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Cheap flights from Harlingen, Texas to London from £411

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Harlingen, Texas to London departing on 21/9. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags
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Find the cheapest flights from Harlingen, Texas to London (HRL-LHR)

Cheap return flights

United Airlines Logo
17:00 - 07:30HRL-LHR
33h 30m1 stop
United Airlines Logo
11:10 - 15:59LHR-HRL
34h 49m2 stops
£550United Airlines
Find Deal
Sat, 1 Nov - Wed, 12 Nov
United Airlines Logo
17:00 - 06:30HRL-LHR
32h 30m2 stops
United Airlines Logo
11:10 - 15:59LHR-HRL
34h 49m2 stops
£555United Airlines
Find Deal
Sat, 1 Nov - Wed, 12 Nov
Iberia Logo
18:37 - 06:50HRL-LHR
31h 13m1 stop
Iberia Logo
11:55 - 23:14LHR-HRL
17h 19m1 stop
£562Iberia
Find Deal
Sat, 1 Nov - Wed, 12 Nov
United Airlines Logo
17:20 - 11:35HRL-LHR
12h 15m1 stop
United Airlines Logo
13:30 - 23:18LHR-HRL
39h 48m2 stops
£594United Airlines
Find Deal
Thu, 11 Sep - Mon, 29 Sep
United Airlines Logo
11:55 - 11:35HRL-LHR
17h 40m1 stop
United Airlines Logo
10:00 - 23:18LHR-HRL
19h 18m1 stop
£626United Airlines
Find Deal
Thu, 11 Sep - Mon, 29 Sep
United Airlines Logo
17:20 - 11:35HRL-LHR
12h 15m1 stop
United Airlines Logo
13:40 - 23:18LHR-HRL
15h 38m1 stop
£626United Airlines
Find Deal
Thu, 11 Sep - Mon, 29 Sep
United Airlines Logo
12:16 - 07:30HRL-LHR
13h 14m1 stop
United Airlines Logo
12:05 - 21:59LHR-HRL
15h 54m1 stop
£771United Airlines
Find Deal
Wed, 17 Dec - Mon, 22 Dec

United Airlines flights from Harlingen, Texas to London Heathrow Airport

Our best United Airlines deals on Harlingen, Texas to London Heathrow Airport flight tickets
United Airlines
1 Nov
HRL17:00Harlingen Valley Intl
33h 30m
1 stop
LHR07:30London Heathrow
12 Nov
LHR11:10London Heathrow
34h 49m
2 stops
HRL15:59Harlingen Valley Intl
£550
Find similar
United Airlines
1 Nov
HRL17:00Harlingen Valley Intl
32h 30m
2 stops
LHR06:30London Heathrow
12 Nov
LHR11:10London Heathrow
34h 49m
2 stops
HRL15:59Harlingen Valley Intl
£555
Find similar
United Airlines
11 Sept
HRL17:20Harlingen Valley Intl
12h 15m
1 stop
LHR11:35London Heathrow
29 Sept
LHR13:30London Heathrow
39h 48m
2 stops
HRL23:18Harlingen Valley Intl
£594
Find similar

momondo Fare Finder

 
Customise your flight search to find flights from Harlingen, Texas to London Heathrow Airport that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 279,928 searches. Data last updated 22 August 2025.
Use the filters below to find and compare flights from Harlingen, Texas to London Heathrow Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

HarlingenLondon

HRL - LHR

HRLLHR

Harlingen Valley Intl

Sat 1/11

17:00-07:30

1 stop33h 30m

London Heathrow

Wed 12/11

11:10-15:59

2 stops34h 49m

£550

HarlingenLondon

HRL - LHR

HRLLHR

Harlingen Valley Intl

Sat 1/11

17:00-06:30

2 stops32h 30m

London Heathrow

Wed 12/11

11:10-15:59

2 stops34h 49m

£555

HarlingenLondon

HRL - LHR

HRLLHR

Harlingen Valley Intl

Sat 1/11

18:37-06:50

1 stop31h 13m

London Heathrow

Wed 12/11

11:55-23:14

1 stop17h 19m

£562

HarlingenLondon

HRL - LHR

HRLLHR

Harlingen Valley Intl

Thu 11/9

17:20-11:35

1 stop12h 15m

London Heathrow

Mon 29/9

13:30-23:18

2 stops39h 48m

£594

HarlingenLondon

HRL - LHR

HRLLHR

Harlingen Valley Intl

Thu 11/9

11:55-11:35

1 stop17h 40m

London Heathrow

Mon 29/9

10:00-23:18

1 stop19h 18m

£626

HarlingenLondon

HRL - LHR

HRLLHR

Harlingen Valley Intl

Thu 11/9

17:20-11:35

1 stop12h 15m

London Heathrow

Mon 29/9

13:40-23:18

1 stop15h 38m

£626

HarlingenLondon

HRL - LHR

HRLLHR

Harlingen Valley Intl

Wed 17/12

12:16-07:30

1 stop13h 14m

London Heathrow

Mon 22/12

12:05-21:59

1 stop15h 54m

£771

HarlingenLondon

HRL - LHR

HRLLHR

Harlingen Valley Intl

Sun 21/9

14:38-09:00

1 stop12h 22m

£411

HarlingenLondon

HRL - LHR

HRLLHR

Harlingen Valley Intl

Sun 21/9

18:19-17:15

2 stops16h 56m

£1,057

Flights are sorted by cheapest return flights first.

Sorted by cheapest first

See travel insights to London from

How to get the cheapest flight ticket from Harlingen, Texas to London Heathrow Airport

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest airline that flies from Harlingen Valley Intl to London Heathrow?

Iberia is the most popular carrier operating from Harlingen Valley Intl to London Heathrow

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

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

Cheap Harlingen, Texas 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, Texas to London Heathrow Airport

Direct flights

None
There are no direct flights from Harlingen, Texas to London Heathrow Airport. There are no popular flight routes from Harlingen, Texas to London Heathrow Airport.
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  • 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 12h 15m.

  • 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.

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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.

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