$394 Find Cheap Flights from Colorado to Northern Ireland

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Good to know

Low seasonFebruary
High seasonMay
Cheapest flight$394
Best time to beat the crowds with an average 27% drop in price.
Most popular time to fly with an average 19% increase in price.
Flight from Denver to Belfast City 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 13h 05m, covering a distance of 4341 miles. The shortest route is Denver (DEN) to Belfast Intl Airport (BFS) with an average flight time of 13h 05m.

  • 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 6842 reviews
6.8Boarding
6.7Comfort
6.3Food
6.4Entertainment
7.6Crew
Airline reviews

The flight from Seattle was delayed, which made me miss my connection to Florence. I was re-booked NINE HOURS LATER!!! That’s basically a vacation day lost. British Airways needs to partner with other airlines when possible to get a more realistic travel time, if delays occur. I realize there aren’t many flights to Florence from London, so I would book differently were I to return. The actual flight from Seattle was very comfortable and the crew was great, no faults there. I enjoy British Airways, this was an anomaly.

6.0 GoodAnonymous, Apr 2025SEA - LHR
Read more British Airways reviews

The flight from Seattle was delayed, which made me miss my connection to Florence. I was re-booked NINE HOURS LATER!!! That’s basically a vacation day lost. British Airways needs to partner with other airlines when possible to get a more realistic travel time, if delays occur. I realize there aren’t many flights to Florence from London, so I would book differently were I to return. The actual flight from Seattle was very comfortable and the crew was great, no faults there. I enjoy British Airways, this was an anomaly.

The crew could not have been more helpful, my meal was excellent, I slept peacefully until right before landing, and the BA lounge was a godsend. The only negative I encountered was the coffee both on the plane and in the lounge. Not to my taste but that’s a personal preference.

I don’t understand why a reputable airline like BA would delegate their London flights to AA. Makes no sense to me, as most domestic carriers do such a poor job these days. Terminal 3 at LHR is a total dump

Cancelled flight minutes before boarding. Rescheduled flight was two days later

The flight attendants were EXTREMELY personable and appreciated the service, lights going off after dinner (probably the norm, but I haven’t flown evening overnight flights in a while). Thank you!

Business class seats were very dated on my plane. Very little storage, charging ports were not easily accessible, tv screen kept flopping away. Vegetarian food was disappointing: hardly any protein and severely under-seasoned. Crew was lovely.

The food was ok, but not great. They delayed boarding in Portland and did not enforce group boarding. But the crew was excellent, went above and beyond.

The food was pathetic. There wasn't much leg room and recline space for such a long flight. No tea/ coffee for a 2-3 hour connecting flight without purchasing! Really!?

Service was very good. Because I use a cane, I was allowed to use Priority Boarding. Biggest problem was extremely limited leg room in Economy class seats. For airplane food, it was alright.

Was late but that airport/storm fault. Flight was full but comfortable. Food quite nice. Unfortunate that I had a rather miserable attendant, others were much friendlier

Book cheap flights from Colorado to Northern Ireland

Recent round-trip flight deals

8/18Mon
1 stopAmerican Airlines
14h 05mDEN-BHD
8/29Fri
1 stopAmerican Airlines
16h 50mBHD-DEN
$655
8/18Mon
2 stopsAmerican Airlines
17h 45mDEN-BHD
8/29Fri
1 stopAmerican Airlines
16h 50mBHD-DEN
$660
8/18Mon
2 stopsAmerican Airlines
16h 46mDEN-BHD
8/29Fri
2 stopsAmerican Airlines
20h 47mBHD-DEN
$670
8/15Fri
1 stopBritish Airways
13h 55mDEN-BHD
8/28Thu
1 stopBritish Airways
33h 10mBHD-DEN
$725
8/17Sun
2 stopsBritish Airways
19h 12mDEN-BHD
8/30Sat
1 stopBritish Airways
13h 50mBHD-DEN
$730
8/19Tue
2 stopsKLM
17h 55mDEN-BHD
8/30Sat
2 stopsKLM
19h 19mBHD-DEN
$746
8/18Mon
2 stopsKLM
17h 55mDEN-BHD
8/30Sat
2 stopsKLM
19h 19mBHD-DEN
$818
6/3Tue
2 stops
22h 05mDEN-BFS
6/18Wed
2 stops
36h 35mBFS-DEN
$969
7/13Sun
2 stopsDelta
24h 23mDEN-BHD
7/31Thu
2 stopsDelta
23h 36mBHD-DEN
$1,046
7/13Sun
2 stopsDelta
24h 23mDEN-BHD
7/23Wed
2 stopsDelta
23h 19mBHD-DEN
$1,047

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Recent one-way flight deals

10/2Thu
1 stopAmerican Airlines
11h 40mDEN-BHD
$394
10/2Thu
2 stopsAmerican Airlines
17h 55mDEN-BHD
$398

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Last minute flights from Colorado to Northern Ireland

Last minute flight, train and bus deals

5/3Sat
multi-stopAer Lingus
17h 55mDEN-BHD
5/5Mon
multi-stopAer Lingus
18h 19mBHD-DEN
$1,031
5/3Sat
multi-stop
21h 30mDEN-BFS
5/5Mon
multi-stop
23h 44mBFS-DEN
$1,104
5/3Sat
multi-stop
14h 20mDEN-BHD
5/5Mon
multi-stop
53h 39mBHD-DEN
$1,151
5/3Sat
multi-stop
24h 45mDEN-BFS
5/5Mon
multi-stop
45h 32mBFS-DEN
$1,181
5/3Sat
multi-stopAer Lingus
13h 30mDEN-BHD
5/5Mon
multi-stopAer Lingus
16h 45mBHD-DEN
$1,195
5/3Sat
multi-stop
24h 45mDEN-BFS
5/5Mon
multi-stop
33h 25mBFS-DEN
$1,346
5/3Sat
multi-stopAer Lingus
17h 55mDEN-BHD
5/5Mon
multi-stopAer Lingus
20h 13mBHD-DEN
$1,421
5/3Sat
multi-stop
22h 00mDEN-BHD
5/5Mon
multi-stop
19h 00mBHD-DEN
$1,567
5/3Sat
multi-stop
20h 00mDEN-BFS
5/5Mon
multi-stop
14h 59mBFS-DEN
$1,724

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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.

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