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Cheap flights from Harlingen to London Heathrow Airport from £506

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 24/8. Fares are subject to change and may not be available on all flights or dates of travel.
HRL — LHR
16 7月 — 23 7月1
1 adult

Cheap flight deals from Harlingen to Heathrow

Discover tips and strategies to find the most affordable flight options for your journey from Harlingen (HRL) to Heathrow (LHR). 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 11 7月 2025.

Round-trip from

£506

Popular in

June

Cheapest in

March

Average price

£814
United Airlines
  • United Airlines
  • 24/8-31/8
  • 3 total stops
  • 38h 48m total
  • Harlingen to London
Search Deals
Highest demand for flights based on searches. 17% potential increase in price (£108 potential increase over avg. return price).
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Cheapest flight prices on average. 5% potential price decrease (£26 potential savings vs. average return price).
Search Deals
Average for round-trip flights in July 2025
Search Deals

Find flight deals from Harlingen to Heathrow

Cheapest flights from Harlingen to Heathrow
Explore the most affordable flight options available from Harlingen to Heathrow. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 11 7月 2025.

週日 24/805:00HRL - LHR
1 stop20h 40mUnited Airlines
週日 31/807:25LHR - HRL
2 stops18h 08mUnited Airlines
Deal found 10/7£506
週日 24/810:02HRL - LHR
1 stop14h 23mAmerican Airlines
週日 31/815:10LHR - HRL
1 stop14h 45mAmerican Airlines
Deal found 10/7£517
週四 11/917:20HRL - LHR
2 stops31h 10mAir Canada
週一 29/909:30LHR - HRL
2 stops19h 48mAir Canada
Deal found 11/7£619

Cheapflights Fare Finder

Customise your flight search to find flights from Harlingen to Heathrow 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 11 7月 2025.
Use the filters below to find and compare flights from Harlingen to London Heathrow Airport that are best for you.

Fly from

Harlingen

Fly to

Heathrow

Route

Depart

Return

Price

HarlingenLondon

HRL - LHR

HRLLHR

Harlingen Valley Intl

週日 24/8

05:00-07:40

1 stop20h 40m

London Heathrow

週日 31/8

07:25-19:33

2 stops18h 08m

£506

HarlingenLondon

HRL - LHR

HRLLHR

Harlingen Valley Intl

週日 24/8

10:02-06:25

1 stop14h 23m

London Heathrow

週日 31/8

15:10-23:55

1 stop14h 45m

£517

HarlingenLondon

HRL - LHR

HRLLHR

Harlingen Valley Intl

週四 11/9

17:20-06:30

2 stops31h 10m

London Heathrow

週一 29/9

09:30-23:18

2 stops19h 48m

£619

Flights are sorted by cheapest return flights first.

Deals found on 10/7

Best time to book a flight from Harlingen to Heathrow

Have a flexible travel schedule? Discover the best time to fly to Heathrow from Harlingen 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.

Cheapflights Insights

Everything you need to know about your flight from Harlingen to London Heathrow Airport

What is the cheapest month to book a flight from Harlingen, Texas to London Heathrow Airport?

Currently, January is the cheapest month in which you can book a flight from Harlingen, Texas to London Heathrow Airport (average of £112). Flying from Harlingen, Texas to London Heathrow Airport in August is currently the most expensive (average of £164). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

Reviews of airlines servicing Heathrow

Get insights into the airlines that provide service to Heathrow. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Heathrow. Reviews last updated 11 7月 2025.
See what other customers who have flown with United Airlines, American Airlines, andAir Canada from Harlingen to London Heathrow Airport have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
8,848 reviews
Check prices

Comfort

7.3

Food

6.6

Crew

8.1

Boarding

7.7

Overall

7.4

Entertainment

7.0

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??
United Airlines
7.4
Good
8,848 reviews
United Airlines
7.4
Good
8,848 reviews
Check prices

Comfort

7.3

Food

6.6

Crew

8.1

Boarding

7.7

Overall

7.4

Entertainment

7.0

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??
American Airlines
7.2
Good
10,000 reviews
United Airlines
7.4
Good
8,848 reviews
Check prices

Comfort

7.3

Food

6.6

Crew

8.1

Boarding

7.7

Overall

7.4

Entertainment

7.0

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??
Air Canada
7.1
Good
9,695 reviews
United Airlines
7.4
Good
8,848 reviews
Check prices

Comfort

7.3

Food

6.6

Crew

8.1

Boarding

7.7

Overall

7.4

Entertainment

7.0

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??

Related info for your journey

Find useful and relevant information for your journey from Harlingen to Heathrow. 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 from for flights from Harlingen to London Heathrow?

    Located just 3.7 mi from the city center, Harlingen Valley Intl is the airport most travelers will use when flying to London Heathrow from Harlingen. Booking flights from Valley Intl (HRL) to London Heathrow should be relatively easy as there are 0 daily outbound flights to London Heathrow from 0 different airlines.

  • What are the cheapest airlines flying from Harlingen, Texas to London Heathrow Airport round-trip?

    Flying on United Airlines is currently your cheapest option to London Heathrow Airport, with prices starting at £506. Additional return tickets that might be worth considering are offered by American Airlines and Air Canada, with the lowest prices starting at £517 and £619, respectively.

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

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

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

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

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

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

  • What is the cheapest month to book a flight from Harlingen, Texas to London Heathrow Airport?

    Currently, January is the cheapest month in which you can book a flight from Harlingen, Texas to London Heathrow Airport (average of £112). Flying from Harlingen, Texas to London Heathrow Airport in August is currently the most expensive (average of £164). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Travelling to a place near Harlingen?

Book flights to Harlingen if you plan to visit one of these locations
Hounslow
Croydon
Milton Keynes
Deal
Northampton
Gatwick
Slough
Luton
Wembley
Crawley
Eastbourne
Ilford
Hayes
Ipswich
Folkestone
Southend-on-Sea
Watford
Winchester
Swindon
Maidstone

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Fly with Cheapflights

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

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

Yes, Cheapflights offers price alerts on Harlingen to Heathrow flights so you can book your travel at the perfect time. Price Alerts can be enabled by clicking the bell icon next to the flight deals above and providing your email address where you want to receive the alerts.

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