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$345+ Cheap flights from Denver (DEN) to Belfast

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 — BHD
Nov 29 — Dec 61
Sat 11/29
Sat 12/6
1 adult, Economy
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Find flight deals from Denver to Belfast

Cheapest flights from Denver to Belfast
Explore the most affordable flight options available from Denver to Belfast. 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 Denver to Belfast

Discover tips and strategies to find the most affordable flight options for your journey from Denver (DEN) to Belfast (BF1). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data 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 Denver Intl to Belfast
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One-way flight from Denver Intl to Belfast
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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 Denver to Belfast 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 Denver to Belfast that are best for you.

Fly from

Denver

Fly to

Belfast

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 Denver to Belfast

Have a flexible travel schedule? Discover the best time to fly to Belfast 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 Belfast

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

Find hourly flight availability from Denver to Belfast. 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 Denver to Belfast in the morning. By choosing this option you can save up to 54% on the cost of your flight, compared to a flight in the evening.

Reviews of airlines servicing Belfast

Get insights into the airlines that provide service to Belfast. 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 Belfast. Reviews last updated October 30, 2025.
Read through reviews of airlines operating flights from Denver to Belfast, such as British Airways. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
British Airways
6.7
Okay
7,487 reviews

Overall

6.7

Boarding

6.9

Entertainment

6.4

Crew

7.6

Comfort

6.7

Food

6.3

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

Overall

6.7

Boarding

6.9

Entertainment

6.4

Crew

7.6

Comfort

6.7

Food

6.3

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 Belfast. 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 Belfast?

    If you book a flight to Belfast from Denver, you will be flying from Denver Intl, which is the city’s only airport. Denver Intl (DEN) is located 18.5 mi from the center of Denver. There are 0 flights from Denver Intl to Belfast per day from 1 airline.

  • How long is the flight from Denver to Belfast?

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

  • What is the cheapest airline to fly from Denver to Belfast round-trip?

    Cheapflights users have booked flights from Denver to Belfast round-trip from $608. Users have found that British Airways is 30% cheaper than the other options available to this destination.

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

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

  • How can I find direct flights from Denver to Belfast?

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

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

    Yes. Cheapflights offers flight deals from Denver to Belfast 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

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Denver to Belfast

See prices for flight routes from nearby airports that may be better suited for you.
Denver to Belfast Intl flights
Denver to Belfast City flights

Top airline flying from Denver to Belfast

Discover the top airline that operate flights from Denver to Belfast. 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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