Can I get a flight from London Heathrow Airport to Cancún on United Airlines for under £978?

There are 9 flights available on United Airlines from London Heathrow Airport to Cancún for under £978. These prices can change based on many factors including date and time. To find LHR-CUN flight prices for your dates, click here.

In terms of precipitation, rainfall in Cancún ranges from 29.0 - 282.0 inches per month. October is typically the wettest month, when rainfall can reach 282.0 mm. April is typically the driest time to visit Cancún when rainfall is around 29.0 mm.

If weather is an important factor for your trip to Cancún, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 30.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 24.0 C).

£399+ United Airlines Flights from Heathrow to Cancún

Cheapflights users flying from London to Cancún on United Airlines typically fly into Cancun and depart from London Heathrow. Select your dates above for pricing.

United Airlines flights from Heathrow to Cancún in 2025

One-way from	£399
Return from	£552
Popular in	December
Cheapest in	September
Average price (all airlines)	£913

United Airlines
16/2
2 total stops
27h 50m total
London to Cancún

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United Airlines
23/12-11/1
2 total stops
49h 00m total
London to Cancún

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Highest demand for flights from London Heathrow to Cancun; 3% potential price increase.

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Best time to find cheap flights from London Heathrow to Cancun; 3% potential price drop.

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Average price for all London Heathrow to Cancun flights (one-way and round-trip).

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Can I get a flight from London Heathrow Airport to Cancún on United Airlines for under £978?
There are 9 flights available on United Airlines from London Heathrow Airport to Cancún for under £978. These prices can change based on many factors including date and time. To find LHR-CUN flight prices for your dates, click here.

Find United Airlines flight deals from Heathrow to Cancún

Enter your travel dates to find the best prices.

Cheapest United Airlines flights from Heathrow to Cancún
Explore the most affordable United Airlines flight options available from Heathrow to Cancún. Find the lowest fares with prices last updated on 4 December 2025.

Fri 12/1213:45LHR - CUN

1 stop30h 39mUnited Airlines

Sun 14/1206:30CUN - LHR

1 stop20h 00mUnited Airlines

Deal found 3/12£546

Tue 23/1216:20LHR - CUN

2 stops30h 30mUnited Airlines

Wed 7/116:20CUN - LHR

2 stops24h 00mUnited Airlines

Deal found 3/12£552

Thu 11/1210:00LHR - CUN

1 stop15h 18mUnited Airlines

Fri 9/115:07CUN - LHR

1 stop17h 23mUnited Airlines

Deal found 3/12£556

Best United Airlines flights from Heathrow to Cancún
Discover carefully curated United Airlines flight deals from Heathrow to Cancún that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 4 December 2025.

Tue 23/1215:20LHR - CUN

1 stop34h 03mUnited Airlines

Thu 8/108:23CUN - LHR

2 stops17h 17mUnited Airlines

Deal found 3/12£552

Thu 25/1210:00LHR - CUN

1 stop15h 18mUnited Airlines

Thu 8/114:44CUN - LHR

1 stop14h 31mUnited Airlines

Deal found 3/12£552

Tue 23/1215:20LHR - CUN

1 stop34h 03mUnited Airlines

Mon 12/115:18CUN - LHR

1 stop14h 57mUnited Airlines

Deal found 3/12£552

Last-minute United Airlines flights from Heathrow to Cancún
Discover last-minute United Airlines flight deals from Heathrow to Cancún. Data last updated 4 December 2025 and is based on user searches.

Fri 12/1213:45LHR - CUN

1 stop30h 39mUnited Airlines

Sun 14/1206:30CUN - LHR

1 stop20h 00mUnited Airlines

Deal found 3/12£546

Tue 23/1216:20LHR - CUN

2 stops30h 30mUnited Airlines

Wed 7/116:20CUN - LHR

2 stops24h 00mUnited Airlines

Deal found 3/12£552

Thu 11/1210:00LHR - CUN

1 stop15h 18mUnited Airlines

Fri 9/115:07CUN - LHR

1 stop17h 23mUnited Airlines

Deal found 3/12£556

One-way United Airlines flights to Cancún
Search for one-way United Airlines flight options to Cancún. Find affordable one-way fares based on user searches. Data last updated 4 December 2025.

Mon 16/213:30LHR - CUN

2 stops27h 50mUnited Airlines

Deal found 3/12£399

Thu 15/112:05LHR - CUN

1 stop34h 45mUnited Airlines

Deal found 3/12£422

Tue 6/113:25LHR - CUN

2 stops28h 29mUnited Airlines

Deal found 2/12£606

Travel insights for United Airlines flights from Heathrow to Cancún

Get recent, data-driven insights about United Airlines flights from Heathrow to Cancún including ideal travel times, pricing trends, and more.

Prices

How far ahead should I book a flight from London Heathrow Airport to Cancún with United Airlines?

Booking with United Airlines 52 days in advance of your planned departure date is, on average, the best time to get cheap flights from London Heathrow Airport to Cancún. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

Best time to book a flight from Heathrow to Cancún

Have a flexible travel schedule? Discover the best time to fly to Cancún from Heathrow with our price prediction graph.

Estimated return 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.

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See what others are saying about United Airlines

United Airlines

7.4

Good

9,063 reviews

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Overview

Recent reviews

10.0

Wonderful|Dec 2025

Smooth flight from Austin to Newark. The crew was friendly.

2.0

Poor|Oct 2025

The worst that I have ever experienced in my life so bad if it was free I'm not ever going to use your Airline again I dont believe ..... very disappointed 😞 😔0000000000000

8.0

Very Good|Oct 2025

Crew and customer service are 5 stars. I had a lot of luggage for a very long trip and they were nothing but helpful and found solutions to every problem. It was my first time flying with United, and they really are the friendly skies. Leg room however, on 2/3 flights was terrible. Same for entertainment: There was only a seat-mounted screen on 1/3 flights. It would have been nice to have on the longest leg of the journey.

4.0

Mediocre|Sept 2025

This was pretty bad. It’s chaos at the Dulles boarding gates for the small regional jets because they use one gate to board 3-4 flights at a time. So, it’s difficult knowing where and when to go. There is little space for any size of carrry-on, so most had to gate check their bags. However, the worst of it was that our single flight attendant fell asleep before we took off and the pilot couldn’t do so until she responded to his messages. My wife had to wake her up! So we were a little late leaving. Not to be thwarted, the flight attendant fell asleep right after take off and there was no sight of her during the flight. When the aircraft touched down, a tray of unsecured canned drinks came crashing onto the aisle up front. I can only assume someone didn’t do what they were supposed to. The pilot was great, but I’m sure he must not be happy with this crew member.

10.0

Wonderful|Sept 2025

The premium economy seats were very comfortable and the attention and service by the flight attendants was superb.

1 out of 3021

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United Airlines flights from London Heathrow Airport to Cancún (LHR - CUN)

Cheapflights users flying from London to Cancún on United Airlines typically fly into Cancun and depart from London Heathrow. Select your dates above for pricing.

United Airlines flights from Heathrow to Cancún in 2025

Find detailed information about United Airlines flights from Heathrow to Cancún. Explore the options provided by United Airlines to plan your journey from Heathrow to Cancún. Data last updated 4 December 2025.

One-way from

Return from

Popular in

Cheapest in

Average price (all airlines)

Can I get a flight from London Heathrow Airport to Cancún on United Airlines for under £978?

Find United Airlines flight deals from Heathrow to Cancún

Cheapest United Airlines flights from Heathrow to CancúnExplore the most affordable United Airlines flight options available from Heathrow to Cancún. Find the lowest fares with prices last updated on 4 December 2025.

Explore the most affordable United Airlines flight options available from Heathrow to Cancún. Find the lowest fares with prices last updated on 4 December 2025.

Travel insights for United Airlines flights from Heathrow to Cancún

Get recent, data-driven insights about United Airlines flights from Heathrow to Cancún including ideal travel times, pricing trends, and more.

How far ahead should I book a flight from London Heathrow Airport to Cancún with United Airlines?

Rainfall in Cancún by month

Temperature in Cancún by month

Best time to book a flight from Heathrow to Cancún

Have a flexible travel schedule? Discover the best time to fly to Cancún from Heathrow with our price prediction graph.

Browse thousands of different options on Cheapflights for your next trip

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Fly from Heathrow to Cancún on another airline

Consider alternative airlines that service the Cancún area. Flight routes are based on user searches made on Cheapflights and were last updated on 4 December 2025.

See what others are saying about United Airlines

Overview

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Cheapest United Airlines flights from Heathrow to Cancún
Explore the most affordable United Airlines flight options available from Heathrow to Cancún. Find the lowest fares with prices last updated on 4 December 2025.