How do I get Price Alerts for flights from Harlingen, Texas to London?

Confirm your travel details to search for the latest offers for flights from Harlingen, Texas to London . While browsing offers there will be the option to toggle “Price Alerts”. You’ll then receive updates when prices for the flight route increase or decrease.

How can I save money on flights from Harlingen, Texas to London with momondo?

Plan your trips smart with the “Price Forecast” feature, which uses flight data to help you pick the best days to fly for the lowest fares. Our “Price Calendar” helps you get the most for your money by showing you when it’s most advantageous to fly. Curate your own travel experiences for less with “Explore” . Expert travel hacks to fuel your next adventure are a click away with “Discover” by momondo. Set up our “Price Alerts” to track fare changes and book when prices are at their lowest point.

How does momondo find its flight prices?

We compare prices from 700+ competitors to help you find the price that works best for you. momondo operates in over 30 international markets, bringing you access to a wide range of fares and deals. Search for your travel using momondo for a diverse range of options from airlines and OTAs.

When did momondo last update prices for flights from Harlingen Valley Intl Airport to London?

Prices for flights from Harlingen Valley Intl Airport to London were last updated today.

How old do you have to be to fly from Harlingen Valley Intl Airport to London?

The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Harlingen Valley Intl Airport to London.

What documentation or ID do you need to fly to London?

The necessary travel and health documents for your London trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

£499 Cheap Flights from Harlingen to London in 2025/26

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Find the cheapest flights from Harlingen, Texas to London

Round-trip

One-way

Cheap return flights

Enter your travel dates to find the best prices.

17:00 - 10:15HRL-LHR

11h 15m1 stop

09:30 - 21:54LHR-HRL

18h 24m2 stops

£499United Airlines

Find Deal

Tue, 18 Nov - Tue, 25 Nov

12:10 - 10:50HRL-LHR

16h 40m2 stops

07:30 - 21:54LHR-HRL

20h 24m2 stops

£510United Airlines

Find Deal

Tue, 18 Nov - Tue, 25 Nov

12:10 - 07:30HRL-LHR

13h 20m1 stop

10:00 - 19:39LHR-HRL

15h 39m1 stop

£513United Airlines

Find Deal

Tue, 18 Nov - Tue, 25 Nov

15:39 - 20:10HRL-LHR

22h 31m2 stops

15:50 - 14:43LHR-HRL

28h 53m2 stops

£524Delta

Find Deal

Fri, 14 Nov - Thu, 20 Nov

15:39 - 20:10HRL-LHR

22h 31m2 stops

11:05 - 14:43LHR-HRL

33h 38m1 stop

£528Delta

Find Deal

Fri, 14 Nov - Thu, 20 Nov

15:22 - 10:00HRL-LHR

12h 38m1 stop

10:35 - 18:13LHR-HRL

13h 38m1 stop

£731Iberia

Find Deal

Fri, 6 Feb - Wed, 11 Feb

17:20 - 06:30HRL-LHR

55h 10m2 stops

18:00 - 21:59LHR-HRL

57h 59m2 stops

£902Air Canada

Find Deal

Mon, 22 Dec - Tue, 30 Dec

05:34 - 06:50HRL-LHR

19h 16m1 stop

08:20 - 22:48LHR-HRL

20h 28m1 stop

£1,077American Airlines

Find Deal

Mon, 22 Dec - Tue, 30 Dec

05:34 - 06:50HRL-LHR

19h 16m1 stop

12:10 - 22:48LHR-HRL

16h 38m2 stops

£1,364American Airlines

Find Deal

Mon, 22 Dec - Tue, 30 Dec

14:48 - 08:35HRL-LHR

11h 47m1 stop

15:00 - 22:48LHR-HRL

13h 48m1 stop

£2,947Iberia

Find Deal

Fri, 19 Dec - Sun, 4 Jan

United Airlines flights from Harlingen, Texas to London

Our best United Airlines deals on Harlingen, Texas to London flight tickets

United Airlines

18 Nov

HRL17:00Harlingen Valley Intl

11h 15m

1 stop

LHR10:15London Heathrow

25 Nov

LHR09:30London Heathrow

18h 24m

2 stops

HRL21:54Harlingen Valley Intl

£499

Find similar

United Airlines

18 Nov

HRL12:10Harlingen Valley Intl

16h 40m

2 stops

LHR10:50London Heathrow

25 Nov

LHR07:30London Heathrow

20h 24m

2 stops

HRL21:54Harlingen Valley Intl

£510

Find similar

United Airlines

18 Nov

HRL12:10Harlingen Valley Intl

13h 20m

1 stop

LHR07:30London Heathrow

25 Nov

LHR10:00London Heathrow

15h 39m

1 stop

HRL19:39Harlingen Valley Intl

£513

Find similar

Delta flights from Harlingen, Texas to London

Our best Delta deals on Harlingen, Texas to London flight tickets

Delta

14 Nov

HRL15:39Harlingen Valley Intl

22h 31m

2 stops

LHR20:10London Heathrow

20 Nov

LHR15:50London Heathrow

28h 53m

2 stops

HRL14:43Harlingen Valley Intl

£524

Find similar

Delta

14 Nov

HRL15:39Harlingen Valley Intl

22h 31m

2 stops

LHR20:10London Heathrow

20 Nov

LHR11:05London Heathrow

33h 38m

1 stop

HRL14:43Harlingen Valley Intl

£528

Find similar

Delta

22 Dec

HRL15:15Harlingen Valley Intl

22h 55m

2 stops

LHR20:10London Heathrow

30 Dec

LHR15:50London Heathrow

28h 30m

2 stops

HRL14:20Harlingen Valley Intl

£6,007

Find similar

Fly from

Fly to

Route

Depart

Return

Price

HarlingenLondon

HRL - LHR

HRLLHR

Harlingen Valley Intl

Tue 18/11

17:00-10:15

1 stop11h 15m

London Heathrow

Tue 25/11

09:30-21:54

2 stops18h 24m

£499

HarlingenLondon

HRL - LHR

HRLLHR

Harlingen Valley Intl

Tue 18/11

12:10-10:50

2 stops16h 40m

London Heathrow

Tue 25/11

07:30-21:54

2 stops20h 24m

£510

HarlingenLondon

HRL - LHR

HRLLHR

Harlingen Valley Intl

Tue 18/11

12:10-07:30

1 stop13h 20m

London Heathrow

Tue 25/11

10:00-19:39

1 stop15h 39m

£513

HarlingenLondon

HRL - LHR

HRLLHR

Harlingen Valley Intl

Fri 14/11

15:39-20:10

2 stops22h 31m

London Heathrow

Thu 20/11

15:50-14:43

2 stops28h 53m

£524

HarlingenLondon

HRL - LHR

HRLLHR

Harlingen Valley Intl

Fri 14/11

15:39-20:10

2 stops22h 31m

London Heathrow

Thu 20/11

11:05-14:43

1 stop33h 38m

£528

HarlingenLondon

HRL - LHR

HRLLHR

Harlingen Valley Intl

Fri 6/2

15:22-10:00

1 stop12h 38m

London Heathrow

Wed 11/2

10:35-18:13

1 stop13h 38m

£731

HarlingenLondon

HRL - LHR

HRLLHR

Harlingen Valley Intl

Mon 22/12

17:20-06:30

2 stops55h 10m

London Heathrow

Tue 30/12

18:00-21:59

2 stops57h 59m

£902

HarlingenLondon

HRL - LHR

HRLLHR

Harlingen Valley Intl

Mon 22/12

05:34-06:50

1 stop19h 16m

London Heathrow

Tue 30/12

08:20-22:48

1 stop20h 28m

£1,077

HarlingenLondon

HRL - LHR

HRLLHR

Harlingen Valley Intl

Mon 22/12

05:34-06:50

1 stop19h 16m

London Heathrow

Tue 30/12

12:10-22:48

2 stops16h 38m

£1,364

HarlingenLondon

HRL - LHR

HRLLHR

Harlingen Valley Intl

Fri 19/12

14:48-08:35

1 stop11h 47m

London Heathrow

Sun 4/1

15:00-22:48

1 stop13h 48m

£2,947

Flights are sorted by cheapest return flights first.

Sorted by cheapest first

When to book flights from Harlingen, Texas to London

Are you open to changing your travel dates? Check out the ideal times to fly from Harlingen, Texas to London according to our flight data. Find out which month and days have the cheapest flights.

Estimated return price

Cheap Harlingen, Texas to London (HRL to LON) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Harlingen, Texas to London

Direct flights	None

There are no direct flights from Harlingen, Texas to London. There are no popular flight routes from Harlingen, Texas to London.

Search flight deals

How far is Harlingen Valley Intl to London by plane?
There are 5125.1 mi between Harlingen Valley Intl and London. By plane, this route typically takes 11h 15m.
When did momondo last update prices for flights from Harlingen Valley Intl Airport to London?
Prices for flights from Harlingen Valley Intl Airport to London were last updated today.
How old do you have to be to fly from Harlingen Valley Intl Airport to London?
The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Harlingen Valley Intl Airport to London.
What documentation or ID do you need to fly to London?
The necessary travel and health documents for your London trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

How do I get Price Alerts for flights from Harlingen, Texas to London?
Confirm your travel details to search for the latest offers for flights from Harlingen, Texas to London. While browsing offers there will be the option to toggle “Price Alerts”. You’ll then receive updates when prices for the flight route increase or decrease.
How can I save money on flights from Harlingen, Texas to London with momondo?
Plan your trips smart with the “Price Forecast” feature, which uses flight data to help you pick the best days to fly for the lowest fares. Our “Price Calendar” helps you get the most for your money by showing you when it’s most advantageous to fly. Curate your own travel experiences for less with “Explore”. Expert travel hacks to fuel your next adventure are a click away with “Discover” by momondo. Set up our “Price Alerts” to track fare changes and book when prices are at their lowest point.
How does momondo find its flight prices?
We compare prices from 700+ competitors to help you find the price that works best for you. momondo operates in over 30 international markets, bringing you access to a wide range of fares and deals. Search for your travel using momondo for a diverse range of options from airlines and OTAs.

Eastbourne

Milton Keynes

Luton

Maidstone

Gatwick

Slough

Canterbury

Southend-on-Sea

Ipswich

Ilford

Guildford

Colchester

Dover

Hayes

Chelmsford

Worthing

Dartford

Bedford

Ramsgate

Stansted

Why use momondo?

Why should I use momondo to find a flight deal from Harlingen to London?

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from Harlingen to London . Millions of users trust and use momondo every year so you are in good hands.

Can I find flights from Harlingen to London with flexible booking policies on momondo?

Yes. momondo enables you to select and highlight flights to London from Harlingen with this policy.

How can momondo help me find flights from Harlingen to London?

momondo provides multiple filters to help you find the best flight to London from Harlingen. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

I’m not ready to book a flight from Harlingen to London right now. Can momondo alert me if prices change?

If you are not ready to book a flight from Harlingen to London now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to London and let you know when they change.