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$345+ Cheap flights from Colorado to Northern Ireland

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 11/9. Fares are subject to change and may not be available on all flights or dates of travel.
DEN — BFS
Nov 29 — Dec 61
Sat 11/29
Sat 12/6
1 adult, Economy
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Find flight deals from Colorado to Northern Ireland

Cheapest flights from Colorado to Northern Ireland
Explore the most affordable flight options available from Colorado to Northern Ireland. Find the lowest fares from popular airlines and budget airlines, with prices last updated on October 30, 2025.

This KLM deal was found by Cheapflights users on 10/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/1512:02 pmDEN - BHD
2 stops21h 48mKLM
Mon 11/246:30 amBHD - DEN
2 stops17h 55mKLM
Deal found 10/28$698
This Mytrip deal was found by Cheapflights users on 10/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/155:45 pmDEN - BFS
2 stops21h 55mMultiple Airlines
Mon 11/249:00 pmBFS - DEN
2 stops28h 05mMultiple Airlines
Deal found 10/28$1,150
This Mytrip deal was found by Cheapflights users on 10/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/133:40 pmDEN - BFS
2 stops24h 00mMultiple Airlines
Sat 12/205:55 pmBFS - DEN
2 stops31h 10mMultiple Airlines
Deal found 10/28$1,229
This Mytrip deal was found by Cheapflights users on 10/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/158:45 amDEN - BHD
3 stops26h 40mMultiple Airlines
Mon 11/247:20 amBHD - DEN
2 stops17h 45mMultiple Airlines
Deal found 10/28$1,510

Cheap flight deals from Colorado to Northern Ireland

Keep the following information in mind while searching for Colorado to Northern Ireland flight deals. Data was last updated October 30, 2025.

Round-trip from

$675
(oojo)

One-way from

$345
(Kiwi.com)

Popular in

December

Cheapest in

November

Average price

$667
From Colorado to Northern Ireland
Search Deals
One-way flight from Colorado to Northern Ireland
Search Deals
Highest demand for flights based on searches. 7% potential increase in price ($76 potential increase over avg. RT price).
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Cheapest flight prices on average. 8% potential price decrease ($68 potential savings vs. average RT price).
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Average for round-trip flights in October 2025
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Cheapflights Fare Finder

 
Customize your flight search to find flights from Colorado to Northern Ireland that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated October 30, 2025.
Use the filters below to find and compare flights from Colorado to Northern Ireland that are best for you.

Fly from

Colorado

Fly to

Northern Ireland

Route

Depart

Return

Price

DenverBelfast

DEN - BHD

DENBHD

Denver Intl

Wed 3/11

6:25 pm-4:35 pm

1 stop16h 10m

Belfast City

Sun 3/15

3:10 pm-4:30 pm

1 stop31h 20m

$675

DenverBelfast

DEN - BHD

DENBHD

Denver Intl

Fri 4/3

6:40 pm-3:30 pm

1 stop13h 50m

Belfast City

Tue 4/7

6:35 am-4:35 pm

1 stop17h 00m

$689

DenverBelfast

DEN - BHD

DENBHD

Denver Intl

Sat 11/15

12:02 pm-4:50 pm

2 stops21h 48m

Belfast City

Mon 11/24

6:30 am-5:25 pm

2 stops17h 55m

$698

DenverBelfast

DEN - BHD

DENBHD

Denver Intl

Fri 4/3

6:30 am-4:55 pm

2 stops27h 25m

Belfast City

Tue 4/7

6:30 am-5:37 pm

2 stops18h 07m

$782

DenverBelfast

DEN - BHD

DENBHD

Denver Intl

Fri 4/3

4:00 pm-9:20 pm

2 stops22h 20m

Belfast City

Tue 4/7

6:30 am-5:37 pm

2 stops18h 07m

$798

DenverBelfast

DEN - BHD

DENBHD

Denver Intl

Fri 4/3

4:00 pm-9:20 pm

2 stops22h 20m

Belfast City

Tue 4/7

6:30 am-6:31 pm

2 stops19h 01m

$870

DenverBelfast

DEN - BFS

DENBFS

Denver Intl

Wed 3/11

5:20 pm-10:20 pm

2 stops23h 00m

Belfast Intl

Sun 3/15

2:10 pm-3:35 pm

2 stops31h 25m

$1,092

DenverBelfast

DEN - BFS

DENBFS

Denver Intl

Sat 11/15

5:45 pm-10:40 pm

2 stops21h 55m

Belfast Intl

Mon 11/24

9:00 pm-6:05 pm

2 stops28h 05m

$1,150

DenverBelfast

DEN - BFS

DENBFS

Denver Intl

Sat 12/13

3:40 pm-10:40 pm

2 stops24h 00m

Belfast Intl

Sat 12/20

5:55 pm-6:05 pm

2 stops31h 10m

$1,229

DenverBelfast

DEN - BHD

DENBHD

Denver Intl

Sun 11/9

8:25 am-9:35 am

3 stops42h 10m

$345

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/28

Showing 1-10 of 14 results
1
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Best time to book a flight from Colorado to Northern Ireland

Have a flexible travel schedule? Discover the best time to fly to Northern Ireland from Colorado with our price prediction graph.
Estimated round-trip 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.

Cheapflights Insights

Everything you need to know about your flight from Colorado to Northern Ireland

What is the cheapest time of day to fly from CO to NIR?

Find hourly flight availability from Colorado to Northern Ireland. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated October 30, 2025.

It’s optimal to fly from Colorado to Northern Ireland in the morning. By choosing this option you can save up to 48% on the cost of your flight, compared to a flight in the evening.

Reviews of airlines servicing Northern Ireland

Get insights into the airlines that provide service to Northern Ireland. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Northern Ireland. Reviews last updated October 30, 2025.
Peruse reviews from past customers who have flown with British Airways from Colorado to Northern Ireland to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
British Airways
6.7
Okay
7,487 reviews

Food

6.3

Comfort

6.7

Entertainment

6.4

Crew

7.6

Overall

6.7

Boarding

6.9

Reviews

1 / 20
8.0
Excellent

Anonymous,Aug 2025

IAD - LHR

The plane had to load and unload passengers not through a jet way but out on the tarmac at Heathrow. The steps were steep. We weren't expecting to have to carry our luggage up and down stairs.
British Airways
6.7
Okay
7,487 reviews
British Airways
6.7
Okay
7,487 reviews

Food

6.3

Comfort

6.7

Entertainment

6.4

Crew

7.6

Overall

6.7

Boarding

6.9

Reviews

1 / 20
8.0
Excellent

Anonymous,Aug 2025

IAD - LHR

The plane had to load and unload passengers not through a jet way but out on the tarmac at Heathrow. The steps were steep. We weren't expecting to have to carry our luggage up and down stairs.

Related info for your journey

Find useful and relevant information for your journey from Colorado to Northern Ireland. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Colorado to Northern Ireland?

    There are many flights that can get you from Colorado to Northern Ireland in 16h 10m. Fly via British Airways to get the fastest option. The distance between Colorado and Northern Ireland is about 4347 mi.

  • Can I find deals for flights from Colorado to Northern Ireland that include hotel bookings?

    Yes. In addition to deals on Colorado to Northern Ireland flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Colorado to Northern Ireland?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Colorado to Northern Ireland.

  • Can I find deals for business class flights from Colorado to Northern Ireland?

    Yes. Cheapflights offers flight deals from Colorado to Northern Ireland by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

See more FAQs

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Alternative routes for Colorado to Northern Ireland

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Top airline flying from Colorado to Northern Ireland

Discover the top airline that operate flights from Colorado to Northern Ireland. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated October 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest$608Average$771FlexibilityNo cancel feeOn-time70%

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