MFE - LHR

$546 Find Cheap Flights from McAllen to London Heathrow Airport

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

KAYAK searches hundreds of travel sites at once for deals on flights to London Heathrow Airport

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from McAllen to London, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from McAllen to London, as well as popular online travel agencies
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Everything you should know

Cheapest round-trip
$646
United Airlines
Sat 5/2Fri 5/15
MFE - LHR • 1 stop
Cheapest one-way
$548
United Airlines
Fri 3/13
MFE - LHR • 1 stop
Top airlines
United Airlines
Cheapest • from $659 (round-trip)
United Airlines
Best reviews • 7.4 score
Airline reviews
Airline reviews
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+1
Airline reviews
Airline reviews
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Booking Insights
Flight Deals

Cheap Flights from McAllen to London (MFE-LHR)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from McAllen to London that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from McAllen to London

Sat, May 2 - Fri, May 15
United Airlines Logo
6:59 pm - 7:40 am
MFE
-
LHR
30h 41m
1 stop
United Airlines Logo
7:25 am - 10:59 pm
LHR
-
MFE
21h 34m
2 stops
$646United Airlines
Wed, May 6 - Thu, May 14
United Airlines Logo
7:00 am - 6:30 am
MFE
-
LHR
17h 30m
2 stops
United Airlines Logo
7:25 am - 9:48 pm
LHR
-
MFE
20h 23m
2 stops
$650United Airlines
Tue, May 5 - Fri, May 15
United Airlines Logo
5:15 am - 6:55 am
MFE
-
LHR
19h 40m
2 stops
United Airlines Logo
6:55 am - 7:54 pm
LHR
-
MFE
18h 59m
2 stops
$651United Airlines
Tue, May 5 - Tue, May 12
United Airlines Logo
5:15 am - 11:35 am
MFE
-
LHR
24h 20m
1 stop
United Airlines Logo
9:30 am - 10:59 pm
LHR
-
MFE
19h 29m
2 stops
$657United Airlines
Thu, Feb 26 - Mon, Mar 2
United Airlines Logo
5:13 am - 10:15 am
MFE
-
LHR
23h 02m
1 stop
United Airlines Logo
12:05 pm - 6:03 pm
LHR
-
MFE
35h 58m
1 stop
$659United Airlines
Thu, Feb 26 - Mon, Mar 2
United Airlines Logo
5:13 am - 7:30 am
MFE
-
LHR
20h 17m
1 stop
United Airlines Logo
1:25 pm - 6:03 pm
LHR
-
MFE
34h 38m
2 stops
$662United Airlines
Thu, Feb 26 - Mon, Mar 2
United Airlines Logo
9:15 am - 7:30 am
MFE
-
LHR
16h 15m
1 stop
United Airlines Logo
8:00 am - 9:42 pm
LHR
-
MFE
19h 42m
2 stops
$663United Airlines
Sun, May 3 - Fri, May 15
Delta Logo
5:25 am - 7:10 am
MFE
-
LHR
19h 45m
2 stops
Delta Logo
11:15 am - 11:59 pm
LHR
-
MFE
18h 44m
2 stops
$669Delta
Tue, Mar 24 - Tue, Mar 31
United Airlines Logo
7:05 pm - 10:15 am
MFE
-
LHR
34h 10m
1 stop
United Airlines Logo
5:40 pm - 9:48 pm
LHR
-
MFE
34h 08m
2 stops
$677United Airlines
Sat, May 2 - Tue, May 12
United Airlines Logo
6:59 pm - 7:40 am
MFE
-
LHR
30h 41m
1 stop
United Airlines Logo
9:30 am - 10:59 pm
LHR
-
MFE
19h 29m
2 stops
$678United Airlines
Booking Insights

KAYAK's insights & trends for McAllen to London flights

Get data-powered insights and trends into flights from McAllen to London to help you find the cheapest flights, the best time to fly and much more.

Which airlines provide the cheapest flights from McAllen to London Heathrow Airport?

The cheapest round-trip price for the route for each airline clicked by KAYAK users in the last 72 hours.

In the past 3 days, the cheapest round-trip tickets from McAllen to London Heathrow Airport were found on United Airlines ($659) and British Airways ($690).

Good to know

Low seasonSeptember
Cheapest flight$548
Best time to beat the crowds with an average 38% drop in price.
Most popular time to fly with an average 42% increase in price.
Flight from McAllen to London Heathrow Airport

When to book flights from McAllen to London

Are your dates flexible? Find out the best times to travel from McAllen to London based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking McAllen to London Heathrow Airport flights

  • What is the cheapest flight from McAllen to London Heathrow Airport?

    In the last 3 days, the lowest price for a flight from McAllen to London Heathrow Airport was $548 for a one-way ticket and $659 for a round-trip.

  • Do I need a passport to fly between McAllen and London Heathrow Airport?

    Yes, you'll most likely have to show a valid passport before boarding the plane in McAllen and on arrival in London Heathrow Airport.

  • Which airports will I be using when flying from McAllen to London Heathrow Airport?

    McAllen airport is called McAllen Miller Intl and the only airport in London Heathrow Airport is London Heathrow.

  • Which aircraft models fly most regularly from McAllen to London Heathrow Airport?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from McAllen to London Heathrow Airport?

    Star Alliance, and oneworld are the airline alliances operating flights between McAllen and London Heathrow Airport, with Star Alliance being the most commonly used for this route.

  • Which is the best airline for flights from McAllen to London, United Airlines or American Airlines?

    The two airlines most popular with KAYAK users for flights from McAllen to London are United Airlines and American Airlines. With an average price for the route of $1,576 and an overall rating of 7.4, United Airlines is the most popular choice. American Airlines is also a great choice for the route, with an average price of $1,576 and an overall rating of 7.2.

  • How does KAYAK find such low prices on flights from McAllen to London Heathrow Airport?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from McAllen to London Heathrow Airport.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from McAllen to London Heathrow Airport?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to London Heathrow Airport from McAllen is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from McAllen to London Heathrow Airport?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to London Heathrow Airport with an airline and back to McAllen with another airline. Booking your flights between McAllen and LHR can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from McAllen to London Heathrow Airport?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to London Heathrow Airport from McAllen up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top 3 airlines serving from McAllen to London

 
See real verified KAYAK customer reviews for airlines flying from McAllen to London. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from McAllen to London? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.4
United AirlinesOverall score based on 9210 reviews
7.7Boarding
8.1Crew
7.1Entertainment
7.3Comfort
6.6Food
Airline reviews

Delayed, toilets did not flush, pilot parked to far away from Gate

2.0 MediocreLisa, Jan 2026
ELP - IAH
Read more United Airlines reviews

Delayed, toilets did not flush, pilot parked to far away from Gate

I like flying first class, and United has a nice one

Some flight attendants were great others were cranky. Seats were very tight and sitting on an aisle was very hard as the carts and people walking constantly bumped shoulder and arm.

Unbelievably poor service from flight attendants. They didn’t even do water service on a four hour flight. Just disrespectful.

Seats had less pitch than a regional jet. Food was OK. Have to buy alcohol on US based carriers flying international. Boarding was a mess. Did not have bags but overhead space was gone quick. Would like to see the airlines enforce the one bag over and one bag under policy

Lately I like the planes have been exceptionally filthy. There’s lines of dust and dirt all across the ceiling in the vents, and the cracks in between the seats are literally full of food. It’s definitely not the quality of service that I was used to with United. I’m also very disappointed with the Wi-Fi! All I wanna do is knock out a few work jobs while I’m trapped in my seat And it spools so bad. They did provide me with a refund, but the process of getting that refund is so complicated. It’s unfortunate.

Crew was excellent. This was a relatively long flight though and had very little leg room, and no entertainment.

The newer screen was super cool and had the option to watch many different shows or movies. Crew was polite and helpful. However again, many children screaming bloody murder and kicking my seat, and parents doing nothing about it as usual.

Flight was good and crew was super polite. However, there were around 5 kids screaming the WHOLE 2 hours. I understand kids have to come but parents need to do something to control their children. They make the experience terrible, especially after finishing 16 hour shifts at the hospital I needed some sleep, which I did not get.

Plane was crowded and even when we hit altitude, the plane was hot, not enough air flow.

My flight to London from Philadelphia was cancelled due to weather.

Disliked having to wait a little longer to disembark from the plan when we landed in London

Food should be better quality. Video screens have poor resolution and the library of movies is poor. The other airlines are much better.

The trip was smooth but the crew were very abrupt, snatching things before finished and being quite snappy when asked questions.

My wife and I love to travel, so we fly a lot. We've already logged 381,075 miles and with practically every major airline. But this flight was very disappointing. It started off well, with no delays and a new plane. But when lunchtime approached, all that good impression was ruined. Instead of white tablecloths, we were offered small, dark placemats, which, as it turned out, were perfectly adequate for the food. All the food offered—and my wife and I only took fish, and the meat—was not just bad, it was downright disgusting and not heated enough. The same applies to the appetizers. This was the first time in many years of traveling that we've been offered such disgusting food.

Lost luggage stuck no clothes and no word after 2 days leaving on cruise no stuff or clothes

Don’t know they cancelled the flight day before I was to leave. They sent a email at 9:00 pm at night saying they cancelled. That is the smooth way to say we don’t want your business! I think they didn’t have enough people booking so they cancelled the flight! It’s all about the money anymore there is no honesty in business.

The flight was canceled 3 hours after original take off time

Pathetic check in experience at JFK. Everything is self check in. Not enough staff present to help with when the check in process or the kiosk gets stuck. Staff present not welcoming or pleasant at all. On the other hand the NY based flight crew was great. Courteous and friendly throughout the flight. Special meals leave a lot to be desired. Kids meals should be made available when kids are flying and same goes for special kids meals too.

Flight was full, and would have preferred an aisle seat, but due to getting a late ticket ,the seat I had was adequate. The flight crew were very help full and hard working. Food and drink were excellent for the 11hr flight. Overall I was pleased with flight, and would recommend British Airways again.

The issue was not with BA it was with the link yoiu sent fopr booking the flight

Loved the boarding option from Business class lounge, experience on flight was excellent, plenty of good food choices

The airline was not clear about a new departure time so we got to the airport early anyway. The flight left early which was great because of weather. The check in process was very easy and staff were friendly and helpful. The crew was great and our flight was very good.

Awful it always is unfortunately is the only way to fly direct to london

I travelled in business class and was disappointed by lack of service, curt and borderline rude time of the crew and to top it off, all of my luggage was delayed. It was like pulling teeth to even report the missing luggage and recover it the next day from the airport.

Boarding was poor. All groups called immediately one after the other resulting in a long queue in the jetty/jet bridge. Seats were very hard and and did not recline on a 4.5 hour flight. No food was available. Plane was cold. There was no entertainment.

The cramped seats are cruel and unusual punishment and may violate the Geneva code.

Check in was was and the agent was very friendly and helpful The lounge was nice...boarding was straight from the lounge Everything worked at our seats, and video entertainment was good ..food was mediocre

The flight was excellent in World Travellor plus. Well worth the extra money. Boarding at Phoenix was the usual poorly organized event. Very stressful.

Although business class, the seating was really cramped. The food was so so.

Everything you need to know for your flight from McAllen to London

Information on your arrival and departure airports