How do I get Price Alerts for flights from Harlingen to United Kingdom?

You can take advantage of momondo’s Price Alerts by first searching for your flights to Harlingen from United Kingdom . Flight offers will be shown to you in real-time. From there you can create a Price Alert by using our on-site widget.

How can I save money on flights from Harlingen to United Kingdom with momondo?

With “Price Forecast”, learn how soon you should book your flight in advance. Down to the day of week and time of day, our information can inform you on the ideal time to book to save on your travel. Our “Price Calendar” shows you at a quick glance when to book your travel for lower rates. By setting “Price Alerts” you can monitor changes in price and target the ideal time to book. Search for your trip destination by budget amount via our “Explore” feature. Whether you’re looking for ideas for your next travel adventure or cost-cutting tips, our “Discover” content is a great place to start.

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 Harlingen Valley Intl Airport to United Kingdom?

Prices for flights from Harlingen Valley Intl Airport to United Kingdom are updated daily.

How old do you have to be to fly from Harlingen Valley Intl Airport to United Kingdom?

The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Harlingen Valley Intl Airport to United Kingdom.

What documentation or ID do you need to fly to United Kingdom?

The travel and health documents required for your trip to United Kingdom can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at United Kingdom. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

£627 Cheap Flights from Harlingen to the United Kingdom in 2026

Find the cheapest flights from Harlingen to the United Kingdom

Return

Cheap return flights

Enter your travel dates to find the best prices.

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

15h 13m1 stop Dallas/Fort Worth

19:40 - 10:13LHR London Heathrow-HRL Harlingen Valley Intl

20h 33m2 stops Madrid Barajas Dallas/Fort Worth

£627Iberia

Wed, 4 Nov - Wed, 11 Nov

07:10 - 10:15HRL Harlingen Valley Intl-LHR London Heathrow

21h 05m1 stop Houston George Bush Intcntl

06:35 - 19:47LHR London Heathrow-HRL Harlingen Valley Intl

19h 12m2 stops Munich Franz Josef Strauss Houston George Bush Intcntl

£648United Airlines

Sun, 15 Nov - Thu, 19 Nov

07:10 - 10:15HRL Harlingen Valley Intl-LHR London Heathrow

21h 05m1 stop Houston George Bush Intcntl

06:35 - 19:47LHR London Heathrow-HRL Harlingen Valley Intl

19h 12m2 stops Munich Franz Josef Strauss Houston George Bush Intcntl

£649United Airlines

Sun, 15 Nov - Thu, 19 Nov

05:05 - 07:10HRL Harlingen Valley Intl-LHR London Heathrow

20h 05m2 stops Houston George Bush Intcntl Montreal Pierre Elliott Trudeau Intl

06:35 - 19:47LHR London Heathrow-HRL Harlingen Valley Intl

19h 12m2 stops Munich Franz Josef Strauss Houston George Bush Intcntl

£650United Airlines

Sun, 15 Nov - Thu, 19 Nov

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

15h 13m1 stop Dallas/Fort Worth

08:20 - 18:11LHR London Heathrow-HRL Harlingen Valley Intl

15h 51m1 stop Dallas/Fort Worth

£652Iberia

Wed, 4 Nov - Wed, 11 Nov

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

18h 50m2 stops Houston George Bush Intcntl Chicago O'Hare Intl

06:35 - 19:47LHR London Heathrow-HRL Harlingen Valley Intl

19h 12m2 stops Munich Franz Josef Strauss Houston George Bush Intcntl

£652United Airlines

Sun, 15 Nov - Thu, 19 Nov

15:35 - 14:25HRL Harlingen Valley Intl-LHR London Heathrow

16h 50m1 stop Dallas/Fort Worth

07:50 - 09:58LHR London Heathrow-HRL Harlingen Valley Intl

32h 08m2 stops Madrid Barajas Dallas/Fort Worth

£658Iberia

Mon, 21 Sep - Tue, 29 Sep

13:59 - 10:40HRL Harlingen Valley Intl-LHR London Heathrow

14h 41m2 stops Houston George Bush Intcntl Washington, D.C. Dulles Intl

09:30 - 21:52LHR London Heathrow-HRL Harlingen Valley Intl

18h 22m2 stops Frankfurt am Main Houston George Bush Intcntl

£665United Airlines

Mon, 21 Sep - Tue, 29 Sep

11:25 - 07:50HRL Harlingen Valley Intl-LHR London Heathrow

14h 25m1 stop Houston George Bush Intcntl

12:05 - 22:48LHR London Heathrow-HRL Harlingen Valley Intl

16h 43m1 stop Houston George Bush Intcntl

£670United Airlines

Sun, 15 Nov - Thu, 19 Nov

11:25 - 07:50HRL Harlingen Valley Intl-LHR London Heathrow

14h 25m1 stop Houston George Bush Intcntl

12:05 - 22:48LHR London Heathrow-HRL Harlingen Valley Intl

16h 43m1 stop Houston George Bush Intcntl

£670United Airlines

Sun, 15 Nov - Thu, 19 Nov

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Iberia flights from Harlingen to United Kingdom

Our best Iberia deals on Harlingen to United Kingdom flight tickets

Iberia

4 Nov

HRL14:47Harlingen Valley Intl

15h 13m

1 stop

LHR12:00London Heathrow

11 Nov

LHR19:40London Heathrow

20h 33m

2 stops

HRL10:13Harlingen Valley Intl

£627

Iberia

4 Nov

HRL14:47Harlingen Valley Intl

15h 13m

1 stop

LHR12:00London Heathrow

11 Nov

LHR08:20London Heathrow

15h 51m

1 stop

HRL18:11Harlingen Valley Intl

£652

Iberia

21 Sept

HRL15:35Harlingen Valley Intl

16h 50m

1 stop

LHR14:25London Heathrow

29 Sept

LHR07:50London Heathrow

32h 08m

2 stops

HRL09:58Harlingen Valley Intl

£658

United Airlines flights from Harlingen to United Kingdom

Our best United Airlines deals on Harlingen to United Kingdom flight tickets

United Airlines

15 Nov

HRL07:10Harlingen Valley Intl

21h 05m

1 stop

LHR10:15London Heathrow

19 Nov

LHR06:35London Heathrow

19h 12m

2 stops

HRL19:47Harlingen Valley Intl

£648

United Airlines

15 Nov

HRL07:10Harlingen Valley Intl

21h 05m

1 stop

LHR10:15London Heathrow

19 Nov

LHR06:35London Heathrow

19h 12m

2 stops

HRL19:47Harlingen Valley Intl

£649

United Airlines

15 Nov

HRL05:05Harlingen Valley Intl

20h 05m

2 stops

LHR07:10London Heathrow

19 Nov

LHR06:35London Heathrow

19h 12m

2 stops

HRL19:47Harlingen Valley Intl

£650

momondo Fare Finder

Use the filters below to find and compare flights from Harlingen to the United Kingdom that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

HarlingenLondon

HRL Harlingen Valley Intl - LHR London Heathrow

HRLLHR

Harlingen Valley Intl

Wed 4/11

14:47-12:00

1 stop15h 13m

London Heathrow

Wed 11/11

19:40-10:13

2 stops20h 33m

£627

HarlingenLondon

HRL Harlingen Valley Intl - LHR London Heathrow

HRLLHR

Harlingen Valley Intl

Sun 15/11

07:10-10:15

1 stop21h 05m

London Heathrow

Thu 19/11

06:35-19:47

2 stops19h 12m

£648

HarlingenLondon

HRL Harlingen Valley Intl - LHR London Heathrow

HRLLHR

Harlingen Valley Intl

Sun 15/11

07:10-10:15

1 stop21h 05m

London Heathrow

Thu 19/11

06:35-19:47

2 stops19h 12m

£649

HarlingenLondon

HRL Harlingen Valley Intl - LHR London Heathrow

HRLLHR

Harlingen Valley Intl

Sun 15/11

05:05-07:10

2 stops20h 05m

London Heathrow

Thu 19/11

06:35-19:47

2 stops19h 12m

£650

Fastest return journey

HarlingenLondon

HRL Harlingen Valley Intl - LHR London Heathrow

HRLLHR

Harlingen Valley Intl

Wed 4/11

14:47-12:00

1 stop15h 13m

London Heathrow

Wed 11/11

08:20-18:11

1 stop15h 51m

£652

HarlingenLondon

HRL Harlingen Valley Intl - LHR London Heathrow

HRLLHR

Harlingen Valley Intl

Sun 15/11

05:05-05:55

2 stops18h 50m

London Heathrow

Thu 19/11

06:35-19:47

2 stops19h 12m

£652

HarlingenLondon

HRL Harlingen Valley Intl - LHR London Heathrow

HRLLHR

Harlingen Valley Intl

Mon 21/9

15:35-14:25

1 stop16h 50m

London Heathrow

Tue 29/9

07:50-09:58

2 stops32h 08m

£658

HarlingenLondon

HRL Harlingen Valley Intl - LHR London Heathrow

HRLLHR

Harlingen Valley Intl

Mon 21/9

13:59-10:40

2 stops14h 41m

London Heathrow

Tue 29/9

09:30-21:52

2 stops18h 22m

£665

HarlingenLondon

HRL Harlingen Valley Intl - LHR London Heathrow

HRLLHR

Harlingen Valley Intl

Sun 15/11

11:25-07:50

1 stop14h 25m

London Heathrow

Thu 19/11

12:05-22:48

1 stop16h 43m

£670

HarlingenLondon

HRL Harlingen Valley Intl - LHR London Heathrow

HRLLHR

Harlingen Valley Intl

Sun 15/11

11:25-07:50

1 stop14h 25m

London Heathrow

Thu 19/11

12:05-22:48

1 stop16h 43m

£670

Flights are sorted by cheapest return flights first.

Sorted by cheapest first

Cheap Harlingen to United Kingdom flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Harlingen to United Kingdom

Fastest flight time	21h 05m
Direct flights	None

The fastest flight from Harlingen to United Kingdom takes 21h 05m

There are no direct flights from Harlingen to United Kingdom. There are no popular flight routes from Harlingen to United Kingdom.

Search flight deals

Frequently asked questions about flying from Harlingen to the United Kingdom

When did momondo last update prices for flights from Harlingen Valley Intl Airport to United Kingdom?
Prices for flights from Harlingen Valley Intl Airport to United Kingdom are updated daily.
How old do you have to be to fly from Harlingen Valley Intl Airport to United Kingdom?
The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Harlingen Valley Intl Airport to United Kingdom.
What documentation or ID do you need to fly to United Kingdom?
The travel and health documents required for your trip to United Kingdom can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at United Kingdom. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

Frequently asked questions about flying from Harlingen to the United Kingdom

How do I get Price Alerts for flights from Harlingen to United Kingdom?
You can take advantage of momondo’s Price Alerts by first searching for your flights to Harlingen from United Kingdom. Flight offers will be shown to you in real-time. From there you can create a Price Alert by using our on-site widget.
How can I save money on flights from Harlingen to United Kingdom with momondo?
With “Price Forecast”, learn how soon you should book your flight in advance. Down to the day of week and time of day, our information can inform you on the ideal time to book to save on your travel. Our “Price Calendar” shows you at a quick glance when to book your travel for lower rates. By setting “Price Alerts” you can monitor changes in price and target the ideal time to book. Search for your trip destination by budget amount via our “Explore” feature. Whether you’re looking for ideas for your next travel adventure or cost-cutting tips, our “Discover” content is a great place to start.
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 Harlingen to United Kingdom?

It is quick and easy to find Harlingen to United Kingdom flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to United Kingdom that suits you.

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

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

How can momondo help me find flights from Harlingen to United Kingdom?

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from Harlingen to United Kingdom.

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

Yes. momondo can track prices for Harlingen to United Kingdom 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.