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

There are many flights that can get you from Harlingen, Texas to London in 20h 33m. Fly via United Airlines, Iberia, or American Airlines to get the fastest option. The distance between Harlingen, Texas and London is about 5109 mi. This flight may include one or multiple stops.

In terms of precipitation, rainfall in London ranges from 40.0 - 70.0 inches per month. January is typically the wettest month, when rainfall can reach 70.0 mm. July is typically the driest time to visit London when rainfall is around 40.0 mm.

If weather is an important factor for your trip to London, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 17.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 4.0 C).

What is the cheapest time of day to fly from HRL to LON?

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Harlingen, Texas to London as you normally would.

What airport do you fly from for flights from Harlingen to London?

If you book a flight to London from Harlingen, you will be flying from Valley Intl, which is the city’s only airport. Harlingen Valley Intl (HRL) is located 3.7 mi from the center of Harlingen. There are 0 flights from Valley Intl to London per day from 0 different airlines.

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

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

How can I find direct flights from Harlingen to London?

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

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

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

£406+ Flights from Harlingen, Texas to London

Cheap flight deals from Harlingen to London

Round-trip from	£442
One-way from	£406

United Airlines
14/4-17/4
4 total stops
56h 47m total
Harlingen to London

Search Deals

Iberia
1/3
1 total stop
11h 50m total
Harlingen to London

Search Deals

Find flight deals from Harlingen to London

Enter your travel dates to find the best prices.

Cheapest flights from Harlingen to London
Explore the most affordable flight options available from Harlingen to London. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 16 January 2026.

Tue 14/417:18

HRL

LHR

2 stops38h 02m

United Airlines

Fri 17/406:55

LHR

HRL

2 stops18h 45m

United Airlines

Deal found 14/1£442

Wed 18/306:00

HRL

LHR

1 stop21h 15m

Iberia

Tue 24/308:20

LHR

HRL

1 stop14h 56m

Iberia

Deal found 14/1£454

Mon 16/310:42

HRL

LHR

1 stop20h 33m

American Airlines

Wed 1/416:25

LHR

HRL

1 stop23h 47m

American Airlines

Deal found 14/1£466

Mon 16/316:04

HRL

LHR

2 stops23h 06m

Delta

Wed 1/420:05

LHR

HRL

2 stops25h 04m

Delta

Deal found 14/1£469

Sat 28/209:20

HRL

LHR

1 stop18h 55m

United Airlines

Sat 7/306:35

LHR

HRL

2 stops21h 21m

United Airlines

Deal found 14/1£470

Tue 10/306:00

HRL

LHR

1 stop19h 50m

Iberia

Mon 16/308:20

LHR

HRL

1 stop19h 33m

Iberia

Deal found 15/1£473

Sat 14/316:04

HRL

LHR

1 stop34h 01m

Delta

Wed 1/420:05

LHR

HRL

2 stops25h 04m

Delta

Deal found 14/1£474

Wed 18/317:25

HRL

LHR

1 stop33h 05m

United Airlines

Tue 24/309:30

LHR

HRL

2 stops39h 26m

United Airlines

Deal found 15/1£478

Tue 10/317:25

HRL

LHR

1 stop11h 50m

United Airlines

Mon 16/313:00

LHR

HRL

2 stops32h 04m

United Airlines

Deal found 15/1£480

Fri 1/510:47

HRL

LHR

1 stop15h 18m

Iberia

Thu 7/506:10

LHR

HRL

2 stops22h 41m

Iberia

Deal found 15/1£480

Tue 10/309:20

HRL

LHR

2 stops16h 10m

Air Canada

Mon 16/313:00

LHR

HRL

2 stops32h 04m

Air Canada

Deal found 14/1£485

Best flights from Harlingen to London
Discover carefully curated flight deals from Harlingen to London that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 16 January 2026.

Tue 14/417:18

HRL

LHR

2 stops38h 02m

United Airlines

Fri 17/406:55

LHR

HRL

2 stops18h 45m

United Airlines

Deal found 14/1£442

Wed 18/306:00

HRL

LHR

1 stop21h 15m

Iberia

Tue 24/308:20

LHR

HRL

1 stop14h 56m

Iberia

Deal found 14/1£454

Mon 16/310:42

HRL

LHR

1 stop20h 33m

American Airlines

Wed 1/416:25

LHR

HRL

1 stop23h 47m

American Airlines

Deal found 14/1£466

Tue 17/316:04

HRL

LHR

2 stops23h 06m

Delta

Wed 1/420:05

LHR

HRL

2 stops25h 04m

Delta

Deal found 14/1£469

Sat 28/209:20

HRL

LHR

1 stop18h 55m

United Airlines

Sat 7/306:35

LHR

HRL

2 stops21h 21m

United Airlines

Deal found 14/1£470

Tue 10/306:00

HRL

LHR

1 stop19h 50m

Iberia

Mon 16/308:20

LHR

HRL

1 stop19h 33m

Iberia

Deal found 15/1£473

Sat 14/316:04

HRL

LHR

1 stop34h 01m

Delta

Wed 1/420:05

LHR

HRL

2 stops25h 04m

Delta

Deal found 14/1£474

Last-minute flights from Harlingen to London
Discover last-minute flight deals from Harlingen to London. Data last updated 16 January 2026 and is based on user searches.

Thu 22/109:20

HRL

LHR

1 stop18h 55m

United Airlines

Mon 26/113:30

LHR

HRL

2 stops38h 29m

United Airlines

Deal found 13/1£530

Thu 22/109:20

HRL

LHR

2 stops15h 50m

Air Canada

Mon 26/113:00

LHR

HRL

2 stops37h 01m

Air Canada

Deal found 13/1£556

One-way flights from Harlingen to London
Search for one-way flight options from Harlingen to London. Find affordable one-way fares based on user searches. Data last updated 16 January 2026.

Sun 1/314:45

HRL

LHR

1 stop11h 50m

Iberia

Deal found 14/1£406

Fri 13/317:25

HRL

LHR

1 stop33h 05m

United Airlines

Deal found 14/1£489

Fri 12/620:05

HRL

LHR

1 stop12h 20m

Iberia

Deal found 15/1£711

Mon 18/519:53

HRL

LHR

1 stop12h 32m

Iberia

Deal found 15/1£2,114

Mon 18/507:00

HRL

LHR

2 stops20h 35m

Multiple Airlines

Deal found 15/1£2,357

Mon 18/509:20

HRL

LHR

3 stops18h 40m

Air Canada

Deal found 15/1£2,634

Fly from

Fly to

Route

Depart

Return

Price

HarlingenLondon

HRL - LHR

HRLLHR

Harlingen Valley Intl

Tue 14/4

17:18-13:20

2 stops38h 02m

London Heathrow

Fri 17/4

06:55-19:40

2 stops18h 45m

£442

HarlingenLondon

HRL - LHR

HRLLHR

Harlingen Valley Intl

Wed 18/3

06:00-08:15

1 stop21h 15m

London Heathrow

Tue 24/3

08:20-18:16

1 stop14h 56m

£454

HarlingenLondon

HRL - LHR

HRLLHR

Harlingen Valley Intl

Mon 16/3

10:42-12:15

1 stop20h 33m

London Heathrow

Wed 1/4

16:25-10:12

1 stop23h 47m

£466

HarlingenLondon

HRL - LHR

HRLLHR

Harlingen Valley Intl

Tue 17/3

16:04-20:10

2 stops23h 06m

London Heathrow

Wed 1/4

20:05-15:09

2 stops25h 04m

£469

HarlingenLondon

HRL - LHR

HRLLHR

Harlingen Valley Intl

Sat 28/2

09:20-10:15

1 stop18h 55m

London Heathrow

Sat 7/3

06:35-21:56

2 stops21h 21m

£470

HarlingenLondon

HRL - LHR

HRLLHR

Harlingen Valley Intl

Tue 10/3

06:00-06:50

1 stop19h 50m

London Heathrow

Mon 16/3

08:20-22:53

1 stop19h 33m

£473

HarlingenLondon

HRL - LHR

HRLLHR

Harlingen Valley Intl

Sat 14/3

16:04-07:05

1 stop34h 01m

London Heathrow

Wed 1/4

20:05-15:09

2 stops25h 04m

£474

HarlingenLondon

HRL - LHR

HRLLHR

Harlingen Valley Intl

Sun 1/3

14:45-08:35

1 stop11h 50m

£406

HarlingenLondon

HRL - LHR

HRLLHR

Harlingen Valley Intl

Fri 13/3

17:25-07:30

1 stop33h 05m

£489

HarlingenLondon

HRL - LHR

HRLLHR

Harlingen Valley Intl

Fri 12/6

20:05-14:25

1 stop12h 20m

£711

Flights are sorted by cheapest return flights first.

Deals found on 14/1

Showing 1-10 of 13 results

Best time to book a flight from Harlingen to London

Have a flexible travel schedule? Discover the best time to fly to London 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

No data available for this route at this time. Please check back soon.

Related info for your journey

What airport do you fly from for flights from Harlingen to London?
If you book a flight to London from Harlingen, you will be flying from Valley Intl, which is the city’s only airport. Harlingen Valley Intl (HRL) is located 3.7 mi from the center of Harlingen. There are 0 flights from Valley Intl to London per day from 0 different airlines.
How long is the flight from Harlingen, Texas to London?
There are many flights that can get you from Harlingen, Texas to London in 20h 33m. Fly via United Airlines, Iberia, or American Airlines to get the fastest option. The distance between Harlingen, Texas and London is about 5109 mi. This flight may include one or multiple stops.
Can I find deals for flights from Harlingen to London that include hotel bookings?
Yes. In addition to deals on Harlingen to London flights, Cheapflights offers holiday packages that include both flights and hotel.
How can I find direct flights from Harlingen to London?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Harlingen to London.
Can I find deals for business class flights from Harlingen to London?
Yes. Cheapflights offers flight deals from Harlingen to London 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

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

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

Certainly. Search results for flights to London from Harlingen shown to you on Cheapflights can be narrowed down with different useful search filters, which includes flexible booking options.

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

Of course! You can now track prices for flights from Harlingen to London and get an alert from Cheapflights when they change. Have a valid email address ready and click the bell icon next to the flight deals above to set up your price alerts.

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Cheap flights from Harlingen, Texas to London from £406

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 1/3. Fares are subject to change and may not be available on all flights or dates of travel.

Cheap flight deals from Harlingen to London

Round-trip from

One-way from

Find flight deals from Harlingen to London

Cheapest flights from Harlingen to LondonExplore the most affordable flight options available from Harlingen to London. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 16 January 2026.

Explore the most affordable flight options available from Harlingen to London. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 16 January 2026.

Cheapflights Fare Finder

Use the filters below to find and compare flights from Harlingen to London that are best for you.

Best time to book a flight from Harlingen to London

Have a flexible travel schedule? Discover the best time to fly to London from Harlingen with our price prediction graph.

Cheapflights Insights

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

Related info for your journey

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

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

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

How can I find direct flights from Harlingen to London?

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

Travelling to a place near London?

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Harlingen to London

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

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

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

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

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Cheapest flights from Harlingen to London
Explore the most affordable flight options available from Harlingen to London. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 16 January 2026.