How do I get Price Alerts for flights from London to Harlingen, Texas?

Confirm your travel details to search for the latest offers for flights from London to Harlingen, Texas . 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 London to Harlingen, Texas 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 compare prices from 700+ competitors to help you find the price that works best for you. momondo operates in over 30 international markets, bringing you access to a wide range of fares and deals. Search for your travel using momondo for a diverse range of options from airlines and OTAs.

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.

£1,016 Cheap Flights from London to Harlingen in 2026

1 adult

0 bags

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Find the cheapest flights from London to Harlingen

Round-trip

One-way

Cheap return flights

Enter your travel dates to find the best prices.

08:30 - 11:23

LHR

HRL

32h 53m

2 stops

07:00 - 06:30

HRL

LHR

17h 30m

2 stops

£1,016Air Canada

Wed, 1 Apr - Wed, 8 Apr

07:30 - 21:59

LHR

HRL

20h 29m

2 stops

17:18 - 11:35

HRL

LHR

12h 17m

1 stop

£1,160United Airlines

Wed, 1 Apr - Wed, 8 Apr

10:00 - 19:40

LHR

HRL

15h 40m

1 stop

12:05 - 11:35

HRL

LHR

17h 30m

1 stop

£1,183United Airlines

Wed, 1 Apr - Wed, 8 Apr

United Airlines flights from London to Harlingen, Texas

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

United Airlines

1 Apr

LHR07:30London Heathrow

20h 29m

2 stops

HRL21:59Harlingen Valley Intl

8 Apr

HRL17:18Harlingen Valley Intl

12h 17m

1 stop

LHR11:35London Heathrow

£1,160

United Airlines

1 Apr

LHR10:00London Heathrow

15h 40m

1 stop

HRL19:40Harlingen Valley Intl

8 Apr

HRL12:05Harlingen Valley Intl

17h 30m

1 stop

LHR11:35London Heathrow

£1,183

Fly from

Fly to

Route

Depart

Return

Price

LondonHarlingen

LHR - HRL

LHRHRL

London Heathrow

Wed 1/4

08:30-11:23

2 stops32h 53m

Harlingen Valley Intl

Wed 8/4

07:00-06:30

2 stops17h 30m

£1,016

LondonHarlingen

LHR - HRL

LHRHRL

London Heathrow

Wed 1/4

07:30-21:59

2 stops20h 29m

Harlingen Valley Intl

Wed 8/4

17:18-11:35

1 stop12h 17m

£1,160

LondonHarlingen

LHR - HRL

LHRHRL

London Heathrow

Wed 1/4

10:00-19:40

1 stop15h 40m

Harlingen Valley Intl

Wed 8/4

12:05-11:35

1 stop17h 30m

£1,183

Flights are sorted by cheapest return flights first.

Sorted by cheapest first

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	17h 31m
Direct flights	None

The fastest flight from London to Harlingen, Texas takes 17h 31m

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 17h 31m 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.

How do I get Price Alerts for flights from London to Harlingen, Texas?
Confirm your travel details to search for the latest offers for flights from London to Harlingen, Texas. 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 London to Harlingen, Texas 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 compare prices from 700+ competitors to help you find the price that works best for you. momondo operates in over 30 international markets, bringing you access to a wide range of fares and deals. Search for your travel using momondo for a diverse range of options from airlines and OTAs.

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.