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

Prices for flights from London to Harlingen Valley Intl Airport are refreshed on a daily basis.

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

What documentation or ID do you need to fly to Harlingen Valley Intl Airport?

The travel and health documents required for your trip to Harlingen Valley Intl Airport 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 Harlingen Valley Intl Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

£771 Cheap Flights from London to Harlingen in 2025/26

1 adult

0 bags

Voted winner of Europe's Best Travel App 2023

Save money when you book flights with momondo

Big names, great deals

Search 100s of travel sites to compare prices.

Filter for what you want

Free Wi-Fi? Stopover? Instantly customise your results.

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Not ready to book? to track prices.

Search flight deals

Find the cheapest flights from London to Harlingen

Round-trip

One-way

Cheap return flights

Enter your travel dates to find the best prices.

13:00 - 11:26

LHR

HRL

28h 26m2 stops

12:10 - 07:10

HRL

LHR

37h 00m2 stops

£818Air Canada

Wed, 7 Jan - Wed, 14 Jan

10:25 - 21:59

LHR

HRL

17h 34m2 stops

12:10 - 07:30

HRL

LHR

13h 20m1 stop

£819United Airlines

Wed, 7 Jan - Wed, 14 Jan

07:30 - 21:59

LHR

HRL

20h 29m2 stops

07:00 - 07:55

HRL

LHR

18h 55m2 stops

£826United Airlines

Thu, 22 Jan - Mon, 26 Jan

08:30 - 21:59

LHR

HRL

19h 29m2 stops

07:00 - 05:55

HRL

LHR

16h 55m2 stops

£830United Airlines

Thu, 22 Jan - Mon, 26 Jan

12:05 - 20:01

LHR

HRL

13h 56m1 stop

09:20 - 07:30

HRL

LHR

16h 10m1 stop

£848United Airlines

Thu, 22 Jan - Mon, 26 Jan

10:00 - 20:01

LHR

HRL

16h 01m1 stop

09:20 - 07:30

HRL

LHR

16h 10m1 stop

£849United Airlines

Thu, 22 Jan - Mon, 26 Jan

12:05 - 20:01

LHR

HRL

13h 56m1 stop

09:20 - 07:30

HRL

LHR

16h 10m1 stop

£853United Airlines

Thu, 22 Jan - Mon, 26 Jan

16:30 - 10:36

LHR

HRL

24h 06m1 stop

18:44 - 06:50

HRL

LHR

30h 06m1 stop

£1,231Iberia

Wed, 7 Jan - Wed, 14 Jan

12:05 - 21:59

LHR

HRL

15h 54m1 stop

17:20 - 07:30

HRL

LHR

32h 10m1 stop

£1,454United Airlines

Wed, 24 Dec - Sun, 4 Jan

10:00 - 21:59

LHR

HRL

17h 59m1 stop

07:00 - 05:55

HRL

LHR

16h 55m2 stops

£1,654United Airlines

Wed, 24 Dec - Sun, 4 Jan

United Airlines flights from London to Harlingen, Texas

Our best United Airlines deals on London to Harlingen, Texas flight tickets

United Airlines

7 Jan

LHR10:25London Heathrow

17h 34m

2 stops

HRL21:59Harlingen Valley Intl

14 Jan

HRL12:10Harlingen Valley Intl

13h 20m

1 stop

LHR07:30London Heathrow

£819

Find similar

United Airlines

22 Jan

LHR08:30London Heathrow

19h 29m

2 stops

HRL21:59Harlingen Valley Intl

26 Jan

HRL07:00Harlingen Valley Intl

21h 15m

1 stop

LHR10:15London Heathrow

£826

Find similar

United Airlines

22 Jan

LHR08:30London Heathrow

19h 29m

2 stops

HRL21:59Harlingen Valley Intl

26 Jan

HRL07:00Harlingen Valley Intl

16h 55m

2 stops

LHR05:55London Heathrow

£830

Find similar

Fly from

Fly to

Route

Depart

Return

Price

LondonHarlingen

LHR - HRL

LHRHRL

London Heathrow

Wed 7/1

13:00-11:26

2 stops28h 26m

Harlingen Valley Intl

Wed 14/1

12:10-07:10

2 stops37h 00m

£818

LondonHarlingen

LHR - HRL

LHRHRL

London Heathrow

Wed 7/1

10:25-21:59

2 stops17h 34m

Harlingen Valley Intl

Wed 14/1

12:10-07:30

1 stop13h 20m

£819

LondonHarlingen

LHR - HRL

LHRHRL

London Heathrow

Thu 22/1

07:30-21:59

2 stops20h 29m

Harlingen Valley Intl

Mon 26/1

07:00-07:55

2 stops18h 55m

£826

LondonHarlingen

LHR - HRL

LHRHRL

London Heathrow

Thu 22/1

08:30-21:59

2 stops19h 29m

Harlingen Valley Intl

Mon 26/1

07:00-05:55

2 stops16h 55m

£830

LondonHarlingen

LHR - HRL

LHRHRL

London Heathrow

Thu 22/1

12:05-20:01

1 stop13h 56m

Harlingen Valley Intl

Mon 26/1

09:20-07:30

1 stop16h 10m

£848

LondonHarlingen

LHR - HRL

LHRHRL

London Heathrow

Thu 22/1

10:00-20:01

1 stop16h 01m

Harlingen Valley Intl

Mon 26/1

09:20-07:30

1 stop16h 10m

£849

LondonHarlingen

LHR - HRL

LHRHRL

London Heathrow

Thu 22/1

12:05-20:01

1 stop13h 56m

Harlingen Valley Intl

Mon 26/1

09:20-07:30

1 stop16h 10m

£853

LondonHarlingen

LHR - HRL

LHRHRL

London Heathrow

Wed 7/1

16:30-10:36

1 stop24h 06m

Harlingen Valley Intl

Wed 14/1

18:44-06:50

1 stop30h 06m

£1,231

LondonHarlingen

LHR - HRL

LHRHRL

London Heathrow

Wed 24/12

12:05-21:59

1 stop15h 54m

Harlingen Valley Intl

Sun 4/1

17:20-07:30

1 stop32h 10m

£1,454

LondonHarlingen

LHR - HRL

LHRHRL

London Heathrow

Wed 24/12

10:00-21:59

1 stop17h 59m

Harlingen Valley Intl

Sun 4/1

07:00-05:55

2 stops16h 55m

£1,654

Flights are sorted by cheapest return flights first.

Sorted by cheapest first

How to get the cheapest flight ticket from London 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 to Harlingen, Texas is on a Friday when prices can be found for as low as £877. The most expensive day to fly to Harlingen, Texas is Wednesday, with ticket prices averaging around £937.

When to book flights from London to Harlingen, Texas

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

Estimated return price

Cheap London to Harlingen, Texas (LON to HRL) flight deals and tips

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

Fastest flight time	15h 54m
Direct flights	None

The fastest flight from London to Harlingen, Texas takes 15h 54m

There are no direct flights from London to Harlingen, Texas. There are no popular flight routes from London to Harlingen, Texas.

Search flight deals

How far is London to Harlingen Valley Intl by plane?
Harlingen Valley Intl is 5125.1 mi away from London. Typically, this will take 15h 54m by plane in normal conditions.
When did momondo last update prices for flights from London to Harlingen Valley Intl Airport?
Prices for flights from London to Harlingen Valley Intl Airport are refreshed on a daily basis.
How old do you have to be to fly from London 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 to Harlingen Valley Intl Airport.
What documentation or ID do you need to fly to Harlingen Valley Intl Airport?
The travel and health documents required for your trip to Harlingen Valley Intl Airport 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 Harlingen Valley Intl Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.
What is the most popular airline from London to Harlingen, Texas?
momondo data reveals that the most frequently booked airline on the route from London to Harlingen, Texas is United Airlines, representing 100% of all bookings.

Why use momondo?

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

It is quick and easy to find London to Harlingen 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 Harlingen that suits you.

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

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

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 offers price alerts on flights to Harlingen from London. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.