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.
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 |
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Find flight deals from Heathrow to Harlingen
Cheapest flights from Heathrow to HarlingenExplore 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.
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.
Cheapflights Fare Finder
Use the filters below to find and compare flights from London Heathrow Airport to Harlingen that are best for you.
Fly from
Fly to
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
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
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.
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.
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Alternative routes for Heathrow to Harlingen
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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.