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Cheap flights from Chicago to Belfast from $249

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Chicago to Belfast departing on 1/6. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

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Find the cheapest flights from Chicago to Belfast

Cheap round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
6:30 pm - 7:05 pm
ORD
-
BFS
18h 35m2 stops
Multiple Airlines Logo
6:50 pm - 5:20 pm
BFS
-
ORD
28h 30m3 stops
$616Multiple Airlines
Mon, Feb 2 - Mon, Feb 9
Multiple Airlines Logo
6:30 pm - 8:10 pm
ORD
-
BFS
19h 40m2 stops
Multiple Airlines Logo
6:30 am - 5:20 pm
BFS
-
ORD
16h 50m2 stops
$738Multiple Airlines
Mon, Feb 2 - Mon, Feb 9
Multiple Airlines Logo
4:38 pm - 8:10 pm
ORD
-
BFS
21h 32m3 stops
Multiple Airlines Logo
10:20 pm - 5:20 pm
BFS
-
ORD
25h 00m3 stops
$760Multiple Airlines
Mon, Feb 2 - Mon, Feb 9

momondo Fare Finder

 
Customize your flight search to find flights from Chicago to Belfast Intl Airport that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 832,500 searches. Data last updated December 21, 2025.
Use the filters below to find and compare flights from Chicago to Belfast Intl Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

ChicagoBelfast

ORD - BFS

ORDBFS

Chicago O'Hare Intl

Mon 2/2

6:30 pm-7:05 pm

2 stops18h 35m

Belfast Intl

Mon 2/9

6:50 pm-5:20 pm

3 stops28h 30m

$616

ChicagoBelfast

ORD - BFS

ORDBFS

Chicago O'Hare Intl

Mon 2/2

6:30 pm-8:10 pm

2 stops19h 40m

Belfast Intl

Mon 2/9

6:30 am-5:20 pm

2 stops16h 50m

$738

ChicagoBelfast

ORD - BFS

ORDBFS

Chicago O'Hare Intl

Mon 2/2

4:38 pm-8:10 pm

3 stops21h 32m

Belfast Intl

Mon 2/9

10:20 pm-5:20 pm

3 stops25h 00m

$760

ChicagoBelfast

ORD - BFS

ORDBFS

Chicago O'Hare Intl

Tue 1/6

6:30 pm-8:15 pm

2 stops19h 45m

$249

ChicagoBelfast

ORD - BFS

ORDBFS

Chicago O'Hare Intl

Thu 1/15

4:38 pm-7:40 am

3 stops33h 02m

$330

ChicagoBelfast

ORD - BFS

ORDBFS

Chicago O'Hare Intl

Thu 1/15

6:50 pm-3:10 pm

2 stops38h 20m

$367

Flights are sorted by cheapest round-trip flights first.

Sorted by cheapest first

See travel insights to Belfast from

How to get the cheapest flight ticket from Chicago to Belfast Intl Airport

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

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

The cheapest day to depart on your flight to Belfast Intl Airport is on a Wednesday when prices can be found for as low as $649. This is often the case because there is less demand to fly during this day of the week. When flying out on a Thursday, the most expensive travel day of the week, you can expect to see flight prices from Chicago to Belfast Intl Airport for around $938.

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

In the evening is the cheapest time of day to fly from Chicago to Belfast Intl Airport when you can find flight prices for as low as $769. Flying to Belfast Intl Airport in the evening is an ideal time because this is during off-peak travel hours. In contrast, the most expensive time of day to depart to Belfast Intl Airport is in the afternoon when prices are around $804.

When to book flights from Chicago to Belfast Intl Airport

Are you open to changing your travel dates? Check out the ideal times to fly from Chicago to Belfast Intl Airport according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Chicago to Belfast Intl Airport (CHI to BFS) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Chicago to Belfast Intl Airport

Fastest flight time

10h 50m

Direct flights

None
The fastest flight from Chicago to Belfast Intl Airport takes 10h 50m
There are no direct flights from Chicago to Belfast Intl Airport. There are no popular flight routes from Chicago to Belfast Intl Airport.
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  • How far is Chicago to Belfast Intl by plane?

    Chicago and Belfast Intl are 3624.6 mi apart from one another. Flights usually cover this in 10h 50m, depending on flying conditions and air traffic around both airports.

  • When did momondo last update prices for flights from Chicago to Belfast Intl Airport?

    Prices for flights from Chicago to Belfast Intl Airport were last updated today.

  • How many operators does momondo search for flights from Chicago to Belfast Intl Airport?

  • How old do you have to be to fly from Chicago to Belfast Intl Airport?

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Chicago to Belfast Intl Airport.

  • What documentation or ID do you need to fly to Belfast Intl Airport?

    The necessary travel and health documents for your Belfast Intl Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

  • What is the most popular airline from Chicago to Belfast Intl Airport?

Best airlines flying from Chicago to Belfast Intl Airport

Compare and see reviews for airlines that fly from Chicago to Belfast Intl Airport with momondo
Airline
Rating
Free Cancellation
Price
British AirwaysPriceFrom $577Free CancellationRating
6.7
7,600 reviews
Search British Airways flights

Traveling to a place near Belfast?

Book flights to Belfast if you plan to visit one of these locations
Armagh
Cookstown
Newry
Dungannon

Why use momondo?

Why should I use momondo to find a flight deal from Chicago to Belfast?

Finding the right flight to Belfast from Chicago is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to Belfast quick and easy, saving you time and money.

Can I find flights from Chicago to Belfast with flexible booking policies on momondo?

Yes. momondo enables you to select and highlight flights to Belfast from Chicago with this policy.

How can momondo help me find flights from Chicago to Belfast?

Once all potential Chicago to Belfast flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

I’m not ready to book a flight from Chicago to Belfast right now. Can momondo alert me if prices change?

If you are simply researching potential flights to Belfast, momondo offers a useful price alert feature which will track prices for flights to Belfast from Chicago and alert you when they change.

An easier way to manage your Belfast Intl Airport trip

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