$334 Find Cheap Flights from Colorado to Northern Ireland

1 adult
1 adult, Economy

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Useful Info
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Good to know

Low seasonFebruary
High seasonSeptember
Cheapest flight$334
Best time to beat the crowds with an average 25% drop in price.
Most popular time to fly and prices are also 21% lower on average.
Flight from Denver to Belfast Intl Airport

FAQs for booking flights from Colorado to Northern Ireland

  • How does KAYAK find such low prices on flights from Colorado to Northern Ireland?

    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 Colorado to Northern Ireland.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Colorado to Northern Ireland?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight from Colorado to Northern Ireland 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 Colorado to Northern Ireland?

    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 from Colorado to Northern Ireland with an airline and back with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Colorado to Northern Ireland?

    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 from Colorado to Northern Ireland up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

  • What is the cheapest day to fly to Northern Ireland?

    Based on KAYAK data, the cheapest day to fly to Northern Ireland is Thursday where round-trip tickets can be as cheap as $688. On the other hand, the most expensive day to fly is Friday, where round-trip prices are $1,000 on average.

  • What is the cheapest time of day to fly to Northern Ireland?

    The cheapest time of day to fly to Northern Ireland is generally in the morning, when round-trip flights cost $675 on average. Morning departures are around 9% cheaper than evening flights, on average. The most expensive time of day to fly to Northern Ireland is generally in the evening, which is peak travel time and where the average cost of a ticket is $745.

  • How long is the flight to Northern Ireland?

    An average nonstop flight from Colorado to Northern Ireland takes 11h 40m, covering a distance of 4341 miles. The shortest route is Denver (DEN) to Belfast Intl Airport (BFS) with an average flight time of 11h 40m.

  • What is the most popular destination in Northern Ireland?

    Based on KAYAK flight searches, the most popular destination is Belfast (100% of total searches to Northern Ireland).

Top airline flying from Colorado to Northern Ireland

 
Need help choosing which airline to fly with from Colorado to Northern Ireland? 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.
6.6
British AirwaysOverall score based on 7008 reviews
6.3Food
6.8Boarding
6.4Entertainment
6.7Comfort
7.6Crew
Airline reviews

The payment system was not working so was unable to connect wifi the entire flight

6.0 GoodDaniel, Jun 2025JFK - LHR
Read more British Airways reviews

The payment system was not working so was unable to connect wifi the entire flight

everything to do with KAYAK was terrible. Your customer facing departments are utterly useless, timewasting and unhelpful.

I ordered short ribs for main course. It tasted sweet, really sweet. Horrible.

The screen didn’t work and I didn’t get the seat upgrade I paid $300 for. They were no help with that,

Paid $180 for seat selection, and selection essnt honored. Have to call for a refund.

Was 3 hrs delayed and my poor friend I met in Barcelona was waiting at airport for 3 hrs. Dallas airport was awful

My flights were great and the crew on them was lovely especially the London to Barcelona flight as Al & AJ were so amazingly nice. I wish they would be my crew always as they have the best customer service. Sadly both flights were delayed the first one from Vegas was because they clearly loaded the cargo wrong the plane was off balance making us 2 hours late. This made me miss my connection and sadly it was challenging rebooking while I was on the flight. I will never use Kayak again as there was no customer service number or live chat and you rebooked me on a flight 2 days later. I had my mom call BA to change it which she did after spending an hour on hold. This should not be so difficult. My second flight was an hour delayed due to not being able to disconnect the bridge from the plane but I did finally make it home.

The delay was not communicated via text and the person who helped with check in also didn’t inform me about the delay. I ended up missing my connection and it was a waste of 5 hours. The crew didn’t mention there would be someone at the gate informing of if I would be rebooked and there was no signage. Overall a very poor experience. The British Airways app was also very buggy, and didn’t work. I will avoid flying with British Airways when possible.

A little better than outward journey but mild chaos at the boarding gate because some people with boarding cards from connecting flights had cards which weren't recognised

The BA business class cabin is excellent,very comfortable for sleeping but the service could be improved.

Book cheap flights from Colorado to Northern Ireland

Recent round-trip flight deals

9/30Tue
1 stopBritish Airways
13h 45mDEN-BHD
10/28Tue
1 stopBritish Airways
29h 15mBHD-DEN
$661
10/2Thu
1 stopAmerican Airlines
11h 40mDEN-BHD
10/12Sun
2 stopsAmerican Airlines
19h 38mBHD-DEN
$669
9/30Tue
2 stopsAmerican Airlines
17h 35mDEN-BHD
10/28Tue
2 stopsAmerican Airlines
19h 22mBHD-DEN
$673
10/2Thu
2 stopsAmerican Airlines
16h 40mDEN-BHD
10/12Sun
2 stopsAmerican Airlines
17h 38mBHD-DEN
$674
10/1Wed
1 stopBritish Airways
11h 55mDEN-BHD
10/6Mon
1 stopBritish Airways
13h 35mBHD-DEN
$705
10/1Wed
2 stopsAmerican Airlines
18h 18mDEN-BHD
10/6Mon
1 stopAmerican Airlines
13h 35mBHD-DEN
$737
10/1Wed
2 stopsAmerican Airlines
18h 18mDEN-BHD
10/6Mon
2 stopsAmerican Airlines
18h 10mBHD-DEN
$747
10/2Thu
1 stopBritish Airways
13h 55mDEN-BHD
10/12Sun
1 stopBritish Airways
16h 35mBHD-DEN
$788
11/21Fri
2 stops
20h 00mDEN-BHD
11/27Thu
2 stops
20h 30mBHD-DEN
$811
7/14Mon
2 stopsAer Lingus
18h 00mDEN-BHD
7/18Fri
2 stopsAer Lingus
32h 04mBHD-DEN
$1,422

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Recent one-way flight deals

8/27Wed
2 stops
42h 35mDEN-BFS
$334
8/27Wed
2 stops
33h 40mDEN-BHD
$345
8/19Tue
1 stopBritish Airways
15h 55mDEN-BHD
$379
8/19Tue
1 stopBritish Airways
15h 55mDEN-BHD
$380
8/19Tue
2 stopsAmerican Airlines
18h 15mDEN-BHD
$385
10/2Thu
1 stopBritish Airways
13h 55mDEN-BHD
$393
10/2Thu
1 stopAmerican Airlines
11h 40mDEN-BHD
$394
8/27Wed
3 stops
23h 30mDEN-BFS
$395
10/2Thu
2 stopsAmerican Airlines
16h 18mDEN-BHD
$399
8/19Tue
3 stopsAer Lingus
22h 28mDEN-BHD
$716

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Everything you need to know for your flight to Northern Ireland

Cabin class types available on flights to Colorado

Cabin classes available on flights to Colorado. Prices are the lowest found on KAYAK over the last 7 days. Price and availability is not guaranteed.
First Class flights to Northern Ireland
Business Class flights to Northern Ireland
Prem Econ Class flights to Northern Ireland
Economy Class flights to Northern Ireland

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