - HRL
2 stops34h 55mAir Canada
Deal found 3/25$1,136
This Lufthansa deal was found by Cheapflights users on 3/25. 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 Lufthansa is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/255:10 amHRL - LHR
1 stop20h 30mMultiple Airlines
Fri 6/61:40 pmLHR - HRL
1 stop13h 55mMultiple Airlines
Deal found 3/25$1,375

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 March 26, 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

Thu 9/11

5:00 am-11:35 am

1 stop24h 35m

London Heathrow

Mon 9/29

10:50 am-7:29 pm

2 stops38h 39m

$751

HarlingenLondon

HRL - LHR

HRLLHR

Harlingen Valley Intl

Thu 8/14

10:03 am-9:00 am

1 stop16h 57m

London Heathrow

Sun 8/31

8:20 am-6:03 pm

1 stop15h 43m

$753

HarlingenLondon

HRL - LHR

HRLLHR

Harlingen Valley Intl

Mon 5/26

2:07 pm-6:35 am

2 stops34h 28m

London Heathrow

Fri 6/6

8:30 am-1:25 pm

2 stops34h 55m

$1,136

HarlingenLondon

HRL - LHR

HRLLHR

Harlingen Valley Intl

Sun 5/25

5:10 am-7:40 am

1 stop20h 30m

London Heathrow

Fri 6/6

1:40 pm-9:35 pm

1 stop13h 55m

$1,375

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/24

  • 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.

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 $661). Flying from Harlingen, Texas to London Heathrow Airport in June is currently the most expensive (average of $1,115). 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.

What is the cheapest time of day to fly from HRL to LHR?

Find hourly flight availability from Harlingen to Heathrow. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated March 26, 2025.

One of the essential ways to save on airfare from Harlingen, Texas to London Heathrow Airport is to remain as flexible as possible. Flights that are in the afternoon tend to be the most expensive. A flight in the morning could potentially save you up to 8% on airfare.

Rainfall in Heathrow by month

Plan your trip to Heathrow by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in London Heathrow Airport ranges from 1.6 - 2.8 inches per month. January is typically the wettest month, when rainfall can reach 2.8 in. July is typically the driest time to visit London Heathrow Airport when rainfall is around 1.6 in.

Temperature in Heathrow by month

Plan your trip to Heathrow by taking into account the average temperature totals by month.

If weather is an important factor for your trip to London Heathrow Airport, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 62.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 39.2 F).

Reviews of airlines servicing Heathrow

Get insights into the airlines that provide service to Heathrow. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Heathrow. Reviews last updated March 26, 2025.
United Airlines
7.4
Good
8,608 reviews

Crew

8.1

Food

6.6

Comfort

7.3

Entertainment

7.0

Boarding

7.7

Overall

7.4

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??
United Airlines
7.4
Good
8,608 reviews
United Airlines
7.4
Good
8,608 reviews

Crew

8.1

Food

6.6

Comfort

7.3

Entertainment

7.0

Boarding

7.7

Overall

7.4

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??
American Airlines
7.2
Good
10,000 reviews
United Airlines
7.4
Good
8,608 reviews

Crew

8.1

Food

6.6

Comfort

7.3

Entertainment

7.0

Boarding

7.7

Overall

7.4

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??
Air Canada
7.0
Good
8,960 reviews
United Airlines
7.4
Good
8,608 reviews

Crew

8.1

Food

6.6

Comfort

7.3

Entertainment

7.0

Boarding

7.7

Overall

7.4

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??

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. 2 airlines have flights to London Heathrow from Harlingen Valley Intl on a regular basis.

  • What are the cheapest airlines flying from Harlingen, Texas to London Heathrow Airport round-trip?

    Our cheapest airline available from Harlingen, Texas to London Heathrow Airport is United Airlines. Our recent data shows that you can find tickets from as low as $751 on this airline. Additional options worth looking into are American Airlines and Air Canada, starting at $753 and $1,136 round-trip.

  • 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.

  • 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 $661). Flying from Harlingen, Texas to London Heathrow Airport in June is currently the most expensive (average of $1,115). 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

Traveling to a place near Harlingen?

Book flights to Harlingen if you plan to visit one of these locations
Hounslow
Hayes
Thornton Heath
Luton
Wembley
Harrow
Horley
Canterbury
Gatwick
Dover
Orpington
Watford
Milton Keynes
Northampton
Stratford-upon-Avon
Croydon
Borehamwood
Bromley
Folkestone
Ilford

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Alternative routes for Harlingen to Heathrow

See prices for flight routes from nearby airports that may be better suited for you.
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Top 2 airlines flying from Harlingen to Heathrow

Discover the top 2 airlines that operate flights from Harlingen to Heathrow. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated March 26, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$610Average$851FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$751Average$905FlexibilityNo cancel feeOn-time69%
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