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$629+ Cheap flights from McAllen (MFE) to Heathrow (LHR)

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 11/3. Fares are subject to change and may not be available on all flights or dates of travel.
MFE — LHR
Oct 11 — Oct 181
Sat 10/11
Sat 10/18
1 adult, Economy
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Cheap flight deals from McAllen to Heathrow

Discover tips and strategies to find the most affordable flight options for your journey from McAllen (MFE) 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 September 11, 2025.

Round-trip from

$629
(United Airlines)

Popular in

June

Cheapest in

August

Average price

$700
From McAllen Miller Intl to London Heathrow
Search Deals
Highest demand for flights based on searches. 22% potential increase in price ($274 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 6% potential price decrease ($58 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in September 2025
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Find flight deals from McAllen to Heathrow

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

This United Airlines deal was found by Cheapflights users on 9/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/37:22 pmMFE - LHR
1 stop30h 08mUnited Airlines
Tue 11/112:30 pmLHR - MFE
2 stops37h 29mUnited Airlines
Deal found 9/11$629
This United Airlines deal was found by Cheapflights users on 9/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/57:00 amMFE - LHR
1 stop18h 30mUnited Airlines
Fri 11/1412:05 pmLHR - MFE
1 stop14h 03mUnited Airlines
Deal found 9/11$652
This United Airlines deal was found by Cheapflights users on 9/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/307:00 amMFE - LHR
1 stop18h 30mUnited Airlines
Mon 12/2210:00 amLHR - MFE
1 stop19h 25mUnited Airlines
Deal found 9/9$683
This Delta deal was found by Cheapflights users on 9/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/15:25 amMFE - LHR
2 stops20h 25mDelta
Mon 12/223:50 pmLHR - MFE
2 stops26h 04mDelta
Deal found 9/9$685
This United Airlines deal was found by Cheapflights users on 9/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/25:00 amMFE - LHR
1 stop20h 30mUnited Airlines
Mon 12/2210:00 amLHR - MFE
1 stop19h 25mUnited Airlines
Deal found 9/9$689
This United Airlines deal was found by Cheapflights users on 9/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/412:10 pmMFE - LHR
1 stop13h 20mUnited Airlines
Mon 12/2210:00 amLHR - MFE
1 stop19h 25mUnited Airlines
Deal found 9/9$696
This United Airlines deal was found by Cheapflights users on 9/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/312:10 pmMFE - LHR
2 stops16h 40mUnited Airlines
Mon 12/2210:00 amLHR - MFE
1 stop19h 25mUnited Airlines
Deal found 9/9$720
This Booking.com deal was found by Cheapflights users on 9/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/32:49 pmMFE - LHR
1 stop13h 11mBritish Airways
Tue 11/118:20 amLHR - MFE
1 stop20h 59mBritish Airways
Deal found 9/11$725
This Delta deal was found by Cheapflights users on 9/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/45:25 amMFE - LHR
2 stops19h 00mDelta
Mon 12/223:50 pmLHR - MFE
2 stops26h 04mDelta
Deal found 9/9$735
This Delta deal was found by Cheapflights users on 9/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/55:14 pmMFE - LHR
2 stops38h 36mDelta
Fri 11/1411:45 amLHR - MFE
2 stops58h 59mDelta
Deal found 9/11$748

Cheapflights Fare Finder

 
Customize your flight search to find flights from McAllen 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 2,558,603 searches. Data last updated September 11, 2025.
Use the filters below to find and compare flights from McAllen to London Heathrow Airport that are best for you.

Fly from

McAllen

Fly to

Heathrow

Route

Depart

Return

Price

McAllenLondon

MFE - LHR

MFELHR

McAllen Miller Intl

Mon 11/3

7:22 pm-7:30 am

1 stop30h 08m

London Heathrow

Tue 11/11

2:30 pm-9:59 pm

2 stops37h 29m

$629

McAllenLondon

MFE - LHR

MFELHR

McAllen Miller Intl

Wed 11/5

7:00 am-7:30 am

1 stop18h 30m

London Heathrow

Fri 11/14

2:30 pm-9:59 pm

2 stops37h 29m

$629

McAllenLondon

MFE - LHR

MFELHR

McAllen Miller Intl

Sun 11/30

7:00 am-7:30 am

1 stop18h 30m

London Heathrow

Mon 12/22

10:00 am-11:25 pm

1 stop19h 25m

$683

McAllenLondon

MFE - LHR

MFELHR

McAllen Miller Intl

Wed 12/3

7:00 am-7:30 am

1 stop18h 30m

London Heathrow

Mon 12/22

10:00 am-11:25 pm

1 stop19h 25m

$683

McAllenLondon

MFE - LHR

MFELHR

McAllen Miller Intl

Wed 12/3

5:25 am-9:00 am

2 stops21h 35m

London Heathrow

Mon 12/22

3:50 pm-11:54 am

2 stops26h 04m

$685

McAllenLondon

MFE - LHR

MFELHR

McAllen Miller Intl

Tue 12/2

5:25 am-7:50 am

2 stops20h 25m

London Heathrow

Mon 12/22

8:55 am-11:59 pm

2 stops21h 04m

$685

McAllenLondon

MFE - LHR

MFELHR

McAllen Miller Intl

Mon 12/1

5:25 am-7:50 am

2 stops20h 25m

London Heathrow

Mon 12/22

3:50 pm-11:54 am

2 stops26h 04m

$685

McAllenLondon

MFE - LHR

MFELHR

McAllen Miller Intl

Tue 12/2

5:00 am-7:30 am

1 stop20h 30m

London Heathrow

Mon 12/22

10:00 am-11:25 pm

1 stop19h 25m

$689

McAllenLondon

MFE - LHR

MFELHR

McAllen Miller Intl

Thu 12/4

12:10 pm-7:30 am

1 stop13h 20m

London Heathrow

Mon 12/22

10:00 am-11:25 pm

1 stop19h 25m

$696

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/11

Best time to book a flight from McAllen to Heathrow

Have a flexible travel schedule? Discover the best time to fly to Heathrow from McAllen with our price prediction graph.
Estimated round-trip 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 McAllen to London Heathrow Airport

What is the cheapest month to book a flight from McAllen to London Heathrow Airport?

Currently, November is the cheapest month in which you can book a flight from McAllen to London Heathrow Airport (average of $661). Flying from McAllen to London Heathrow Airport in June is currently the most expensive (average of $1,098). 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.

What is the cheapest time of day to fly from MFE to LHR?

Find hourly flight availability from McAllen to Heathrow. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated September 11, 2025.

When flying from McAllen to London Heathrow Airport, the time of day you fly usually plays a role in the price. Save by searching for a flight in the afternoon, which can drop the price by up to 25% versus a flight in the evening.

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 September 11, 2025.
See what other customers who have flown with United Airlines, American Airlines, and British Airways from McAllen 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
8,937 reviews

Boarding

7.7

Crew

8.1

Entertainment

7.1

Overall

7.4

Comfort

7.3

Food

6.6

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
8,937 reviews
United Airlines
7.4
Good
8,937 reviews

Boarding

7.7

Crew

8.1

Entertainment

7.1

Overall

7.4

Comfort

7.3

Food

6.6

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
8,937 reviews

Boarding

7.7

Crew

8.1

Entertainment

7.1

Overall

7.4

Comfort

7.3

Food

6.6

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??
British Airways
6.7
Okay
7,361 reviews
United Airlines
7.4
Good
8,937 reviews

Boarding

7.7

Crew

8.1

Entertainment

7.1

Overall

7.4

Comfort

7.3

Food

6.6

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 McAllen 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 McAllen to London Heathrow?

    Most people fly from McAllen Miller Intl (MFE) if they book a flight from McAllen to London Heathrow. On average, Miller Intl has 0 outbound flights to London Heathrow per day from 3 airlines. McAllen Miller Intl is conveniently located just 2.0 mi from McAllen’s city center.

  • How long is the flight from McAllen to London Heathrow Airport?

    United Airlines can get you from McAllen to London Heathrow Airport in just under 30h 08m. Your travel time can differ by up to . There are 5135 mi between McAllen and London Heathrow Airport.

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

    Currently priced at $680, British Airways will fly you from McAllen to London Heathrow Airport and back. In addition to British Airways, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from United Airlines and American Airlines - these airlines can fly you to your destination from $682 and $880, respectively. British Airways is currently priced 28% below the average price you’ll pay for this route.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from McAllen 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 McAllen to London Heathrow Airport?

    Currently, November is the cheapest month in which you can book a flight from McAllen to London Heathrow Airport (average of $661). Flying from McAllen to London Heathrow Airport in June is currently the most expensive (average of $1,098). 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

Traveling to a place near London Heathrow Airport?

Book flights to London Heathrow Airport if you plan to visit one of these locations
Hounslow
Hayes
Thornton Heath
Southend-on-Sea
Harrow
Canterbury
Croydon
Eastleigh
Dartford
Dover
Winchester
Orpington
Northampton
Gatwick
Borehamwood
Broadway
Aylesbury
Bedford
Wembley
Folkestone

Browse thousands of different options on Cheapflights for your next trip

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Top 3 airlines flying from McAllen to Heathrow

Discover the top 3 airlines that operate flights from McAllen to Heathrow. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated September 11, 2025.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest$680Average$1,008FlexibilityNo cancel feeOn-time70%
United AirlinesCheapest$682Average$1,070FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$880Average$1,086FlexibilityNo cancel feeOn-time71%

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