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$350+ Cheap flights from Denver (DEN) 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 9/26. Fares are subject to change and may not be available on all flights or dates of travel.
DEN — BFS
Oct 17 — Oct 241
Fri 10/17
Fri 10/24
1 adult, Economy
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Cheap flight deals from Denver to Northern Ireland

Keep the following information in mind while searching for Denver to Northern Ireland flight deals. Data was last updated September 17, 2025.

Round-trip from

$949
(Delta)

One-way from

$350
(Kiwi.com)

Popular in

December

Cheapest in

November

Average price

$722
From Denver Intl to Northern Ireland
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One-way flight from Denver Intl to Northern Ireland
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Highest demand for flights based on searches. 7% potential increase in price ($74 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 September 2025
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Find flight deals from Denver to Northern Ireland

Cheapest flights from Denver to Northern Ireland
Explore the most affordable flight options available from Denver to Northern Ireland. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 17, 2025.

This Delta deal was found by Cheapflights users on 9/16. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/212:05 pmDEN - BHD
2 stops21h 50mDelta
Sun 10/126:30 amBHD - DEN
2 stops22h 11mDelta
Deal found 9/16$949
This Cheapflightsfares deal was found by Cheapflights users on 9/15. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/27:55 pmDEN - BHD
2 stops17h 00mAer Lingus
Sun 10/127:00 amBHD - DEN
2 stops17h 59mAer Lingus
Deal found 9/15$962
This Ovago deal was found by Cheapflights users on 9/15. 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 Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/26:35 pmDEN - BHD
1 stop31h 15mBritish Airways
Sun 10/126:50 amBHD - DEN
1 stop16h 35mBritish Airways
Deal found 9/15$1,007
This Mytrip deal was found by Cheapflights users on 9/15. 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.
Fri 10/315:20 pmDEN - BFS
2 stops22h 40mMultiple Airlines
Fri 11/73:05 pmBFS - DEN
2 stops31h 55mMultiple Airlines
Deal found 9/15$1,068
This Finnair deal was found by Cheapflights users on 9/17. 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 Finnair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/222:45 pmDEN - BHD
2 stops16h 30mMultiple Airlines
Sat 1/311:35 amBHD - DEN
2 stops19h 19mMultiple Airlines
Deal found 9/17$1,531
This FlightHub deal was found by Cheapflights users on 9/17. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/224:55 pmDEN - BHD
2 stops20h 20mBritish Airways
Sat 1/36:35 amBHD - DEN
1 stop15h 55mBritish Airways
Deal found 9/17$1,618

Cheapflights Fare Finder

 
Customize your flight search to find flights from Denver 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 September 17, 2025.
Use the filters below to find and compare flights from Denver to Northern Ireland that are best for you.

Fly from

Denver

Fly to

Northern Ireland

Route

Depart

Return

Price

DenverBelfast

DEN - BHD

DENBHD

Denver Intl

Thu 10/2

12:05 pm-4:55 pm

2 stops21h 50m

Belfast City

Sun 10/12

6:30 am-9:41 pm

2 stops22h 11m

$949

DenverBelfast

DEN - BHD

DENBHD

Denver Intl

Thu 10/2

7:55 pm-7:55 pm

2 stops17h 00m

Belfast City

Sun 10/12

7:00 am-5:59 pm

2 stops17h 59m

$962

DenverBelfast

DEN - BHD

DENBHD

Denver Intl

Thu 10/2

6:35 pm-8:50 am

1 stop31h 15m

Belfast City

Sun 10/12

6:50 am-4:25 pm

1 stop16h 35m

$1,007

DenverBelfast

DEN - BFS

DENBFS

Denver Intl

Fri 10/31

5:20 pm-10:00 pm

2 stops22h 40m

Belfast Intl

Fri 11/7

3:05 pm-4:00 pm

2 stops31h 55m

$1,068

DenverBelfast

DEN - BHD

DENBHD

Denver Intl

Mon 12/22

2:45 pm-2:15 pm

2 stops16h 30m

Belfast City

Sat 1/3

11:35 am-11:54 pm

2 stops19h 19m

$1,531

DenverBelfast

DEN - BHD

DENBHD

Denver Intl

Mon 12/22

4:55 pm-8:15 pm

2 stops20h 20m

Belfast City

Sat 1/3

6:35 am-3:30 pm

1 stop15h 55m

$1,618

DenverBelfast

DEN - BFS

DENBFS

Denver Intl

Fri 9/26

11:59 pm-9:25 am

3 stops26h 26m

$350

DenverBelfast

DEN - BHD

DENBHD

Denver Intl

Fri 9/26

11:59 pm-8:10 am

3 stops49h 11m

$359

DenverBelfast

DEN - BHD

DENBHD

Denver Intl

Fri 9/26

12:41 pm-8:45 pm

2 stops25h 04m

$406

DenverBelfast

DEN - BHD

DENBHD

Denver Intl

Thu 10/2

2:00 pm-4:55 pm

2 stops19h 55m

$448

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/16

Showing 1-10 of 12 results
1
2

Best time to book a flight from Denver to Northern Ireland

Have a flexible travel schedule? Discover the best time to fly to Northern Ireland from Denver 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 Denver to Northern Ireland

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

Find hourly flight availability from Denver 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 September 17, 2025.

When flying from Denver to Northern Ireland, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

How much does it cost to fly round-trip from Denver to Northern Ireland?

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 September 17, 2025.
See what other customers who have flown with British Airways from Denver to Northern Ireland have to say. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
British Airways
6.7
Okay
7,367 reviews

Comfort

6.7

Crew

7.6

Food

6.3

Overall

6.7

Entertainment

6.4

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
7,367 reviews
British Airways
6.7
Okay
7,367 reviews

Comfort

6.7

Crew

7.6

Food

6.3

Overall

6.7

Entertainment

6.4

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 Denver to Northern Ireland. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly from for flights from Denver to Northern Ireland?

    For a flight from Denver to Northern Ireland, you will be flying from Denver Intl. Denver Intl (DEN) is just 18.5 mi from the center of the city.

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

    Airlines like Delta and Aer Lingus fly from Denver to Northern Ireland in about 17h. The time it takes to get you to your destination can typically vary by up to 4h 50m. Airlines will cover a distance of 4347 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Denver 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.

  • What is the cheapest month to book a flight from Denver to Northern Ireland?

    Currently, February is the cheapest month in which you can book a flight from Denver to Northern Ireland (average of $657). Flying from Denver to Northern Ireland in June is currently the most expensive (average of $1,189). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

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Alternative routes for Denver to Northern Ireland

See prices for flight routes from nearby airports that may be better suited for you.
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Top airline flying from Denver to Northern Ireland

Discover the top airline that operate flights from Denver 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 September 17, 2025.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest$608Average$776FlexibilityNo cancel feeOn-time70%

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