$247 Cheap Flights from Denver (DEN) to Belfast (BHD)

View $247 flight on Wed, Aug 19, 2026Opens in a new window

Popular airlines from Denver Intl. Airport (DEN) to Belfast (BHD-George Best Belfast City)

  • Be in the know

    Get alerts if flight prices drop or rise*

  • Book smarter

    Save up to 30% on select hotels after you book a flight*

  • Earn twice

    Earn your airline miles on top of our OneKeyCash
    Learn about One Key

Cheap Flights from Denver to Belfast (DEN-BHD)

Prices were available within the past 7 days and start at $247 for one-way flights and $556 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

British Airways
Tue, Aug 4 - Tue, Aug 18
DEN
Denver
BHD
Belfast
$556 Roundtrip, found 4 days ago
$556
Roundtrip
found 4 days ago
Select British Airways flight, departing Tue, Aug 4 from Denver to Belfast, returning Tue, Aug 18, priced at $556 found 4 days ago
American Airlines
Fri, Feb 20 - Fri, Feb 27
DEN
Denver
BHD
Belfast
$559 Roundtrip, found 4 days ago
$559
Roundtrip
found 4 days ago
Select American Airlines flight, departing Fri, Feb 20 from Denver to Belfast, returning Fri, Feb 27, priced at $559 found 4 days ago
American Airlines
Fri, Feb 20 - Fri, Feb 27
DEN
Denver
BHD
Belfast
$569 Roundtrip, found 4 days ago
$569
Roundtrip
found 4 days ago
Select American Airlines flight, departing Fri, Feb 20 from Denver to Belfast, returning Fri, Feb 27, priced at $569 found 4 days ago
American Airlines
Fri, Feb 20 - Fri, Feb 27
DEN
Denver
BHD
Belfast
$571 Roundtrip, found 4 days ago
$571
Roundtrip
found 4 days ago
Select American Airlines flight, departing Fri, Feb 20 from Denver to Belfast, returning Fri, Feb 27, priced at $571 found 4 days ago
American Airlines
Tue, Aug 4 - Tue, Aug 18
DEN
Denver
BHD
Belfast
$578 Roundtrip, found 4 days ago
$578
Roundtrip
found 4 days ago
Select American Airlines flight, departing Tue, Aug 4 from Denver to Belfast, returning Tue, Aug 18, priced at $578 found 4 days ago
American Airlines
Tue, Aug 4 - Tue, Aug 18
DEN
Denver
BHD
Belfast
$583 Roundtrip, found 4 days ago
$583
Roundtrip
found 4 days ago
Select American Airlines flight, departing Tue, Aug 4 from Denver to Belfast, returning Tue, Aug 18, priced at $583 found 4 days ago
American Airlines
Tue, Aug 4 - Tue, Aug 18
DEN
Denver
BHD
Belfast
$584 Roundtrip, found 4 days ago
$584
Roundtrip
found 4 days ago
Select American Airlines flight, departing Tue, Aug 4 from Denver to Belfast, returning Tue, Aug 18, priced at $584 found 4 days ago
Virgin Atlantic
Tue, Aug 4 - Tue, Aug 18
DEN
Denver
BHD
Belfast
$639 Roundtrip, found 4 days ago
$639
Roundtrip
found 4 days ago
Select Virgin Atlantic flight, departing Tue, Aug 4 from Denver to Belfast, returning Tue, Aug 18, priced at $639 found 4 days ago
Delta
Mon, Mar 2 - Tue, Mar 17
DEN
Denver
BHD
Belfast
$714 Roundtrip, found 1 day ago
$714
Roundtrip
found 1 day ago
Select Delta flight, departing Mon, Mar 2 from Denver to Belfast, returning Tue, Mar 17, priced at $714 found 1 day ago
KLM
Sat, Feb 14 - Sat, Feb 21
DEN
Denver
BHD
Belfast
$770 Roundtrip, found 1 day ago
$770
Roundtrip
found 1 day ago
Select KLM flight, departing Sat, Feb 14 from Denver to Belfast, returning Sat, Feb 21, priced at $770 found 1 day ago

The Annual Vacation Sale

Members save up to 40% on hotels and homes. Plan this year’s big trip and save.
Book now
Flights from Denver (DEN) to Belfast (BHD)
Origin airport
Denver Intl.
Destination airport
George Best Belfast City
Airlines serving
Aer Lingus, American Airlines, British Airways, Delta, Finnair, KLM, Virgin Atlantic
Roundtrip price
$556
Distance
4350 mi

Denver to Belfast Flights

The cheapest times to fly from Denver to Belfast

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Denver to Belfast are during the month of August. You can find some of the cheapest flights from Denver to Belfast with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Denver to Belfast

Sunday is one of the best days to book for cheap flights from Denver to Belfast: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from Denver to Belfast

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Denver to Belfast in 2026. You can also book with separate airlines for your outbound and return journeys, from $247 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Denver to Belfast flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your Denver to Belfast airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Frequently asked questions

How much does a flight from Denver, CO (DEN-Denver Intl.) to Belfast (BHD-George Best Belfast City) cost?
You can find cheap one-way flights from $247 and cheap return flights from $556 Denver, CO (DEN-Denver Intl.) to Belfast (BHD-George Best Belfast City) with Expedia. One-way flights generally range between $256 and $3928. Flight prices vary based on the month and day of the week you want to travel, as well as the airline and how far in advance you book your ticket. Filter your search on Expedia by "Price (lowest to highest)" to see the cheapest fares first, and use the Price Tracking tool to receive alerts when Denver, CO (DEN-Denver Intl.) to Belfast (BHD-George Best Belfast City) ticket fares go up or down.*Typical price ranges based on flights available on Expedia in the last year. Prices include multi-airline options.
What is the cheapest month to fly from Denver, CO (DEN-Denver Intl.) to Belfast (BHD-George Best Belfast City)?
The cheapest month to fly from DEN to BHD is August when demand is low. Traveling in off-peak or shoulder months is usually a good way to secure cheap tickets, just remember to avoid flying during holidays if you're able to. Use the calendar view in your search to see which months have low fares on this route.
Which airlines fly direct from Denver, CO (DEN-Denver Intl.) to Belfast (BHD-George Best Belfast City)?
Enter DEN to BHD and your travel dates, then apply the 'Nonstop' filter to see only direct flights.
What is the cheapest airline that flies from Denver, CO (DEN-Denver Intl.) to Belfast (BHD-George Best Belfast City)?
American Airlines, Virgin Atlantic and British Airways are just some of the carriers that fly from Denver, CO (DEN-Denver Intl.) to Belfast (BHD-George Best Belfast City). Use Expedia's flight search tool to compare airlines on this route and find our cheapest option for your trip. Use Expedia's search tool to compare the prices and schedules of airlines that fly this route to find the best option for your plans and budget.*Prices based on flights available on Expedia in the last year.
How do I find cheap flights from Denver, CO (DEN-Denver Intl.) to Belfast (BHD-George Best Belfast City)?
To find a cheap flight from Denver, CO (DEN-Denver Intl.) to Belfast (BHD-George Best Belfast City), be flexible with your dates. Traveling outside of peak vacation months and booking a mid-week flight can help you save. Early morning and late night flights are often more affordable, too. Expedia allows you to compare flight times, airlines and routes all in one place to find low fares. You can also set up Price Tracking and receive alerts when fares go up or down.
What is the best time to fly from Denver, CO (DEN-Denver Intl.) to Belfast (BHD-George Best Belfast City)?
The best time to fly is usually mid-week (Tuesday or Wednesday) and during early morning hours as flights tend to be cheaper, less crowded, and generally more on-time. Avoid major holidays and peak vacation seasons for smoother travel. Combining off-peak days and hours often gives the best combination of cost, comfort, and convenience.
What is the earliest flight from Denver, CO (DEN-Denver Intl.) to Belfast (BHD-George Best Belfast City)?
The earliest flight from Denver, CO (DEN) to Belfast (BHD) usually leaves at around 5:00 AM, operated by American Airlines and British Airways. This flight is available in August, making it a great option for summer travelers heading to Northern Ireland. To compare early flights on Expedia, select the "Early Morning" and "Morning" filters in your search.
What day of the week has the most flights from Denver, CO (DEN-Denver Intl.) to Belfast (BHD-George Best Belfast City)?
a Sunday typically has the most flights from Denver Intl. (DEN) to George Best Belfast City (BHD), with approximately 47 flights available. This gives you plenty of options for your travel plans. Major airlines on this route include American Airlines, United, and Delta.
What are the most popular departure times for flights from Denver, CO (DEN-Denver Intl.) to Belfast (BHD-George Best Belfast City)?
The most popular departure times for flights from Denver International Airport (DEN) to George Best Belfast City Airport (BHD) are in the evening, from 6pm to 9pm. This time window accounts for around 43% of total traffic. Airlines like British Airways and American Airlines offer flights during this peak time, making it convenient for travelers heading to Belfast.
How long does it take to fly from Denver, CO (DEN-Denver Intl.) to Belfast (BHD-George Best Belfast City)?
A flight from DEN to BHD with a layover takes around 19 hours 50 minutes, with the route covering approximately 4,351 miles. Keep in mind that actual flight times can vary due to wind patterns, weather, and air traffic.
Can you fly business or first class from Denver, CO (DEN-Denver Intl.) to Belfast (BHD-George Best Belfast City)?
Business class is available on flights from DEN to BHD. Airlines that offer business class service on this route include:

  • American Airlines
  • British Airways
  • Delta Air Lines

How do I earn miles on a Denver, CO (DEN-Denver Intl.) to Belfast (BHD-George Best Belfast City) flight with Expedia?
It's easy to earn miles on a Denver, CO (DEN-Denver Intl.) to Belfast (BHD-George Best Belfast City) flight when you book with Expedia. Before you confirm your booking, simply select your frequent flyer program and enter your program number. As a member of One Key™, you can also earn OneKeyCash™* on top of your airline miles when you book with Expedia.*Excludes taxes and fees. OneKeyCash is not redeemable for cash and can only be used on Expedia and other participating brands.
What airports do you fly into for Belfast from Denver Intl. (DEN)?
From Denver Intl. (DEN), you can fly into Belfast Intl. (BFS) and George Best Belfast City (BHD) in Belfast. Some flights may connect through major hubs like Dallas-Fort Worth Intl. (DFW), O'Hare Intl. (ORD), Charlotte-Douglas Intl. (CLT) before reaching Belfast. Compare routes and airports on Expedia to find the best flight options for your travel plans.
Is it cheaper to buy a plane ticket from Denver, CO (DEN-Denver Intl.) to Belfast (BHD-George Best Belfast City) at the last minute?
Typically, booking a last minute flight from Denver, CO (DEN-Denver Intl.) to Belfast (BHD-George Best Belfast City) will be more expensive than booking in advance. As the departure date approaches, there are usually fewer seats available which can drive up the cost. However, if there's some wiggle room with your travel dates and times, you could bag a cheap last-minute fare.
Is it cheaper to book a Denver, CO (DEN-Denver Intl.) to Belfast (BHD-George Best Belfast City) flight and hotel package?
Securing a Denver, CO (DEN-Denver Intl.) to Belfast (BHD-George Best Belfast City) Belfast Vacation Packages is usually cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your travels all in one place. Select from our extensive range of stays and then add flights, activities and car rentals to your booking. Bundle everything together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Denver, CO (DEN-Denver Intl.) to Belfast (BHD-George Best Belfast City)?
If you booked your Denver, CO (DEN-Denver Intl.) to Belfast (BHD-George Best Belfast City) flight within the last 24 hours, you may be able to modify or cancel it without any fees. Depending on the airline and the type of ticket you have, additional charges may apply for changes beyond this timeframe. Airline policies and contact information can be found in your itinerary or confirmation email. Or, head to our Customer Service portal if you'd like more information.

*Flight schedules are subject to change.

Explore a world of travel with Expedia

*Available to One Key members.