United Airlines flights to Colorado (USCO) from £452

Flight Deals

Cheap United Airlines Flight Deals to Colorado

Here are some of the best deals found on KAYAK recently from United Airlines to Colorado 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.

Round-trip

One-way

Last minute

Direct

Recent return United Airlines flight deals from the United Kingdom to Colorado

Sat, 31 Jan - Sat, 31 Jan

07:30 - 18:24LHR-DEN

17h 54m2 stops

21:05 - 07:25DEN-LHR

27h 20m1 stop

£535United Airlines

Find Deal

Wed, 28 Jan - Tue, 3 Feb

06:35 - 14:35LHR-DEN

15h 00m1 stop

11:15 - 07:10DEN-LHR

12h 55m1 stop

£547United Airlines

Find Deal

Mon, 2 Mar - Tue, 28 Apr

11:10 - 18:55LHR-DEN

14h 45m1 stop

17:35 - 09:40DEN-LHR

9h 05mdirect

£548United Airlines

Find Deal

Mon, 2 Feb - Mon, 16 Feb

07:40 - 14:35LHR-DEN

13h 55m1 stop

17:35 - 09:40DEN-LHR

9h 05mdirect

£549United Airlines

Find Deal

Mon, 16 Feb - Thu, 26 Feb

07:30 - 16:00LHR-DEN

15h 30m1 stop

23:59 - 20:35DEN-LHR

13h 36m2 stops

£550United Airlines

Find Deal

Sat, 31 Jan - Sat, 31 Jan

11:35 - 14:25LHR-DEN

9h 50mdirect

17:50 - 07:25DEN-LHR

30h 35m1 stop

£559United Airlines

Find Deal

Wed, 15 Apr - Thu, 23 Apr

07:25 - 14:20LHR-DEN

13h 55m1 stop

20:20 - 12:20DEN-LHR

9h 00mdirect

£560United Airlines

Find Deal

Tue, 28 Apr - Thu, 7 May

09:00 - 18:45LHR-DEN

16h 45m1 stop

20:20 - 12:20DEN-LHR

9h 00mdirect

£560United Airlines

Find Deal

Tue, 16 Dec - Thu, 1 Jan

06:35 - 14:35LHR-DEN

15h 00m1 stop

11:15 - 07:10DEN-LHR

12h 55m1 stop

£569United Airlines

Find Deal

Wed, 10 Dec - Thu, 25 Dec

06:35 - 14:35LHR-DEN

15h 00m1 stop

08:45 - 11:50DEN-LHR

20h 05m1 stop

£569United Airlines

Find Deal

Useful Info

Low season	February
High season	September
Cheapest flight	£452
Average price round-trip	£547

Best time to beat the crowds (22% less expensive on average)

Most popular time to fly and prices are also 22% lower on average.

Flight from London Heathrow Airport to Denver

(price for this month)

KAYAK's insights & trends for flights to Colorado

Get data-powered insights and trends for flights to Colorado to help you find the cheapest flights, the best time to fly and much more.

Prices

Based on KAYAK data, the cheapest day to fly to Colorado is Wednesday when return tickets can be as cheap as £644. On the other hand, the most expensive day to fly is Sunday, when return prices are £723 on average.

What is the cheapest month to fly from the United Kingdom to Colorado?

The cheapest month for flights from the United Kingdom to Colorado is March, when tickets cost £493 (return) on average. On the other hand, the most expensive months are December and July, when the average cost of round-trip tickets is £808 and £694 respectively.

How far in advance should I book a flight from the United Kingdom to Colorado?

To get a below-average price on a flight from the United Kingdom to Colorado, you should book around 2 weeks before departure, which saves you about 32% compared to booking last-minute. For the absolute cheapest price, our data suggests you should book 8 weeks before departure.

Find deals

7.4

Good9,019 verified ratings

7.3Comfort

7.1Entertainment

7.7Boarding

8.1Crew

6.6Food

Pros +

Flight was quick and easy. (in 2447 reviews)

Cons -

Have the middle seats vacant. (in 137 reviews)
The space in economy plus. (in 296 reviews)

Show reviews that mention

10.0 Wonderful

Mike, Nov 2025

I dread trans-Pacific flights. They are very long. This was my first time on Universal, and it was my best crossing ever. The staff were professional, the hospitality was great, and the food was delicious. The entertainment system filled the long flight hours. I will seek out Universal flights from now onwards. 🙂

8.0 Very Good

Anonymous, Nov 2025

on time and entertainment on board

10.0 Wonderful

Paul, Nov 2025

United has come a long way, it’s been a fantastic experience traveling with them.

10.0 Wonderful

Anonymous, Nov 2025

The whole experience was excellent

10.0 Wonderful

Anonymous, Nov 2025

The whole experience was excellent

8.0 Very Good

David, Nov 2025

Even though we were delayed, we were able to make our connection

10.0 Wonderful

Claire, Nov 2025

Seats in waiting area and on plane hard as rock. Fast internet on the flight was great! Crew was kind.

10.0 Wonderful

David, Nov 2025

Starlink wifi on the Embraer E175 is an excellent experience. I was able to connect and work from IAD all the way to approach into BTV.

10.0 Wonderful

Gheorghe, Nov 2025

Is my favorite Lufthansa?

8.0 Very Good

Semra, Nov 2025

Good trip. Good crew. Thank you!

Everything you need to know for your flight to Colorado

Airlines

Cabin class

Complete your trip

Flights to other cities

Origins

Popular routes

Return flight deals

United Airlines flights

Airlines flying to Colorado

Lufthansa flights to Colorado

Icelandair flights to Colorado

British Airways flights to Colorado

Find cheap United Airlines flights to Colorado from £452

Search hundreds of travel sites at once for deals on United Airlines flights to Colorado

Cheap United Airlines Flight Deals to Colorado

Recent return United Airlines flight deals from the United Kingdom to Colorado

Recent one-way United Airlines flight deals from the United Kingdom to Colorado

Recent last minute United Airlines flight deals from the United Kingdom to Colorado

Recent direct United Airlines flight deals from the United Kingdom to Colorado

Good to know

KAYAK's insights & trends for flights to Colorado

Get data-powered insights and trends for flights to Colorado to help you find the cheapest flights, the best time to fly and much more.

What is the cheapest day to fly to Colorado?

Based on KAYAK data, the cheapest day to fly to Colorado is Wednesday when return tickets can be as cheap as £644. On the other hand, the most expensive day to fly is Sunday, when return prices are £723 on average.

What is the cheapest month to fly from the United Kingdom to Colorado?

The cheapest month for flights from the United Kingdom to Colorado is March, when tickets cost £493 (return) on average. On the other hand, the most expensive months are December and July, when the average cost of round-trip tickets is £808 and £694 respectively.

How far in advance should I book a flight from the United Kingdom to Colorado?

To get a below-average price on a flight from the United Kingdom to Colorado, you should book around 2 weeks before departure, which saves you about 32% compared to booking last-minute. For the absolute cheapest price, our data suggests you should book 8 weeks before departure.

How many airports are there in Colorado?

There are 9 airports in Colorado. The busiest airport is Denver Airport (DEN), with 93% of all flights arriving there.

How long is the flight to Colorado?

An average direct flight from the United Kingdom to Colorado takes 20h 30m, covering a distance of 4593 miles. The shortest route is London Heathrow Airport (LHR) to Denver (DEN) with an average flight time of 9h 50m.

How many direct flights to Colorado are there each day?

There are around 1 direct flights from within United Kingdom to Colorado every day. All flights depart in the morning.

How many direct flights to Colorado are there each week?

Each week there are around 7 direct flights from within United Kingdom to Colorado. The most common day for departures is Monday, with 14% of flights taking off on this day.

How many long-haul flights are there to Colorado each week?

There aren’t any medium-haul (3-6 hour flight duration) or short-haul (up to 3 hour flight duration) flights to Colorado. Instead, there are 7 long-haul flights (6-12 hour flight duration), with the most arriving from London.

How many cities have direct flights to Colorado?

From the United Kingdom, there are direct flights to Colorado from one city. This city is London and there are 7 direct flights each week.

What are the most popular destinations in Colorado?

Based on KAYAK flight searches, the most popular destination is Denver (95% of total searches to Colorado). The next most popular destinations are Colorado Springs (4%) and Vail (0%). Searches for flights to Gunnison (0%) and to Montrose (0%) are also popular.

United Airlines customer reviews

Pros +

Cons -

Traveller rating:

Sort by:

Everything you need to know for your flight to Colorado

Airlines flying to Colorado

Cabin class types available on flights to Colorado

Complete your trip to Colorado with a hotel stay or car hire

Flights to other popular destinations

Flights from domestic origins to Colorado

Flights to popular cities in Colorado

Find deals for your return flight

Top United Airlines flights