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Cheap flights from Chicago O'Hare Intl Airport to Belfast from $311

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 O'Hare Intl Airport to Belfast departing on 1/9. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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0 bags

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Find the cheapest flights from Chicago O'Hare Intl Airport to Belfast

Cheap round-trip flights

Multiple Airlines Logo
6:30 pm - 6:55 pmORD-BFS
18h 25m2 stops
Multiple Airlines Logo
7:10 am - 5:20 pmBFS-ORD
16h 10m2 stops
$599Multiple Airlines
Find Deal
Sun, Nov 9 - Sun, Nov 16
Multiple Airlines Logo
8:15 pm - 10:45 pmORD-BFS
20h 30m3 stops
Multiple Airlines Logo
9:05 pm - 2:45 pmBFS-ORD
47h 40m3 stops
$637Multiple Airlines
Find Deal
Fri, Nov 7 - Fri, Nov 14
Multiple Airlines Logo
8:15 pm - 10:00 pmORD-BFS
19h 45m2 stops
Multiple Airlines Logo
9:05 pm - 2:45 pmBFS-ORD
47h 40m3 stops
$729Multiple Airlines
Find Deal
Fri, Nov 7 - Fri, Nov 14
Multiple Airlines Logo
7:30 pm - 3:25 pmORD-BFS
13h 55m2 stops
Multiple Airlines Logo
6:55 am - 6:20 pmBFS-ORD
16h 25m2 stops
$745Multiple Airlines
Find Deal
Sat, Oct 25 - Sat, Nov 1
Multiple Airlines Logo
6:15 pm - 11:40 pmORD-BFS
23h 25m3 stops
Multiple Airlines Logo
6:40 am - 3:45 pmBFS-ORD
38h 05m3 stops
$779Multiple Airlines
Find Deal
Sat, Oct 25 - Sat, Nov 1
Multiple Airlines Logo
6:15 pm - 12:50 amORD-BFS
24h 35m2 stops
Multiple Airlines Logo
6:40 am - 3:45 pmBFS-ORD
38h 05m3 stops
$819Multiple Airlines
Find Deal
Sat, Oct 25 - Sat, Nov 1
Multiple Airlines Logo
9:50 pm - 10:35 pmORD-BFS
18h 45m2 stops
Multiple Airlines Logo
5:45 am - 6:25 pmBFS-ORD
18h 40m2 stops
$841Multiple Airlines
Find Deal
Fri, Nov 7 - Fri, Nov 14
Multiple Airlines Logo
6:00 pm - 9:40 pmORD-BFS
21h 40m3 stops
Multiple Airlines Logo
9:20 pm - 11:05 amBFS-ORD
42h 45m3 stops
$889Multiple Airlines
Find Deal
Thu, Oct 23 - Thu, Oct 30
Multiple Airlines Logo
8:40 am - 2:05 pmORD-BFS
23h 25m2 stops
Multiple Airlines Logo
6:35 pm - 9:05 pmBFS-ORD
31h 30m2 stops
$896Multiple Airlines
Find Deal
Thu, Oct 23 - Thu, Oct 30
Multiple Airlines Logo
8:40 am - 2:05 pmORD-BFS
23h 25m2 stops
Multiple Airlines Logo
6:35 pm - 9:05 pmBFS-ORD
31h 30m2 stops
$917Multiple Airlines
Find Deal
Thu, Oct 23 - Thu, Oct 30

momondo Fare Finder

 
Customize your flight search to find flights from Chicago O'Hare Intl Airport 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 September 25, 2025.
Use the filters below to find and compare flights from Chicago O'Hare Intl Airport 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

Sun 11/9

6:30 pm-6:55 pm

2 stops18h 25m

Belfast Intl

Sun 11/16

7:10 am-5:20 pm

2 stops16h 10m

$599

ChicagoBelfast

ORD - BFS

ORDBFS

Chicago O'Hare Intl

Fri 11/7

8:15 pm-10:45 pm

3 stops20h 30m

Belfast Intl

Fri 11/14

9:05 pm-2:45 pm

3 stops47h 40m

$637

ChicagoBelfast

ORD - BFS

ORDBFS

Chicago O'Hare Intl

Fri 11/7

8:15 pm-10:00 pm

2 stops19h 45m

Belfast Intl

Fri 11/14

9:05 pm-2:45 pm

3 stops47h 40m

$729

ChicagoBelfast

ORD - BFS

ORDBFS

Chicago O'Hare Intl

Sat 10/25

7:30 pm-3:25 pm

2 stops13h 55m

Belfast Intl

Sat 11/1

6:55 am-6:20 pm

2 stops16h 25m

$745

ChicagoBelfast

ORD - BFS

ORDBFS

Chicago O'Hare Intl

Sat 10/25

6:15 pm-11:40 pm

3 stops23h 25m

Belfast Intl

Sat 11/1

6:40 am-3:45 pm

3 stops38h 05m

$779

ChicagoBelfast

ORD - BFS

ORDBFS

Chicago O'Hare Intl

Sat 10/25

6:15 pm-12:50 am

2 stops24h 35m

Belfast Intl

Sat 11/1

6:40 am-3:45 pm

3 stops38h 05m

$819

ChicagoBelfast

ORD - BFS

ORDBFS

Chicago O'Hare Intl

Fri 11/7

9:50 pm-10:35 pm

2 stops18h 45m

Belfast Intl

Fri 11/14

5:45 am-6:25 pm

2 stops18h 40m

$841

ChicagoBelfast

ORD - BFS

ORDBFS

Chicago O'Hare Intl

Thu 10/23

6:00 pm-9:40 pm

3 stops21h 40m

Belfast Intl

Thu 10/30

9:20 pm-11:05 am

3 stops42h 45m

$889

ChicagoBelfast

ORD - BFS

ORDBFS

Chicago O'Hare Intl

Thu 10/23

8:40 am-2:05 pm

2 stops23h 25m

Belfast Intl

Thu 10/30

6:35 pm-9:05 pm

2 stops31h 30m

$896

ChicagoBelfast

ORD - BFS

ORDBFS

Chicago O'Hare Intl

Thu 10/23

8:40 am-2:05 pm

2 stops23h 25m

Belfast Intl

Thu 10/30

6:35 pm-9:05 pm

2 stops31h 30m

$917

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 13 resultsSorted by cheapest first
1
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See travel insights to Belfast from

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

Are you open to changing your travel dates? Check out the ideal times to fly from Chicago O'Hare Intl Airport 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 O'Hare Intl Airport to Belfast Intl Airport (ORD to BFS) flight deals and tips

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

Direct flights

None
There are no direct flights from Chicago O'Hare Intl Airport to Belfast Intl Airport. There are no popular flight routes from Chicago O'Hare Intl Airport to Belfast Intl Airport.
Search flight deals

  • How far is Chicago O'Hare Intl to Belfast Intl by plane?

    A flight from Chicago O'Hare Intl to Belfast Intl will travel around 3629.9 mi. Flights usually cover this in 13h 55m, depending on flying conditions and air traffic around both airports.

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

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

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

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

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Chicago O'Hare Intl Airport 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 O'Hare Intl Airport to Belfast Intl Airport?

Best airlines flying from Chicago O'Hare Intl Airport to Belfast Intl Airport

Compare and see reviews for airlines that fly from Chicago O'Hare Intl Airport to Belfast Intl Airport with momondo
Airline
Rating
Free Cancellation
Price
British AirwaysPriceFrom $577Free CancellationRating
6.7
7,399 reviews
Search British Airways flights

Traveling to a place near Belfast?

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

Why use momondo?

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

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from Chicago to Belfast. momondo saves you time and could save you money on your trip.

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

Flights from Chicago to Belfast with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

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

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Belfast from Chicago.

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

If you are not ready to book a flight from Chicago to Belfast now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Belfast and let you know when they change.

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