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

British Airways, Delta, and KLM are the most popular carriers operating 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?

There is 1 operator available for flights from Colorado to Belfast as of September 2025.

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.

$381 Cheap Flights from Colorado to Belfast in 2025/26

1 adult

0 bags

Discover deals from 900+ travel sites with momondo.

Save money when you book flights with momondo

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize your results.

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Not ready to book? to track prices.

Search flight deals

Find the cheapest flights from Colorado to Belfast

Round-trip

One-way

Cheap round-trip flights

6:25 pm - 2:50 pmDEN-BHD

14h 25m1 stop

8:25 pm - 4:30 pmBHD-DEN

26h 05m1 stop

$681British Airways

Find Deal

Tue, Mar 17 - Sun, Mar 22

12:36 pm - 10:30 amDEN-BHD

15h 54m2 stops

8:25 pm - 4:30 pmBHD-DEN

26h 05m1 stop

$685British Airways

Find Deal

Tue, Mar 17 - Sun, Mar 22

3:40 pm - 10:20 pmDEN-BFS

23h 40m2 stops

6:30 am - 6:05 pmBFS-DEN

18h 35m2 stops

$695Multiple Airlines

Find Deal

Wed, Nov 5 - Wed, Nov 12

2:00 pm - 9:15 pmDEN-BHD

24h 15m2 stops

6:30 am - 11:14 pmBHD-DEN

23h 44m2 stops

$812Delta

Find Deal

Thu, Oct 2 - Sun, Oct 12

12:55 pm - 11:30 amDEN-BHD

16h 35m2 stops

8:25 pm - 9:51 pmBHD-DEN

31h 26m2 stops

$882Multiple Airlines

Find Deal

Tue, Mar 17 - Sun, Mar 22

2:00 pm - 9:15 pmDEN-BHD

24h 15m2 stops

6:30 am - 3:42 pmBHD-DEN

16h 12m2 stops

$900Delta

Find Deal

Thu, Oct 2 - Sun, Oct 12

6:35 pm - 8:50 amDEN-BHD

31h 15m1 stop

6:50 am - 5:54 pmBHD-DEN

18h 04m2 stops

$1,039British Airways

Find Deal

Thu, Oct 2 - Sun, Oct 12

6:35 pm - 8:50 amDEN-BHD

31h 15m1 stop

6:50 am - 4:25 pmBHD-DEN

16h 35m1 stop

$1,104British Airways

Find Deal

Thu, Oct 2 - Sun, Oct 12

6:35 pm - 8:50 amDEN-BHD

31h 15m1 stop

6:50 am - 7:26 pmBHD-DEN

19h 36m2 stops

$1,120British Airways

Find Deal

Thu, Oct 2 - Sun, Oct 12

6:35 pm - 8:50 amDEN-BHD

31h 15m1 stop

6:50 am - 4:25 pmBHD-DEN

16h 35m1 stop

$1,295British Airways

Find Deal

Thu, Oct 2 - Sun, Oct 12

Delta flights from Colorado to Belfast

Our best Delta deals on Colorado to Belfast flight tickets

Delta

Oct 2

DEN2:00 pmDenver Intl

24h 15m

2 stops

BHD9:15 pmBelfast City

Oct 12

BHD6:30 amBelfast City

23h 44m

2 stops

DEN11:14 pmDenver Intl

$812

Find similar

Delta

Oct 2

DEN2:00 pmDenver Intl

24h 15m

2 stops

BHD9:15 pmBelfast City

Oct 12

BHD6:30 amBelfast City

16h 12m

2 stops

DEN3:42 pmDenver Intl

$900

Find similar

British Airways flights from Colorado to Belfast

Our best British Airways deals on Colorado to Belfast flight tickets

British Airways

Mar 17

DEN6:25 pmDenver Intl

14h 25m

1 stop

BHD2:50 pmBelfast City

Mar 22

BHD8:25 pmBelfast City

26h 05m

1 stop

DEN4:30 pmDenver Intl

$681

Find similar

British Airways

Mar 17

DEN12:36 pmDenver Intl

15h 54m

2 stops

BHD10:30 amBelfast City

Mar 22

BHD8:25 pmBelfast City

26h 05m

1 stop

DEN4:30 pmDenver Intl

$685

Find similar

British Airways

Oct 2

DEN6:35 pmDenver Intl

31h 15m

1 stop

BHD8:50 amBelfast City

Oct 12

BHD6:50 amBelfast City

18h 04m

2 stops

DEN5:54 pmDenver Intl

$1,039

Find similar

Fly from

Fly to

Route

Depart

Return

Price

DenverBelfast

DEN - BHD

DENBHD

Denver Intl

Tue 3/17

6:25 pm-2:50 pm

1 stop14h 25m

Belfast City

Sun 3/22

8:25 pm-4:30 pm

1 stop26h 05m

$681

DenverBelfast

DEN - BHD

DENBHD

Denver Intl

Tue 3/17

12:36 pm-10:30 am

2 stops15h 54m

Belfast City

Sun 3/22

8:25 pm-4:30 pm

1 stop26h 05m

$685

DenverBelfast

DEN - BFS

DENBFS

Denver Intl

Wed 11/5

3:40 pm-10:20 pm

2 stops23h 40m

Belfast Intl

Wed 11/12

6:30 am-6:05 pm

2 stops18h 35m

$695

DenverBelfast

DEN - BHD

DENBHD

Denver Intl

Thu 10/2

2:00 pm-9:15 pm

2 stops24h 15m

Belfast City

Sun 10/12

6:30 am-11:14 pm

2 stops23h 44m

$812

DenverBelfast

DEN - BHD

DENBHD

Denver Intl

Tue 3/17

12:55 pm-11:30 am

2 stops16h 35m

Belfast City

Sun 3/22

8:25 pm-9:51 pm

2 stops31h 26m

$882

DenverBelfast

DEN - BHD

DENBHD

Denver Intl

Thu 10/2

2:00 pm-9:15 pm

2 stops24h 15m

Belfast City

Sun 10/12

6:30 am-3:42 pm

2 stops16h 12m

$900

DenverBelfast

DEN - BHD

DENBHD

Denver Intl

Thu 10/2

6:35 pm-8:50 am

1 stop31h 15m

Belfast City

Sun 10/12

6:50 am-5:54 pm

2 stops18h 04m

$1,039

DenverBelfast

DEN - BHD

DENBHD

Denver Intl

Thu 10/2

6:35 pm-8:50 am

1 stop31h 15m

Belfast City

Sun 10/12

6:50 am-4:25 pm

1 stop16h 35m

$1,104

DenverBelfast

DEN - BHD

DENBHD

Denver Intl

Thu 10/2

6:35 pm-8:50 am

1 stop31h 15m

Belfast City

Sun 10/12

6:50 am-7:26 pm

2 stops19h 36m

$1,120

DenverBelfast

DEN - BHD

DENBHD

Denver Intl

Thu 10/2

6:35 pm-8:50 am

1 stop31h 15m

Belfast City

Sun 10/12

6:50 am-4:25 pm

1 stop16h 35m

$1,295

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

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

Prices

Airlines

What is the cheapest day to depart on your flight to Belfast?

The cheapest day to depart from Colorado to Belfast is on a Thursday when prices can be found for as low as $688. When flying out on a Friday, the most expensive travel day of the week, you can expect to see flight prices from Colorado to Belfast for around $1,000.

What is the cheapest time of day to depart on your flight to Belfast?

Our data shows that the cheapest Colorado to Belfast flights are usually those with departure times in the morning. Our users have found flights to Belfast in the morning for as low as $675. Try not to purchase tickets in the afternoon because they tend to be around $745. Of course, these prices can vary depending on the time of year and what airport you fly to.

Cheap Colorado to Belfast flight deals and tips

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

Direct flights	None

There are no direct flights from Colorado to Belfast. There are no popular flight routes from Colorado to Belfast.

Search flight deals

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?
There is 1 operator available for flights from Colorado to Belfast as of September 2025.
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 Airways	PriceFrom $608	Free Cancellation	Rating 6.7 7,386 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.