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

Price Alerts will notify you by email when the price for flights to Harlingen 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 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.

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.

£947 Cheap Flights from London Heathrow Airport to Harlingen in 2026/27

Find the cheapest flights from London Heathrow Airport to Harlingen

Return

One-way

Cheap return flights

Enter your travel dates to find the best prices.

07:30 - 22:48LHR London Heathrow-HRL Harlingen Valley Intl

21h 18m2 stops Frankfurt am Main Houston George Bush Intcntl

17:25 - 07:40HRL Harlingen Valley Intl-LHR London Heathrow

32h 15m1 stop Houston George Bush Intcntl

£947United Airlines

Wed, 4 Nov - Sun, 8 Nov

07:30 - 22:48LHR London Heathrow-HRL Harlingen Valley Intl

21h 18m2 stops Frankfurt am Main Houston George Bush Intcntl

17:25 - 07:40HRL Harlingen Valley Intl-LHR London Heathrow

32h 15m1 stop Houston George Bush Intcntl

£948United Airlines

Wed, 4 Nov - Sun, 8 Nov

07:30 - 13:21LHR London Heathrow-HRL Harlingen Valley Intl

35h 51m2 stops Frankfurt am Main Houston George Bush Intcntl

12:00 - 12:00HRL Harlingen Valley Intl-LHR London Heathrow

18h 00m2 stops Houston George Bush Intcntl Chicago O'Hare Intl

£964United Airlines

Thu, 26 Nov - Thu, 3 Dec

06:35 - 22:48LHR London Heathrow-HRL Harlingen Valley Intl

21h 13m2 stops Munich Franz Josef Strauss Houston George Bush Intcntl

17:25 - 07:40HRL Harlingen Valley Intl-LHR London Heathrow

32h 15m1 stop Houston George Bush Intcntl

£977United Airlines

Thu, 29 Oct - Mon, 2 Nov

10:00 - 16:01LHR London Heathrow-HRL Harlingen Valley Intl

36h 01m1 stop Houston George Bush Intcntl

14:00 - 07:40HRL Harlingen Valley Intl-LHR London Heathrow

11h 40m1 stop Houston George Bush Intcntl

£988United Airlines

Thu, 26 Nov - Thu, 3 Dec

10:00 - 22:48LHR London Heathrow-HRL Harlingen Valley Intl

18h 48m1 stop Houston George Bush Intcntl

11:25 - 10:15HRL Harlingen Valley Intl-LHR London Heathrow

16h 50m1 stop Houston George Bush Intcntl

£1,002United Airlines

Wed, 4 Nov - Sun, 8 Nov

10:00 - 22:48LHR London Heathrow-HRL Harlingen Valley Intl

18h 48m1 stop Houston George Bush Intcntl

11:25 - 10:15HRL Harlingen Valley Intl-LHR London Heathrow

16h 50m1 stop Houston George Bush Intcntl

£1,003United Airlines

Wed, 4 Nov - Sun, 8 Nov

13:30 - 22:50LHR London Heathrow-HRL Harlingen Valley Intl

14h 20m1 stop Dallas/Fort Worth

05:40 - 08:15HRL Harlingen Valley Intl-LHR London Heathrow

20h 35m1 stop Dallas/Fort Worth

£1,061Iberia

Thu, 29 Oct - Mon, 2 Nov

07:30 - 21:59LHR London Heathrow-HRL Harlingen Valley Intl

20h 29m2 stops Frankfurt am Main Houston George Bush Intcntl

05:05 - 07:40HRL Harlingen Valley Intl-LHR London Heathrow

20h 35m1 stop Houston George Bush Intcntl

£1,229United Airlines

Thu, 24 Dec - Sat, 2 Jan

10:05 - 22:54LHR London Heathrow-HRL Harlingen Valley Intl

18h 49m1 stop Dallas/Fort Worth

19:21 - 06:50HRL Harlingen Valley Intl-LHR London Heathrow

29h 29m1 stop Dallas/Fort Worth

£1,232Iberia

Thu, 24 Dec - Sat, 2 Jan

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United Airlines flights from London Heathrow Airport to Harlingen

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

United Airlines

4 Nov

LHR07:30London Heathrow

21h 18m

2 stops

HRL22:48Harlingen Valley Intl

8 Nov

HRL17:25Harlingen Valley Intl

32h 15m

1 stop

LHR07:40London Heathrow

£947

United Airlines

4 Nov

LHR07:30London Heathrow

21h 18m

2 stops

HRL22:48Harlingen Valley Intl

8 Nov

HRL17:25Harlingen Valley Intl

32h 15m

1 stop

LHR07:40London Heathrow

£948

United Airlines

26 Nov

LHR07:30London Heathrow

35h 51m

2 stops

HRL13:21Harlingen Valley Intl

3 Dec

HRL12:00Harlingen Valley Intl

18h 00m

2 stops

LHR12:00London Heathrow

£964

Iberia flights from London Heathrow Airport to Harlingen

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

Iberia

29 Oct

LHR13:30London Heathrow

14h 20m

1 stop

HRL22:50Harlingen Valley Intl

2 Nov

HRL05:40Harlingen Valley Intl

20h 35m

1 stop

LHR08:15London Heathrow

£1,061

Iberia

24 Dec

LHR10:05London Heathrow

18h 49m

1 stop

HRL22:54Harlingen Valley Intl

2 Jan

HRL19:21Harlingen Valley Intl

29h 29m

1 stop

LHR06:50London Heathrow

£1,232

momondo Fare Finder

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

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

LondonHarlingen

LHR London Heathrow - HRL Harlingen Valley Intl

LHRHRL

London Heathrow

Wed 4/11

07:30-22:48

2 stops21h 18m

Harlingen Valley Intl

Sun 8/11

17:25-07:40

1 stop32h 15m

£947

LondonHarlingen

LHR London Heathrow - HRL Harlingen Valley Intl

LHRHRL

London Heathrow

Wed 4/11

07:30-22:48

2 stops21h 18m

Harlingen Valley Intl

Sun 8/11

17:25-07:40

1 stop32h 15m

£948

LondonHarlingen

LHR London Heathrow - HRL Harlingen Valley Intl

LHRHRL

London Heathrow

Thu 26/11

07:30-13:21

2 stops35h 51m

Harlingen Valley Intl

Thu 3/12

12:00-12:00

2 stops18h 00m

£964

LondonHarlingen

LHR London Heathrow - HRL Harlingen Valley Intl

LHRHRL

London Heathrow

Thu 29/10

06:35-22:48

2 stops21h 13m

Harlingen Valley Intl

Mon 2/11

17:25-07:40

1 stop32h 15m

£977

LondonHarlingen

LHR London Heathrow - HRL Harlingen Valley Intl

LHRHRL

London Heathrow

Thu 26/11

10:00-16:01

1 stop36h 01m

Harlingen Valley Intl

Thu 3/12

14:00-07:40

1 stop11h 40m

£988

LondonHarlingen

LHR London Heathrow - HRL Harlingen Valley Intl

LHRHRL

London Heathrow

Wed 4/11

10:00-22:48

1 stop18h 48m

Harlingen Valley Intl

Sun 8/11

11:25-10:15

1 stop16h 50m

£1,002

LondonHarlingen

LHR London Heathrow - HRL Harlingen Valley Intl

LHRHRL

London Heathrow

Wed 4/11

10:00-22:48

1 stop18h 48m

Harlingen Valley Intl

Sun 8/11

11:25-10:15

1 stop16h 50m

£1,002

Fastest return journey

LondonHarlingen

LHR London Heathrow - HRL Harlingen Valley Intl

LHRHRL

London Heathrow

Thu 29/10

13:30-22:50

1 stop14h 20m

Harlingen Valley Intl

Mon 2/11

05:40-08:15

1 stop20h 35m

£1,061

LondonHarlingen

LHR London Heathrow - HRL Harlingen Valley Intl

LHRHRL

London Heathrow

Thu 24/12

07:30-21:59

2 stops20h 29m

Harlingen Valley Intl

Sat 2/1

05:05-07:40

1 stop20h 35m

£1,229

LondonHarlingen

LHR London Heathrow - HRL Harlingen Valley Intl

LHRHRL

London Heathrow

Thu 24/12

10:05-22:54

1 stop18h 49m

Harlingen Valley Intl

Sat 2/1

19:21-06:50

1 stop29h 29m

£1,232

Flights are sorted by cheapest return flights first.

Sorted by cheapest first

When to book flights from London Heathrow Airport to Harlingen

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

Estimated return price

Cheap London Heathrow Airport to Harlingen (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

Best price found	£947
Fastest flight time	20h 29m
Direct flights	None

The best flight deal from London Heathrow Airport to Harlingen found on momondo in the last 72 hours is £947

The fastest flight from London Heathrow Airport to Harlingen takes 20h 29m

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

Search flight deals

Frequently asked questions about flying from London Heathrow Airport to Harlingen

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. 20h 29m 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

How do I get Price Alerts for flights from London Heathrow Airport to Harlingen?
Price Alerts will notify you by email when the price for flights to Harlingen 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 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.