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$340+ 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 8/11. Fares are subject to change and may not be available on all flights or dates of travel.
DEN — BHD
Apr 28 — May 51
Tue 4/28
Tue 5/5
1 adult, Economy
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Cheap 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 March 29, 2026.

This British Airways deal was found by Cheapflights users on 3/25. 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.
Sun 12/65:25 pm
DEN
-
BHD
1 stop13h 30m
British Airways
Tue 12/83:05 pm
BHD
-
DEN
1 stop31h 25m
British Airways
Deal found 3/25$898
This Iberia deal was found by Cheapflights users on 3/24. 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 Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/146:40 pm
DEN
-
BHD
1 stop13h 50m
Multiple Airlines
Fri 9/2511:00 am
BHD
-
DEN
2 stops17h 38m
Multiple Airlines
Deal found 3/24$908
This American Airlines deal was found by Cheapflights users on 3/24. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/142:15 pm
DEN
-
BHD
2 stops15h 40m
American Airlines
Fri 9/2511:00 am
BHD
-
DEN
2 stops17h 47m
American Airlines
Deal found 3/24$911
This Cheapflightsfares deal was found by Cheapflights users on 3/25. 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.
Mon 8/316:40 pm
DEN
-
BHD
1 stop13h 50m
British Airways
Fri 9/116:30 am
BHD
-
DEN
1 stop17h 00m
British Airways
Deal found 3/25$913
This oojo deal was found by Cheapflights users on 3/24. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/146:40 pm
DEN
-
BHD
1 stop13h 50m
British Airways
Fri 9/256:30 am
BHD
-
DEN
1 stop17h 00m
British Airways
Deal found 3/24$923
This Cheapflightsfares deal was found by Cheapflights users on 3/29. 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 8/126:40 pm
DEN
-
BHD
1 stop11h 55m
British Airways
Wed 8/266:30 am
BHD
-
DEN
1 stop17h 00m
British Airways
Deal found 3/29$927
This Trip.com deal was found by Cheapflights users on 3/27. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/238:45 am
DEN
-
BFS
2 stops31h 40m
Multiple Airlines
Thu 4/309:00 am
BFS
-
DEN
2 stops32h 33m
Multiple Airlines
Deal found 3/27$942
This Trip.com deal was found by Cheapflights users on 3/28. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/238:45 am
DEN
-
BFS
2 stops31h 40m
Multiple Airlines
Wed 4/297:00 am
BFS
-
DEN
2 stops38h 20m
Multiple Airlines
Deal found 3/28$949
This Iberia deal was found by Cheapflights users on 3/29. 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 Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/1212:39 pm
DEN
-
BHD
2 stops16h 21m
Multiple Airlines
Wed 8/266:30 am
BHD
-
DEN
1 stop17h 00m
Multiple Airlines
Deal found 3/29$953
This British Airways deal was found by Cheapflights users on 3/25. 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 8/196:40 pm
DEN
-
BHD
1 stop31h 05m
British Airways
Sun 8/236:30 am
BHD
-
DEN
1 stop17h 00m
British Airways
Deal found 3/25$959
This Mytrip deal was found by Cheapflights users on 3/26. 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 5/99:40 am
DEN
-
BFS
3 stops20h 10m
Multiple Airlines
Sat 5/168:15 pm
BFS
-
DEN
3 stops46h 05m
Multiple Airlines
Deal found 3/26$1,124
This Mytrip deal was found by Cheapflights users on 3/26. 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.
Tue 9/19:40 am
DEN
-
BFS
3 stops23h 40m
Multiple Airlines
Mon 9/146:40 am
BFS
-
DEN
2 stops19h 20m
Multiple Airlines
Deal found 3/26$1,152

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 March 29, 2026.

Round-trip from

$908
(Iberia)

One-way from

$340
(Kiwi.com)
From Denver Intl to Belfast
Search Deals
One-way flight from Denver Intl to Belfast
Search Deals

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 March 29, 2026.
Use the filters below to find and compare flights from Denver to Belfast that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

DenverBelfast

DEN - BHD

DENBHD

Denver Intl

Mon 9/14

2:15 pm-12:55 pm

2 stops15h 40m

Belfast City

Fri 9/25

11:00 am-9:47 pm

2 stops17h 47m

$911
Quickest round-trip

DenverBelfast

DEN - BHD

DENBHD

Denver Intl

Mon 8/31

6:40 pm-3:30 pm

1 stop13h 50m

Belfast City

Fri 9/11

9:35 am-4:30 pm

1 stop13h 55m

$913

DenverBelfast

DEN - BHD

DENBHD

Denver Intl

Mon 8/31

6:40 pm-5:30 pm

1 stop15h 50m

Belfast City

Fri 9/11

6:30 am-6:27 pm

2 stops18h 57m

$913

DenverBelfast

DEN - BHD

DENBHD

Denver Intl

Wed 8/19

6:40 pm-8:45 am

1 stop31h 05m

Belfast City

Sun 8/23

6:30 am-4:30 pm

1 stop17h 00m

$959

DenverBelfast

DEN - BFS

DENBFS

Denver Intl

Sat 5/9

9:40 am-12:50 pm

3 stops20h 10m

Belfast Intl

Sat 5/16

8:15 pm-11:20 am

3 stops46h 05m

$1,124

DenverBelfast

DEN - BFS

DENBFS

Denver Intl

Tue 5/12

11:25 am-9:20 pm

3 stops26h 55m

Belfast Intl

Tue 5/19

8:15 pm-11:20 am

3 stops46h 05m

$1,169

DenverBelfast

DEN - BFS

DENBFS

Denver Intl

Wed 8/12

11:30 am-7:15 pm

2 stops24h 45m

Belfast Intl

Wed 8/26

8:15 am-12:40 pm

2 stops35h 25m

$1,185

DenverBelfast

DEN - BFS

DENBFS

Denver Intl

Thu 4/23

11:10 am-9:40 pm

3 stops27h 30m

Belfast Intl

Wed 4/29

5:55 am-7:00 pm

2 stops20h 05m

$1,293

DenverBelfast

DEN - BFS

DENBFS

Denver Intl

Wed 5/13

4:05 pm-10:20 pm

2 stops23h 15m

Belfast Intl

Sun 5/24

10:00 pm-2:20 pm

2 stops23h 20m

$1,304
Cheapest one-way

DenverBelfast

DEN - BFS

DENBFS

Denver Intl

Tue 8/11

4:40 pm-3:15 pm

2 stops15h 35m

$340

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/29

Showing 1-10 of 20 resultsSorted by cheapest first
1
2

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
No data available for this route at this time. Please check back soon.

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 March 29, 2026.
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
7,829 reviews

Entertainment

6.4

Food

6.4

Crew

7.6

Overall

6.7

Boarding

6.9

Comfort

6.8

Reviews

1 / 20
10.0
Excellent

Viorica,Mar 2026

PHX - LHR

The food lately is just from poor to very poor. I bealeave that you can serve less quantities for more quality food. Exemple : at breakfast : omlete and vegetarian omlete ....I beleave with less work less personel could be provide some hummus and carrots and some boiled egss plus whatever snacks or drinks you wish....... Thank you in advance
British Airways
6.7
Okay
7,829 reviews
British Airways
6.7
Okay
7,829 reviews

Entertainment

6.4

Food

6.4

Crew

7.6

Overall

6.7

Boarding

6.9

Comfort

6.8

Reviews

1 / 20
10.0
Excellent

Viorica,Mar 2026

PHX - LHR

The food lately is just from poor to very poor. I bealeave that you can serve less quantities for more quality food. Exemple : at breakfast : omlete and vegetarian omlete ....I beleave with less work less personel could be provide some hummus and carrots and some boiled egss plus whatever snacks or drinks you wish....... Thank you in advance

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 15h 40m. Fly via American Airlines or British Airways to get the fastest option. The distance between Denver and Belfast is about 4347 mi. Both multi-stop and nonstop flights can be found to your destination and back.

  • 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 $679.

  • 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

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 March 29, 2026.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest$679Average$995FlexibilityNo cancel feeOn-time70%

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