£243 Cheap Flights from Harlingen (HRL) to London (LHR)

View £243 flight on Wed, 29 Jul 2026Opens in a new window

Popular airlines from Valley Intl. Airport (HRL) to Heathrow Airport (LHR)

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Cheap Flights from Harlingen (HRL) to London (LHR)

Prices were available within the past 7 days and start at £243 for one-way flights and £780 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Air Canada
Wed, 13 May - Wed, 20 May
HRL
Harlingen
LHR
London
£780 Return, found 4 days ago
£780
Return
found 4 days ago
Select Air Canada flight, departing Wed, 13 May from Harlingen to London, returning Wed, 20 May, priced at £780 found 4 days ago
Air Canada
Wed, 13 May - Wed, 20 May
HRL
Harlingen
LHR
London
£784 Return, found 4 days ago
£784
Return
found 4 days ago
Select Air Canada flight, departing Wed, 13 May from Harlingen to London, returning Wed, 20 May, priced at £784 found 4 days ago
Iberia
Sat, 9 May - Fri, 29 May
HRL
Harlingen
LHR
London
£784 Return, found 5 days ago
£784
Return
found 5 days ago
Select Iberia flight, departing Sat, 9 May from Harlingen to London, returning Fri, 29 May, priced at £784 found 5 days ago
Iberia
Wed, 13 May - Wed, 20 May
HRL
Harlingen
LHR
London
£792 Return, found 4 days ago
£792
Return
found 4 days ago
Select Iberia flight, departing Wed, 13 May from Harlingen to London, returning Wed, 20 May, priced at £792 found 4 days ago
Iberia
Sat, 9 May - Fri, 29 May
HRL
Harlingen
LHR
London
£809 Return, found 5 days ago
£809
Return
found 5 days ago
Select Iberia flight, departing Sat, 9 May from Harlingen to London, returning Fri, 29 May, priced at £809 found 5 days ago
Air Canada
Sat, 9 May - Fri, 29 May
HRL
Harlingen
LHR
London
£814 Return, found 5 days ago
£814
Return
found 5 days ago
Select Air Canada flight, departing Sat, 9 May from Harlingen to London, returning Fri, 29 May, priced at £814 found 5 days ago
Iberia
Wed, 13 May - Wed, 20 May
HRL
Harlingen
LHR
London
£816 Return, found 4 days ago
£816
Return
found 4 days ago
Select Iberia flight, departing Wed, 13 May from Harlingen to London, returning Wed, 20 May, priced at £816 found 4 days ago
Air Canada
Sat, 9 May - Fri, 29 May
HRL
Harlingen
LHR
London
£817 Return, found 5 days ago
£817
Return
found 5 days ago
Select Air Canada flight, departing Sat, 9 May from Harlingen to London, returning Fri, 29 May, priced at £817 found 5 days ago
Iberia
Sat, 9 May - Fri, 29 May
HRL
Harlingen
LHR
London
£821 Return, found 5 days ago
£821
Return
found 5 days ago
Select Iberia flight, departing Sat, 9 May from Harlingen to London, returning Fri, 29 May, priced at £821 found 5 days ago
Air Canada
Wed, 13 May - Wed, 20 May
HRL
Harlingen
LHR
London
£825 Return, found 4 days ago
£825
Return
found 4 days ago
Select Air Canada flight, departing Wed, 13 May from Harlingen to London, returning Wed, 20 May, priced at £825 found 4 days ago

Frequently asked questions

How do I find cheap flights from Harlingen, TX (HRL-Valley Intl.) to London (LHR-Heathrow)?
To find a cheap flight from Harlingen, TX (HRL-Valley Intl.) to London (LHR-Heathrow), be flexible with your dates. Traveling outside of peak vacation months and booking a mid-week flight can help you save. Early morning and late night flights are often more affordable, too. Expedia allows you to compare flight times, airlines and routes all in one place to find low fares. You can also set up Price Tracking and receive alerts when fares go up or down.
What is the best time to fly from Harlingen, TX (HRL-Valley Intl.) to London (LHR-Heathrow)?
The best time to fly is usually mid-week (Tuesday or Wednesday) and during early morning hours as flights tend to be cheaper, less crowded, and generally more on-time. Avoid major holidays and peak vacation seasons for smoother travel. Combining off-peak days and hours often gives the best combination of cost, comfort, and convenience.
How many flights per day from Harlingen, TX (HRL-Valley Intl.) to London (LHR-Heathrow)?
There are approximately 8 connecting flights per day from Harlingen, TX (HRL-Valley Intl.) to London (LHR-Heathrow). Some common connection points include George Bush Intercontinental (IAH), Dallas-Fort Worth Intl. (DFW), and Minneapolis - St. Paul Intl. (MSP).
What is the earliest flight from Harlingen, TX (HRL-Valley Intl.) to London (LHR-Heathrow)?
The earliest flight from Harlingen, TX (HRL-Valley Intl.) to London (LHR-Heathrow) typically departs at approximately 5:00 AM local time. This service is operated by United Airlines and Air Canada. This is a seasonal service active only in September. An early departure like this can help maximise your time at your destination. To compare early flights on Expedia, select the "Early Morning" and "Morning" filters in your search.
What day of the week has the most flights from Harlingen, TX (HRL-Valley Intl.) to London (LHR-Heathrow)?
You'll typically find the most flights from Harlingen, TX (HRL-Valley Intl.) to London (LHR-Heathrow) on a Monday, with around 13 flights available. This gives you a good selection of options for your journey. Major airlines on this route include American Airlines, United Airlines, and Envoy Air.
What are the most popular departure times for flights from Harlingen, TX (HRL-Valley Intl.) to London (LHR-Heathrow)?
The most popular departure times for flights from Harlingen, TX (HRL-Valley Intl.) to London (LHR-Heathrow) are in the afternoon, from 3pm to 6pm. About 43% of passengers prefer this time. Many major carriers, including British Airways, American Airlines and Iberia, offer flights during this window. This timing works well because it allows you to have a productive morning before heading to the airport, and you'll arrive in London ready to start your evening or get a good night's rest.
How long does it take to fly from Harlingen, TX (HRL-Valley Intl.) to London (LHR-Heathrow)?
Flying from HRL to LHR with a connection usually takes about 12 hours 20 minutes, traveling roughly 5,114 miles. Keep in mind that actual flight times can vary due to wind patterns, weather, and air traffic.
Can you fly business or first class from Harlingen, TX (HRL-Valley Intl.) to London (LHR-Heathrow)?
Select the "Business class" and "First class" filters when looking for HRL to LHR flights on Expedia. This is the easiest way to compare prices, routes and flight times for your trip.
How do I earn miles on a Harlingen, TX (HRL-Valley Intl.) to London (LHR-Heathrow) flight with Expedia?
It's easy to earn miles on a Harlingen, TX (HRL-Valley Intl.) to London (LHR-Heathrow) flight when you book with Expedia. Before you confirm your booking, simply select your frequent flyer program and enter your program number. As a member of One Key™, you can also earn OneKeyCash™* on top of your airline miles when you book with Expedia. *Excludes taxes and fees. OneKeyCash is not redeemable for cash and can only be used on Expedia and other participating brands.
What airports do you fly into for London from Valley Intl. (HRL)?
From Valley Intl. (HRL), you can fly directly into Heathrow (LHR) to reach London. Some flights may connect through major hubs like Dallas-Fort Worth Intl. (DFW), George Bush Intercontinental (IAH) before reaching London. Compare routes and airports on Expedia to find the best flight options for your travel plans.
Is it cheaper to buy a plane ticket from Harlingen, TX (HRL-Valley Intl.) to London (LHR-Heathrow) at the last minute?
Typically, booking a last minute flight from Harlingen, TX (HRL-Valley Intl.) to London (LHR-Heathrow) will be more expensive than booking in advance. As the departure date approaches, there are usually fewer seats available which can drive up the cost. However, if there's some wiggle room with your travel dates and times, you could bag a cheap last-minute fare.
Is it cheaper to book a Harlingen, TX (HRL-Valley Intl.) to London (LHR-Heathrow) flight and hotel package?
Securing a Harlingen, TX (HRL-Valley Intl.) to London (LHR-Heathrow) flight and hotel package is usually cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your travels all in one place. Select from our extensive range of stays and then add flights, activities and car rentals to your booking. Bundle everything together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Harlingen, TX (HRL-Valley Intl.) to London (LHR-Heathrow)?
If you booked your Harlingen, TX (HRL-Valley Intl.) to London (LHR-Heathrow) flight within the last 24 hours, you may be able to modify or cancel it without any fees. Depending on the airline and the type of ticket you have, additional charges may apply for changes beyond this timeframe. Airline policies and contact information can be found in your itinerary or confirmation email. Or, head to our Customer Service portal if you'd like more information.

Travel information

Origin airport
Valley Intl.
Destination airport
Heathrow
Return price
£780
Distance
8181 km

Book with confidence

Compare flights from Harlingen to London easily and book with confidence

For travelling on business or for pleasure, Expedia makes it easy to book your flights from Harlingen to London. Operating between them flights per day, 20 airlines cover the route. And fly direct, getting you to Heathrow in just hours. If you have a preferred carrier, use our advanced search tool to find the right flight from Valley Intl. to Heathrow.  

To make things even better, in the advanced search, you can also choose to fly economy, premium economy, business or first class, select your maximum number of stops, and pick your preferred departure and arrival time. You can also opt for refundable and direct flights. 

Grab a great deal on your flight from Valley Intl. (HRL) to Heathrow (LHR)

The easiest way to view the best deals on flights from Harlingen to London today is to enter your travel dates and hit search. From here, you can sort your results by price to see the cheapest flights first. Right now, return flights from Valley Intl. to Heathrow start at just £780 and range up to £825.  

To find an even better deal, try  

  • being flexible on your dates – midweek flights can be cheaper
  • looking for other airports near Harlingen and London
  • booking your flight during May, the cheapest month on this route
  • varying your flight times – early morning and late at night are sometimes cheaper 

Why you should book your Harlingen to London flight with Expedia!

We cater for all flight types, cabin classes and airlines. So whether you’re booking flights from Valley Intl. to Heathrow for a budget break or a business trip with a bit of pleasure thrown in, we make it easy to secure the seat that’s right for you.  

Thanks to our supersized inventory that offers great choice all in one place, you know you’ll get a great deal with Expedia. Especially if you bundle your flight together with your hotel, you will unlock amazing savings. For added peace of mind, you can choose flexible bookings or filter to find refundable options, so you won’t pay a fee to change your flight.  

Compare flights from Harlingen to London easily and book with confidence

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*Available to Expedia members.