What is the cheapest month to book a flight from Colorado to Belfast?

Currently, January is the cheapest month in which you can book a flight from Colorado to Belfast (average of £67). Flying from Colorado to Belfast in July is currently the most expensive (average of £90). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

In terms of precipitation, rainfall in Belfast ranges from 50.0 - 90.0 inches per month. October is typically the wettest month, when rainfall can reach 90.0 mm. April is typically the driest time to visit Belfast when rainfall is around 50.0 mm.

If weather is an important factor for your trip to Belfast, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 16.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 5.0 C).

What is the cheapest month to fly from Colorado to Belfast?

February is one of the best times of the year to fly to Belfast from Colorado. Prices for February average £647 per person but you can even find prices for as low as £482. The most expensive prices can be found in the month of December. Opting for a February flight can save you 77% on your journey compared to booking in December

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

When flying from Colorado to Belfast, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

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

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

How can I find direct flights from Colorado to Belfast?

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

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

Yes. Cheapflights offers flight deals from Colorado 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.

£277+ Flights from Colorado to Belfast

Cheap flight deals from Colorado to Belfast

Round-trip from	£450
One-way from	£277
Popular in	December
Cheapest in	February
Average price	£780

1/10-7/10
4 total stops
62h 50m total
Colorado to Belfast

Search Deals

British Airways
19/8
2 total stops
18h 15m total
Colorado to Belfast

Search Deals

Highest demand for flights based on searches. 10% potential increase in price (£55 potential increase over avg. return price).

Search Deals

Cheapest flight prices on average. 8% potential price decrease (£37 potential savings vs. average return price).

Search Deals

Average for round-trip flights in July 2025

Search Deals

Find flight deals from Colorado to Belfast

Cheapest flights from Colorado to Belfast
Explore the most affordable flight options available from Colorado to Belfast. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 11 July 2025.

Wed 1/1016:40DEN - BFS

2 stops23h 30mMultiple Airlines

Tue 7/1010:35BFS - DEN

2 stops39h 20mMultiple Airlines

Deal found 9/7£450

Sun 26/1017:27DEN - BHD

2 stops14h 28mBritish Airways

Sat 1/1118:00BHD - DEN

1 stop28h 30mBritish Airways

Deal found 10/7£492

Thu 2/1009:46DEN - BHD

2 stops18h 24mAmerican Airlines

Sun 12/1013:00BHD - DEN

2 stops17h 41mAmerican Airlines

Deal found 9/7£497

Thu 23/1016:00DEN - BHD

2 stops17h 55mDelta

Mon 3/1117:20BHD - DEN

2 stops34h 00mDelta

Deal found 10/7£553

Fri 3/1016:00DEN - BHD

2 stops22h 15mVirgin Atlantic

Tue 7/1006:30BHD - DEN

2 stops19h 40mVirgin Atlantic

Deal found 9/7£554

Fri 3/1014:00DEN - BHD

2 stops24h 15mKLM

Tue 7/1006:30BHD - DEN

2 stops18h 39mKLM

Deal found 8/7£592

Wed 1/1016:40DEN - BHD

3 stops21h 10mMultiple Airlines

Tue 7/1006:55BHD - DEN

3 stops19h 00mMultiple Airlines

Deal found 9/7£639

Sat 2/816:46DEN - BHD

2 stops35h 44mIberia

Tue 12/809:35BHD - DEN

1 stop13h 50mIberia

Deal found 11/7£733

Wed 8/1018:35DEN - BHD

1 stop11h 55mAer Lingus

Wed 22/1006:50BHD - DEN

1 stop16h 35mAer Lingus

Deal found 10/7£746

Best flights from Colorado to Belfast
Discover carefully curated flight deals from Colorado to Belfast that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 11 July 2025.

Wed 1/1016:40DEN - BFS

2 stops23h 30mMultiple Airlines

Tue 7/1010:35BFS - DEN

2 stops39h 20mMultiple Airlines

Deal found 9/7£450

Sun 26/1017:27DEN - BHD

2 stops14h 28mBritish Airways

Sat 1/1118:00BHD - DEN

1 stop28h 30mBritish Airways

Deal found 10/7£492

Thu 2/1009:46DEN - BHD

2 stops18h 24mAmerican Airlines

Sun 12/1013:00BHD - DEN

2 stops17h 41mAmerican Airlines

Deal found 9/7£497

Thu 23/1014:20DEN - BHD

2 stops19h 35mDelta

Wed 5/1106:30BHD - DEN

2 stops20h 50mDelta

Deal found 10/7£553

Fri 3/1016:00DEN - BHD

2 stops22h 15mVirgin Atlantic

Tue 7/1006:30BHD - DEN

2 stops19h 40mVirgin Atlantic

Deal found 9/7£554

Fri 3/1014:00DEN - BHD

2 stops24h 15mKLM

Tue 7/1006:30BHD - DEN

2 stops18h 39mKLM

Deal found 8/7£592

Sat 2/816:46DEN - BHD

2 stops35h 44mIberia

Tue 12/809:35BHD - DEN

1 stop13h 50mIberia

Deal found 11/7£733

Wed 8/1018:35DEN - BHD

1 stop11h 55mAer Lingus

Wed 22/1006:50BHD - DEN

1 stop16h 35mAer Lingus

Deal found 10/7£746

Wed 1/1016:40DEN - BHD

3 stops21h 10mMultiple Airlines

Tue 7/1006:55BHD - DEN

3 stops19h 00mMultiple Airlines

Deal found 9/7£639

Last-minute flights from Colorado to Belfast
Discover last-minute flight deals from Colorado to Belfast. Data last updated 11 July 2025 and is based on user searches.

Thu 31/716:36DEN - BHD

2 stops58h 34mFinnair

Thu 7/816:20BHD - DEN

2 stops36h 55mFinnair

Deal found 11/7£1,022

Fri 1/806:35DEN - BHD

2 stops27h 20mDelta

Tue 12/817:25BHD - DEN

2 stops33h 20mDelta

Deal found 11/7£642

Fri 1/818:10DEN - BHD

2 stops20h 05mKLM

Sun 10/806:30BHD - DEN

2 stops19h 35mKLM

Deal found 11/7£759

Sat 2/816:46DEN - BHD

2 stops35h 44mIberia

Tue 12/809:35BHD - DEN

1 stop13h 50mIberia

Deal found 11/7£733

Thu 7/818:35DEN - BHD

1 stop13h 55mAer Lingus

Thu 14/806:35BHD - DEN

1 stop16h 50mAer Lingus

Deal found 11/7£837

Mon 11/810:35DEN - BHD

2 stops15h 45mBritish Airways

Tue 19/806:45BHD - DEN

2 stops20h 03mBritish Airways

Deal found 9/7£531

Mon 11/818:35DEN - BHD

1 stop14h 05mAmerican Airlines

Tue 19/809:35BHD - DEN

1 stop13h 50mAmerican Airlines

Deal found 9/7£633

Mon 11/816:40DEN - BFS

2 stops19h 05mMultiple Airlines

Tue 19/823:10BFS - DEN

3 stops43h 17mMultiple Airlines

Deal found 9/7£645

Mon 11/816:40DEN - BHD

3 stops21h 15mMultiple Airlines

Tue 19/806:55BHD - DEN

3 stops19h 00mMultiple Airlines

Deal found 9/7£725

Cheapflights Fare Finder

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

DenverBelfast

DEN - BFS

DENBFS

Denver Intl

Wed 1/10

16:40-23:10

2 stops23h 30m

Belfast Intl

Tue 7/10

10:35-18:55

2 stops39h 20m

£450

DenverBelfast

DEN - BHD

DENBHD

Denver Intl

Sun 26/10

17:27-13:55

2 stops14h 28m

Belfast City

Sat 1/11

18:00-16:30

1 stop28h 30m

£492

DenverBelfast

DEN - BHD

DENBHD

Denver Intl

Thu 2/10

09:46-11:10

2 stops18h 24m

Belfast City

Sun 12/10

13:00-23:41

2 stops17h 41m

£497

DenverBelfast

DEN - BHD

DENBHD

Denver Intl

Thu 23/10

16:00-16:55

2 stops17h 55m

Belfast City

Mon 3/11

17:20-20:20

2 stops34h 00m

£553

DenverBelfast

DEN - BHD

DENBHD

Denver Intl

Fri 3/10

16:00-21:15

2 stops22h 15m

Belfast City

Tue 7/10

06:30-19:10

2 stops19h 40m

£554

DenverBelfast

DEN - BHD

DENBHD

Denver Intl

Fri 3/10

14:00-21:15

2 stops24h 15m

Belfast City

Tue 7/10

06:30-18:09

2 stops18h 39m

£592

DenverBelfast

DEN - BHD

DENBHD

Denver Intl

Wed 1/10

16:40-20:50

3 stops21h 10m

Belfast City

Tue 7/10

06:55-18:55

3 stops19h 00m

£639

DenverBelfast

DEN - BHD

DENBHD

Denver Intl

Sat 2/8

16:46-11:30

2 stops35h 44m

Belfast City

Tue 12/8

09:35-16:25

1 stop13h 50m

£733

DenverBelfast

DEN - BHD

DENBHD

Denver Intl

Wed 8/10

18:35-13:30

1 stop11h 55m

Belfast City

Wed 22/10

06:50-16:25

1 stop16h 35m

£746

DenverBelfast

DEN - BHD

DENBHD

Denver Intl

Tue 19/8

14:05-15:20

2 stops18h 15m

£277

Flights are sorted by cheapest return flights first.

Deals found on 9/7

Best time to book a flight from Colorado to Belfast

Have a flexible travel schedule? Discover the best time to fly to Belfast from Colorado with our price prediction graph.

Estimated return 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 Colorado to Belfast

How much does it cost for a return flight from Colorado to Belfast?

Reviews of airlines servicing Belfast

Check out reviews from past customers who have flown with Delta, KLM, andVirgin Atlantic from Colorado to Belfast to help guide your decision. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.

Delta

8.0

Very Good

7,951 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

Delta

8.0

Very Good

7,951 reviews

Delta

8.0

Very Good

7,951 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

KLM

7.8

Good

1,372 reviews

Delta

8.0

Very Good

7,951 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

Virgin Atlantic

7.4

Good

654 reviews

Delta

8.0

Very Good

7,951 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

American Airlines

7.2

Good

10,000 reviews

Delta

8.0

Very Good

7,951 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

Aer Lingus

7.1

Good

1,154 reviews

Delta

8.0

Very Good

7,951 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

Related info for your journey

Can I find deals for flights from Colorado to Belfast that include hotel bookings?
Yes. In addition to deals on Colorado to Belfast flights, Cheapflights offers holiday packages that include both flights and hotel.
How can I find direct flights from Colorado to Belfast?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Colorado to Belfast.
Can I find deals for business class flights from Colorado to Belfast?
Yes. Cheapflights offers flight deals from Colorado 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.
What is the cheapest month to book a flight from Colorado to Belfast?
Currently, January is the cheapest month in which you can book a flight from Colorado to Belfast (average of £67). Flying from Colorado to Belfast in July is currently the most expensive (average of £90). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

Alternative routes for Colorado to Belfast

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Fly with Cheapflights

How does Cheapflights help users find flights from Colorado to Belfast?

Cheapflights goes through 900+ travel sites to look for the best flight deals for flights from Colorado to Belfast. Too many options? Cheapflights also provides filters for things like airlines, price ranges, and number of stops to help you make a decision easily.

Why should you use Cheapflights to find cheap flight tickets from Colorado to Belfast?

Cheapflights helps you find that perfect flight to Belfast from Colorado by searching from hundreds of airlines and agencies you know and love. We are also free to use, in case you were wondering!

Can Cheapflights find flights from Colorado to Belfast with no change fees?

Certainly. Search results for flights to Belfast from Colorado shown to you on Cheapflights can be narrowed down with different useful search filters, which includes flexible booking options.

Can Cheapflights notify me if prices for flights from Colorado to Belfast become cheaper?

Yes, Cheapflights has a feature called Price Alert, which notifies users when flight prices change. Track prices for your flight to Belfast from Colorado today and book when prices fit your budget.

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Cheap flights from Colorado to Belfast from £277

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 19/8. Fares are subject to change and may not be available on all flights or dates of travel.

Cheap flight deals from Colorado to Belfast

Keep the following information in mind while searching for Colorado to Belfast flight deals. Data was last updated 11 July 2025.

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Find flight deals from Colorado to Belfast

Cheapest flights from Colorado to BelfastExplore the most affordable flight options available from Colorado to Belfast. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 11 July 2025.

Explore the most affordable flight options available from Colorado to Belfast. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 11 July 2025.

Cheapflights Fare Finder

Use the filters below to find and compare flights from Colorado to Belfast that are best for you.

Best time to book a flight from Colorado to Belfast

Have a flexible travel schedule? Discover the best time to fly to Belfast from Colorado with our price prediction graph.

Cheapflights Insights

Everything you need to know about your flight from Colorado to Belfast

How much does it cost for a return flight from Colorado to Belfast?

Reviews of airlines servicing Belfast

Check out reviews from past customers who have flown with Delta, KLM, andVirgin Atlantic from Colorado to Belfast to help guide your decision. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.

Related info for your journey

Find useful and relevant information for your journey from Colorado to Belfast. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

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

How can I find direct flights from Colorado to Belfast?

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

What is the cheapest month to book a flight from Colorado to Belfast?

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Colorado to Belfast

See prices for flight routes from nearby airports that may be better suited for you.

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from Colorado to Belfast?

Why should you use Cheapflights to find cheap flight tickets from Colorado to Belfast?

Can Cheapflights find flights from Colorado to Belfast with no change fees?

Can Cheapflights notify me if prices for flights from Colorado to Belfast become cheaper?

100% Free

Book with Flexibility

Travel Smart

Cheapest flights from Colorado to Belfast
Explore the most affordable flight options available from Colorado to Belfast. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 11 July 2025.