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Cheap flights from Harlingen, Texas to London from $672

This is the cheapest round-trip flight price found by a momondo user in the last 72 hours by searching for a flight from Harlingen, Texas to London departing on 11/18. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Cheap round-trip flights

Enter your travel dates to find the best prices.
United Airlines Logo
5:00 pm - 10:15 amHRL-LHR
11h 15m1 stop
United Airlines Logo
9:30 am - 9:54 pmLHR-HRL
18h 24m2 stops
$672United Airlines
Find Deal
Tue, Nov 18 - Tue, Nov 25
United Airlines Logo
12:10 pm - 10:50 amHRL-LHR
16h 40m2 stops
United Airlines Logo
7:30 am - 9:54 pmLHR-HRL
20h 24m2 stops
$686United Airlines
Find Deal
Tue, Nov 18 - Tue, Nov 25
United Airlines Logo
12:10 pm - 7:30 amHRL-LHR
13h 20m1 stop
United Airlines Logo
10:00 am - 7:39 pmLHR-HRL
15h 39m1 stop
$691United Airlines
Find Deal
Tue, Nov 18 - Tue, Nov 25
United Airlines Logo
5:15 am - 7:30 amHRL-LHR
21h 15m1 stop
United Airlines Logo
9:30 am - 9:44 pmLHR-HRL
18h 14m2 stops
$790United Airlines
Find Deal
Fri, Mar 27 - Tue, Mar 31
United Airlines Logo
11:55 am - 7:30 amHRL-LHR
14h 35m1 stop
United Airlines Logo
1:40 pm - 9:44 pmLHR-HRL
14h 04m1 stop
$808United Airlines
Find Deal
Fri, Mar 27 - Tue, Mar 31
Iberia Logo
3:22 pm - 10:00 amHRL-LHR
12h 38m1 stop
Iberia Logo
10:35 am - 6:13 pmLHR-HRL
13h 38m1 stop
$984Iberia
Find Deal
Fri, Feb 6 - Wed, Feb 11
Air Canada Logo
5:20 pm - 6:30 amHRL-LHR
55h 10m2 stops
Air Canada Logo
6:00 pm - 9:59 pmLHR-HRL
57h 59m2 stops
$1,214Air Canada
Find Deal
Mon, Dec 22 - Tue, Dec 30
American Airlines Logo
5:34 am - 6:50 amHRL-LHR
19h 16m1 stop
American Airlines Logo
8:20 am - 10:48 pmLHR-HRL
20h 28m1 stop
$1,450American Airlines
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Mon, Dec 22 - Tue, Dec 30
Multiple Airlines Logo
11:43 am - 10:50 amHRL-LHR
17h 07m2 stops
Multiple Airlines Logo
7:50 am - 10:53 amLHR-HRL
33h 03m3 stops
$1,645Multiple Airlines
Find Deal
Mon, Dec 22 - Tue, Dec 30
American Airlines Logo
5:34 am - 6:50 amHRL-LHR
19h 16m1 stop
American Airlines Logo
12:10 pm - 10:48 pmLHR-HRL
16h 38m2 stops
$1,835American Airlines
Find Deal
Mon, Dec 22 - Tue, Dec 30

United Airlines flights from Harlingen, Texas to London Heathrow Airport

Our best United Airlines deals on Harlingen, Texas to London Heathrow Airport flight tickets
United Airlines
Nov 18
HRL5:00 pmHarlingen Valley Intl
11h 15m
1 stop
LHR10:15 amLondon Heathrow
Nov 25
LHR9:30 amLondon Heathrow
18h 24m
2 stops
HRL9:54 pmHarlingen Valley Intl
$672
Find similar
United Airlines
Nov 18
HRL12:10 pmHarlingen Valley Intl
16h 40m
2 stops
LHR10:50 amLondon Heathrow
Nov 25
LHR7:30 amLondon Heathrow
20h 24m
2 stops
HRL9:54 pmHarlingen Valley Intl
$686
Find similar
United Airlines
Nov 18
HRL12:10 pmHarlingen Valley Intl
13h 20m
1 stop
LHR7:30 amLondon Heathrow
Nov 25
LHR10:00 amLondon Heathrow
15h 39m
1 stop
HRL7:39 pmHarlingen Valley Intl
$691
Find similar

American Airlines flights from Harlingen, Texas to London Heathrow Airport

Our best American Airlines deals on Harlingen, Texas to London Heathrow Airport flight tickets
American Airlines
Dec 22
HRL5:34 amHarlingen Valley Intl
19h 16m
1 stop
LHR6:50 amLondon Heathrow
Dec 30
LHR8:20 amLondon Heathrow
20h 28m
1 stop
HRL10:48 pmHarlingen Valley Intl
$1,450
Find similar
American Airlines
Dec 22
HRL5:34 amHarlingen Valley Intl
19h 16m
1 stop
LHR6:50 amLondon Heathrow
Dec 30
LHR12:10 pmLondon Heathrow
16h 38m
2 stops
HRL10:48 pmHarlingen Valley Intl
$1,835
Find similar

momondo Fare Finder

 
Customize 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 832,500 searches. Data last updated October 6, 2025.
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 11/18

5:00 pm-10:15 am

1 stop11h 15m

London Heathrow

Tue 11/25

9:30 am-9:54 pm

2 stops18h 24m

$672

HarlingenLondon

HRL - LHR

HRLLHR

Harlingen Valley Intl

Tue 11/18

12:10 pm-10:50 am

2 stops16h 40m

London Heathrow

Tue 11/25

7:30 am-9:54 pm

2 stops20h 24m

$686

HarlingenLondon

HRL - LHR

HRLLHR

Harlingen Valley Intl

Tue 11/18

12:10 pm-7:30 am

1 stop13h 20m

London Heathrow

Tue 11/25

10:00 am-7:39 pm

1 stop15h 39m

$691

HarlingenLondon

HRL - LHR

HRLLHR

Harlingen Valley Intl

Fri 3/27

5:15 am-7:30 am

1 stop21h 15m

London Heathrow

Tue 3/31

9:30 am-9:44 pm

2 stops18h 14m

$790

HarlingenLondon

HRL - LHR

HRLLHR

Harlingen Valley Intl

Fri 3/27

11:55 am-7:30 am

1 stop14h 35m

London Heathrow

Tue 3/31

1:40 pm-9:44 pm

1 stop14h 04m

$808

HarlingenLondon

HRL - LHR

HRLLHR

Harlingen Valley Intl

Fri 2/6

3:22 pm-10:00 am

1 stop12h 38m

London Heathrow

Wed 2/11

10:35 am-6:13 pm

1 stop13h 38m

$984

HarlingenLondon

HRL - LHR

HRLLHR

Harlingen Valley Intl

Mon 12/22

5:20 pm-6:30 am

2 stops55h 10m

London Heathrow

Tue 12/30

6:00 pm-9:59 pm

2 stops57h 59m

$1,214

HarlingenLondon

HRL - LHR

HRLLHR

Harlingen Valley Intl

Mon 12/22

5:34 am-6:50 am

1 stop19h 16m

London Heathrow

Tue 12/30

8:20 am-10:48 pm

1 stop20h 28m

$1,450

HarlingenLondon

HRL - LHR

HRLLHR

Harlingen Valley Intl

Mon 12/22

11:43 am-10:50 am

2 stops17h 07m

London Heathrow

Tue 12/30

7:50 am-10:53 am

3 stops33h 03m

$1,645

HarlingenLondon

HRL - LHR

HRLLHR

Harlingen Valley Intl

Mon 12/22

5:34 am-6:50 am

1 stop19h 16m

London Heathrow

Tue 12/30

12:10 pm-10:48 pm

2 stops16h 38m

$1,835

Flights are sorted by cheapest round-trip flights first.

Sorted by cheapest first

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 day to depart on your flight to London Heathrow Airport?

Our data shows that Tuesday is the least expensive day to fly to London Heathrow Airport. Tickets to fly out on this day can be as low as $777. The most expensive day to fly to London Heathrow Airport is Thursday, with ticket prices averaging around $1,251.

What is the cheapest time of day to depart on your flight to London Heathrow Airport?

According to our data, the cheapest time of day to fly to London Heathrow Airport is in the morning. momondo users have found flights departing from Harlingen, Texas to London Heathrow Airport in the morning for as low as $777. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. Flights in the evening are often more expensive with an average ticket price of $838.

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 round-trip 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

Direct flights

None
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.
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  • How far is Harlingen Valley Intl to London Heathrow by plane?

    The straight-line distance from Harlingen Valley Intl to London Heathrow is 5112.7 mi. Flights usually cover this in 11h 15m, depending on flying conditions and air traffic around both airports.

  • 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 are refreshed on a daily basis.

  • 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 travel and health documents required for your trip to London Heathrow Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at London Heathrow Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

Traveling to a place near London?

Book flights to London if you plan to visit one of these locations
Gatwick
Hounslow
Milton Keynes
Luton
Dover
Slough
Guildford
Dartford
Hayes
Crawley
Chelmsford
Brentwood
Salisbury
Colchester
Ilford
Folkestone
Romford
Swindon
Stratford-upon-Avon
Cobham

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 allows you to filter the results for Harlingen to London flights to just show those with flexible booking policies.

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

momondo helps you find the best flight between Harlingen and London by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

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

Yes momondo offers price alerts on flights to London from Harlingen. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.

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