How do I get Price Alerts for flights from London Heathrow Airport to Harlingen, Texas?

Price Alerts will notify you by email when the price for flights to Harlingen, Texas from London Heathrow Airport decreases. To activate this, select your desired travel dates and search for offers. While browsing through offers you’ll see the Price Alert widget toggle. Click it to turn on notifications.

How does momondo find its flight prices?

We show prices from over 700+ competitors with a single click. With options from airlines and OTAs from across our 30 international markets, we are able to show you a diverse range of deals to create your adventure.

When did momondo last update prices for flights from London Heathrow Airport to Harlingen Valley Intl Airport?

Prices for flights from London Heathrow Airport to Harlingen Valley Intl Airport were last updated today.

How old do you have to be to fly from London Heathrow Airport to Harlingen Valley Intl Airport?

Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from London Heathrow Airport to Harlingen Valley Intl Airport.

What documentation or ID do you need to fly to Harlingen Valley Intl Airport?

The travel and health documents you'll need for your trip to Harlingen Valley Intl Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Harlingen Valley Intl Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

£814 Cheap Flights from London Heathrow Airport to Harlingen, Texas in 2026

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Find the cheapest flights from London Heathrow Airport to Harlingen

Round-trip

One-way

Last minute

Cheap return flights

Enter your travel dates to find the best prices.

10:00 - 19:49

LHR

HRL

15h 49m

1 stop

17:20 - 11:35

HRL

LHR

12h 15m

1 stop

£814United Airlines

Fri, 10 Jul - Mon, 20 Jul

10:25 - 21:44

LHR

HRL

17h 19m

2 stops

17:16 - 07:40

HRL

LHR

32h 24m

1 stop

£989United Airlines

Wed, 2 Sep - Sun, 6 Sep

08:00 - 19:29

LHR

HRL

17h 29m

2 stops

17:16 - 07:40

HRL

LHR

32h 24m

1 stop

£992United Airlines

Wed, 2 Sep - Sun, 6 Sep

07:45 - 19:29

LHR

HRL

17h 44m

2 stops

14:00 - 11:35

HRL

LHR

15h 35m

1 stop

£1,016United Airlines

Wed, 2 Sep - Sun, 6 Sep

10:00 - 19:29

LHR

HRL

15h 29m

1 stop

14:00 - 11:35

HRL

LHR

15h 35m

1 stop

£1,017United Airlines

Wed, 2 Sep - Sun, 6 Sep

14:10 - 15:59

LHR

HRL

31h 49m

2 stops

20:04 - 14:25

HRL

LHR

12h 21m

1 stop

£1,018Multiple Airlines

Fri, 10 Jul - Mon, 20 Jul

09:30 - 21:44

LHR

HRL

18h 14m

2 stops

14:00 - 10:40

HRL

LHR

14h 40m

2 stops

£1,019United Airlines

Wed, 2 Sep - Sun, 6 Sep

09:30 - 21:44

LHR

HRL

18h 14m

2 stops

14:00 - 10:40

HRL

LHR

14h 40m

2 stops

£1,022United Airlines

Wed, 2 Sep - Sun, 6 Sep

06:15 - 19:34

LHR

HRL

19h 19m

2 stops

17:22 - 17:15

HRL

LHR

17h 53m

2 stops

£1,026Iberia

Fri, 10 Jul - Mon, 20 Jul

08:55 - 16:50

LHR

HRL

13h 55m

1 stop

17:22 - 14:25

HRL

LHR

15h 03m

1 stop

£1,079Iberia

Fri, 10 Jul - Mon, 20 Jul

Iberia flights from London Heathrow Airport to Harlingen, Texas

Our best Iberia deals on London Heathrow Airport to Harlingen, Texas flight tickets

Iberia

10 Jul

LHR06:15London Heathrow

19h 19m

2 stops

HRL19:34Harlingen Valley Intl

20 Jul

HRL17:22Harlingen Valley Intl

17h 53m

2 stops

LHR17:15London Heathrow

£1,026

Iberia

10 Jul

LHR08:55London Heathrow

13h 55m

1 stop

HRL16:50Harlingen Valley Intl

20 Jul

HRL17:22Harlingen Valley Intl

15h 03m

1 stop

LHR14:25London Heathrow

£1,079

Iberia

3 Apr

LHR09:15London Heathrow

30h 57m

2 stops

HRL10:12Harlingen Valley Intl

12 Apr

HRL19:53Harlingen Valley Intl

28h 27m

1 stop

LHR06:20London Heathrow

£1,656

United Airlines flights from London Heathrow Airport to Harlingen, Texas

Our best United Airlines deals on London Heathrow Airport to Harlingen, Texas flight tickets

United Airlines

10 Jul

LHR10:00London Heathrow

15h 49m

1 stop

HRL19:49Harlingen Valley Intl

20 Jul

HRL17:20Harlingen Valley Intl

12h 15m

1 stop

LHR11:35London Heathrow

£814

United Airlines

2 Sept

LHR10:25London Heathrow

17h 19m

2 stops

HRL21:44Harlingen Valley Intl

6 Sept

HRL17:16Harlingen Valley Intl

32h 24m

1 stop

LHR07:40London Heathrow

£989

United Airlines

2 Sept

LHR08:00London Heathrow

17h 29m

2 stops

HRL19:29Harlingen Valley Intl

6 Sept

HRL17:16Harlingen Valley Intl

32h 24m

1 stop

LHR07:40London Heathrow

£992

momondo Fare Finder

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

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

Fastest return journey

LondonHarlingen

LHR - HRL

LHRHRL

London Heathrow

Fri 10/7

10:00-19:49

1 stop15h 49m

Harlingen Valley Intl

Mon 20/7

17:20-11:35

1 stop12h 15m

£814

LondonHarlingen

LHR - HRL

LHRHRL

London Heathrow

Wed 2/9

10:25-21:44

2 stops17h 19m

Harlingen Valley Intl

Sun 6/9

17:16-07:40

1 stop32h 24m

£989

LondonHarlingen

LHR - HRL

LHRHRL

London Heathrow

Wed 2/9

08:00-19:29

2 stops17h 29m

Harlingen Valley Intl

Sun 6/9

17:16-07:40

1 stop32h 24m

£992

LondonHarlingen

LHR - HRL

LHRHRL

London Heathrow

Wed 2/9

07:45-19:29

2 stops17h 44m

Harlingen Valley Intl

Sun 6/9

14:00-11:35

1 stop15h 35m

£1,016

LondonHarlingen

LHR - HRL

LHRHRL

London Heathrow

Wed 2/9

10:00-19:29

1 stop15h 29m

Harlingen Valley Intl

Sun 6/9

14:00-11:35

1 stop15h 35m

£1,017

LondonHarlingen

LHR - HRL

LHRHRL

London Heathrow

Fri 10/7

14:10-15:59

2 stops31h 49m

Harlingen Valley Intl

Mon 20/7

20:04-14:25

1 stop12h 21m

£1,018

LondonHarlingen

LHR - HRL

LHRHRL

London Heathrow

Wed 2/9

09:30-21:44

2 stops18h 14m

Harlingen Valley Intl

Sun 6/9

14:00-10:40

2 stops14h 40m

£1,019

LondonHarlingen

LHR - HRL

LHRHRL

London Heathrow

Wed 2/9

09:30-21:44

2 stops18h 14m

Harlingen Valley Intl

Sun 6/9

14:00-10:40

2 stops14h 40m

£1,022

LondonHarlingen

LHR - HRL

LHRHRL

London Heathrow

Fri 10/7

06:15-19:34

2 stops19h 19m

Harlingen Valley Intl

Mon 20/7

17:22-17:15

2 stops17h 53m

£1,026

LondonHarlingen

LHR - HRL

LHRHRL

London Heathrow

Fri 10/7

08:55-16:50

1 stop13h 55m

Harlingen Valley Intl

Mon 20/7

17:22-14:25

1 stop15h 03m

£1,079

Flights are sorted by cheapest return flights first.

Sorted by cheapest first

When to book flights from London Heathrow Airport to Harlingen, Texas

Are you open to changing your travel dates? Check out the ideal times to fly from London Heathrow Airport to Harlingen, Texas according to our flight data. Find out which month and days have the cheapest flights.

Estimated return price

Cheap London Heathrow Airport to Harlingen, Texas (LHR to HRL) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from London Heathrow Airport to Harlingen, Texas

Fastest flight time	15h 49m
Direct flights	None

The fastest flight from London Heathrow Airport to Harlingen, Texas takes 15h 49m

There are no direct flights from London Heathrow Airport to Harlingen, Texas. There are no popular flight routes from London Heathrow Airport to Harlingen, Texas.

Search flight deals

Frequently asked questions about flying from London Heathrow Airport to Harlingen, Texas

How far is London Heathrow to Harlingen Valley Intl by plane?
London Heathrow and Harlingen Valley Intl are 5112.7 mi apart from one another. 15h 49m is a normal flight duration for this route.
When did momondo last update prices for flights from London Heathrow Airport to Harlingen Valley Intl Airport?
Prices for flights from London Heathrow Airport to Harlingen Valley Intl Airport were last updated today.
How old do you have to be to fly from London Heathrow Airport to Harlingen Valley Intl Airport?
Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from London Heathrow Airport to Harlingen Valley Intl Airport.
What documentation or ID do you need to fly to Harlingen Valley Intl Airport?
The travel and health documents you'll need for your trip to Harlingen Valley Intl Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Harlingen Valley Intl Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

Frequently asked questions about flying from London Heathrow Airport to Harlingen, Texas

How do I get Price Alerts for flights from London Heathrow Airport to Harlingen, Texas?
Price Alerts will notify you by email when the price for flights to Harlingen, Texas from London Heathrow Airport decreases. To activate this, select your desired travel dates and search for offers. While browsing through offers you’ll see the Price Alert widget toggle. Click it to turn on notifications.
How can I save money on flights from London Heathrow Airport to Harlingen, Texas with momondo?
By using tools like our “Price Calendar”, you can see the best days for return flights on your travels. Our “Price Forecast” tool uses AI to predict whether you should purchase or hold off on booking for potentially cheaper prices. Explore shows you all flight options from a city or airport to build your own unique adventure. The Discover blog also provides valuable insights for saving money while booking your experience. After searching you can toggle on “Price Alerts” to track prices for your desired flight and book at the ideal moment.
How does momondo find its flight prices?
We show prices from over 700+ competitors with a single click. With options from airlines and OTAs from across our 30 international markets, we are able to show you a diverse range of deals to create your adventure.

Why use momondo?

Why should I use momondo to find a flight deal from London to Harlingen?

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from London to Harlingen . Millions of users trust and use momondo every year so you are in good hands.

Can I find flights from London to Harlingen with flexible booking policies on momondo?

Yes. All flights to Harlingen from London on momondo can be compared and filtered by various policies on offer, including flexible booking.

How can momondo help me find flights from London to Harlingen?

momondo provides multiple filters to help you find the best flight to Harlingen from London. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

I’m not ready to book a flight from London to Harlingen right now. Can momondo alert me if prices change?

Yes. momondo can track prices for London to Harlingen flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.