Cheap flights from London Heathrow Airport to Harlingen, Texas from £737

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 4/12. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — HRL
7 Sep — 14 Sep1
1 adult

Cheap flight deals from Heathrow to Harlingen

Discover tips and strategies to find the most affordable flight options for your journey from Heathrow (LHR) to Harlingen (HRL). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated 2 September 2025.

Round-trip from

£737
Iberia
  • Iberia
  • 4/12-12/12
  • 2 total stops
  • 25h 08m total
  • London to Harlingen

Find flight deals from Heathrow to Harlingen

Cheapest flights from Heathrow to Harlingen
Explore the most affordable flight options available from Heathrow to Harlingen. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 2 September 2025.

Thu 4/1214:55LHR - HRL
1 stop13h 17mIberia
Fri 12/1216:09HRL - LHR
1 stop11h 51mIberia
Deal found 31/8£737
Sun 14/907:25LHR - HRL
2 stops20h 27mMultiple Airlines
Thu 18/907:00HRL - LHR
2 stops20h 35mMultiple Airlines
Deal found 29/8£1,567

Cheapflights Fare Finder

 
Customise your flight search to find flights from Heathrow to Harlingen 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, Cheapflights users made 858,174 searches. Data last updated 2 September 2025.
Use the filters below to find and compare flights from London Heathrow Airport to Harlingen that are best for you.

Fly from

Heathrow

Fly to

Harlingen

Route

Depart

Return

Price

LondonHarlingen

LHR - HRL

LHRHRL

London Heathrow

Thu 4/12

14:55-22:12

1 stop13h 17m

Harlingen Valley Intl

Fri 12/12

16:09-10:00

1 stop11h 51m

£737

LondonHarlingen

LHR - HRL

LHRHRL

London Heathrow

Sun 14/9

07:25-21:52

2 stops20h 27m

Harlingen Valley Intl

Thu 18/9

07:00-09:35

2 stops20h 35m

£1,567

Flights are sorted by cheapest return flights first.

Deals found on 31/8

Best time to book a flight from Heathrow to Harlingen

Have a flexible travel schedule? Discover the best time to fly to Harlingen from Heathrow with our price prediction graph.
Estimated return price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Related info for your journey

Find useful and relevant information for your journey from Heathrow to Harlingen. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
  • What airport do you fly into for flights to Harlingen from London Heathrow?

    Most people fly into Harlingen Valley Intl (HRL) if they book a flight to Harlingen from London Heathrow. On average, Valley Intl has 0 inbound flights from London Heathrow per day from 0 airlines. Harlingen Valley Intl is conveniently located just 3.7 mi from Harlingen’s city center.

  • How long is the flight from London Heathrow Airport to Harlingen, Texas?

    There are many flights that can get you from London Heathrow Airport to Harlingen, Texas in 13h 17m. Fly via Iberia to get the fastest option. Airlines will cover a distance of 5109 mi.

  • Can I find deals for flights from Heathrow to Harlingen that include hotel bookings?

    Yes. In addition to deals on Heathrow to Harlingen flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from Heathrow to Harlingen?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Heathrow to Harlingen.

  • Can I find deals for business class flights from Heathrow to Harlingen?

    Yes. Cheapflights offers flight deals from Heathrow to Harlingen by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from Heathrow to Harlingen?

Cheapflights helps you search for flights from Heathrow to Harlingen via 900+ travel sites so you don’t have to. After performing a flight search, users can also filter their flight selection by filtering for price, number of stops, airlines, and so on.

Why should you use Cheapflights to find cheap flight tickets from Heathrow to Harlingen?

It’s simple! Cheapflights, which is free to use for everyone, saves millions of users time and money every year by helping them find the cheapest and most suitable flights from Heathrow to Harlingen.

Can Cheapflights find flights from Heathrow to Harlingen with no change fees?

Cheapflights does show flights with no change fees to all users. To see these options for flights from Heathrow to Harlingen, users can toggle the no change fees filter when performing a flight search.

Can Cheapflights notify me if prices for flights from Heathrow to Harlingen become cheaper?

Yes, Cheapflights has a feature called Price Alert, which notifies users when flight prices change. Track prices for your flight to Harlingen from Heathrow today and book when prices fit your budget.

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.