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Cheap flights from Chicago O'Hare Intl Airport to Belfast from £473

This is the cheapest return 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 4/2. 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 O'Hare Intl Airport to Belfast

Cheap return flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
18:30 - 16:10ORD-BFS
15h 40m2 stops
Multiple Airlines Logo
18:50 - 17:20BFS-ORD
28h 30m3 stops
£473Multiple Airlines
Find Deal
Wed, 4 Feb - Mon, 9 Feb
Multiple Airlines Logo
18:30 - 17:55ORD-BFS
17h 25m2 stops
Multiple Airlines Logo
06:30 - 17:20BFS-ORD
16h 50m2 stops
£495Multiple Airlines
Find Deal
Wed, 4 Feb - Mon, 9 Feb
Multiple Airlines Logo
18:30 - 23:55ORD-BFS
23h 25m3 stops
Multiple Airlines Logo
18:50 - 17:20BFS-ORD
28h 30m3 stops
£530Multiple Airlines
Find Deal
Wed, 4 Feb - Mon, 9 Feb
Multiple Airlines Logo
17:20 - 13:50ORD-BFS
14h 30m1 stop
Multiple Airlines Logo
05:45 - 19:15BFS-ORD
19h 30m2 stops
£833Multiple Airlines
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Sun, 11 Jan - Tue, 27 Jan
Multiple Airlines Logo
14:20 - 19:30ORD-BFS
23h 10m2 stops
Multiple Airlines Logo
19:35 - 17:50BFS-ORD
28h 15m3 stops
£845Multiple Airlines
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Thu, 14 May - Mon, 18 May
Multiple Airlines Logo
14:20 - 19:30ORD-BFS
23h 10m2 stops
Multiple Airlines Logo
05:50 - 17:50BFS-ORD
18h 00m2 stops
£895Multiple Airlines
Find Deal
Thu, 14 May - Mon, 18 May

momondo Fare Finder

 
Customise 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 279,928 searches. Data last updated 27 November 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

Wed 4/2

18:30-16:10

2 stops15h 40m

Belfast Intl

Mon 9/2

18:50-17:20

3 stops28h 30m

£473

ChicagoBelfast

ORD - BFS

ORDBFS

Chicago O'Hare Intl

Wed 4/2

18:30-17:55

2 stops17h 25m

Belfast Intl

Mon 9/2

06:30-17:20

2 stops16h 50m

£495

ChicagoBelfast

ORD - BFS

ORDBFS

Chicago O'Hare Intl

Wed 4/2

18:30-23:55

3 stops23h 25m

Belfast Intl

Mon 9/2

18:50-17:20

3 stops28h 30m

£530

ChicagoBelfast

ORD - BFS

ORDBFS

Chicago O'Hare Intl

Sun 11/1

17:20-13:50

1 stop14h 30m

Belfast Intl

Tue 27/1

05:45-19:15

2 stops19h 30m

£833

ChicagoBelfast

ORD - BFS

ORDBFS

Chicago O'Hare Intl

Thu 14/5

14:20-19:30

2 stops23h 10m

Belfast Intl

Mon 18/5

19:35-17:50

3 stops28h 15m

£845

ChicagoBelfast

ORD - BFS

ORDBFS

Chicago O'Hare Intl

Thu 14/5

14:20-19:30

2 stops23h 10m

Belfast Intl

Mon 18/5

05:50-17:50

2 stops18h 00m

£895

Flights are sorted by cheapest return flights first.

Sorted by cheapest first

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 return 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

Fastest flight time

10h 30m

Direct flights

None
The fastest flight from Chicago O'Hare Intl Airport to Belfast Intl Airport takes 10h 30m
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.
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  • How far is Chicago O'Hare Intl to Belfast Intl by plane?

    Chicago O'Hare Intl and Belfast Intl are 3629.9 mi apart from one another. Typically, this will take 14h 30m by plane in normal conditions.

  • 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 are refreshed on a daily basis.

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

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

    The travel and health documents you'll need for your trip to Belfast Intl Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Belfast Intl Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

  • How do I get Price Alerts for flights from Chicago O'Hare Intl Airport to Belfast Intl Airport?

    Confirm your travel details to search for the latest offers for flights from Chicago O'Hare Intl Airport to Belfast Intl Airport. While browsing offers there will be the option to toggle “Price Alerts”. You’ll then receive updates when prices for the flight route increase or decrease.

  • How can I save money on flights from Chicago O'Hare Intl Airport to Belfast Intl Airport with momondo?

    Plan your trips smart with the “Price Forecast” feature, which uses flight data to help you pick the best days to fly for the lowest fares. Our “Price Calendar” helps you get the most for your money by showing you when it’s most advantageous to fly. Curate your own travel experiences for less with “Explore”. Expert travel hacks to fuel your next adventure are a click away with “Discover” by momondo. Set up our “Price Alerts” to track fare changes and book when prices are at their lowest point.

  • How does momondo find its flight prices?

    We aggregate our prices from over 700+ competitors from airlines to OTAs. We operate in over 30 markets worldwide to show you a wide range of travel options.

Travelling to a place near Belfast?

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

Why use momondo?

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

It is quick and easy to find Chicago to Belfast flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Belfast that suits you.

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

Yes. momondo allows you to filter the results for Chicago to Belfast flights to just show those with flexible booking policies.

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?

Price alerts on flights to Belfast from Chicago are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.

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