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Cheap flights from London Heathrow Airport to Harlingen from £830

This is the cheapest return flight price found by a momondo user in the last 72 hours by searching for a flight from London Heathrow Airport to Harlingen departing on 7/3. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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0 bags
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Find the cheapest flights from London Heathrow Airport to Harlingen

Cheap return flights

Enter your travel dates to find the best prices.
United Airlines Logo
09:30 - 21:44LHR-HRL
18h 14m2 stops
United Airlines Logo
11:55 - 10:25HRL-LHR
17h 30m2 stops
£830United Airlines
Find Deal
Sat, 7 Mar - Wed, 11 Mar
United Airlines Logo
08:30 - 21:44LHR-HRL
19h 14m2 stops
United Airlines Logo
17:16 - 10:15HRL-LHR
11h 59m1 stop
£831United Airlines
Find Deal
Sat, 7 Mar - Wed, 11 Mar
United Airlines Logo
08:30 - 21:44LHR-HRL
19h 14m2 stops
United Airlines Logo
11:55 - 10:15HRL-LHR
17h 20m1 stop
£832United Airlines
Find Deal
Sat, 7 Mar - Wed, 11 Mar
American Airlines Logo
10:15 - 18:16LHR-HRL
14h 01m1 stop
American Airlines Logo
10:04 - 06:50HRL-LHR
15h 46m1 stop
£854American Airlines
Find Deal
Sat, 7 Mar - Wed, 11 Mar
American Airlines Logo
16:30 - 08:45LHR-HRL
22h 15m1 stop
American Airlines Logo
16:12 - 10:00HRL-LHR
12h 48m1 stop
£854American Airlines
Find Deal
Sat, 7 Mar - Wed, 11 Mar
American Airlines Logo
15:00 - 22:51LHR-HRL
13h 51m1 stop
American Airlines Logo
12:10 - 06:50HRL-LHR
13h 40m1 stop
£856American Airlines
Find Deal
Sat, 7 Mar - Wed, 11 Mar
United Airlines Logo
12:05 - 19:49LHR-HRL
13h 44m1 stop
United Airlines Logo
17:20 - 07:10HRL-LHR
31h 50m2 stops
£878United Airlines
Find Deal
Tue, 16 Dec - Tue, 23 Dec
United Airlines Logo
12:05 - 19:49LHR-HRL
13h 44m1 stop
United Airlines Logo
12:15 - 07:30HRL-LHR
13h 15m1 stop
£943United Airlines
Find Deal
Tue, 16 Dec - Tue, 23 Dec
United Airlines Logo
07:25 - 21:54LHR-HRL
20h 29m2 stops
United Airlines Logo
07:00 - 11:20HRL-LHR
22h 20m2 stops
£1,482United Airlines
Find Deal
Tue, 16 Dec - Tue, 23 Dec

United Airlines flights from London Heathrow Airport to Harlingen, Texas

Our best United Airlines deals on London Heathrow Airport to Harlingen, Texas flight tickets
United Airlines
7 Mar
LHR09:30London Heathrow
18h 14m
2 stops
HRL21:44Harlingen Valley Intl
11 Mar
HRL11:55Harlingen Valley Intl
17h 30m
2 stops
LHR10:25London Heathrow
£830
Find similar
United Airlines
7 Mar
LHR08:30London Heathrow
19h 14m
2 stops
HRL21:44Harlingen Valley Intl
11 Mar
HRL17:16Harlingen Valley Intl
11h 59m
1 stop
LHR10:15London Heathrow
£831
Find similar
United Airlines
7 Mar
LHR08:30London Heathrow
19h 14m
2 stops
HRL21:44Harlingen Valley Intl
11 Mar
HRL11:55Harlingen Valley Intl
17h 20m
1 stop
LHR10:15London Heathrow
£832
Find similar

American Airlines flights from London Heathrow Airport to Harlingen, Texas

Our best American Airlines deals on London Heathrow Airport to Harlingen, Texas flight tickets
American Airlines
7 Mar
LHR10:15London Heathrow
14h 01m
1 stop
HRL18:16Harlingen Valley Intl
11 Mar
HRL10:04Harlingen Valley Intl
15h 46m
1 stop
LHR06:50London Heathrow
£854
Find similar
American Airlines
7 Mar
LHR16:30London Heathrow
22h 15m
1 stop
HRL08:45Harlingen Valley Intl
11 Mar
HRL16:12Harlingen Valley Intl
12h 48m
1 stop
LHR10:00London Heathrow
£854
Find similar
American Airlines
7 Mar
LHR15:00London Heathrow
13h 51m
1 stop
HRL22:51Harlingen Valley Intl
11 Mar
HRL12:10Harlingen Valley Intl
13h 40m
1 stop
LHR06:50London Heathrow
£856
Find similar

momondo Fare Finder

 
Customise your flight search to find flights from London Heathrow Airport to Harlingen, Texas 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 2 November 2025.
Use the filters below to find and compare flights from London Heathrow Airport to Harlingen, Texas that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

LondonHarlingen

LHR - HRL

LHRHRL

London Heathrow

Sat 7/3

09:30-21:44

2 stops18h 14m

Harlingen Valley Intl

Wed 11/3

11:55-10:25

2 stops17h 30m

£830

LondonHarlingen

LHR - HRL

LHRHRL

London Heathrow

Sat 7/3

08:30-21:44

2 stops19h 14m

Harlingen Valley Intl

Wed 11/3

17:16-10:15

1 stop11h 59m

£831

LondonHarlingen

LHR - HRL

LHRHRL

London Heathrow

Sat 7/3

08:30-21:44

2 stops19h 14m

Harlingen Valley Intl

Wed 11/3

11:55-10:15

1 stop17h 20m

£832

LondonHarlingen

LHR - HRL

LHRHRL

London Heathrow

Sat 7/3

10:15-18:16

1 stop14h 01m

Harlingen Valley Intl

Wed 11/3

10:04-06:50

1 stop15h 46m

£854

LondonHarlingen

LHR - HRL

LHRHRL

London Heathrow

Sat 7/3

16:30-08:45

1 stop22h 15m

Harlingen Valley Intl

Wed 11/3

16:12-10:00

1 stop12h 48m

£854

LondonHarlingen

LHR - HRL

LHRHRL

London Heathrow

Sat 7/3

15:00-22:51

1 stop13h 51m

Harlingen Valley Intl

Wed 11/3

12:10-06:50

1 stop13h 40m

£856

LondonHarlingen

LHR - HRL

LHRHRL

London Heathrow

Tue 16/12

12:05-19:49

1 stop13h 44m

Harlingen Valley Intl

Tue 23/12

17:20-07:10

2 stops31h 50m

£878

LondonHarlingen

LHR - HRL

LHRHRL

London Heathrow

Tue 16/12

12:05-19:49

1 stop13h 44m

Harlingen Valley Intl

Tue 23/12

12:15-07:30

1 stop13h 15m

£943

LondonHarlingen

LHR - HRL

LHRHRL

London Heathrow

Tue 16/12

07:25-21:54

2 stops20h 29m

Harlingen Valley Intl

Tue 23/12

07:00-11:20

2 stops22h 20m

£1,482

LondonHarlingen

LHR - HRL

LHRHRL

London Heathrow

Tue 28/4

16:25-23:59

1 stop13h 34m

£2,282

Flights are sorted by cheapest return flights first.

Sorted by cheapest first

See travel insights to Harlingen from

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

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 day to depart on your flight to Harlingen, Texas?

The cheapest day to depart from London Heathrow Airport to Harlingen, Texas is on a Friday when prices can be found for as low as £893. The most expensive day to fly to Harlingen, Texas is Wednesday, with ticket prices averaging around £954.

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

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

Cheap London Heathrow Airport to Harlingen, Texas (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, Texas

Direct flights

None
There are no direct flights from London Heathrow Airport to Harlingen, Texas. There are no popular flight routes from London Heathrow Airport to Harlingen, Texas.
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  • 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. 13h 44m 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.

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.

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