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$3,768+ Cheap flights from Northern Ireland to Denver (DEN)

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 7/13. Fares are subject to change and may not be available on all flights or dates of travel.
BFS — DEN
Jul 7 — Jul 141
Mon 7/7
Mon 7/14
1 adult, Economy
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Find flight deals from Northern Ireland to Denver

One-way flights from Northern Ireland to Denver
Search for one-way flight options from Northern Ireland to Denver. Find affordable one-way fares based on user searches. Data last updated July 2, 2025.

This FlightHub deal was found by Cheapflights users on 7/2. 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.
Sun 7/136:00 pmBHD - DEN
2 stops30h 59mAer Lingus
Deal found 7/2$3,768
This Thrive Travel deal was found by Cheapflights users on 7/2. 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 Thrive Travel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 7/136:50 amBHD - DEN
1 stop16h 35mBritish Airways
Deal found 7/2$6,629
This AranGrant deal was found by Cheapflights users on 7/1. 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 AranGrant is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 7/133:15 pmBHD - DEN
3 stops32h 12mMultiple Airlines
Deal found 7/1$11,574

Cheapflights Fare Finder

Customize your flight search to find flights from Northern Ireland to Denver 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 July 2, 2025.
Use the filters below to find and compare flights from Northern Ireland to Denver that are best for you.

Fly from

Northern Ireland

Fly to

Denver

Route

Depart

Return

Price

BelfastDenver

BHD - DEN

BHDDEN

Belfast City

Sun 7/13

6:00 pm-5:59 pm

2 stops30h 59m

$3,768

BelfastDenver

BHD - DEN

BHDDEN

Belfast City

Sun 7/13

6:50 am-4:25 pm

1 stop16h 35m

$6,629

BelfastDenver

BHD - DEN

BHDDEN

Belfast City

Sun 7/13

3:15 pm-4:27 pm

3 stops32h 12m

$11,574

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/2

Best time to book a flight from Northern Ireland to Denver

Have a flexible travel schedule? Discover the best time to fly to Denver from Northern Ireland 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 Northern Ireland to Denver
No data available for this route at this time. Please check back soon.

Reviews of airlines servicing Denver

Get insights into the airlines that provide service to Denver. 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 Denver. Reviews last updated July 2, 2025.
Peruse reviews from past customers who have flown with Aer Lingus and British Airways from Northern Ireland to Denver to help guide your decision. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Aer Lingus
7.1
Good
1,141 reviews

Food

6.4

Boarding

7.2

Comfort

7.0

Entertainment

6.8

Overall

7.1

Crew

8.0

Reviews

1 / 20
6.0
Good

Tim Hunter,May 2025

LHR - DUB

In the economy section one of the bathrooms was reserved for first class which made for very long lines in for the bathrooms. The temperature for the flight was very cold. I ended up catching a mild cold on the way home. No blankets were handed out / offered. The food service was OK but no napkins were given with the meals -- very weird. The crew as OK but definitely not nice and welcoming.
Aer Lingus
7.1
Good
1,141 reviews
Aer Lingus
7.1
Good
1,141 reviews

Food

6.4

Boarding

7.2

Comfort

7.0

Entertainment

6.8

Overall

7.1

Crew

8.0

Reviews

1 / 20
6.0
Good

Tim Hunter,May 2025

LHR - DUB

In the economy section one of the bathrooms was reserved for first class which made for very long lines in for the bathrooms. The temperature for the flight was very cold. I ended up catching a mild cold on the way home. No blankets were handed out / offered. The food service was OK but no napkins were given with the meals -- very weird. The crew as OK but definitely not nice and welcoming.
British Airways
6.6
Okay
7,089 reviews
Aer Lingus
7.1
Good
1,141 reviews

Food

6.4

Boarding

7.2

Comfort

7.0

Entertainment

6.8

Overall

7.1

Crew

8.0

Reviews

1 / 20
6.0
Good

Tim Hunter,May 2025

LHR - DUB

In the economy section one of the bathrooms was reserved for first class which made for very long lines in for the bathrooms. The temperature for the flight was very cold. I ended up catching a mild cold on the way home. No blankets were handed out / offered. The food service was OK but no napkins were given with the meals -- very weird. The crew as OK but definitely not nice and welcoming.

Related info for your journey

Find useful and relevant information for your journey from Northern Ireland to Denver. 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 into for flights to Denver from Northern Ireland?

    If you book a flight to Denver from Northern Ireland, you will be flying to Denver Intl, which is the city’s only airport. Denver Intl (DEN) is located 18.5 mi from the center of Denver.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Northern Ireland to Denver 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 Northern Ireland to Denver?

    Currently, October is the cheapest month in which you can book a flight from Northern Ireland to Denver (average of $197). Flying from Northern Ireland to Denver in March is currently the most expensive (average of $278). 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.

See more FAQs

Traveling to a place near Northern Ireland?

Book flights to Northern Ireland if you plan to visit one of these locations
Westminster
Black Hawk
Winter Park
Lakewood
Cripple Creek
Golden
Brighton
Silverthorne
Thornton
Frisco
Broomfield
Grand Lake
Manitou Springs
Central City
Fort Morgan
Glendale
Copper Mountain
Wheat Ridge
Longmont
Idaho Springs

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