$448 Find Cheap Flights from Denver to Belfast

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Denver to Belfast departing on 10/2. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy

KAYAK searches hundreds of travel sites at once for deals on flights to Belfast

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Denver to Belfast, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Denver to Belfast, as well as popular online travel agencies
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Flight Deals

Cheap Flights from Denver to Belfast (DEN-BHD)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Denver to Belfast that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Denver to Belfast

Wed, Oct 29 - Wed, Nov 5
Logo
4:40 pm - 8:40 pmDEN-BFS
22h 00m2 stops
Logo
7:20 am - 6:05 pmBFS-DEN
17h 45m2 stops
$777
Find Deal
Thu, Oct 2 - Sun, Oct 12
British Airways Logo
7:55 pm - 8:55 pmDEN-BHD
18h 00m2 stops
British Airways Logo
6:50 am - 7:26 pmBHD-DEN
19h 36m2 stops
$895British Airways
Find Deal
Thu, Oct 2 - Sun, Oct 12
British Airways Logo
6:59 pm - 8:45 pmDEN-BHD
42h 46m2 stops
British Airways Logo
6:50 am - 7:26 pmBHD-DEN
19h 36m2 stops
$952British Airways
Find Deal
Thu, Oct 2 - Sun, Oct 12
Aer Lingus Logo
7:55 pm - 7:55 pmDEN-BHD
17h 00m2 stops
Aer Lingus Logo
7:00 am - 5:59 pmBHD-DEN
17h 59m2 stops
$962Aer Lingus
Find Deal
Thu, Oct 2 - Sun, Oct 12
Aer Lingus Logo
6:35 pm - 8:50 amDEN-BHD
31h 15m1 stop
Aer Lingus Logo
7:00 am - 5:59 pmBHD-DEN
17h 59m2 stops
$966Aer Lingus
Find Deal
Thu, Oct 2 - Sun, Oct 12
Aer Lingus Logo
6:35 pm - 8:50 amDEN-BHD
31h 15m1 stop
Aer Lingus Logo
7:00 am - 5:59 pmBHD-DEN
17h 59m2 stops
$982Aer Lingus
Find Deal
Thu, Oct 2 - Sun, Oct 12
British Airways Logo
6:35 pm - 8:50 amDEN-BHD
31h 15m1 stop
British Airways Logo
6:50 am - 4:25 pmBHD-DEN
16h 35m1 stop
$1,007British Airways
Find Deal
Fri, Oct 10 - Fri, Oct 17
Logo
6:14 pm - 8:45 pmDEN-BHD
19h 31m2 stops
Logo
9:30 am - 8:27 pmBHD-DEN
17h 57m2 stops
$1,034
Find Deal
Thu, Oct 2 - Sun, Oct 12
British Airways Logo
6:35 pm - 8:50 amDEN-BHD
31h 15m1 stop
British Airways Logo
6:50 am - 4:25 pmBHD-DEN
16h 35m1 stop
$1,045British Airways
Find Deal
Sat, Oct 4 - Wed, Oct 8
Delta Logo
6:25 pm - 4:55 pmDEN-BHD
39h 30m2 stops
Delta Logo
6:30 am - 3:42 pmBHD-DEN
16h 12m2 stops
$1,468Delta
Find Deal

Everything you should know

Top airlines
British Airways
Cheapest • from $895 (round-trip)
British Airways
Best reviews • 6.6 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
Cheapest round-trip
$777
Multiple Airlines
Wed 10/29Wed 11/5
DEN - BFS • 2 stops
Cheapest one-way
$448
KLM
Thu 10/2
DEN - BHD • 2 stops
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KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to Belfast!
Booking Insights

KAYAK's insights & trends for Denver to Belfast flights

Get data-powered insights and trends into flights from Denver to Belfast to help you find the cheapest flights, the best time to fly and much more.

Which airlines provide the cheapest flights from Denver to Belfast?

The cheapest round-trip price for the route for each airline clicked by KAYAK users in the last 72 hours.

In the past 3 days, the cheapest round-trip tickets from Denver to Belfast were found on British Airways ($895) and Aer Lingus ($962).

Find deals

Good to know

Cheapest flight$448
Flight from Denver to Belfast City Airport

When to book flights from Denver to Belfast

Are your dates flexible? Find out the best times to travel from Denver to Belfast based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from Denver to Belfast

  • What is the cheapest flight from Denver to Belfast?

    In the last 3 days, the lowest price for a flight from Denver to Belfast was $448 for a one-way ticket and $777 for a round-trip.

  • Do I need a passport to fly between Denver and Belfast?

    A passport is required to fly from Denver to Belfast.

  • Which airports will I be using when flying from Denver to Belfast?

    On your way to Belfast, you’ll fly out from Denver Intl. You’ll be landing in one of Belfast’s 2 airports: Belfast Intl or Belfast City.

  • Which aircraft models fly most regularly from Denver to Belfast?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from Denver to Belfast?

    SkyTeam, and oneworld are the airline alliances operating flights between Denver and Belfast, with SkyTeam being the most commonly used for this route.

  • How does KAYAK find such low prices on flights from Denver to Belfast?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Denver to Belfast.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Denver to Belfast?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Belfast from Denver is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Denver to Belfast?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Belfast with an airline and back to Denver with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Denver to Belfast?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Belfast from Denver up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top airline flying from Denver to Belfast

 
See real verified KAYAK customer reviews for airlines flying from Denver to Belfast. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Denver to Belfast? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
6.6
British AirwaysOverall score based on 7361 reviews
7.6Crew
6.7Comfort
6.4Entertainment
6.9Boarding
6.3Food
Airline reviews

The seating has become ridiculous… like a contest to see how narrow and short they can be made- forcing anyone over 5’1 to pay more to not be twisting oneself into a pretzel. Really insane- would have thought BA was better than this. Frankly- it cancels out a lot of the positive aspects.

4.0 OkayAnonymous, Sep 2025BOS - LHR
Read more British Airways reviews

The seating has become ridiculous… like a contest to see how narrow and short they can be made- forcing anyone over 5’1 to pay more to not be twisting oneself into a pretzel. Really insane- would have thought BA was better than this. Frankly- it cancels out a lot of the positive aspects.

flight was delayed from BWI to London - missed my connecting flight & then connecting flight (also British Air) was delayed - food is awful, TV & movie selection is great

Super tight economy class. My knees were hitting the back of seat in front of me (I'm only 5'6"). My small backpack (sized according to their required dimensions) would not fit under the seat in front of me because there is a box (is that the life jacket?) in the way. Over all, extremely uncomfortable. I forgive the tasteless food, but the tight seating was torture

Didn’t fly with them as someone had cancelled my flight

Online check-in 24 hours in advance something seems not so easy to check in to pick seats and to print a boarding pass

I like the crew, very welcoming. Food can be better. The seat arms don’t go up so. I could use the empty seat next to mine to relax better. 3hrs delay 😠

The flight was very delayed in taking off - which was out of control of the crew, but then the pilot worked hard so we only arrived about 30 minutes late. Everyone was very friendly and accommodating!

Boarding was efficient and quick, crew was very attentive, seats were comfortable.

Everything was very good! I personally struggled with the heat in the cabin for the first 2 hours

Very caring crew on board. Didn’t have dinner as I was sleeping. Was seating in the emergency row so I had comfortable leg room

Everything you need to know for your flight from Denver to Belfast

Information on your arrival and departure airports

Denver (DEN)

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