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 12h 18m. Fly via United Airlines or American Airlines 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.

In terms of precipitation, rainfall in London Heathrow Airport ranges from 40.0 - 70.0 inches per month. January is typically the wettest month, when rainfall can reach 70.0 mm. July is typically the driest time to visit London Heathrow Airport when rainfall is around 40.0 mm.

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 17.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 4.0 C).

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

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Harlingen, Texas to London Heathrow Airport as you normally would.

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.

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.

£588+ Cheap Flights from Harlingen, Texas to London Heathrow Airport

Cheap flight deals from Harlingen to Heathrow

Round-trip from	£588

United Airlines
9/10-16/10
3 total stops
45h 34m total
Harlingen to London

Search Deals

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 26 August 2025.

Thu 9/1017:17HRL - LHR

1 stop12h 18mUnited Airlines

Thu 16/1016:25LHR - HRL

2 stops33h 16mUnited Airlines

Deal found 25/8£588

Mon 22/918:35HRL - LHR

1 stop13h 50mAmerican Airlines

Mon 29/908:20LHR - HRL

1 stop15h 45mAmerican Airlines

Deal found 25/8£592

Mon 22/905:00HRL - LHR

2 stops22h 35mMultiple Airlines

Mon 29/915:50LHR - HRL

2 stops30h 23mMultiple Airlines

Deal found 25/8£595

Wed 3/1212:08HRL - LHR

1 stop12h 42mIberia

Fri 12/1214:55LHR - HRL

1 stop13h 17mIberia

Deal found 23/8£718

Thu 11/911:55HRL - LHR

1 stop13h 45mUnited Airlines

Mon 29/908:30LHR - HRL

2 stops20h 48mUnited Airlines

Deal found 24/8£761

Thu 11/910:11HRL - LHR

1 stop18h 39mAmerican Airlines

Mon 29/915:10LHR - HRL

1 stop13h 47mAmerican Airlines

Deal found 25/8£768

Sun 31/818:20HRL - LHR

1 stop12h 25mIberia

Sun 7/910:30LHR - HRL

1 stop13h 19mIberia

Deal found 24/8£1,405

Best flights from Harlingen to Heathrow
Discover carefully curated flight deals from Harlingen to Heathrow that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 26 August 2025.

Thu 9/1017:17HRL - LHR

1 stop12h 18mUnited Airlines

Thu 16/1016:25LHR - HRL

2 stops33h 16mUnited Airlines

Deal found 25/8£588

Mon 22/918:35HRL - LHR

1 stop13h 50mAmerican Airlines

Mon 29/908:20LHR - HRL

1 stop15h 45mAmerican Airlines

Deal found 25/8£592

Mon 22/914:05HRL - LHR

1 stop15h 30mMultiple Airlines

Mon 29/915:50LHR - HRL

2 stops33h 51mMultiple Airlines

Deal found 25/8£595

Wed 3/1212:08HRL - LHR

1 stop12h 42mIberia

Fri 12/1214:55LHR - HRL

1 stop13h 17mIberia

Deal found 23/8£718

Thu 11/907:00HRL - LHR

2 stops17h 55mUnited Airlines

Mon 29/912:00LHR - HRL

2 stops17h 18mUnited Airlines

Deal found 24/8£761

Thu 11/910:11HRL - LHR

1 stop18h 39mAmerican Airlines

Mon 29/915:10LHR - HRL

1 stop13h 47mAmerican Airlines

Deal found 25/8£768

Cheapflights Fare Finder

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

HarlingenLondon

HRL - LHR

HRLLHR

Harlingen Valley Intl

Thu 9/10

17:17-11:35

1 stop12h 18m

London Heathrow

Thu 16/10

16:25-19:41

2 stops33h 16m

£588

HarlingenLondon

HRL - LHR

HRLLHR

Harlingen Valley Intl

Mon 22/9

18:35-14:25

1 stop13h 50m

London Heathrow

Mon 29/9

08:20-18:05

1 stop15h 45m

£592

HarlingenLondon

HRL - LHR

HRLLHR

Harlingen Valley Intl

Mon 22/9

14:05-11:35

1 stop15h 30m

London Heathrow

Mon 29/9

15:50-19:41

2 stops33h 51m

£595

HarlingenLondon

HRL - LHR

HRLLHR

Harlingen Valley Intl

Wed 3/12

12:08-06:50

1 stop12h 42m

London Heathrow

Fri 12/12

14:55-22:12

1 stop13h 17m

£718

HarlingenLondon

HRL - LHR

HRLLHR

Harlingen Valley Intl

Thu 11/9

07:00-06:55

2 stops17h 55m

London Heathrow

Mon 29/9

12:00-23:18

2 stops17h 18m

£761

HarlingenLondon

HRL - LHR

HRLLHR

Harlingen Valley Intl

Thu 11/9

10:11-10:50

1 stop18h 39m

London Heathrow

Mon 29/9

15:10-22:57

1 stop13h 47m

£768

Flights are sorted by cheapest return flights first.

Deals found on 25/8

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, January is the cheapest month in which you can book a flight from Harlingen, Texas to London Heathrow Airport (average of £112). Flying from Harlingen, Texas to London Heathrow Airport in August is currently the most expensive (average of £164). 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

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 12h 18m. Fly via United Airlines or American Airlines 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.
What is the cheapest month to book a flight from Harlingen, Texas to London Heathrow Airport?
Currently, January is the cheapest month in which you can book a flight from Harlingen, Texas to London Heathrow Airport (average of £112). Flying from Harlingen, Texas to London Heathrow Airport in August is currently the most expensive (average of £164). 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.

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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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Cheap flights from Harlingen, Texas to London Heathrow Airport from £588

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 9/10. Fares are subject to change and may not be available on all flights or dates of travel.

Cheap flight deals from Harlingen to Heathrow

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Find flight deals from Harlingen to Heathrow

Cheapest flights from Harlingen to HeathrowExplore 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 26 August 2025.

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 26 August 2025.

Cheapflights Fare Finder

Use the filters below to find and compare flights from Harlingen to London Heathrow Airport that are best for you.

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.

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?

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?

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

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

How can I find direct flights from Harlingen to Heathrow?

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

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

Travelling to a place near London Heathrow Airport?

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Alternative routes for Harlingen to Heathrow

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

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

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

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

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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 26 August 2025.