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.

£862 Cheap Flights from London Heathrow Airport to Harlingen in 2026

Find the cheapest flights from London Heathrow Airport to Harlingen

Return

One-way

Last minute

Cheap return flights

Enter your travel dates to find the best prices.

09:30 - 22:48LHR London Heathrow-HRL Harlingen Valley Intl

19h 18m2 stops Frankfurt am Main Houston George Bush Intcntl

07:10 - 07:50HRL Harlingen Valley Intl-LHR London Heathrow

18h 40m1 stop Houston George Bush Intcntl

£862United Airlines

Wed, 4 Nov - Sun, 8 Nov

07:30 - 13:23LHR London Heathrow-HRL Harlingen Valley Intl

35h 53m2 stops Frankfurt am Main Houston George Bush Intcntl

07:15 - 05:55HRL Harlingen Valley Intl-LHR London Heathrow

16h 40m2 stops Houston George Bush Intcntl Newark

£862United Airlines

Fri, 9 Oct - Fri, 16 Oct

07:30 - 21:52LHR London Heathrow-HRL Harlingen Valley Intl

20h 22m2 stops Frankfurt am Main Houston George Bush Intcntl

17:18 - 07:55HRL Harlingen Valley Intl-LHR London Heathrow

32h 37m1 stop Houston George Bush Intcntl

£862United Airlines

Fri, 9 Oct - Fri, 16 Oct

09:30 - 22:48LHR London Heathrow-HRL Harlingen Valley Intl

19h 18m2 stops Frankfurt am Main Houston George Bush Intcntl

07:10 - 08:25HRL Harlingen Valley Intl-LHR London Heathrow

19h 15m2 stops Houston George Bush Intcntl Newark

£869United Airlines

Wed, 4 Nov - Sun, 8 Nov

10:00 - 19:47LHR London Heathrow-HRL Harlingen Valley Intl

15h 47m1 stop Houston George Bush Intcntl

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

16h 50m1 stop Houston George Bush Intcntl

£886United Airlines

Wed, 4 Nov - Sun, 8 Nov

07:30 - 13:23LHR London Heathrow-HRL Harlingen Valley Intl

35h 53m2 stops Frankfurt am Main Houston George Bush Intcntl

05:05 - 07:45HRL Harlingen Valley Intl-LHR London Heathrow

20h 40m1 stop Houston George Bush Intcntl

£911United Airlines

Mon, 5 Oct - Mon, 12 Oct

07:30 - 15:59LHR London Heathrow-HRL Harlingen Valley Intl

38h 29m2 stops Frankfurt am Main Houston George Bush Intcntl

07:15 - 06:55HRL Harlingen Valley Intl-LHR London Heathrow

17h 40m2 stops Houston George Bush Intcntl Washington, D.C. Dulles Intl

£911United Airlines

Mon, 5 Oct - Mon, 12 Oct

10:05 - 22:59LHR London Heathrow-HRL Harlingen Valley Intl

18h 54m1 stop Dallas/Fort Worth

14:47 - 10:00HRL Harlingen Valley Intl-LHR London Heathrow

13h 13m1 stop Dallas/Fort Worth

£926Iberia

Thu, 12 Nov - Tue, 1 Dec

13:00 - 16:01LHR London Heathrow-HRL Harlingen Valley Intl

33h 01m2 stops Montreal Pierre Elliott Trudeau Intl Houston George Bush Intcntl

14:47 - 12:00HRL Harlingen Valley Intl-LHR London Heathrow

15h 13m1 stop Dallas/Fort Worth

£927Multiple Airlines

Thu, 12 Nov - Tue, 1 Dec

08:25 - 22:59LHR London Heathrow-HRL Harlingen Valley Intl

20h 34m2 stops Dublin Dallas/Fort Worth

05:40 - 12:05HRL Harlingen Valley Intl-LHR London Heathrow

24h 25m2 stops Dallas/Fort Worth Miami

£930Finnair

Thu, 12 Nov - Tue, 1 Dec

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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

9 Oct

LHR07:30London Heathrow

35h 53m

2 stops

HRL13:23Harlingen Valley Intl

16 Oct

HRL07:15Harlingen Valley Intl

16h 40m

2 stops

LHR05:55London Heathrow

£862

United Airlines

4 Nov

LHR09:30London Heathrow

19h 18m

2 stops

HRL22:48Harlingen Valley Intl

8 Nov

HRL07:10Harlingen Valley Intl

17h 10m

2 stops

LHR06:20London Heathrow

£869

United Airlines

4 Nov

LHR10:00London Heathrow

15h 47m

1 stop

HRL19:47Harlingen Valley Intl

8 Nov

HRL11:25Harlingen Valley Intl

16h 50m

1 stop

LHR10:15London Heathrow

£886

Iberia flights from London Heathrow Airport to Harlingen

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

Iberia

12 Nov

LHR10:05London Heathrow

18h 54m

1 stop

HRL22:59Harlingen Valley Intl

1 Dec

HRL14:47Harlingen Valley Intl

13h 13m

1 stop

LHR10:00London Heathrow

£926

Iberia

8 Oct

LHR08:55London Heathrow

15h 17m

1 stop

HRL18:12Harlingen Valley Intl

15 Oct

HRL18:42Harlingen Valley Intl

12h 03m

1 stop

LHR12:45London Heathrow

£982

Iberia

9 Oct

LHR14:25London Heathrow

25h 43m

1 stop

HRL10:08Harlingen Valley Intl

16 Oct

HRL10:40Harlingen Valley Intl

13h 40m

1 stop

LHR06:20London Heathrow

£1,013

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

09:30-22:48

2 stops19h 18m

Harlingen Valley Intl

Sun 8/11

07:10-07:50

1 stop18h 40m

£862

LondonHarlingen

LHR London Heathrow - HRL Harlingen Valley Intl

LHRHRL

London Heathrow

Fri 9/10

07:30-13:23

2 stops35h 53m

Harlingen Valley Intl

Fri 16/10

07:15-05:55

2 stops16h 40m

£862

LondonHarlingen

LHR London Heathrow - HRL Harlingen Valley Intl

LHRHRL

London Heathrow

Fri 9/10

07:30-21:52

2 stops20h 22m

Harlingen Valley Intl

Fri 16/10

17:18-07:55

1 stop32h 37m

£862

LondonHarlingen

LHR London Heathrow - HRL Harlingen Valley Intl

LHRHRL

London Heathrow

Wed 4/11

09:30-22:48

2 stops19h 18m

Harlingen Valley Intl

Sun 8/11

07:10-08:25

2 stops19h 15m

£869

LondonHarlingen

LHR London Heathrow - HRL Harlingen Valley Intl

LHRHRL

London Heathrow

Wed 4/11

10:00-19:47

1 stop15h 47m

Harlingen Valley Intl

Sun 8/11

11:25-10:15

1 stop16h 50m

£886

LondonHarlingen

LHR London Heathrow - HRL Harlingen Valley Intl

LHRHRL

London Heathrow

Mon 5/10

07:30-13:23

2 stops35h 53m

Harlingen Valley Intl

Mon 12/10

05:05-07:45

1 stop20h 40m

£911

LondonHarlingen

LHR London Heathrow - HRL Harlingen Valley Intl

LHRHRL

London Heathrow

Mon 5/10

07:30-15:59

2 stops38h 29m

Harlingen Valley Intl

Mon 12/10

07:15-06:55

2 stops17h 40m

£911

Fastest return journey

LondonHarlingen

LHR London Heathrow - HRL Harlingen Valley Intl

LHRHRL

London Heathrow

Thu 12/11

10:05-22:59

1 stop18h 54m

Harlingen Valley Intl

Tue 1/12

14:47-10:00

1 stop13h 13m

£926

LondonHarlingen

LHR London Heathrow - HRL Harlingen Valley Intl

LHRHRL

London Heathrow

Thu 12/11

13:00-16:01

2 stops33h 01m

Harlingen Valley Intl

Tue 1/12

14:47-12:00

1 stop15h 13m

£927

LondonHarlingen

LHR London Heathrow - HRL Harlingen Valley Intl

LHRHRL

London Heathrow

Thu 12/11

08:25-22:59

2 stops20h 34m

Harlingen Valley Intl

Tue 1/12

05:40-12:05

2 stops24h 25m

£930

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	£862
Fastest flight time	16h 39m
Direct flights	None

The best flight deal from London Heathrow Airport to Harlingen found on momondo in the last 72 hours is £862

The fastest flight from London Heathrow Airport to Harlingen takes 16h 39m

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. 16h 39m 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.