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Cheap flights from Harlingen, Texas to London from £405

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Harlingen, Texas to London departing on 13/3. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags
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Find the cheapest flights from Harlingen, Texas to London

Cheap return flights

Enter your travel dates to find the best prices.
United Airlines Logo
12:10 - 10:15
HRL
-
LHR
17h 05m
1 stop
United Airlines Logo
11:10 - 16:04
LHR
-
HRL
33h 54m
2 stops
£474United Airlines
Tue, 10 Mar - Mon, 16 Mar
Iberia Logo
18:46 - 14:25
HRL
-
LHR
13h 39m
1 stop
Iberia Logo
11:30 - 10:17
LHR
-
HRL
28h 47m
2 stops
£477Iberia
Tue, 31 Mar - Wed, 29 Apr
Air Canada Logo
09:20 - 06:30
HRL
-
LHR
16h 10m
2 stops
Air Canada Logo
18:00 - 21:56
LHR
-
HRL
32h 56m
2 stops
£480Air Canada
Tue, 10 Mar - Mon, 16 Mar
United Airlines Logo
12:10 - 07:30
HRL
-
LHR
14h 20m
1 stop
United Airlines Logo
10:00 - 21:56
LHR
-
HRL
16h 56m
1 stop
£485United Airlines
Wed, 18 Mar - Tue, 24 Mar
United Airlines Logo
12:10 - 07:55
HRL
-
LHR
14h 45m
2 stops
United Airlines Logo
08:00 - 21:56
LHR
-
HRL
18h 56m
2 stops
£488United Airlines
Wed, 18 Mar - Tue, 24 Mar
United Airlines Logo
12:10 - 07:30
HRL
-
LHR
14h 20m
1 stop
United Airlines Logo
07:25 - 19:40
LHR
-
HRL
18h 15m
2 stops
£489United Airlines
Tue, 24 Mar - Tue, 31 Mar
United Airlines Logo
09:20 - 07:10
HRL
-
LHR
16h 50m
2 stops
United Airlines Logo
07:25 - 19:40
LHR
-
HRL
18h 15m
2 stops
£491United Airlines
Tue, 24 Mar - Tue, 31 Mar
Air Canada Logo
12:05 - 06:30
HRL
-
LHR
36h 25m
2 stops
Air Canada Logo
08:30 - 21:59
LHR
-
HRL
43h 29m
2 stops
£492Air Canada
Tue, 31 Mar - Wed, 29 Apr
Iberia Logo
10:42 - 06:20
HRL
-
LHR
13h 38m
1 stop
Iberia Logo
08:55 - 19:33
LHR
-
HRL
16h 38m
1 stop
£497Iberia
Tue, 31 Mar - Wed, 29 Apr
United Airlines Logo
09:20 - 07:30
HRL
-
LHR
17h 10m
1 stop
United Airlines Logo
10:00 - 21:59
LHR
-
HRL
17h 59m
1 stop
£510United Airlines
Tue, 24 Mar - Tue, 31 Mar

Iberia flights from Harlingen, Texas to London Heathrow Airport

Our best Iberia deals on Harlingen, Texas to London Heathrow Airport flight tickets
Iberia
31 Mar
HRL18:46Harlingen Valley Intl
13h 39m
1 stop
LHR14:25London Heathrow
29 Apr
LHR11:30London Heathrow
28h 47m
2 stops
HRL10:17Harlingen Valley Intl
£477
Iberia
31 Mar
HRL10:42Harlingen Valley Intl
13h 38m
1 stop
LHR06:20London Heathrow
29 Apr
LHR08:55London Heathrow
16h 38m
1 stop
HRL19:33Harlingen Valley Intl
£497
Iberia
1 May
HRL06:00Harlingen Valley Intl
20h 05m
1 stop
LHR08:05London Heathrow
7 May
LHR06:10London Heathrow
22h 41m
2 stops
HRL22:51Harlingen Valley Intl
£511

Air Canada flights from Harlingen, Texas to London Heathrow Airport

Our best Air Canada deals on Harlingen, Texas to London Heathrow Airport flight tickets
Air Canada
10 Mar
HRL09:20Harlingen Valley Intl
16h 10m
2 stops
LHR06:30London Heathrow
16 Mar
LHR18:00London Heathrow
32h 56m
2 stops
HRL21:56Harlingen Valley Intl
£480
Air Canada
31 Mar
HRL12:05Harlingen Valley Intl
36h 25m
2 stops
LHR06:30London Heathrow
29 Apr
LHR08:30London Heathrow
43h 29m
2 stops
HRL21:59Harlingen Valley Intl
£492

momondo Fare Finder

 
Customise your flight search to find flights from Harlingen, Texas to London Heathrow Airport 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, momondo users made 279,928 searches. Data last updated 1 February 2026.
Use the filters below to find and compare flights from Harlingen, Texas to London Heathrow Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

HarlingenLondon

HRL - LHR

HRLLHR

Harlingen Valley Intl

Tue 10/3

12:10-10:15

1 stop17h 05m

London Heathrow

Mon 16/3

11:10-16:04

2 stops33h 54m

£474

HarlingenLondon

HRL - LHR

HRLLHR

Harlingen Valley Intl

Tue 31/3

18:46-14:25

1 stop13h 39m

London Heathrow

Wed 29/4

11:30-10:17

2 stops28h 47m

£477

HarlingenLondon

HRL - LHR

HRLLHR

Harlingen Valley Intl

Tue 10/3

09:20-06:30

2 stops16h 10m

London Heathrow

Mon 16/3

18:00-21:56

2 stops32h 56m

£480

HarlingenLondon

HRL - LHR

HRLLHR

Harlingen Valley Intl

Wed 18/3

12:10-07:30

1 stop14h 20m

London Heathrow

Tue 24/3

10:00-21:56

1 stop16h 56m

£485

HarlingenLondon

HRL - LHR

HRLLHR

Harlingen Valley Intl

Wed 18/3

12:10-07:55

2 stops14h 45m

London Heathrow

Tue 24/3

08:00-21:56

2 stops18h 56m

£488

HarlingenLondon

HRL - LHR

HRLLHR

Harlingen Valley Intl

Tue 24/3

12:10-07:30

1 stop14h 20m

London Heathrow

Tue 31/3

07:25-19:40

2 stops18h 15m

£489

HarlingenLondon

HRL - LHR

HRLLHR

Harlingen Valley Intl

Tue 24/3

09:20-07:10

2 stops16h 50m

London Heathrow

Tue 31/3

07:25-19:40

2 stops18h 15m

£491

HarlingenLondon

HRL - LHR

HRLLHR

Harlingen Valley Intl

Tue 31/3

12:05-06:30

2 stops36h 25m

London Heathrow

Wed 29/4

08:30-21:59

2 stops43h 29m

£492

HarlingenLondon

HRL - LHR

HRLLHR

Harlingen Valley Intl

Tue 31/3

10:42-06:20

1 stop13h 38m

London Heathrow

Wed 29/4

08:55-19:33

1 stop16h 38m

£497

HarlingenLondon

HRL - LHR

HRLLHR

Harlingen Valley Intl

Tue 24/3

09:20-07:30

1 stop17h 10m

London Heathrow

Tue 31/3

10:00-21:59

1 stop17h 59m

£510

Flights are sorted by cheapest return flights first.

Showing 1-10 of 19 resultsSorted by cheapest first
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See travel insights to London from

How to get the cheapest flight ticket from Harlingen, Texas to London Heathrow Airport

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest airline that flies from Harlingen Valley Intl to London Heathrow?

United Airlines and Iberia are the most popular carriers operating from Harlingen Valley Intl to London Heathrow

When to book flights from Harlingen, Texas to London Heathrow Airport

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

Cheap Harlingen, Texas to London Heathrow Airport (HRL to LHR) flight deals and tips

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

Fastest flight time

11h 59m

Direct flights

None
The fastest flight from Harlingen, Texas to London Heathrow Airport takes 11h 59m
There are no direct flights from Harlingen, Texas to London Heathrow Airport. There are no popular flight routes from Harlingen, Texas to London Heathrow Airport.
Search flight deals

  • How far is Harlingen Valley Intl to London Heathrow by plane?

    There are 5112.7 mi between Harlingen Valley Intl and London Heathrow. In terms of flight time, this usually takes a little over 11h 59m.

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

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

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

    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 Heathrow Airport.

  • What documentation or ID do you need to fly to London Heathrow Airport?

    The necessary travel and health documents for your London Heathrow Airport 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.

Travelling to a place near London?

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Stratford-upon-Avon
Swindon
Southend-on-Sea
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Ipswich
Ilford
Poole
Guildford
Chelmsford
Hayes
Dover
Swanage
Folkestone

Why use momondo?

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

Finding the right flight to London from Harlingen is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to London quick and easy, saving you time and money.

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

All flight searches from Harlingen to London on momondo can be filtered to show those which offer flexible booking policies.

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

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from Harlingen to London.

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

Of course. momondo tracks the price of Harlingen to London flights. All you need is a valid email address and we will do the rest; it is that quick and easy.

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