$400 Cheap Flights from Chicago (ORD) to Belfast (BFS)

View $400 flight on Mon, Sep 8, 2025Opens in a new window

Popular airlines from Chicago O'Hare Intl. Airport (ORD) to Belfast International Airport (BFS)

Find available prices by choosing your travel dates.

Cheap Flights from Chicago to Belfast (ORD-BFS)

Prices were available within the past 7 days and start at $400 for one-way flights and $665 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Iberia
Wed, Sep 10 - Wed, Sep 17
ORD
Chicago
BHD
Belfast
$665 Roundtrip, found 5 days ago
$665
Roundtrip
found 5 days ago
Select Iberia flight, departing Wed, Sep 10 from Chicago to Belfast, returning Wed, Sep 17, priced at $665 found 5 days ago
American Airlines
Wed, Aug 13 - Wed, Aug 20
ORD
Chicago
BHD
Belfast
$666 Roundtrip, found 6 hours ago
$666
Roundtrip
found 6 hours ago
Select American Airlines flight, departing Wed, Aug 13 from Chicago to Belfast, returning Wed, Aug 20, priced at $666 found 6 hours ago
British Airways
Mon, Sep 8 - Mon, Sep 22
ORD
Chicago
BHD
Belfast
$668 Roundtrip, just found
$668
Roundtrip
just found
Select British Airways flight, departing Mon, Sep 8 from Chicago to Belfast, returning Mon, Sep 22, priced at $668 just found
American Airlines
Wed, Aug 13 - Wed, Aug 20
ORD
Chicago
BHD
Belfast
$675 Roundtrip, found 6 hours ago
$675
Roundtrip
found 6 hours ago
Select American Airlines flight, departing Wed, Aug 13 from Chicago to Belfast, returning Wed, Aug 20, priced at $675 found 6 hours ago
British Airways
Mon, Sep 8 - Mon, Sep 22
ORD
Chicago
BHD
Belfast
$677 Roundtrip, just found
$677
Roundtrip
just found
Select British Airways flight, departing Mon, Sep 8 from Chicago to Belfast, returning Mon, Sep 22, priced at $677 just found
British Airways
Mon, May 5 - Mon, May 12
ORD
Chicago
BHD
Belfast
$678 Roundtrip, found 1 day ago
$678
Roundtrip
found 1 day ago
Select British Airways flight, departing Mon, May 5 from Chicago to Belfast, returning Mon, May 12, priced at $678 found 1 day ago
American Airlines
Tue, May 13 - Tue, May 20
ORD
Chicago
BHD
Belfast
$680 Roundtrip, found 3 days ago
$680
Roundtrip
found 3 days ago
Select American Airlines flight, departing Tue, May 13 from Chicago to Belfast, returning Tue, May 20, priced at $680 found 3 days ago
British Airways
Tue, May 13 - Tue, May 20
ORD
Chicago
BHD
Belfast
$682 Roundtrip, found 3 days ago
$682
Roundtrip
found 3 days ago
Select British Airways flight, departing Tue, May 13 from Chicago to Belfast, returning Tue, May 20, priced at $682 found 3 days ago
Delta
Wed, Sep 24 - Mon, Oct 6
ORD
Chicago
BHD
Belfast
$702 Roundtrip, found 4 days ago
$702
Roundtrip
found 4 days ago
Select Delta flight, departing Wed, Sep 24 from Chicago to Belfast, returning Mon, Oct 6, priced at $702 found 4 days ago
Virgin Atlantic
Wed, Aug 13 - Wed, Aug 20
ORD
Chicago
BHD
Belfast
$703 Roundtrip, found 6 hours ago
$703
Roundtrip
found 6 hours ago
Select Virgin Atlantic flight, departing Wed, Aug 13 from Chicago to Belfast, returning Wed, Aug 20, priced at $703 found 6 hours ago
Flights from Chicago (ORD) to Belfast (BHD)
Origin airport
O'Hare Intl.
Destination airport
George Best Belfast City
Roundtrip price
$665
Distance
3646 mi

Chicago to Belfast Flights

The cheapest times to fly from Chicago 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 Chicago to Belfast are during the month of September. You can find some of the cheapest flights from Chicago to Belfast with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Chicago to Belfast

Sunday is one of the best days to book for cheap flights from Chicago 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 Chicago 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 Chicago to Belfast in 2025. You can also book with separate airlines for your outbound and return journeys, from $400 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 Chicago 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 Chicago 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 O'Hare Intl. Airport (ORD) to Belfast Intl. Airport (BFS) cost?
Discover the latest flight deals from ORD to BFS by entering your preferred travel dates and searching on Expedia. Easily compare prices by departure date if you have flexibility with your schedule and use handy filters to explore prices for your preferred journey. As a member of One Key™, our free loyalty program, you can use Price Tracking to watch fares and receive notifications if prices go up or down.
What is the cheapest month to fly from ORD to BFS?
The cheapest flights from ORD to BFS are usually during off-peak season, when demand is lower. To save money, avoid flying during public holidays, school breaks and major local events.
What is the cheapest airline that flies from ORD to BFS?
Use the filter tool on Expedia to compare airlines and find the cheapest carrier that’ll take you from ORD to BFS. Sort your results by “Price (lowest to highest)” to snap up a great deal.
How many flights per day from O'Hare Intl. Airport (ORD) to Belfast Intl. Airport (BFS)?
Nonstop flights from O’Hare Intl. Airport (ORD) to Belfast Intl. Airport (BFS) aren’t available daily, so you’ll need to take a flight with a layover. Explore your options with our filter tool. Enter your travel dates and select either “1 Stop” or “2+ Stops.”
What day of the week has the most flights from ORD to BFS?
Generally you’ll find the most flight options available on a Friday. Tuesdays tend to be the quietest.* However, this can change depending on the time of year, carrier and other factors.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from O'Hare Intl. Airport (ORD) to Belfast Intl. Airport (BFS)?
To avoid possible delays on the O’Hare Intl. Airport (ORD) to Belfast Intl. Airport (BFS) route, aim to fly before 3 PM. Departures after this hour are 22% more likely to be canceled.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG’s global flight data platform.
Is it cheaper to buy a plane ticket from O'Hare Intl. Airport (ORD) to Belfast Intl. Airport (BFS) last-minute?
Last-minute fares from ORD to BFS are typically more expensive. To secure the cheapest rates, start looking for flights ahead of time. That being said, if your travel plans are flexible, it’s possible to land a cheap ticket right before your journey.
Is it cheaper to book an ORD to BFS flight and hotel package?
You can save money by booking an ORD to BFS flight and hotel package compared to booking separately. In fact, travelers could save hundreds of dollars by bundling with Expedia. And it’s easy to manage everything in one place. Once you’ve chosen your ideal accommodations and flights, consider adding extras like tours, activities and car rentals.
Can I cancel or change the date of my flight from O'Hare Intl. Airport (ORD) to Belfast Intl. Airport (BFS)?
If you reserved your ORD to BFS flight in the last 24 hours, you may be able to modify or cancel it at no cost. Depending on the airline and the type of ticket you have, additional charges may apply for changes beyond that time. 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.

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*Available to One Key members.