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$649+ Cheap flights from Denver (DEN) to Belfast

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 2/18. Fares are subject to change and may not be available on all flights or dates of travel.
DEN — BHD
Jan 17 — Jan 241
Sat 1/17
Sat 1/24
1 adult, Economy
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Cheap flight deals from Denver to Belfast

Best flights from Denver to Belfast
Discover carefully curated flight deals from Denver to Belfast that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated December 18, 2025.

This Cheapflightsfares deal was found by Cheapflights users on 12/16. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/185:25 pmDEN - BHD
1 stop16h 10mBritish Airways
Fri 2/276:45 amBHD - DEN
1 stop15h 45mBritish Airways
Deal found 12/16$649
This Cheapflightsfares deal was found by Cheapflights users on 12/16. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/166:40 pmDEN - BHD
1 stop13h 50mBritish Airways
Tue 4/219:35 amBHD - DEN
1 stop13h 55mBritish Airways
Deal found 12/16$664
This British Airways deal was found by Cheapflights users on 12/16. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 3/55:25 pmDEN - BHD
1 stop16h 15mBritish Airways
Sun 3/812:10 pmBHD - DEN
1 stop34h 20mBritish Airways
Deal found 12/16$673
This British Airways deal was found by Cheapflights users on 12/17. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/205:25 pmDEN - BHD
1 stop13h 50mBritish Airways
Tue 2/243:05 pmBHD - DEN
1 stop31h 25mBritish Airways
Deal found 12/17$673
This British Airways deal was found by Cheapflights users on 12/15. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/115:25 pmDEN - BHD
1 stop16h 10mBritish Airways
Sun 2/159:10 amBHD - DEN
1 stop13h 20mBritish Airways
Deal found 12/15$674

Find 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 December 18, 2025.

Round-trip from

$649
(Cheapflightsfares)

Popular in

March

Cheapest in

February

Average price

$1,153
From Denver Intl to Belfast
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High demand for flights, 6% potential price rise
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Cheapest flight prices on average. 4% potential price decrease ($38 potential savings vs. average RT price).
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Average for round-trip flights in December 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 December 18, 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 2/18

5:25 pm-4:35 pm

1 stop16h 10m

Belfast City

Fri 2/27

6:45 am-3:30 pm

1 stop15h 45m

$649

DenverBelfast

DEN - BHD

DENBHD

Denver Intl

Thu 4/16

6:40 pm-3:30 pm

1 stop13h 50m

Belfast City

Tue 4/21

9:35 am-4:30 pm

1 stop13h 55m

$664

DenverBelfast

DEN - BHD

DENBHD

Denver Intl

Thu 3/5

5:25 pm-4:40 pm

1 stop16h 15m

Belfast City

Sun 3/8

12:10 pm-4:30 pm

1 stop34h 20m

$673

DenverBelfast

DEN - BHD

DENBHD

Denver Intl

Fri 2/20

5:25 pm-2:15 pm

1 stop13h 50m

Belfast City

Tue 2/24

3:05 pm-3:30 pm

1 stop31h 25m

$673

DenverBelfast

DEN - BHD

DENBHD

Denver Intl

Wed 2/11

5:25 pm-4:35 pm

1 stop16h 10m

Belfast City

Sun 2/15

9:10 am-3:30 pm

1 stop13h 20m

$674

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/16

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 December 18, 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 December 18, 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
7,585 reviews

Entertainment

6.4

Food

6.4

Boarding

6.9

Comfort

6.7

Crew

7.6

Overall

6.7

Reviews

1 / 20
8.0
Excellent

Lakshmi,Dec 2025

SFO - LHR

I had a great time on the flight with good entertainment and food. The staff was awesome. The only thing was there was a delay in boarding and takeoff from London. However, I was pleasantly surprised when the airline sent an apology for the few later landing in Mumbai. They did not have WiFi on board on the leg from London to Mumbai but that was okay for me. On the first leg from SF to London, a couple of seats ahead of me had issues with their display so they could not watch anything on their screens although the stewardess gas be them an option to use the WiFi on their devices. This did not affect me, however, so that was cool. I would recommend British Airways. This was my first time flying with them and I had a lovely flight.
British Airways
6.7
Okay
7,585 reviews
British Airways
6.7
Okay
7,585 reviews

Entertainment

6.4

Food

6.4

Boarding

6.9

Comfort

6.7

Crew

7.6

Overall

6.7

Reviews

1 / 20
8.0
Excellent

Lakshmi,Dec 2025

SFO - LHR

I had a great time on the flight with good entertainment and food. The staff was awesome. The only thing was there was a delay in boarding and takeoff from London. However, I was pleasantly surprised when the airline sent an apology for the few later landing in Mumbai. They did not have WiFi on board on the leg from London to Mumbai but that was okay for me. On the first leg from SF to London, a couple of seats ahead of me had issues with their display so they could not watch anything on their screens although the stewardess gas be them an option to use the WiFi on their devices. This did not affect me, however, so that was cool. I would recommend British Airways. This was my first time flying with them and I had a lovely flight.

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 33% 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

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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 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 December 18, 2025.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest$608Average$771FlexibilityNo cancel feeOn-time70%

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