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

Confirm your travel details to search for the latest offers for flights from Harlingen to London Heathrow Airport . While browsing offers there will be the option to toggle “Price Alerts”. You’ll then receive updates when prices for the flight route increase or decrease.

How can I save money on flights from Harlingen to London Heathrow Airport with momondo?

Plan your trips smart with the “Price Forecast” feature, which uses flight data to help you pick the best days to fly for the lowest fares. Our “Price Calendar” helps you get the most for your money by showing you when it’s most advantageous to fly. Curate your own travel experiences for less with “Explore” . Expert travel hacks to fuel your next adventure are a click away with “Discover” by momondo. Set up our “Price Alerts” to track fare changes and book when prices are at their lowest point.

How does momondo find its flight prices?

momondo shows deals across 700+ competitors all at once. momondo is active in 30 international markets, so you can have access to a wide range of options from airlines and OTAs alike.

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

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

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

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 London Heathrow Airport.

What documentation or ID do you need to fly to London Heathrow Airport?

The necessary travel and health documents for your London Heathrow Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

£626 Cheap Flights from Harlingen to London Heathrow Airport in 2026

Find the cheapest flights from Harlingen to London

Return

One-way

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

£626Iberia

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

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

£651Iberia

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

07:10 - 11:20HRL Harlingen Valley Intl-LHR London Heathrow

22h 10m2 stops Houston George Bush Intcntl Toronto Pearson Intl

15:00 - 16:01LHR London Heathrow-HRL Harlingen Valley Intl

31h 01m2 stops Toronto Pearson Intl Houston George Bush Intcntl

£664Air Canada

Wed, 4 Nov - Wed, 11 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

£669United Airlines

Sun, 15 Nov - Thu, 19 Nov

18:43 - 14:25HRL Harlingen Valley Intl-LHR London Heathrow

13h 42m1 stop Dallas/Fort Worth

16:30 - 22:54LHR London Heathrow-HRL Harlingen Valley Intl

36h 24m2 stops Madrid Barajas Dallas/Fort Worth

£767Iberia

Tue, 1 Sep - Mon, 7 Sep

18:43 - 12:50HRL Harlingen Valley Intl-LHR London Heathrow

12h 07m1 stop Dallas/Fort Worth

16:25 - 10:04LHR London Heathrow-HRL Harlingen Valley Intl

23h 39m1 stop Dallas/Fort Worth

£822American Airlines

Tue, 1 Sep - Mon, 7 Sep

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

13h 13m1 stop Dallas/Fort Worth

10:05 - 18:11LHR London Heathrow-HRL Harlingen Valley Intl

14h 06m1 stop Dallas/Fort Worth

£856Iberia

Sun, 15 Nov - Wed, 18 Nov

18:41 - 10:00HRL Harlingen Valley Intl-LHR London Heathrow

33h 19m1 stop Dallas/Fort Worth

10:05 - 23:01LHR London Heathrow-HRL Harlingen Valley Intl

18h 56m1 stop Dallas/Fort Worth

£860Iberia

Sun, 15 Nov - Thu, 19 Nov

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Iberia flights from Harlingen to London Heathrow Airport

Our best Iberia deals on Harlingen to London Heathrow Airport 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

£626

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

£651

Iberia

1 Sept

HRL18:43Harlingen Valley Intl

13h 42m

1 stop

LHR14:25London Heathrow

7 Sept

LHR16:30London Heathrow

36h 24m

2 stops

HRL22:54Harlingen Valley Intl

£767

United Airlines flights from Harlingen to London Heathrow Airport

Our best United Airlines deals on Harlingen to London Heathrow Airport 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

HRL05:05Harlingen Valley Intl

18h 50m

2 stops

LHR05:55London Heathrow

19 Nov

LHR06:35London Heathrow

19h 12m

2 stops

HRL19:47Harlingen Valley Intl

£652

United Airlines

15 Nov

HRL11:25Harlingen Valley Intl

14h 25m

1 stop

LHR07:50London Heathrow

19 Nov

LHR12:05London Heathrow

16h 43m

1 stop

HRL22:48Harlingen Valley Intl

£669

momondo 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

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

£626

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

Wed 4/11

14:47-12:00

1 stop15h 13m

London Heathrow

Wed 11/11

08:20-18:11

1 stop15h 51m

£651

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

Wed 4/11

07:10-11:20

2 stops22h 10m

London Heathrow

Wed 11/11

15:00-16:01

2 stops31h 01m

£664

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

£669

HarlingenLondon

HRL Harlingen Valley Intl - LHR London Heathrow

HRLLHR

Harlingen Valley Intl

Tue 1/9

18:43-14:25

1 stop13h 42m

London Heathrow

Mon 7/9

16:30-22:54

2 stops36h 24m

£767

HarlingenLondon

HRL Harlingen Valley Intl - LHR London Heathrow

HRLLHR

Harlingen Valley Intl

Tue 1/9

18:43-12:50

1 stop12h 07m

London Heathrow

Mon 7/9

16:25-10:04

1 stop23h 39m

£822

Fastest return journey

HarlingenLondon

HRL Harlingen Valley Intl - LHR London Heathrow

HRLLHR

Harlingen Valley Intl

Sun 15/11

14:47-10:00

1 stop13h 13m

London Heathrow

Wed 18/11

10:05-18:11

1 stop14h 06m

£856

HarlingenLondon

HRL Harlingen Valley Intl - LHR London Heathrow

HRLLHR

Harlingen Valley Intl

Sun 15/11

18:41-10:00

1 stop33h 19m

London Heathrow

Thu 19/11

10:05-23:01

1 stop18h 56m

£860

Flights are sorted by cheapest return flights first.

Sorted by cheapest first

When to book flights from Harlingen to London Heathrow Airport

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

Estimated return price

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

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

Fastest flight time	21h 05m
Direct flights	None

The fastest flight from Harlingen to London Heathrow Airport takes 21h 05m

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

Search flight deals

Frequently asked questions about flying from Harlingen to London Heathrow Airport

How far is Harlingen Valley Intl to London Heathrow by plane?
There are 5112.7 mi between Harlingen Valley Intl and London Heathrow. In terms of flight time, this usually takes a little over 21h 05m.
When did momondo last update prices for flights from Harlingen Valley Intl Airport to London Heathrow Airport?
Prices for flights from Harlingen Valley Intl Airport to London Heathrow Airport were last updated today.
How old do you have to be to fly from Harlingen Valley Intl Airport to London Heathrow Airport?
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 London Heathrow Airport.
What documentation or ID do you need to fly to London Heathrow Airport?
The necessary travel and health documents for your London Heathrow Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

Frequently asked questions about flying from Harlingen to London Heathrow Airport

How do I get Price Alerts for flights from Harlingen to London Heathrow Airport?
Confirm your travel details to search for the latest offers for flights from Harlingen to London Heathrow Airport. While browsing offers there will be the option to toggle “Price Alerts”. You’ll then receive updates when prices for the flight route increase or decrease.
How can I save money on flights from Harlingen to London Heathrow Airport with momondo?
Plan your trips smart with the “Price Forecast” feature, which uses flight data to help you pick the best days to fly for the lowest fares. Our “Price Calendar” helps you get the most for your money by showing you when it’s most advantageous to fly. Curate your own travel experiences for less with “Explore”. Expert travel hacks to fuel your next adventure are a click away with “Discover” by momondo. Set up our “Price Alerts” to track fare changes and book when prices are at their lowest point.
How does momondo find its flight prices?
momondo shows deals across 700+ competitors all at once. momondo is active in 30 international markets, so you can have access to a wide range of options from airlines and OTAs alike.

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Why use momondo?

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

Finding the right flight to London from Harlingen is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to London quick and easy, saving you time and money.

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

All flight searches from Harlingen to London on momondo can be filtered to show those which offer flexible booking policies.

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

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 London.

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

Of course. momondo tracks the price of Harlingen to London flights. All you need is a valid email address and we will do the rest; it is that quick and easy.