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Cheap flights from Colorado to Belfast from $365

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Colorado to Belfast departing on 9/7. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 0 bags

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Colorado to Belfast

Cheap round-trip flights

Enter your travel dates to find the best prices.
British Airways Logo
5:01 pm - 1:55 pmDEN  Denver Intl-BHD Belfast City
13h 54m1 stop London Heathrow
British Airways Logo
5:40 pm - 3:10 pmBHD  Belfast City-DEN Denver Intl
28h 30m1 stop London Heathrow
$950British Airways
Sun, Nov 15 - Wed, Nov 18
British Airways Logo
5:01 pm - 1:55 pmDEN  Denver Intl-BHD Belfast City
13h 54m1 stop London Heathrow
British Airways Logo
6:35 am - 3:10 pmBHD  Belfast City-DEN Denver Intl
15h 35m1 stop London Heathrow
$950British Airways
Sun, Nov 15 - Wed, Nov 18
British Airways Logo
5:01 pm - 1:55 pmDEN  Denver Intl-BHD Belfast City
13h 54m1 stop London Heathrow
British Airways Logo
9:15 am - 3:10 pmBHD  Belfast City-DEN Denver Intl
12h 55m1 stop London Heathrow
$959British Airways
Sun, Jan 31 - Wed, Feb 3
Multiple Airlines Logo
4:40 pm - 6:00 pmDEN  Denver Intl-BFS Belfast Intl
19h 20m2 stops Reykjavik Keflavik Intl London Gatwick
Multiple Airlines Logo
8:50 pm - 8:27 pmBFS  Belfast Intl-DEN Denver Intl
30h 37m3 stops London Gatwick Zurich Montreal Pierre Elliott Trudeau Intl
$972Multiple Airlines
Wed, Oct 28 - Mon, Nov 2
British Airways Logo
6:01 pm - 2:35 pmDEN  Denver Intl-BHD Belfast City
14h 34m1 stop London Heathrow
British Airways Logo
7:25 pm - 3:10 pmBHD  Belfast City-DEN Denver Intl
26h 45m1 stop London Heathrow
$980British Airways
Wed, Oct 28 - Mon, Nov 2
British Airways Logo
6:09 pm - 2:35 pmDEN  Denver Intl-BHD Belfast City
14h 26m2 stops Chicago O'Hare Intl London Heathrow
British Airways Logo
7:25 pm - 3:10 pmBHD  Belfast City-DEN Denver Intl
26h 45m1 stop London Heathrow
$984British Airways
Wed, Oct 28 - Mon, Nov 2
Multiple Airlines Logo
4:40 pm - 7:45 pmDEN  Denver Intl-BFS Belfast Intl
21h 05m3 stops Reykjavik Keflavik Intl Dublin Manchester
Multiple Airlines Logo
8:50 pm - 8:27 pmBFS  Belfast Intl-DEN Denver Intl
30h 37m3 stops London Gatwick Zurich Montreal Pierre Elliott Trudeau Intl
$995Multiple Airlines
Wed, Oct 28 - Mon, Nov 2
Multiple Airlines Logo
4:40 pm - 5:15 pmDEN  Denver Intl-BFS Belfast Intl
18h 35m2 stops Reykjavik Keflavik Intl Edinburgh Turnhouse
Multiple Airlines Logo
10:05 pm - 2:30 pmBFS  Belfast Intl-DEN Denver Intl
23h 25m2 stops Manchester Munich Franz Josef Strauss
$1,047Multiple Airlines
Wed, Oct 28 - Mon, Nov 2
KLM Logo
11:05 am - 9:20 amDEN  Denver Intl-BHD Belfast City
15h 15m2 stops Minneapolis St Paul Amsterdam Schiphol
KLM Logo
5:30 pm - 3:24 pmBHD  Belfast City-DEN Denver Intl
28h 54m2 stops Amsterdam Schiphol Minneapolis St Paul
$1,073KLM
Mon, Sep 7 - Mon, Sep 14
Delta Logo
6:35 am - 9:20 amDEN  Denver Intl-BHD Belfast City
19h 45m2 stops New York John F Kennedy Intl Amsterdam Schiphol
Delta Logo
5:30 pm - 3:24 pmBHD  Belfast City-DEN Denver Intl
28h 54m2 stops Amsterdam Schiphol Minneapolis St Paul
$1,073Delta
Tue, Sep 8 - Mon, Sep 14

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American Airlines flights from Colorado to Belfast

Our best American Airlines deals on Colorado to Belfast flight tickets
American Airlines
Aug 31
DEN12:23 pmDenver Intl
17h 32m
2 stops
BHD12:55 pmBelfast City
Sep 11
BHD6:30 amBelfast City
17h 27m
2 stops
DEN4:57 pmDenver Intl
$1,089
American Airlines
Aug 31
DEN2:21 pmDenver Intl
18h 09m
2 stops
BHD3:30 pmBelfast City
Sep 11
BHD6:30 amBelfast City
18h 12m
2 stops
DEN5:42 pmDenver Intl
$1,090
American Airlines
Oct 17
DEN2:29 pmDenver Intl
17h 36m
2 stops
BHD3:05 pmBelfast City
Oct 24
BHD9:35 amBelfast City
17h 47m
2 stops
DEN8:22 pmDenver Intl
$1,123

British Airways flights from Colorado to Belfast

Our best British Airways deals on Colorado to Belfast flight tickets
British Airways
Nov 15
DEN5:01 pmDenver Intl
13h 54m
1 stop
BHD1:55 pmBelfast City
Nov 18
BHD6:35 amBelfast City
15h 35m
1 stop
DEN3:10 pmDenver Intl
$950
British Airways
Jan 31
DEN5:01 pmDenver Intl
13h 54m
1 stop
BHD1:55 pmBelfast City
Feb 3
BHD9:15 amBelfast City
12h 55m
1 stop
DEN3:10 pmDenver Intl
$959
British Airways
Oct 28
DEN6:01 pmDenver Intl
14h 34m
1 stop
BHD2:35 pmBelfast City
Nov 2
BHD7:25 pmBelfast City
26h 45m
1 stop
DEN3:10 pmDenver Intl
$980

momondo Fare Finder

 
Customize your flight search to find flights from Colorado 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, momondo users made 832,500 searches. Data last updated August 10, 2026.
Use the filters below to find and compare flights from Colorado to Belfast that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

DenverBelfast

DEN Denver Intl - BHD Belfast City

DENBHD

Denver Intl

Sun 11/15

5:01 pm-1:55 pm

1 stop13h 54m

Belfast City

Wed 11/18

5:40 pm-3:10 pm

1 stop28h 30m

$950

DenverBelfast

DEN Denver Intl - BHD Belfast City

DENBHD

Denver Intl

Sun 11/15

5:01 pm-1:55 pm

1 stop13h 54m

Belfast City

Wed 11/18

6:35 am-3:10 pm

1 stop15h 35m

$950
Quickest round-trip

DenverBelfast

DEN Denver Intl - BHD Belfast City

DENBHD

Denver Intl

Sun 1/31

5:01 pm-1:55 pm

1 stop13h 54m

Belfast City

Wed 2/3

9:15 am-3:10 pm

1 stop12h 55m

$959

DenverBelfast

DEN Denver Intl - BFS Belfast Intl

DENBFS

Denver Intl

Wed 10/28

4:40 pm-6:00 pm

2 stops19h 20m

Belfast Intl

Mon 11/2

8:50 pm-8:27 pm

3 stops30h 37m

$972

DenverBelfast

DEN Denver Intl - BHD Belfast City

DENBHD

Denver Intl

Wed 10/28

6:01 pm-2:35 pm

1 stop14h 34m

Belfast City

Mon 11/2

7:25 pm-3:10 pm

1 stop26h 45m

$980

DenverBelfast

DEN Denver Intl - BHD Belfast City

DENBHD

Denver Intl

Wed 10/28

6:09 pm-2:35 pm

2 stops14h 26m

Belfast City

Mon 11/2

7:25 pm-3:10 pm

1 stop26h 45m

$984

DenverBelfast

DEN Denver Intl - BFS Belfast Intl

DENBFS

Denver Intl

Wed 10/28

4:40 pm-7:45 pm

3 stops21h 05m

Belfast Intl

Mon 11/2

8:50 pm-8:27 pm

3 stops30h 37m

$995

DenverBelfast

DEN Denver Intl - BFS Belfast Intl

DENBFS

Denver Intl

Wed 10/28

4:40 pm-5:15 pm

2 stops18h 35m

Belfast Intl

Mon 11/2

10:05 pm-2:30 pm

2 stops23h 25m

$1,047

DenverBelfast

DEN Denver Intl - BHD Belfast City

DENBHD

Denver Intl

Mon 9/7

11:05 am-9:20 am

2 stops15h 15m

Belfast City

Mon 9/14

5:30 pm-3:24 pm

2 stops28h 54m

$1,073

DenverBelfast

DEN Denver Intl - BHD Belfast City

DENBHD

Denver Intl

Tue 9/8

6:35 am-9:20 am

2 stops19h 45m

Belfast City

Mon 9/14

5:30 pm-3:24 pm

2 stops28h 54m

$1,073

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 17 resultsSorted by cheapest first
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See travel insights to Belfast from

How to get the cheapest flight ticket from Colorado to Belfast

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest airline that flies from Colorado to Belfast?

Delta is the most popular carrier operating from Colorado to Belfast

Cheap Colorado to Belfast flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Colorado to Belfast

Fastest flight time

13h 50m

Direct flights

None
The fastest flight from Colorado to Belfast takes 13h 50m
There are no direct flights from Colorado to Belfast. There are no popular flight routes from Colorado to Belfast.
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Frequently asked questions about flying from Colorado to Belfast

  • When did momondo last update prices for flights from Colorado to Belfast?

    Prices for flights from Colorado to Belfast are updated daily.

  • How many operators does momondo search for flights from Colorado to Belfast?

  • How old do you have to be to fly from Colorado to Belfast?

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Colorado to Belfast.

  • What documentation or ID do you need to fly to Belfast?

    The travel and health documents you'll need for your trip to Belfast may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Belfast. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

Best airlines flying from Colorado to Belfast

Compare and see reviews for airlines that fly from Colorado to Belfast with momondo
Airline
Rating
Free Cancellation
Price
British AirwaysPriceFrom $645Free CancellationRating
6.7
8,153 reviews
Search British Airways flights

Why use momondo?

Why should I use momondo to find a flight deal from Colorado to Belfast?

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from Colorado to Belfast for you.

Can I find flights from Colorado to Belfast with flexible booking policies on momondo?

Yes. momondo enables you to select and highlight flights to Belfast from Colorado with this policy.

How can momondo help me find flights from Colorado to Belfast?

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Belfast from Colorado.

I’m not ready to book a flight from Colorado to Belfast right now. Can momondo alert me if prices change?

Yes. momondo can track prices for Colorado to Belfast flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.

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Find better results for your trip to the United Kingdom

Fly into one of these airports located in Belfast

Airports listed have a maximum distance of 12.2 mi from Belfast
Belfast Intl Airport
Belfast City Airport